plucky (1) docker-container-run.1.gz

Provided by: podman_5.4.0+ds1-1_amd64 bug

NAME

       podman-run - Run a command in a new container

SYNOPSIS

       podman run [options] image [command [arg ...]]

       podman container run [options] image [command [arg ...]]

DESCRIPTION

       Run  a  process  in  a  new  container.  podman  run  starts  a process with its own file system, its own
       networking, and its own isolated process tree. The image which starts the  process  may  define  defaults
       related  to the process that will be run in the container, the networking to expose, and more, but podman
       run gives final control to the operator or administrator who starts the container  from  the  image.  For
       that reason podman run has more options than any other Podman command.

       If  the image is not already loaded then podman run will pull the image, and all image dependencies, from
       the repository in the same way running podman pull image, before it starts the container from that image.

       Several  files  will  be  automatically  created  within  the  container.   These   include   /etc/hosts,
       /etc/hostname,  and  /etc/resolv.conf to manage networking.  These will be based on the host's version of
       the files, though they can be customized with options (for example, --dns will override  the  host's  DNS
       servers  in  the  created  resolv.conf).  Additionally,  a  container environment file is created in each
       container  to  indicate  to  programs  they  are  running  in  a  container.  This  file  is  located  at
       /run/.containerenv  (or  /var/run/.containerenv for FreeBSD containers). When using the --privileged flag
       the .containerenv contains name/value pairs indicating the container engine version, whether  the  engine
       is  running  in  rootless  mode,  the  container  name  and ID, as well as the image name and ID that the
       container is based on. Note: /run/.containerenv will not be created when a volume is mounted on /run.

       When running from a user defined network namespace, the /etc/netns/NSNAME/resolv.conf will be used if  it
       exists, otherwise /etc/resolv.conf will be used.

       Default  settings  are  defined  in containers.conf. Most settings for remote connections use the servers
       containers.conf, except when documented in man pages.

IMAGE

       The image is specified using transport:path format. If no transport is specified, the  docker  (container
       registry)  transport  is  used  by default. For remote Podman, including Mac and Windows (excluding WSL2)
       machines, docker is the only allowed transport.

       dir:path
         An existing local directory path storing the manifest, layer  tarballs  and  signatures  as  individual
       files.  This  is  a  non-standardized  format,  primarily  useful  for debugging or noninvasive container
       inspection.

       $ podman save --format docker-dir fedora -o /tmp/fedora
       $ podman run dir:/tmp/fedora echo hello

       docker://docker-reference (Default)
         An    image    reference    stored    in    a    remote    container    image    registry.     Example:
       "quay.io/podman/stable:latest".  The reference can include a path to a specific registry; if it does not,
       the registries listed in registries.conf are queried to find a matching image.  By  default,  credentials
       from  podman login (stored at $XDG_RUNTIME_DIR/containers/auth.json by default) are used to authenticate;
       otherwise it falls back to using credentials in $HOME/.docker/config.json.

       $ podman run registry.fedoraproject.org/fedora:latest echo hello

       docker-archive:path[:docker-reference] An image  stored  in  the  docker  save  formatted  file.  docker-
       reference is only used when creating such a file, and it must not contain a digest.

       $ podman save --format docker-archive fedora -o /tmp/fedora
       $ podman run docker-archive:/tmp/fedora echo hello

       docker-daemon:docker-reference
         An  image in docker-reference format stored in the docker daemon internal storage. The docker-reference
       can also be an image ID (docker-daemon:algo:digest).

       $ sudo docker pull fedora
       $ sudo podman run docker-daemon:docker.io/library/fedora echo hello

       oci-archive:path:tag
         An image in a directory compliant with the "Open Container Image Layout Specification" at the specified
       path and specified with a tag.

       $ podman save --format oci-archive fedora -o /tmp/fedora
       $ podman run oci-archive:/tmp/fedora echo hello

OPTIONS

   --add-host=hostname[;hostname[;...]]:ip
       Add a custom host-to-IP mapping to the container's /etc/hosts file.

       The  option  takes  one  or  multiple semicolon-separated hostnames to be mapped to a single IPv4 or IPv6
       address, separated by a colon. It can also be used to overwrite the IP addresses of hostnames Podman adds
       to  /etc/hosts  by  default  (also  see  the --name and --hostname options). This option can be specified
       multiple times to add additional mappings to /etc/hosts. It conflicts  with  the  --no-hosts  option  and
       conflicts with no_hosts=true in containers.conf.

       Instead  of an IP address, the special flag host-gateway can be given. This resolves to an IP address the
       container can use to connect to the host. The IP address chosen  depends  on  your  network  setup,  thus
       there's  no  guarantee  that Podman can determine the host-gateway address automatically, which will then
       cause  Podman  to  fail  with  an  error  message.  You  can  overwrite  this  IP   address   using   the
       host_containers_internal_ip option in containers.conf.

       The  host-gateway  address  is  also used by Podman to automatically add the host.containers.internal and
       host.docker.internal hostnames to /etc/hosts.  You can prevent  that  by  either  giving  the  --no-hosts
       option,  or  by setting host_containers_internal_ip="none" in containers.conf. If no host-gateway address
       was configured manually and Podman fails to determine the IP address automatically, Podman will  silently
       skip  adding  these  internal  hostnames  to  /etc/hosts. If Podman is running in a virtual machine using
       podman machine (this includes Mac and Windows hosts), Podman  will  silently  skip  adding  the  internal
       hostnames  to  /etc/hosts,  unless  an  IP  address  was  configured manually; the internal hostnames are
       resolved by the gvproxy DNS resolver instead.

       Podman will use the /etc/hosts file of the host as a basis by default, i.e.  any hostname present in this
       file  will  also  be  present  in  the  /etc/hosts  file  of  the container. A different base file can be
       configured using the base_hosts_file config in containers.conf.

   --annotation=key=value
       Add an annotation to the container. This option can be set multiple times.

   --arch=ARCH
       Override the architecture, defaults to hosts, of the image  to  be  pulled.  For  example,  arm.   Unless
       overridden,  subsequent  lookups  of  the  same  image  in  the  local storage matches this architecture,
       regardless of the host.

   --attach, -a=stdin | stdout | stderr
       Attach to STDIN, STDOUT or STDERR.

       In foreground mode (the default when -d is not specified), podman  run  can  start  the  process  in  the
       container  and attach the console to the process's standard input, output, and error. It can even pretend
       to be a TTY (this is what most command-line executables expect) and pass along signals. The -a option can
       be set for each of stdin, stdout, and stderr.

   --authfile=path
       Path  of  the  authentication  file.  Default  is  ${XDG_RUNTIME_DIR}/containers/auth.json  on Linux, and
       $HOME/.config/containers/auth.json on Windows/macOS.  The  file  is  created  by  podman  login.  If  the
       authorization  state  is not found there, $HOME/.docker/config.json is checked, which is set using docker
       login.

       Note: There is also the option to override the default path of the authentication  file  by  setting  the
       REGISTRY_AUTH_FILE environment variable. This can be done with export REGISTRY_AUTH_FILE=path.

   --blkio-weight=weight
       Block IO relative weight. The weight is a value between 10 and 1000.

       This option is not supported on cgroups V1 rootless systems.

   --blkio-weight-device=device:weight
       Block IO relative device weight.

   --cap-add=capability
       Add Linux capabilities.

   --cap-drop=capability
       Drop Linux capabilities.

   --cgroup-conf=KEY=VALUE
       When  running  on  cgroup  v2,  specify  the cgroup file to write to and its value. For example --cgroup-
       conf=memory.high=1073741824 sets the memory.high limit to 1GB.

   --cgroup-parent=path
       Path to cgroups under which the cgroup for the container is created. If the path  is  not  absolute,  the
       path is considered to be relative to the cgroups path of the init process. Cgroups are created if they do
       not already exist.

   --cgroupns=mode
       Set the cgroup namespace mode for the container.

              • host: use the host's cgroup namespace inside the container.

              • container:id: join the namespace of the specified container.

              • private: create a new cgroup namespace.

              • ns:path: join the namespace at the specified path.

       If the host uses cgroups v1, the default is set to host. On cgroups v2, the default is private.

   --cgroups=how
       Determines whether the container creates CGroups.

       Default is enabled.

       The enabled option creates a new  cgroup  under  the  cgroup-parent.   The  disabled  option  forces  the
       container to not create CGroups, and thus conflicts with CGroup options (--cgroupns and --cgroup-parent).
       The no-conmon option disables a new CGroup only for the conmon process.   The  split  option  splits  the
       current  CGroup  in two sub-cgroups: one for conmon and one for the container payload. It is not possible
       to set --cgroup-parent with split.

   --chrootdirs=path
       Path to a directory inside the container that is treated as a chroot directory.  Any Podman managed  file
       (e.g.,  /etc/resolv.conf,  /etc/hosts,  etc/hostname)  that is mounted into the root directory is mounted
       into that location as well.  Multiple directories are separated with a comma.

   --cidfile=file
       Write the container ID to file.  The file is removed along with the  container,  except  when  used  with
       podman --remote run on detached containers.

   --conmon-pidfile=file
       Write  the pid of the conmon process to a file. As conmon runs in a separate process than Podman, this is
       necessary when using systemd to restart Podman containers.  (This option is not available with the remote
       Podman client, including Mac and Windows (excluding WSL2) machines)

   --cpu-period=limit
       Set the CPU period for the Completely Fair Scheduler (CFS), which is a duration in microseconds. Once the
       container's CPU quota is used up, it will not be scheduled to run until the current period ends. Defaults
       to 100000 microseconds.

       On  some  systems,  changing the resource limits may not be allowed for non-root users. For more details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --cpu-quota=limit
       Limit the CPU Completely Fair Scheduler (CFS) quota.

       Limit  the  container's  CPU usage. By default, containers run with the full CPU resource. The limit is a
       number in microseconds. If a number is provided, the container is allowed to use that much CPU time until
       the CPU period ends (controllable via --cpu-period).

       On  some  systems,  changing the resource limits may not be allowed for non-root users. For more details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --cpu-rt-period=microseconds
       Limit the CPU real-time period in microseconds.

       Limit  the container's Real Time CPU usage. This option tells the kernel to restrict the container's Real
       Time CPU usage to the period specified.

       This option is only supported on cgroups V1 rootful systems.

   --cpu-rt-runtime=microseconds
       Limit the CPU real-time runtime in microseconds.

       Limit the containers Real Time CPU usage. This option tells the kernel to limit the amount of time  in  a
       given  CPU  period  Real Time tasks may consume. Ex: Period of 1,000,000us and Runtime of 950,000us means
       that this container can consume 95% of available CPU and leave the remaining 5% to normal priority tasks.

       The sum of all runtimes across containers cannot exceed the amount allotted to the parent cgroup.

       This option is only supported on cgroups V1 rootful systems.

   --cpu-shares, -c=shares
       CPU shares (relative weight).

       By default, all containers get the same proportion of CPU cycles. This  proportion  can  be  modified  by
       changing  the  container's  CPU  share  weighting  relative  to  the  combined  weight of all the running
       containers.  Default weight is 1024.

       The proportion only applies when CPU-intensive processes are running.  When tasks in  one  container  are
       idle,  other containers can use the left-over CPU time. The actual amount of CPU time varies depending on
       the number of containers running on the system.

       For example, consider three containers, one has a cpu-share of 1024  and  two  others  have  a  cpu-share
       setting  of  512.  When processes in all three containers attempt to use 100% of CPU, the first container
       receives 50% of the total CPU time. If a fourth container is added with a cpu-share of  1024,  the  first
       container only gets 33% of the CPU. The remaining containers receive 16.5%, 16.5% and 33% of the CPU.

       On a multi-core system, the shares of CPU time are distributed over all CPU cores. Even if a container is
       limited to less than 100% of CPU time, it can use 100% of each individual CPU core.

       For example, consider a system with more than three cores.  If the container C0 is  started  with  --cpu-
       shares=512  running  one  process, and another container C1 with --cpu-shares=1024 running two processes,
       this can result in the following division of CPU shares:

       ┌────┬───────────┬─────┬──────────────┐
       │PIDcontainerCPUCPU share    │
       ├────┼───────────┼─────┼──────────────┤
       │100 │ C0        │ 0   │ 100% of CPU0 │
       ├────┼───────────┼─────┼──────────────┤
       │101 │ C1        │ 1   │ 100% of CPU1 │
       ├────┼───────────┼─────┼──────────────┤
       │102 │ C1        │ 2   │ 100% of CPU2 │
       └────┴───────────┴─────┴──────────────┘

       On some systems, changing the resource limits may not be allowed for non-root users.  For  more  details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --cpus=number
       Number of CPUs. The default is 0.0 which means no limit. This is shorthand for  --cpu-period  and  --cpu-
       quota, therefore the option cannot be specified with --cpu-period or --cpu-quota.

       On  some  systems,  changing  the CPU limits may not be allowed for non-root users. For more details, see
       https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-resource-
       limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --cpuset-cpus=number
       CPUs in which to allow execution. Can be specified as a comma-separated list (e.g. 0,1), as a range (e.g.
       0-3), or any combination thereof (e.g. 0-3,7,11-15).

       On some systems, changing the resource limits may not be allowed for non-root users.  For  more  details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --cpuset-mems=nodes
       Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.

       If there are four memory nodes on the system (0-3), use --cpuset-mems=0,1 then processes in the container
       only uses memory from the first two memory nodes.

       On  some  systems,  changing the resource limits may not be allowed for non-root users. For more details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --decryption-key=key[:passphrase]
       The  [key[:passphrase]]  to  be used for decryption of images. Key can point to keys and/or certificates.
       Decryption is tried with all keys. If the key is protected by a passphrase, it is required to  be  passed
       in the argument and omitted otherwise.

   --detach, -d
       Detached mode: run the container in the background and print the new container ID. The default is false.

       At  any  time  run  podman  ps in the other shell to view a list of the running containers. Reattach to a
       detached container with podman attach command.

       When attached via tty mode, detach from the container (and leave it running)  using  a  configurable  key
       sequence.  The  default  sequence  is  ctrl-p,ctrl-q.   Specify  the key sequence using the --detach-keys
       option, or configure it in the containers.conf file: see containers.conf(5) for more information.

   --detach-keys=sequence
       Specify the key sequence for detaching a container. Format is a single character [a-Z]  or  one  or  more
       ctrl-<value>  characters  where  <value>  is  one  of:  a-z, @, ^, [, , or _. Specifying "" disables this
       feature. The default is ctrl-p,ctrl-q.

       This option can also be set in containers.conf(5) file.

   --device=host-device[:container-device][:permissions]
       Add a host device to the container.  Optional  permissions  parameter  can  be  used  to  specify  device
       permissions by combining r for read, w for write, and m for mknod(2).

       Example: --device=/dev/sdc:/dev/xvdc:rwm.

       Note:  if  host-device is a symbolic link then it is resolved first.  The container only stores the major
       and minor numbers of the host device.

       Podman may load kernel modules required for using the specified device. The  devices  that  Podman  loads
       modules for when necessary are: /dev/fuse.

       In  rootless  mode,  the  new  device  is  bind mounted in the container from the host rather than Podman
       creating it within the container space. Because the bind mount  retains  its  SELinux  label  on  SELinux
       systems,  the  container  can  get  permission  denied  when accessing the mounted device. Modify SELinux
       settings to allow containers to use all device labels via the following command:

       $ sudo setsebool -P  container_use_devices=true

       Note: if the user only has access rights via a  group,  accessing  the  device  from  inside  a  rootless
       container  fails. Use the --group-add keep-groups flag to pass the user's supplementary group access into
       the container.

   --device-cgroup-rule="type major:minor mode"
       Add a rule to the cgroup allowed devices list. The rule is expected to be in the format specified in  the
       Linux  kernel  documentation  admin-guide/cgroup-v1/devices:  -  type: a (all), c (char), or b (block); -
       major and minor: either a number, or * for all; - mode: a composition of  r  (read),  w  (write),  and  m
       (mknod(2)).

   --device-read-bps=path:rate
       Limit read rate (in bytes per second) from a device (e.g. --device-read-bps=/dev/sda:1mb).

       On  some  systems,  changing the resource limits may not be allowed for non-root users. For more details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --device-read-iops=path:rate
       Limit read rate (in IO operations per second) from a device (e.g. --device-read-iops=/dev/sda:1000).

       On  some  systems,  changing the resource limits may not be allowed for non-root users. For more details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --device-write-bps=path:rate
       Limit write rate (in bytes per second) to a device (e.g. --device-write-bps=/dev/sda:1mb).

       On  some  systems,  changing the resource limits may not be allowed for non-root users. For more details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --device-write-iops=path:rate
       Limit write rate (in IO operations per second) to a device (e.g. --device-write-iops=/dev/sda:1000).

       On  some  systems,  changing the resource limits may not be allowed for non-root users. For more details,
       see         https://github.com/containers/podman/blob/main/troubleshooting.md#26-running-containers-with-
       resource-limits-fails-with-a-permissions-error

       This option is not supported on cgroups V1 rootless systems.

   --disable-content-trust
       This  is  a  Docker-specific  option  to  disable  image  verification to a container registry and is not
       supported by Podman. This option is a NOOP and provided solely for scripting compatibility.

   --dns=ipaddr
       Set custom DNS servers.

       This option can be used to override the DNS configuration passed to  the  container.  Typically  this  is
       necessary  when  the  host DNS configuration is invalid for the container (e.g., 127.0.0.1). When this is
       the case the --dns flag is necessary for every run.

       The special value none can be specified to disable creation  of  /etc/resolv.conf  in  the  container  by
       Podman.  The /etc/resolv.conf file in the image is used without changes.

       This option cannot be combined with --network that is set to none or container:id.

   --dns-option=option
       Set custom DNS options. Invalid if using --dns-option with --network that is set to none or container:id.

   --dns-search=domain
       Set  custom  DNS  search  domains.  Invalid  if  using --dns-search with --network that is set to none or
       container:id.  Use --dns-search=. to remove the search domain.

   --entrypoint="command" | '["command", arg1 , ...]'
       Override the default ENTRYPOINT from the image.

       The ENTRYPOINT of an image is similar to a COMMAND because it specifies what executable to run  when  the
       container  starts, but it is (purposely) more difficult to override. The ENTRYPOINT gives a container its
       default nature or behavior. When the ENTRYPOINT is set, the container runs as if  it  were  that  binary,
       complete with default options. More options can be passed in via the COMMAND. But, if a user wants to run
       something else inside the container, the --entrypoint option allows a new ENTRYPOINT to be specified.

       Specify multi option commands in the form of a json string.

   --env, -e=env
       Set environment variables.

       This option allows arbitrary environment variables that are available for  the  process  to  be  launched
       inside  of the container. If an environment variable is specified without a value, Podman checks the host
       environment for a value and set the variable only if it is set on the host. As  a  special  case,  if  an
       environment  variable  ending in * is specified without a value, Podman searches the host environment for
       variables starting with the prefix and adds those variables to the container.

       See ⟨#environment⟩ note below for precedence and examples.

   --env-file=file
       Read in a line-delimited file of environment variables.

       See ⟨#environment⟩ note below for precedence and examples.

   --env-host
       Use host environment inside of the container. See Environment note below for precedence. (This option  is
       not available with the remote Podman client, including Mac and Windows (excluding WSL2) machines)

   --env-merge=env
       Preprocess  default  environment  variables for the containers. For example if image contains environment
       variable hello=world user can preprocess  it  using  --env-merge  hello=${hello}-some  so  new  value  is
       hello=world-some.

       Please note that if the environment variable hello is not present in the image, then it'll be replaced by
       an empty string  and  so  using  --env-merge  hello=${hello}-some  would  result  in  the  new  value  of
       hello=-some, notice the leading - delimiter.

   --expose=port[/protocol]
       Expose a port or a range of ports (e.g. --expose=3300-3310).  The protocol can be tcp, udp or sctp and if
       not given tcp is assumed.  This option matches the EXPOSE instruction for image builds and has no  effect
       on  the  actual  networking  rules  unless  -P/--publish-all is used to forward to all exposed ports from
       random host ports. To forward specific ports from the host into the container use the -p/--publish option
       instead.

   --gidmap=[flags]container_uid:from_uid[:amount]
       Run  the container in a new user namespace using the supplied GID mapping. This option conflicts with the
       --userns and --subgidname options. This option provides a way to map host GIDs to container GIDs  in  the
       same way as --uidmap maps host UIDs to container UIDs. For details see --uidmap.

       Note: the --gidmap option cannot be called in conjunction with the --pod option as a gidmap cannot be set
       on the container level when in a pod.

   --gpus=ENTRY
       GPU devices to add to the container ('all' to pass all GPUs) Currently only Nvidia devices are supported.

   --group-add=group | keep-groups
       Assign additional groups to the primary user running within the container process.

              • keep-groups is a special flag that tells Podman to keep the supplementary group access.

       Allows container to use the user's supplementary group access.  If  file  systems  or  devices  are  only
       accessible  by  the  rootless user's group, this flag tells the OCI runtime to pass the group access into
       the container. Currently only available with the crun OCI runtime. Note: keep-groups is exclusive,  other
       groups  cannot be specified with this flag. (Not available for remote commands, including Mac and Windows
       (excluding WSL2) machines)

   --group-entry=ENTRY
       Customize the entry that is written to the /etc/group file within the container when --user is used.

       The variables $GROUPNAME, $GID, and $USERLIST are automatically replaced with their value at  runtime  if
       present.

   --health-cmd="command" | '["command", arg1 , ...]'
       Set  or  alter  a healthcheck command for a container. The command is a command to be executed inside the
       container that determines the container health. The command is required for other healthcheck options  to
       be applied. A value of none disables existing healthchecks.

       Multiple  options  can be passed in the form of a JSON array; otherwise, the command is interpreted as an
       argument to /bin/sh -c.

   --health-interval=interval
       Set an interval for the healthchecks. An interval of disable results in no  automatic  timer  setup.  The
       default is 30s.

   --health-log-destination=directory_path
       Set  the  destination of the HealthCheck log. Directory path, local or events_logger (local use container
       state file) (Default: local)

              • local:  (default)  HealthCheck  logs  are  stored   in   overlay   containers.   (For   example:
                $runroot/healthcheck.log)

              • directory:  creates a log file named <container-ID>-healthcheck.log with HealthCheck logs in the
                specified directory.

              • events_logger: The log will be written with logging mechanism  set  by  events_logger.  It  also
                saves the log to a default directory, for performance on a system with a large number of logs.

   --health-max-log-count=number of stored logs
       Set  maximum  number  of  attempts  in  the  HealthCheck log file. ('0' value means an infinite number of
       attempts in the log file) (Default: 5 attempts)

   --health-max-log-size=size of stored logs
       Set maximum length in characters of stored HealthCheck log. ("0" value  means  an  infinite  log  length)
       (Default: 500 characters)

   --health-on-failure=action
       Action to take once the container transitions to an unhealthy state.  The default is none.

              • none: Take no action.

              • kill: Kill the container.

              • restart:  Restart  the  container.   Do  not combine the restart action with the --restart flag.
                When running inside of a systemd unit, consider using the kill or stop action  instead  to  make
                use of systemd's restart policy.

              • stop: Stop the container.

   --health-retries=retries
       The number of retries allowed before a healthcheck is considered to be unhealthy. The default value is 3.

   --health-start-period=period
       The  initialization  time  needed for a container to bootstrap. The value can be expressed in time format
       like 2m3s. The default value is 0s.

       Note: The health check command is executed as soon as a container is started,  if  the  health  check  is
       successful  the  container's health state will be updated to healthy. However, if the health check fails,
       the health state will stay as starting until either the health check is successful or until the --health-
       start-period  time  is  over.  If  the health check command fails after the --health-start-period time is
       over, the health state will be updated to unhealthy.  The health check command is  executed  periodically
       based on the value of --health-interval.

   --health-startup-cmd="command" | '["command", arg1 , ...]'
       Set  a  startup healthcheck command for a container. This command is executed inside the container and is
       used to gate the regular healthcheck. When the startup command succeeds, the regular  healthcheck  begins
       and  the  startup  healthcheck ceases. Optionally, if the command fails for a set number of attempts, the
       container is restarted. A startup healthcheck can be used to ensure  that  containers  with  an  extended
       startup period are not marked as unhealthy until they are fully started. Startup healthchecks can only be
       used when a regular healthcheck (from the container's image or the --health-cmd option) is also set.

   --health-startup-interval=interval
       Set an interval for the startup healthcheck. An interval of disable results in no automatic timer  setup.
       The default is 30s.

   --health-startup-retries=retries
       The  number  of  attempts allowed before the startup healthcheck restarts the container. If set to 0, the
       container is never restarted. The default is 0.

   --health-startup-success=retries
       The number of  successful  runs  required  before  the  startup  healthcheck  succeeds  and  the  regular
       healthcheck begins. A value of 0 means that any success begins the regular healthcheck. The default is 0.

   --health-startup-timeout=timeout
       The  maximum  time a startup healthcheck command has to complete before it is marked as failed. The value
       can be expressed in a time format like 2m3s. The default value is 30s.

   --health-timeout=timeout
       The maximum time allowed to complete the healthcheck before an interval is considered failed. Like start-
       period, the value can be expressed in a time format such as 1m22s. The default value is 30s.

   --help
       Print usage statement

   --hostname, -h=name
       Set the container's hostname inside the container.

       This  option can only be used with a private UTS namespace --uts=private (default). If --pod is given and
       the pod shares the same UTS namespace (default), the pod's hostname is used. The given hostname  is  also
       added to the /etc/hosts file using the container's primary IP address (also see the --add-host option).

   --hosts-file=path | none | image
       Base  file  to create the /etc/hosts file inside the container. This must either be an absolute path to a
       file on the host system, or one of the following special flags:
         ""      Follow the base_hosts_file configuration in containers.conf (the default)
         none  Do not use a base file (i.e. start with an empty file)
         image Use the container image's /etc/hosts file as base file

   --hostuser=name
       Add a user account to /etc/passwd from the host to the container. The Username or UID must exist  on  the
       host system.

   --http-proxy
       By  default proxy environment variables are passed into the container if set for the Podman process. This
       can be disabled by setting the value to false.  The environment variables passed in  include  http_proxy,
       https_proxy,  ftp_proxy,  no_proxy, and also the upper case versions of those. This option is only needed
       when the host system must use a proxy but the  container  does  not  use  any  proxy.  Proxy  environment
       variables specified for the container in any other way overrides the values that have been passed through
       from the host. (Other ways to specify the proxy for the container include passing  the  values  with  the
       --env  flag,  or  hard  coding the proxy environment at container build time.)  When used with the remote
       client it uses the proxy environment variables that are set on the server process.

       Defaults to true.

   --image-volume=bind | tmpfs | ignore
       Tells Podman how to handle the builtin image volumes. Default is bind.

              • bind: An anonymous named volume is created and mounted into the container.

              • tmpfs: The volume is mounted onto the container as a tmpfs, which allows  the  users  to  create
                content that disappears when the container is stopped.

              • ignore: All volumes are just ignored and no action is taken.

   --init
       Run an init inside the container that forwards signals and reaps processes.  The container-init binary is
       mounted at /run/podman-init.  Mounting over /run breaks container execution.

   --init-path=path
       Path to the container-init binary.

   --interactive, -i
       When set to true, make stdin available to the contained process. If false, the  stdin  of  the  contained
       process is empty and immediately closed.

       If  attached,  stdin is piped to the contained process. If detached, reading stdin will block until later
       attached.

       Caveat: Podman will consume input from stdin as soon as it  becomes  available,  even  if  the  contained
       process doesn't request it.

   --ip=ipv4
       Specify  a static IPv4 address for the container, for example 10.88.64.128.  This option can only be used
       if the container is joined to only a single network - i.e., --network=network-name is used at most once -
       and  if  the  container  is not joining another container's network namespace via --network=container:id.
       The address must be within the network's IP address pool (default 10.88.0.0/16).

       To specify multiple static IP addresses per container, set multiple networks using the  --network  option
       with a static IP address specified for each using the ip mode for that option.

   --ip6=ipv6
       Specify  a  static  IPv6 address for the container, for example fd46:db93:aa76:ac37::10.  This option can
       only be used if the container is joined to only a single network - i.e., --network=network-name  is  used
       at  most  once  -  and  if  the  container  is  not  joining  another  container's  network namespace via
       --network=container:id.  The address must be within the network's IPv6 address pool.

       To specify multiple static IPv6 addresses per container, set multiple networks using the --network option
       with a static IPv6 address specified for each using the ip6 mode for that option.

   --ipc=ipc
       Set the IPC namespace mode for a container. The default is to create a private IPC namespace.

              • "": Use Podman's default, defined in containers.conf.

              • container:id: reuses another container's shared memory, semaphores, and message queues

              • host:  use  the host's shared memory, semaphores, and message queues inside the container. Note:
                the host mode gives the container full access to local shared memory and is therefore considered
                insecure.

              • none:  private IPC namespace, with /dev/shm not mounted.

              • ns:path: path to an IPC namespace to join.

              • private: private IPC namespace.

              • shareable: private IPC namespace with a possibility to share it with other containers.

   --label, -l=key=value
       Add metadata to a container.

   --label-file=file
       Read in a line-delimited file of labels.

   --link-local-ip=ip
       Not implemented.

   --log-driver=driver
       Logging  driver  for the container. Currently available options are k8s-file, journald, none, passthrough
       and passthrough-tty, with json-file aliased to k8s-file for scripting compatibility. (Default journald).

       The podman info command below displays the default log-driver for the system.

       $ podman info --format '{{ .Host.LogDriver }}'
       journald

       The passthrough driver passes down the standard streams (stdin, stdout, stderr) to the container.  It  is
       not  allowed with the remote Podman client, including Mac and Windows (excluding WSL2) machines, and on a
       tty, since it is vulnerable to attacks via TIOCSTI.

       The passthrough-tty driver is the same as passthrough except that it also allows it to be used on  a  TTY
       if the user really wants it.

   --log-opt=name=value
       Logging driver specific options.

       Set custom logging configuration. The following *name*s are supported:

       path: specify a path to the log file
           (e.g. --log-opt path=/var/log/container/mycontainer.json);

       max-size: specify a max size of the log file
           (e.g. --log-opt max-size=10mb);

       tag: specify a custom log tag for the container
           (e.g.  --log-opt  tag="{{.ImageName}}".   It supports the same keys as podman inspect --format.  This
       option is currently supported only by the journald log driver.

   --mac-address=address
       Container network interface MAC address (e.g. 92:d0:c6:0a:29:33) This option can  only  be  used  if  the
       container is joined to only a single network - i.e., --network=network-name is used at most once - and if
       the container is not joining another container's network namespace via --network=container:id.

       Remember that the MAC address in an Ethernet network must be unique.   The  IPv6  link-local  address  is
       based on the device's MAC address according to RFC4862.

       To  specify multiple static MAC addresses per container, set multiple networks using the --network option
       with a static MAC address specified for each using the mac mode for that option.

   --memory, -m=number[unit]
       Memory limit. A unit can be b (bytes), k (kibibytes), m (mebibytes), or g (gibibytes).

       Allows the memory available to a container to be constrained. If the host supports swap memory, then  the
       -m  memory  setting  can  be  larger  than physical RAM. If a limit of 0 is specified (not using -m), the
       container's memory is not limited. The actual limit may be rounded up to  a  multiple  of  the  operating
       system's page size (the value is very large, that's millions of trillions).

       This option is not supported on cgroups V1 rootless systems.

   --memory-reservation=number[unit]
       Memory soft limit. A unit can be b (bytes), k (kibibytes), m (mebibytes), or g (gibibytes).

       After setting memory reservation, when the system detects memory contention or low memory, containers are
       forced to restrict their consumption to their reservation.  So  always  set  the  value  below  --memory,
       otherwise the hard limit takes precedence. By default, memory reservation is the same as memory limit.

       This option is not supported on cgroups V1 rootless systems.

   --memory-swap=number[unit]
       A  limit  value  equal  to memory plus swap.  A unit can be b (bytes), k (kibibytes), m (mebibytes), or g
       (gibibytes).

       Must be used with the -m (--memory) flag.  The argument value must be larger than that of
        -m (--memory) By default, it is set to double the value of --memory.

       Set number to -1 to enable unlimited swap.

       This option is not supported on cgroups V1 rootless systems.

   --memory-swappiness=number
       Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.

       This flag is only supported on cgroups V1 rootful systems.

   --mount=type=TYPE,TYPE-SPECIFIC-OPTION[,...]
       Attach a filesystem mount to the container

       Current supported mount TYPEs are bind, devpts, glob, image, ramfs, tmpfs and volume.

       Options common to all mount types:

              • src, source: mount source spec for bind, glob, and volume.  Mandatory for bind and glob.

              • dst, destination, target: mount destination spec.

       When source globs are specified without the destination directory, the files and directories are  mounted
       with  their  complete  path  within  the  container.  When  the  destination  is specified, the files and
       directories matching the glob on the base file name on the destination directory are mounted. The  option
       type=glob,src=/foo*,destination=/tmp/bar  tells  container  engines to mount host files matching /foo* to
       the /tmp/bar/ directory in the container.

       Options specific to type=volume:

              • ro, readonly: true or false (default if unspecified: false).

              • U, chown: true or false (default if unspecified: false). Recursively change the owner and  group
                of the source volume based on the UID and GID of the container.

              • idmap:  If  specified,  create  an idmapped mount to the target user namespace in the container.
                The idmap option is only supported by Podman in rootful mode. The Linux kernel  does  not  allow
                the  use  of  idmaped  file  systems for unprivileged users.  The idmap option supports a custom
                mapping that can be different than the user namespace used by the container.  The mapping can be
                specified  after  the  idmap  option  like:  idmap=uids=0-1-10#10-11-10;gids=0-100-10.  For each
                triplet, the first value is the start of the backing file system IDs  that  are  mapped  to  the
                second  value  on  the  host.  The length of this mapping is given in the third value.  Multiple
                ranges are separated with #.  If the specified mapping is prepended with a '@' then the  mapping
                is  considered  relative to the container user namespace. The host ID for the mapping is changed
                to account for the relative position of the container user in the container user namespace.

       Options specific to type=image:

              • rw, readwrite: true or false (default if unspecified: false).

              • subpath: Mount only a specific path within the image, instead of the whole image.

       Options specific to bind and glob:

              • ro, readonly: true or false (default if unspecified: false).

              • bind-propagation: shared, slave, private, unbindable, rshared, rslave, runbindable, or  rprivate
                (default).[1] ⟨#Footnote1⟩ See also mount(2).

              • bind-nonrecursive: do not set up a recursive bind mount. By default it is recursive.

              • relabel: shared, private.

              • idmap:  true or false (default if unspecified: false).  If true, create an idmapped mount to the
                target user namespace in the container. The idmap option is only supported by Podman in  rootful
                mode.

              • U,  chown: true or false (default if unspecified: false). Recursively change the owner and group
                of the source volume based on the UID and GID of the container.

              • no-dereference: do not dereference symlinks but copy the link source into the mount destination.

       Options specific to type=tmpfs and ramfs:

              • ro, readonly: true or false (default if unspecified: false).

              • tmpfs-size: Size of the tmpfs/ramfs mount, in bytes. Unlimited by default in Linux.

              • tmpfs-mode: Octal file mode of the tmpfs/ramfs (e.g. 700 or 0700.).

              • tmpcopyup: Enable copyup from the image directory at the same location to the tmpfs/ramfs.  Used
                by default.

              • notmpcopyup: Disable copying files from the image to the tmpfs/ramfs.

              • U,  chown: true or false (default if unspecified: false). Recursively change the owner and group
                of the source volume based on the UID and GID of the container.

       Options specific to type=devpts:

              • uid: numeric UID of the file owner (default: 0).

              • gid: numeric GID of the file owner (default: 0).

              • mode: octal permission mask for the file (default: 600).

              • max: maximum number of PTYs (default: 1048576).

       Examples:

              • type=bind,source=/path/on/host,destination=/path/in/containertype=bind,src=/path/on/host,dst=/path/in/container,relabel=sharedtype=bind,src=/path/on/host,dst=/path/in/container,relabel=shared,U=truetype=devpts,destination=/dev/ptstype=glob,src=/usr/lib/libfoo*,destination=/usr/lib,ro=truetype=image,source=fedora,destination=/fedora-image,rw=truetype=ramfs,tmpfs-size=512M,destination=/path/in/containertype=tmpfs,tmpfs-size=512M,destination=/path/in/containertype=tmpfs,destination=/path/in/container,noswaptype=volume,source=vol1,destination=/path/in/container,ro=true

   --name=name
       Assign a name to the container.

       The operator can identify a container in three ways:

              • UUID long identifier (“f78375b1c487e03c9438c729345e54db9d20cfa2ac1fc3494b6eb60872e74778”);

              • UUID short identifier (“f78375b1c487”);

              • Name (“jonah”).

       Podman generates a UUID for each container, and if no name is assigned to  the  container  using  --name,
       Podman  generates  a  random string name. The name can be useful as a more human-friendly way to identify
       containers. This works for both background and foreground containers. The container's name is also  added
       to the /etc/hosts file using the container's primary IP address (also see the --add-host option).

   --network=mode, --net
       Set the network mode for the container.

       Valid mode values are:

              • bridge[:OPTIONS,...]:  Create  a  network  stack  on the default bridge. This is the default for
                rootful containers. It is possible to specify these additional options:

                • alias=name: Add network-scoped alias for the container.

                • ip=IPv4: Specify a static IPv4 address for this container.

                • ip6=IPv6: Specify a static IPv6 address for this container.

                • mac=MAC: Specify a static MAC address for this container.

                • interface_name=name: Specify a name for the created network interface inside the container.

                • host_interface_name=name: Specify a  name  for  the  created  network  interface  outside  the
                  container.

              Any  other  options  will  be passed through to netavark without validation. This can be useful to
              pass arguments to netavark plugins.For example, to set a static ipv4  address  and  a  static  mac
              address, use --network bridge:ip=10.88.0.10,mac=44:33:22:11:00:99.

              • <network  name or ID>[:OPTIONS,...]: Connect to a user-defined network; this is the network name
                or ID from a network created by podman network create.  It  is  possible  to  specify  the  same
                options  described  under  the  bridge  mode  above.  Use the --network option multiple times to
                specify additional networks.
                For backwards compatibility it is also possible to specify comma-separated networks on the first
                --network  argument, however this prevents you from using the options described under the bridge
                section above.

              • none: Create a network namespace for the container but do not configure network  interfaces  for
                it, thus the container has no network connectivity.

              • container:id: Reuse another container's network stack.

              • host:  Do  not create a network namespace, the container uses the host's network. Note: The host
                mode gives the container full access to local system services such as  D-bus  and  is  therefore
                considered insecure.

              • ns:path: Path to a network namespace to join.

              • private:  Create  a  new  namespace  for  the  container.  This uses the bridge mode for rootful
                containers and slirp4netns for rootless ones.

              • slirp4netns[:OPTIONS,...]: use slirp4netns(1) to create a user network stack. It is possible  to
                specify   these   additional   options,  they  can  also  be  set  with  network_cmd_options  in
                containers.conf:

                • allow_host_loopback=true|false: Allow slirp4netns to reach the host loopback  IP  (default  is
                  10.0.2.2  or  the  second  IP  from  slirp4netns cidr subnet when changed, see the cidr option
                  below). The default is false.

                • mtu=MTU: Specify the MTU to use for this network. (Default is 65520).

                • cidr=CIDR: Specify ip range to use for this network. (Default is 10.0.2.0/24).

                • enable_ipv6=true|false: Enable IPv6. Default is true. (Required for outbound_addr6).

                • outbound_addr=INTERFACE: Specify the outbound interface slirp binds to (ipv4 traffic only).

                • outbound_addr=IPv4: Specify the outbound ipv4 address slirp binds to.

                • outbound_addr6=INTERFACE: Specify the outbound interface slirp binds to (ipv6 traffic only).

                • outbound_addr6=IPv6: Specify the outbound ipv6 address slirp binds to.

                • port_handler=rootlesskit: Use rootlesskit for port forwarding. Default.
                  Note: Rootlesskit changes the source IP address of incoming packets to an IP  address  in  the
                  container  network  namespace, usually 10.0.2.100. If the application requires the real source
                  IP address, e.g. web server logs, use the  slirp4netns  port  handler.  The  rootlesskit  port
                  handler is also used for rootless containers when connected to user-defined networks.

                • port_handler=slirp4netns:  Use  the slirp4netns port forwarding, it is slower than rootlesskit
                  but preserves the correct source IP address. This port handler cannot be used for user-defined
                  networks.

              • pasta[:OPTIONS,...]: use pasta(1) to create a user-mode networking stack.
                This is the default for rootless containers and only supported in rootless mode.
                By  default,  IPv4  and IPv6 addresses and routes, as well as the pod interface name, are copied
                from the host. If port forwarding isn't configured, ports are forwarded dynamically as  services
                are  bound on either side (init namespace or container namespace). Port forwarding preserves the
                original source IP address. Options described in pasta(1) can be  specified  as  comma-separated
                arguments.
                In terms of pasta(1) options, --config-net is given by default, in order to configure networking
                when the container is started, and --no-map-gw is also  assumed  by  default,  to  avoid  direct
                access from container to host using the gateway address. The latter can be overridden by passing
                --map-gw in the pasta-specific options (despite not being an actual pasta(1) option).
                Also, -t none and -u none are passed if, respectively, no TCP or UDP port forwarding  from  host
                to  container  is  configured,  to  disable  automatic  port  forwarding  based  on bound ports.
                Similarly, -T none and -U none are given to disable the same  functionality  from  container  to
                host.
                Some examples:

                • pasta:--map-gw: Allow the container to directly reach the host using the gateway address.

                • pasta:--mtu,1500: Specify a 1500 bytes MTU for the tap interface in the container.

                • pasta:--ipv4-only,-a,10.0.2.0,-n,24,-g,10.0.2.2,--dns-forward,10.0.2.3,-m,1500,--no-ndp,--no-
                  dhcpv6,--no-dhcp,  equivalent  to  default  slirp4netns(1)  options:  disable   IPv6,   assign
                  10.0.2.0/24  to  the  tap0  interface  in  the  container,  with  gateway 10.0.2.3, enable DNS
                  forwarder reachable at 10.0.2.3, set MTU to 1500 bytes, disable NDP, DHCPv6 and DHCP support.

                • pasta:-I,tap0,--ipv4-only,-a,10.0.2.0,-n,24,-g,10.0.2.2,--dns-forward,10.0.2.3,--no-ndp,--no-
                  dhcpv6,--no-dhcp,  equivalent to default slirp4netns(1) options with Podman overrides: same as
                  above, but leave the MTU to 65520 bytes

                • pasta:-t,auto,-u,auto,-T,auto,-U,auto: enable automatic  port  forwarding  based  on  observed
                  bound ports from both host and container sides

                • pasta:-T,5201:  enable  forwarding of TCP port 5201 from container to host, using the loopback
                  interface instead of the tap interface for improved performance

       Invalid if using --dns, --dns-option, or --dns-search with --network set to none or container:id.

       If used together with --pod, the container joins the pod's network namespace.

   --network-alias=alias
       Add a network-scoped alias for the container, setting the alias  for  all  networks  that  the  container
       joins.  To  set a name only for a specific network, use the alias option as described under the --network
       option.  If the network has DNS enabled (podman network inspect -f {{.DNSEnabled}} <name>), these aliases
       can be used for name resolution on the given network. This option can be specified multiple times.  NOTE:
       When using CNI a container only has access to aliases on the first network that it joins. This limitation
       does not exist with netavark/aardvark-dns.

   --no-healthcheck
       Disable any defined healthchecks for container.

   --no-hostname
       Do not create the /etc/hostname file in the containers.

       By  default,  Podman manages the /etc/hostname file, adding the container's own hostname.  When the --no-
       hostname option is set, the image's /etc/hostname will be preserved unmodified if it exists.

   --no-hosts
       Do not modify the /etc/hosts file in the container.

       Podman assumes control over the  container's  /etc/hosts  file  by  default  and  adds  entries  for  the
       container's   name   (see   --name   option)   and   hostname   (see  --hostname  option),  the  internal
       host.containers.internal and host.docker.internal hosts, as well as any hostname added using  the  --add-
       host  option.  Refer  to the --add-host option for details. Passing --no-hosts disables this, so that the
       image's /etc/hosts file is kept unmodified. The same can be achieved globally by setting no_hosts=true in
       containers.conf.

       This option conflicts with --add-host.

   --oom-kill-disable
       Whether to disable OOM Killer for the container or not.

       This flag is not supported on cgroups V2 systems.

   --oom-score-adj=num
       Tune the host's OOM preferences for containers (accepts values from -1000 to 1000).

       When  running in rootless mode, the specified value can't be lower than the oom_score_adj for the current
       process. In this case, the oom-score-adj is clamped to the current process value.

   --os=OS
       Override the OS, defaults to hosts, of the image to be pulled. For example, windows.  Unless  overridden,
       subsequent lookups of the same image in the local storage matches this OS, regardless of the host.

   --passwd
       Allow  Podman  to  add  entries  to  /etc/passwd  and /etc/group when used in conjunction with the --user
       option.  This is used to override the Podman provided user setup in favor  of  entrypoint  configurations
       such as libnss-extrausers.

   --passwd-entry=ENTRY
       Customize the entry that is written to the /etc/passwd file within the container when --passwd is used.

       The variables $USERNAME, $UID, $GID, $NAME, $HOME are automatically replaced with their value at runtime.

   --personality=persona
       Personality sets the execution domain via Linux personality(2).

   --pid=mode
       Set  the  PID namespace mode for the container.  The default is to create a private PID namespace for the
       container.

              • container:id: join another container's PID namespace;

              • host: use the host's PID namespace for the container. Note the host  mode  gives  the  container
                full access to local PID and is therefore considered insecure;

              • ns:path: join the specified PID namespace;

              • private: create a new namespace for the container (default).

   --pidfile=path
       When  the  pidfile  location  is  specified,  the container process' PID is written to the pidfile. (This
       option is not available with the remote  Podman  client,  including  Mac  and  Windows  (excluding  WSL2)
       machines)   If  the  pidfile  option  is  not  specified,  the  container  process'  PID  is  written  to
       /run/containers/storage/${storage-driver}-containers/$CID/userdata/pidfile.

       After the container is started, the location for the pidfile can be discovered with the following  podman
       inspect command:

       $ podman inspect --format '{{ .PidFile }}' $CID
       /run/containers/storage/${storage-driver}-containers/$CID/userdata/pidfile

   --pids-limit=limit
       Tune  the container's pids limit. Set to -1 to have unlimited pids for the container. The default is 2048
       on systems that support "pids" cgroup controller.

   --platform=OS/ARCH
       Specify the platform for selecting the image.  (Conflicts with --arch and --os) The --platform option can
       be used to override the current architecture and operating system.  Unless overridden, subsequent lookups
       of the same image in the local storage matches this platform, regardless of the host.

   --pod=name
       Run container in an existing pod. Podman makes the pod automatically if the pod  name  is  prefixed  with
       new:.   To  make  a  pod  with more granular options, use the podman pod create command before creating a
       container.  When a container is run with a pod with an infra-container, the  infra-container  is  started
       first.

   --pod-id-file=file
       Run  container in an existing pod and read the pod's ID from the specified file.  When a container is run
       within a pod which has an infra-container, the infra-container starts first.

   --preserve-fd=FD1[,FD2,...]
       Pass down to the process the additional file descriptors specified in the comma separated list.   It  can
       be  specified  multiple  times.   This option is only supported with the crun OCI runtime.  It might be a
       security risk to use this option with other OCI runtimes.

       (This option is not available with the remote Podman client, including Mac and Windows  (excluding  WSL2)
       machines)

   --preserve-fds=N
       Pass  down to the process N additional file descriptors (in addition to 0, 1, 2).  The total FDs are 3+N.
       (This option is not available with the remote Podman client, including Mac and Windows  (excluding  WSL2)
       machines)

   --privileged
       Give extended privileges to this container. The default is false.

       By  default,  Podman  containers  are  unprivileged (=false) and cannot, for example, modify parts of the
       operating system. This is because by default a container is only allowed limited  access  to  devices.  A
       "privileged"  container is given the same access to devices as the user launching the container, with the
       exception of virtual consoles (/dev/tty\d+) when running in systemd mode (--systemd=always).

       A privileged container turns off the security features that isolate the container from the host.  Dropped
       Capabilities,  limited  devices, read-only mount points, Apparmor/SELinux separation, and Seccomp filters
       are all disabled.  Due to the disabled security features, the privileged field should almost never be set
       as containers can easily break out of confinement.

       Containers  running  in a user namespace (e.g., rootless containers) cannot have more privileges than the
       user that launched them.

   --publish, -p=[[ip:][hostPort]:]containerPort[/protocol]
       Publish a container's port, or range of ports, to the host.

       Both hostPort and containerPort can be specified as a range of ports.  When specifying ranges  for  both,
       the number of container ports in the range must match the number of host ports in the range.

       If host IP is set to 0.0.0.0 or not set at all, the port is bound on all IPs on the host.

       By  default,  Podman publishes TCP ports. To publish a UDP port instead, give udp as protocol. To publish
       both TCP and UDP ports, set --publish twice,  with  tcp,  and  udp  as  protocols  respectively.  Rootful
       containers can also publish ports using the sctp protocol.

       Host  port does not have to be specified (e.g. podman run -p 127.0.0.1::80).  If it is not, the container
       port is randomly assigned a port on the host.

       Use podman port to see the actual mapping: podman port $CONTAINER $CONTAINERPORT.

       Note that the network drivers macvlan and ipvlan do not support port forwarding, it will have  no  effect
       on these networks.

       Note: If a container runs within a pod, it is not necessary to publish the port for the containers in the
       pod. The port must only be published by the pod itself. Pod network stacks act like the network stack  on
       the  host  -  meaning a variety of containers in the pod and programs in the container all share a single
       interface, IP address, and associated ports. If one container binds to a port, no other container can use
       that port within the pod while it is in use. Containers in the pod can also communicate over localhost by
       having one container bind to localhost in the pod, and another connect to that port.

   --publish-all, -P
       Publish all exposed ports to random ports on the host interfaces. The default is false.

       When set to true, publish all exposed ports to the host interfaces.  If the operator uses -P (or -p) then
       Podman  makes  the exposed port accessible on the host and the ports are available to any client that can
       reach the host.

       When using this option, Podman binds any exposed port to a random port on the host  within  an  ephemeral
       port range defined by /proc/sys/net/ipv4/ip_local_port_range.  To find the mapping between the host ports
       and the exposed ports, use podman port.

   --pull=policy
       Pull image policy. The default is missing.

              • always: Always pull the image and throw an error if the pull fails.

              • missing: Pull the image only when the image is not in the local containers  storage.   Throw  an
                error if no image is found and the pull fails.

              • never:  Never  pull the image but use the one from the local containers storage.  Throw an error
                if no image is found.

              • newer: Pull if the image on the registry is newer than the one in the local containers  storage.
                An image is considered to be newer when the digests are different.  Comparing the time stamps is
                prone to errors.  Pull errors are suppressed if a local image was found.

   --quiet, -q
       Suppress output information when pulling images

   --rdt-class=intel-rdt-class-of-service
       Rdt-class sets the class of service (CLOS or COS) for the  container  to  run  in.  Based  on  the  Cache
       Allocation  Technology  (CAT)  feature that is part of Intel's Resource Director Technology (RDT) feature
       set, all container processes will run within the pre-configured COS, representing a part  of  the  cache.
       The  COS has to be created and configured using a pseudo file system (usually mounted at /sys/fs/resctrl)
       that the resctrl kernel driver provides. Assigning the container to a COS requires  root  privileges  and
       thus  doesn't  work  in  a rootless environment. Currently, the feature is only supported using runc as a
       runtime. See ⟨https://docs.kernel.org/arch/x86/resctrl.html⟩ for more details on creating a COS before  a
       container can be assigned to it.

   --read-only
       Mount the container's root filesystem as read-only.

       By  default,  container  root  filesystems  are  writable, allowing processes to write files anywhere. By
       specifying the --read-only flag, the containers root filesystem are  mounted  read-only  prohibiting  any
       writes.

   --read-only-tmpfs
       When  running  --read-only  containers,  mount  a  read-write  tmpfs  on  /dev, /dev/shm, /run, /tmp, and
       /var/tmp. The default is true.

       ┌────────────┬───────────────────┬─────┬──────────────────────┐
       │--read-only--read-only-tmpfs//run, /tmp, /var/tmp │
       ├────────────┼───────────────────┼─────┼──────────────────────┤
       │true        │ true              │ r/o │ r/w                  │
       ├────────────┼───────────────────┼─────┼──────────────────────┤
       │true        │ false             │ r/o │ r/o                  │
       ├────────────┼───────────────────┼─────┼──────────────────────┤
       │false       │ false             │ r/w │ r/w                  │
       ├────────────┼───────────────────┼─────┼──────────────────────┤
       │false       │ true              │ r/w │ r/w                  │
       └────────────┴───────────────────┴─────┴──────────────────────┘

       When --read-only=true and --read-only-tmpfs=true additional tmpfs are mounted  on  the  /tmp,  /run,  and
       /var/tmp directories.

       When --read-only=true and --read-only-tmpfs=false /dev and /dev/shm are marked Read/Only and no tmpfs are
       mounted on /tmp, /run and /var/tmp. The directories are exposed from the underlying image,  meaning  they
       are  read-only  by  default.   This  makes the container totally read-only. No writable directories exist
       within the container. In this mode writable directories need to be added via external volumes or mounts.

       By default, when --read-only=false, the /dev and  /dev/shm  are  read/write,  and  the  /tmp,  /run,  and
       /var/tmp are read/write directories from the container image.

   --replace
       If another container with the same name already exists, replace and remove it. The default is false.

   --requires=container
       Specify  one  or  more requirements.  A requirement is a dependency container that is started before this
       container.  Containers can be specified by name or  ID,  with  multiple  containers  being  separated  by
       commas.

   --restart=policy
       Restart  policy  to  follow  when containers exit.  Restart policy does not take effect if a container is
       stopped via the podman kill or podman stop commands.

       Valid policy values are:

              • no                       : Do not restart containers on exit

              • never                    : Synonym for no; do not restart containers on exit

              • on-failure[:max_retries] : Restart containers when they exit with a non-zero exit code, retrying
                indefinitely or until the optional max_retries count is hit

              • always                    :  Restart  containers  when they exit, regardless of status, retrying
                indefinitely

              • unless-stopped           : Identical to always

       Podman provides a systemd unit file, podman-restart.service, which restarts  containers  after  a  system
       reboot.

       When running containers in systemd services, use the restart functionality provided by systemd.  In other
       words, do not use this option in a container unit, instead set the  Restart=  systemd  directive  in  the
       [Service] section.  See podman-systemd.unit(5) and systemd.service(5).

   --retry=attempts
       Number  of  times  to  retry  pulling or pushing images between the registry and local storage in case of
       failure. Default is 3.

   --retry-delay=duration
       Duration of delay between retry attempts when pulling or pushing images between the  registry  and  local
       storage  in  case of failure. The default is to start at two seconds and then exponentially back off. The
       delay is used when this value is set, and no exponential back off occurs.

   --rm
       Automatically remove the container and any anonymous unnamed volume associated with the container when it
       exits. The default is false.

   --rmi
       After  exit  of the container, remove the image unless another container is using it. Implies --rm on the
       new container. The default is false.

   --rootfs
       If specified, the first argument refers to an exploded container on the file system.

       This is useful to run a container without requiring any image management, the rootfs of the container  is
       assumed to be managed externally.

       Overlay Rootfs Mounts

       The  :O  flag  tells Podman to mount the directory from the rootfs path as storage using the overlay file
       system. The container processes can modify content  within  the  mount  point  which  is  stored  in  the
       container  storage  in a separate directory. In overlay terms, the source directory is the lower, and the
       container storage directory is the upper. Modifications  to  the  mount  point  are  destroyed  when  the
       container finishes executing, similar to a tmpfs mount point being unmounted.

       Note:   On   SELinux   systems,   the   rootfs   needs   the   correct   label,   which   is  by  default
       unconfined_u:object_r:container_file_t:s0.

       idmap

       If idmap is specified, create an idmapped mount to the target user namespace in the container.  The idmap
       option  supports  a  custom  mapping that can be different than the user namespace used by the container.
       The mapping can be specified after the idmap option like: idmap=uids=0-1-10#10-11-10;gids=0-100-10.   For
       each  triplet,  the first value is the start of the backing file system IDs that are mapped to the second
       value on the host.  The length of this mapping  is  given  in  the  third  value.   Multiple  ranges  are
       separated with #.

   --sdnotify=container | conmon | healthy | ignore
       Determines how to use the NOTIFY_SOCKET, as passed with systemd and Type=notify.

       Default is container, which means allow the OCI runtime to proxy the socket into the container to receive
       ready notification. Podman sets the MAINPID to conmon's pid.  The conmon option sets MAINPID to  conmon's
       pid,  and  sends  READY  when the container has started. The socket is never passed to the runtime or the
       container.  The healthy option sets MAINPID to conmon's pid, and  sends  READY  when  the  container  has
       turned  healthy;  requires  a  healthcheck  to  be  set. The socket is never passed to the runtime or the
       container.  The ignore option removes NOTIFY_SOCKET from the environment for itself and child  processes,
       for the case where some other process above Podman uses NOTIFY_SOCKET and Podman does not use it.

   --seccomp-policy=policy
       Specify   the   policy   to   select   the  seccomp  profile.  If  set  to  image,  Podman  looks  for  a
       "io.containers.seccomp.profile" label in the container-image config  and  use  its  value  as  a  seccomp
       profile.  Otherwise,  Podman  follows the default policy by applying the default profile unless specified
       otherwise via --security-opt seccomp as described below.

       Note that this feature is experimental and may change in the future.

   --secret=secret[,opt=opt ...]
       Give the container access to a secret. Can be specified multiple times.

       A secret is a blob of sensitive data which a container needs at runtime but is not stored in the image or
       in  source  control,  such  as  usernames  and  passwords,  TLS  certificates and keys, SSH keys or other
       important generic strings or binary content (up to 500 kb in size).

       When secrets are specified as type mount, the secrets are copied and mounted into the  container  when  a
       container  is  created.   When  secrets  are  specified  as type env, the secret is set as an environment
       variable within the container.  Secrets are written in the container at the time of  container  creation,
       and  modifying  the secret using podman secret commands after the container is created affects the secret
       inside the container.

       Secrets and its storage are managed using the podman secret command.

       Secret Options

              • type=mount|env    : How the secret is exposed to the container.
                                    mount mounts the secret into the container as a file.
                                    env exposes the secret as an environment variable.
                                    Defaults to mount.

              • target=target     : Target of secret.
                                    For mounted secrets, this is the path to the secret inside the container.
                                    If a fully qualified path  is  provided,  the  secret  is  mounted  at  that
                location.
                                    Otherwise, the secret is mounted to
                                    /run/secrets/target for linux containers or
                                    /var/run/secrets/target for freebsd containers.
                                    If  the  target is not set, the secret is mounted to /run/secrets/secretname
                by default.
                                    For  env  secrets,  this  is  the  environment  variable  key.  Defaults  to
                secretname.

              • uid=0             : UID of secret. Defaults to 0. Mount secret type only.

              • gid=0             : GID of secret. Defaults to 0. Mount secret type only.

              • mode=0            : Mode of secret. Defaults to 0444. Mount secret type only.

       Examples

       Mount at /my/location/mysecret with UID 1:

       --secret mysecret,target=/my/location/mysecret,uid=1

       Mount at /run/secrets/customtarget with mode 0777:

       --secret mysecret,target=customtarget,mode=0777

       Create a secret environment variable called ENVSEC:

       --secret mysecret,type=env,target=ENVSEC

   --security-opt=option
       Security Options

              • apparmor=unconfined : Turn off apparmor confinement for the container

              • apparmor=alternate-profile : Set the apparmor confinement profile for the container

              • label=user:USER: Set the label user for the container processes

              • label=role:ROLE: Set the label role for the container processes

              • label=type:TYPE: Set the label process type for the container processes

              • label=level:LEVEL: Set the label level for the container processes

              • label=filetype:TYPE: Set the label file type for the container files

              • label=disable: Turn off label separation for the container

       Note:  Labeling  can  be  disabled  for  all  containers  by  setting  label=false in the containers.conf
       (/etc/containers/containers.conf or $HOME/.config/containers/containers.conf) file.

              • label=nested: Allows SELinux modifications within  the  container.  Containers  are  allowed  to
                modify  SELinux labels on files and processes, as long as SELinux policy allows. Without nested,
                containers view SELinux as disabled, even when  it  is  enabled  on  the  host.  Containers  are
                prevented from setting any labels.

              • mask=/path/1:/path/2:  The  paths to mask separated by a colon. A masked path cannot be accessed
                inside the container.

              • no-new-privileges: Disable container processes from gaining additional privileges.

              • seccomp=unconfined: Turn off seccomp confinement for the container.

              • seccomp=profile.json:  JSON  file  to  be  used   as   a   seccomp   filter.   Note   that   the
                io.podman.annotations.seccomp  annotation  is  set  with  the specified value as shown in podman
                inspect.

              • proc-opts=OPTIONS : Comma-separated list of options to use for the /proc mount. More details for
                the possible mount options are specified in the proc(5) man page.

              • unmask=ALL or /path/1:/path/2, or shell expanded paths (/proc/*): Paths to unmask separated by a
                colon. If set to ALL, it unmasks all the paths that are masked or  made  read-only  by  default.
                The   default   masked  paths  are  /proc/acpi,  /proc/kcore,  /proc/keys,  /proc/latency_stats,
                /proc/sched_debug,   /proc/scsi,   /proc/timer_list,   /proc/timer_stats,   /sys/firmware,   and
                /sys/fs/selinux,  /sys/devices/virtual/powercap.   The  default  paths  that  are  read-only are
                /proc/asound, /proc/bus, /proc/fs, /proc/irq, /proc/sys, /proc/sysrq-trigger, /sys/fs/cgroup.

       Note: Labeling can be disabled for all containers by setting label=false in the containers.conf(5) file.

   --shm-size=number[unit]
       Size of /dev/shm. A unit can be b (bytes), k (kibibytes), m (mebibytes), or g (gibibytes).  If  the  unit
       is  omitted, the system uses bytes. If the size is omitted, the default is 64m.  When size is 0, there is
       no limit on the amount of memory used for IPC by the container.  This option conflicts with --ipc=host.

   --shm-size-systemd=number[unit]
       Size of systemd-specific tmpfs mounts such as /run, /run/lock, /var/log/journal and /tmp.  A unit can  be
       b  (bytes),  k  (kibibytes),  m  (mebibytes),  or g (gibibytes).  If the unit is omitted, the system uses
       bytes. If the size is omitted, the default is 64m.  When size is 0, the usage is limited to  50%  of  the
       host's available memory.

   --sig-proxy
       Proxy received signals to the container process. SIGCHLD, SIGURG, SIGSTOP, and SIGKILL are not proxied.

       The default is true.

   --stop-signal=signal
       Signal to stop a container. Default is SIGTERM.

   --stop-timeout=seconds
       Timeout to stop a container. Default is 10.  Remote connections use local containers.conf for defaults.

   --subgidname=name
       Run  the  container  in a new user namespace using the map with name in the /etc/subgid file.  If running
       rootless, the user needs to have the right to use the mapping. See subgid(5).  This flag  conflicts  with
       --userns and --gidmap.

   --subuidname=name
       Run  the  container  in a new user namespace using the map with name in the /etc/subuid file.  If running
       rootless, the user needs to have the right to use the mapping. See subuid(5).  This flag  conflicts  with
       --userns and --uidmap.

   --sysctl=name=value
       Configure namespaced kernel parameters at runtime.

       For the IPC namespace, the following sysctls are allowed:

              • kernel.msgmax

              • kernel.msgmnb

              • kernel.msgmni

              • kernel.sem

              • kernel.shmall

              • kernel.shmmax

              • kernel.shmmni

              • kernel.shm_rmid_forced

              • Sysctls beginning with fs.mqueue.*

       Note: if using the --ipc=host option, the above sysctls are not allowed.

       For the network namespace, only sysctls beginning with net.* are allowed.

       Note: if using the --network=host option, the above sysctls are not allowed.

   --systemd=true | false | always
       Run container in systemd mode. The default is true.

              • true  enables  systemd  mode  only  when  the  command executed inside the container is systemd,
                /usr/sbin/init, /sbin/init or /usr/local/sbin/init.

              • false disables systemd mode.

              • always enforces the systemd mode to be enabled.

       Running the container in systemd mode causes the following changes:

              • Podman mounts tmpfs file systems on the following directories

                • /run/run/lock/tmp/sys/fs/cgroup/systemd (on a cgroup v1 system)

                • /var/lib/journal

              • Podman sets the default stop signal to SIGRTMIN+3.

              • Podman sets container_uuid environment variable in the container to the first 32  characters  of
                the container ID.

              • Podman does not mount virtual consoles (/dev/tty\d+) when running with --privileged.

              • On cgroup v2, /sys/fs/cgroup is mounted writeable.

       This allows systemd to run in a confined container without any modifications.

       Note  that on SELinux systems, systemd attempts to write to the cgroup file system. Containers writing to
       the cgroup file system are denied by default.  The container_manage_cgroup boolean must  be  enabled  for
       this to be allowed on an SELinux separated system.

       setsebool -P container_manage_cgroup true

   --timeout=seconds
       Maximum time a container is allowed to run before conmon sends it the kill signal.  By default containers
       run until they exit or are stopped by podman stop.

   --tls-verify
       Require HTTPS and verify certificates when contacting registries (default: true).  If explicitly  set  to
       true,  TLS  verification  is used.  If set to false, TLS verification is not used.  If not specified, TLS
       verification is used unless the target  registry  is  listed  as  an  insecure  registry  in  containers-
       registries.conf(5)

   --tmpfs=fs
       Create a tmpfs mount.

       Mount a temporary filesystem (tmpfs) mount into a container, for example:

       $ podman run -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image

       This command mounts a tmpfs at /tmp within the container. The supported mount options are the same as the
       Linux default mount flags.  If  no  options  are  specified,  the  system  uses  the  following  options:
       rw,noexec,nosuid,nodev.

   --tty, -t
       Allocate a pseudo-TTY. The default is false.

       When  set  to true, Podman allocates a pseudo-tty and attach to the standard input of the container. This
       can be used, for example, to run a throwaway interactive shell.

       NOTE: The --tty flag prevents redirection of standard output.  It combines  STDOUT  and  STDERR,  it  can
       insert  control  characters,  and it can hang pipes. This option is only used when run interactively in a
       terminal. When feeding input to Podman, use -i only, not -it.

       echo "asdf" | podman run --rm -i someimage /bin/cat

   --tz=timezone
       Set timezone in container. This flag takes area-based timezones, GMT time, as well as local,  which  sets
       the  timezone  in  the container to match the host machine. See /usr/share/zoneinfo/ for valid timezones.
       Remote connections use local containers.conf for defaults

   --uidmap=[flags]container_uid:from_uid[:amount]
       Run the container in a new user namespace using the supplied UID mapping. This option conflicts with  the
       --userns  and --subuidname options. This option provides a way to map host UIDs to container UIDs. It can
       be passed several times to map different ranges.

       The possible values of the optional flags are discussed further down on this page.  The amount  value  is
       optional and assumed to be 1 if not given.

       The from_uid value is based upon the user running the command, either rootful or rootless users.

              • rootful user:  [flags]container_uid:host_uid[:amount]

              • rootless user: [flags]container_uid:intermediate_uid[:amount]

       Rootful mappings

       When  podman  run  is  called by a privileged user, the option --uidmap works as a direct mapping between
       host UIDs and container UIDs.

       host UID -> container UID

       The amount specifies the number of consecutive UIDs that is mapped.  If  for  example  amount  is  4  the
       mapping looks like:

       ┌─────────────┬───────────────────┐
       │host UIDcontainer UID     │
       ├─────────────┼───────────────────┤
       │from_uidcontainer_uid     │
       ├─────────────┼───────────────────┤
       │from_uid + 1 │ container_uid + 1 │
       ├─────────────┼───────────────────┤
       │from_uid + 2 │ container_uid + 2 │
       ├─────────────┼───────────────────┤
       │from_uid + 3 │ container_uid + 3 │
       └─────────────┴───────────────────┘

       Rootless mappings

       When  podman  run  is  called  by  an  unprivileged  user  (i.e. running rootless), the value from_uid is
       interpreted as an "intermediate UID". In the  rootless  case,  host  UIDs  are  not  mapped  directly  to
       container UIDs. Instead the mapping happens over two mapping steps:

       host UID -> intermediate UID -> container UID

       The --uidmap option only influences the second mapping step.

       The  first mapping step is derived by Podman from the contents of the file /etc/subuid and the UID of the
       user calling Podman.

       First mapping step:

       ┌────────────────────┬──────────────────┐
       │host UIDintermediate UID │
       ├────────────────────┼──────────────────┤
       │UID for Podman user │ 0                │
       ├────────────────────┼──────────────────┤
       │1st subordinate UID │ 1                │
       ├────────────────────┼──────────────────┤
       │2nd subordinate UID │ 2                │
       ├────────────────────┼──────────────────┤
       │3rd subordinate UID │ 3                │
       ├────────────────────┼──────────────────┤
       │nth subordinate UID │ n                │
       └────────────────────┴──────────────────┘

       To be able to use intermediate UIDs greater than zero, the user needs to have subordinate UIDs configured
       in /etc/subuid. See subuid(5).

       The second mapping step is configured with --uidmap.

       If for example amount is 5 the second mapping step looks like:

       ┌─────────────────┬───────────────────┐
       │intermediate UIDcontainer UID     │
       ├─────────────────┼───────────────────┤
       │from_uidcontainer_uid     │
       ├─────────────────┼───────────────────┤
       │from_uid + 1     │ container_uid + 1 │
       ├─────────────────┼───────────────────┤
       │from_uid + 2     │ container_uid + 2 │
       ├─────────────────┼───────────────────┤
       │from_uid + 3     │ container_uid + 3 │
       ├─────────────────┼───────────────────┤
       │from_uid + 4     │ container_uid + 4 │
       └─────────────────┴───────────────────┘

       When running as rootless, Podman uses all the ranges configured in the /etc/subuid file.

       The  current  user ID is mapped to UID=0 in the rootless user namespace.  Every additional range is added
       sequentially afterward:

       ┌──────────────────────┬─────────────────────────┬──────────────────────┐
       │hostrootless user namespacelength               │
       ├──────────────────────┼─────────────────────────┼──────────────────────┤
       │$UID                  │ 0                       │ 1                    │
       ├──────────────────────┼─────────────────────────┼──────────────────────┤
       │1                     │ $FIRST_RANGE_ID         │ $FIRST_RANGE_LENGTH  │
       ├──────────────────────┼─────────────────────────┼──────────────────────┤
       │1+$FIRST_RANGE_LENGTH │ $SECOND_RANGE_ID        │ $SECOND_RANGE_LENGTH │
       └──────────────────────┴─────────────────────────┴──────────────────────┘

       Referencing a host ID from the parent namespace

       As a rootless user, the given host ID in --uidmap or --gidmap is mapped from the  intermediate  namespace
       generated by Podman. Sometimes it is desirable to refer directly at the host namespace. It is possible to
       manually do so, by running podman unshare cat /proc/self/gid_map, finding the  desired  host  id  at  the
       second column of the output, and getting the corresponding intermediate id from the first column.

       Podman  can  perform all that by preceding the host id in the mapping with the @ symbol. For instance, by
       specifying --gidmap 100000:@2000:1, podman will look up the intermediate id corresponding to host id 2000
       and  it  will  map the found intermediate id to the container id 100000. The given host id must have been
       subordinated (otherwise it would not be mapped into the intermediate space in the first place).

       If the length is greater than one, for instance with --gidmap 100000:@2000:2, Podman will  map  host  ids
       2000 and 2001 to 100000 and 100001, respectively, regardless of how the intermediate mapping is defined.

       Extending previous mappings

       Some  mapping  modifications  may  be  cumbersome.  For  instance,  a  user starts with a mapping such as
       --gidmap="0:0:65000", that needs to be changed such as the parent id  1000  is  mapped  to  container  id
       100000  instead,  leaving  container id 1 unassigned. The corresponding --gidmap becomes --gidmap="0:0:1"
       --gidmap="2:2:65534" --gidmap="100000:1:1".

       This notation can be simplified using the + flag, that takes care of breaking previous mappings  removing
       any  conflicting assignment with the given mapping. The flag is given before the container id as follows:
       --gidmap="0:0:65000" --gidmap="+100000:1:1"

       ┌─────┬─────────────┬─────────────────────────────┐
       │FlagExampleDescription                 │
       ├─────┼─────────────┼─────────────────────────────┤
       │++100000:1:1 │ Extend the previous mapping │
       └─────┴─────────────┴─────────────────────────────┘

       This notation leads to gaps in the assignment, so it may be convenient to  fill  those  gaps  afterwards:
       --gidmap="0:0:65000" --gidmap="+100000:1:1" --gidmap="1:65001:1"

       One  specific  use  case  for  this flag is in the context of rootless users. A rootless user may specify
       mappings with the + flag as in --gidmap="+100000:1:1". Podman will then "fill  the  gaps"  starting  from
       zero  with  all  the  remaining  intermediate ids. This is convenient when a user wants to map a specific
       intermediate id to a container id, leaving the rest of subordinate ids to be mapped by Podman at will.

       Passing only one of --uidmap or --gidmap

       Usually, subordinated user and group ids are assigned simultaneously, and for any user  the  subordinated
       user  ids  match  the  subordinated  group  ids.  For convenience, if only one of --uidmap or --gidmap is
       given, podman assumes the mapping refers to both UIDs and GIDs and applies the given mapping to both.  If
       only  one  value  of  the  two  needs  to be changed, the mappings should include the u or the g flags to
       specify that they only apply to UIDs or GIDs and should not be copied over.

       ┌─────┬───────────────┬──────────────────────────────┐
       │flagExampleDescription                  │
       ├─────┼───────────────┼──────────────────────────────┤
       │uu20000:2000:1 │ The mapping only applies  to │
       │     │               │ UIDs                         │
       ├─────┼───────────────┼──────────────────────────────┤
       │gg10000:1000:1 │ The  mapping only applies to │
       │     │               │ GIDs                         │
       └─────┴───────────────┴──────────────────────────────┘

       For instance given the command

       podman run --gidmap "0:0:1000" --gidmap "g2000:2000:1"

       Since no --uidmap is given, the --gidmap is copied to --uidmap, giving a command equivalent to

       podman run --gidmap "0:0:1000" --gidmap "2000:2000:1" --uidmap "0:0:1000"

       The --gidmap "g2000:2000:1" used the g flag and therefore it was not copied to --uidmap.

       Rootless mapping of additional host GIDs

       A rootless user may desire to map a specific  host  group  that  has  already  been  subordinated  within
       /etc/subgid without specifying the rest of the mapping.

       This can be done with --gidmap "+gcontainer_gid:@host_gid"

       Where:

              • The host GID is given through the @ symbol

              • The mapping of this GID is not copied over to --usermap thanks to the g flag.

              • The  rest  of  the  container  IDs  will  be mapped starting from 0 to n, with all the remaining
                subordinated GIDs, thanks to the + flag.

       For instance, if a user belongs to the group 2000 and that group  is  subordinated  to  that  user  (with
       usermod   --add-subgids  2000-2000  $USER),  the  user  can  map  the  group  into  the  container  with:
       --gidmap=+g100000:@2000.

       If this mapping is combined with the option, --group-add=keep-groups, the process in the  container  will
       belong to group 100000, and files belonging to group 2000 in the host will appear as being owned by group
       100000 inside the container.

       podman run --group-add=keep-groups --gidmap="+g100000:@2000" ...

       No subordinate UIDs

       Even if a user does not have any subordinate UIDs in  /etc/subuid, --uidmap can be used to map the normal
       UID  of  the  user  to  a  container  UID  by  running  podman  run  --uidmap  $container_uid:0:1  --user
       $container_uid ....

       Pods

       The --uidmap option cannot be called in conjunction with the --pod option as a uidmap cannot  be  set  on
       the container level when in a pod.

   --ulimit=option
       Ulimit options. Sets the ulimits values inside of the container.

       --ulimit with a soft and hard limit in the format =[:]. For example:

       $ podman run --ulimit nofile=1024:1024 --rm ubi9 ulimit -n 1024

       Set  -1  for  the  soft  or  hard  limit to set the limit to the maximum limit of the current process. In
       rootful mode this is often unlimited.

       If nofile and nproc  are  unset,  a  default  value  of  1048576  will  be  used,  unless  overridden  in
       containers.conf(5).   However, if the default value exceeds the hard limit for the current rootless user,
       the current hard limit will be applied instead.

       Use host to copy the current configuration from the host.

       Don't use nproc with the ulimit flag as Linux uses nproc to set the maximum number of processes available
       to a user, not to a container.

       Use  the  --pids-limit  option  to  modify  the  cgroup control to limit the number of processes within a
       container.

   --umask=umask
       Set the umask inside the container. Defaults to 0022.  Remote connections use local  containers.conf  for
       defaults

   --unsetenv=env
       Unset  default  environment  variables for the container. Default environment variables include variables
       provided natively by Podman, environment variables configured by the  image,  and  environment  variables
       from containers.conf.

   --unsetenv-all
       Unset  all  default  environment  variables  for  the  container.  Default  environment variables include
       variables provided natively by Podman, environment variables configured by  the  image,  and  environment
       variables from containers.conf.

   --user, -u=user[:group]
       Sets  the username or UID used and, optionally, the groupname or GID for the specified command. Both user
       and group may be symbolic or numeric.

       Without this argument, the command runs as the user specified in the container image.  Unless  overridden
       by  a USER command in the Containerfile or by a value passed to this option, this user generally defaults
       to root.

       When a user namespace is not in use, the UID and GID used within the container and  on  the  host  match.
       When  user namespaces are in use, however, the UID and GID in the container may correspond to another UID
       and GID on the host. In rootless containers, for example, a user namespace is always used,  and  root  in
       the container by default corresponds to the UID and GID of the user invoking Podman.

   --userns=mode
       Set the user namespace mode for the container.

       If  --userns  is  not  set,  the  default value is determined as follows.  - If --pod is set, --userns is
       ignored and the user namespace of the pod is used.  - If the environment variable  PODMAN_USERNS  is  set
       its  value  is  used.   -  If  userns  is  specified in containers.conf this value is used.  - Otherwise,
       --userns=host is assumed.

       --userns="" (i.e., an empty string) is an alias for --userns=host.

       This option is incompatible with --gidmap, --uidmap, --subuidname and --subgidname.

       Rootless user --userns=Key mappings:

       ┌────────────────────────┬───────────┬──────────────────────────────┐
       │KeyHost UserContainer User               │
       ├────────────────────────┼───────────┼──────────────────────────────┤
       │auto                    │ $UID      │ nil (Host User  UID  is  not │
       │                        │           │ mapped into container.)      │
       ├────────────────────────┼───────────┼──────────────────────────────┤
       │host                    │ $UID      │ 0   (Default   User  account │
       │                        │           │ mapped  to  root   user   in │
       │                        │           │ container.)                  │
       ├────────────────────────┼───────────┼──────────────────────────────┤
       │keep-id                 │ $UID      │ $UID  (Map  user  account to │
       │                        │           │ same UID within container.)  │
       ├────────────────────────┼───────────┼──────────────────────────────┤
       │keep-id:uid=200,gid=210 │ $UID      │ 200:210 (Map user account to │
       │                        │           │ specified   UID,  GID  value │
       │                        │           │ within container.)           │
       ├────────────────────────┼───────────┼──────────────────────────────┤
       │nomap                   │ $UID      │ nil (Host User  UID  is  not │
       │                        │           │ mapped into container.)      │
       └────────────────────────┴───────────┴──────────────────────────────┘

       Valid mode values are:

       auto[:OPTIONS,...]: automatically create a unique user namespace.

              • rootful  mode: The --userns=auto flag requires that the user name containers be specified in the
                /etc/subuid and /etc/subgid files, with an unused range of  subordinate  user  IDs  that  Podman
                containers are allowed to allocate.

                                  Example: containers:2147483647:2147483648.

              • rootless  mode:  The  users  range from the /etc/subuid and /etc/subgid files will be used. Note
                running a single container without using --userns=auto will use the entire range of UIDs and not
                allow further subdividing. See subuid(5).

       Podman allocates unique ranges of UIDs and GIDs from the containers subordinate user IDs. The size of the
       ranges is based on the number of UIDs required in  the  image.  The  number  of  UIDs  and  GIDs  can  be
       overridden with the size option.

       The option --userns=keep-id uses all the subuids and subgids of the user.  The option --userns=nomap uses
       all the subuids and subgids of the user except the user's own ID.  Using --userns=auto when starting  new
       containers  does  not  work  as  long  as  any  containers exist that were started with --userns=nomap or
       --userns=keep-id without limiting the user namespace size.

       Valid auto options:

              • gidmapping=CONTAINER_GID:HOST_GID:SIZE: to force a  GID  mapping  to  be  present  in  the  user
                namespace.

              • size=SIZE:   to   specify   an   explicit   size   for   the   automatic  user  namespace.  e.g.
                --userns=auto:size=8192. If size is not specified, auto estimates a size for the user namespace.

              • uidmapping=CONTAINER_UID:HOST_UID:SIZE: to force a  UID  mapping  to  be  present  in  the  user
                namespace.

       The  host UID and GID in gidmapping and uidmapping can optionally be prefixed with the @ symbol.  In this
       case, podman will look up the intermediate ID corresponding  to  host  ID  and  it  will  map  the  found
       intermediate ID to the container id.  For details see --uidmap.

       container:id: join the user namespace of the specified container.

       host  or  ""  (empty  string):  run  in  the  user  namespace of the caller. The processes running in the
       container have the same privileges on the host as any other process launched by the calling user.

       keep-id: creates a user namespace where the current user's UID:GID are mapped to the same values  in  the
       container. For containers created by root, the current mapping is created into a new user namespace.

       Valid keep-id options:

              • uid=UID: override the UID inside the container that is used to map the current user to.

              • gid=GID: override the GID inside the container that is used to map the current user to.

              • size=SIZE: override the size of the configured user namespace.  It is useful to not saturate all
                the available IDs.  Not supported when running as root.

       nomap: creates a user namespace where the current  rootless  user's  UID:GID  are  not  mapped  into  the
       container. This option is not allowed for containers created by the root user.

       ns:namespace: run the container in the given existing user namespace.

   --uts=mode
       Set the UTS namespace mode for the container. The following values are supported:

              • host: use the host's UTS namespace inside the container.

              • private: create a new namespace for the container (default).

              • ns:[path]: run the container in the given existing UTS namespace.

              • container:[container]: join the UTS namespace of the specified container.

   --variant=VARIANT
       Use  VARIANT  instead  of  the  default  architecture variant of the container image. Some images can use
       multiple variants of the arm architectures, such as arm/v5 and arm/v7.

   --volume, -v=[[SOURCE-VOLUME|HOST-DIR:]CONTAINER-DIR[:OPTIONS]]
       Create a bind mount. If -v /HOST-DIR:/CONTAINER-DIR is specified, Podman bind mounts /HOST-DIR  from  the
       host  into  /CONTAINER-DIR in the Podman container. Similarly, -v SOURCE-VOLUME:/CONTAINER-DIR mounts the
       named volume from the host into the container. If no such named volume exists, Podman creates one. If  no
       source is given, the volume is created as an anonymously named volume with a randomly generated name, and
       is removed when the container is removed via the --rm flag or the podman rm --volumes command.

       (Note when using the remote client, including Mac and Windows (excluding WSL2) machines, the volumes  are
       mounted from the remote server, not necessarily the client machine.)

       The OPTIONS is a comma-separated list and can be one or more of:

              • rw|roz|Z

              • [O]

              • [U]

              • [no]copy

              • [no]dev

              • [no]exec

              • [no]suid

              • [r]bind

              • [r]shared|[r]slave|[r]private[r]unbindable [1] ⟨#Footnote1⟩

              • idmap[=options]

       The CONTAINER-DIR must be an absolute path such as /src/docs. The volume is mounted into the container at
       this directory.

       If a volume source is specified, it must be a path on the host or the name of a named volume. Host  paths
       are  allowed  to be absolute or relative; relative paths are resolved relative to the directory Podman is
       run in. If the source does not exist, Podman returns an error. Users must pre-create the source files  or
       directories.

       Any  source  that does not begin with a . or / is treated as the name of a named volume. If a volume with
       that name does not exist, it is created.  Volumes created with names are not anonymous, and they are  not
       removed by the --rm option and the podman rm --volumes command.

       Specify multiple -v options to mount one or more volumes into a container.

       Write Protected Volume Mounts

       Add  :ro  or  :rw option to mount a volume in read-only or read-write mode, respectively. By default, the
       volumes are mounted read-write.  See examples.

       Chowning Volume Mounts

       By default, Podman does not change the  owner  and  group  of  source  volume  directories  mounted  into
       containers.  If  a  container  is  created  in a new user namespace, the UID and GID in the container may
       correspond to another UID and GID on the host.

       The :U suffix tells Podman to use the correct host UID and GID based  on  the  UID  and  GID  within  the
       container, to change recursively the owner and group of the source volume. Chowning walks the file system
       under the volume and changes the UID/GID on each file. If  the  volume  has  thousands  of  inodes,  this
       process takes a long time, delaying the start of the container.

       Warning use with caution since this modifies the host filesystem.

       Labeling Volume Mounts

       Labeling  systems  like  SELinux  require  that proper labels are placed on volume content mounted into a
       container. Without a label, the security system might prevent the processes running inside the  container
       from using the content. By default, Podman does not change the labels set by the OS.

       To  change  a  label  in  the container context, add either of two suffixes :z or :Z to the volume mount.
       These suffixes tell Podman to relabel file objects on the shared volumes. The z option tells Podman  that
       two  or  more  containers  share the volume content. As a result, Podman labels the content with a shared
       content label. Shared volume labels allow all containers to read/write content. The Z option tells Podman
       to  label  the content with a private unshared label Only the current container can use a private volume.
       Note: all containers within a pod share the same SELinux label. This means all containers within said pod
       can  read/write  volumes  shared  into  the  container  created with the :Z on any of one the containers.
       Relabeling walks the file system under the volume and changes the label on each file, if the  volume  has
       thousands  of  inodes, this process takes a long time, delaying the start of the container. If the volume
       was previously relabeled with the z option, Podman is optimized to not relabel a second  time.  If  files
       are  moved  into  the  volume, then the labels can be manually change with the chcon -Rt container_file_t
       PATH command.

       Note: Do not relabel system files and directories. Relabeling system content might cause  other  confined
       services  on  the  machine  to  fail.   For  these  types  of  containers  we recommend disabling SELinux
       separation.  The option --security-opt label=disable disables SELinux separation for the container.   For
       example  if  a  user  wanted  to  volume mount their entire home directory into a container, they need to
       disable SELinux separation.

       $ podman run --security-opt label=disable -v $HOME:/home/user fedora touch /home/user/file

       Overlay Volume Mounts

       The :O flag tells Podman to mount the directory from the host as a temporary storage  using  the  overlay
       file  system.  The  container  processes  can modify content within the mountpoint which is stored in the
       container storage in a separate directory. In overlay terms, the source directory is the lower,  and  the
       container  storage  directory  is  the  upper.  Modifications  to  the mount point are destroyed when the
       container finishes executing, similar to a tmpfs mount point being unmounted.

       For advanced users, the overlay option also supports custom non-volatile upperdir  and  workdir  for  the
       overlay  mount. Custom upperdir and workdir can be fully managed by the users themselves, and Podman does
       not remove it on lifecycle completion.  Example :O,upperdir=/some/upper,workdir=/some/work

       Subsequent executions of the container sees the original  source  directory  content,  any  changes  from
       previous container executions no longer exist.

       One  use case of the overlay mount is sharing the package cache from the host into the container to allow
       speeding up builds.

       Note: The O flag conflicts with other options listed above.

       Content mounted into the container is labeled with the private label.  On SELinux systems, labels in  the
       source  directory  must  be  readable  by  the   container  label.  Usually  containers  can read/execute
       container_share_t and can read/write container_file_t. If unable to change the labels on a source volume,
       SELinux container separation must be disabled for the  container to work.

       Do  not  modify  the  source  directory  mounted  into  the container with an overlay mount, it can cause
       unexpected failures. Only modify the directory after the container finishes running.

       Mounts propagation

       By default, bind-mounted volumes are private. That means any mounts done inside  the  container  are  not
       visible  on  the  host  and  vice  versa.   One  can  change  this  behavior by specifying a volume mount
       propagation property.  When a volume is shared, mounts done under that volume inside  the  container  are
       visible  on  host  and  vice  versa.  Making  a  volume  slave[1] ⟨#Footnote1⟩ enables only one-way mount
       propagation: mounts done on the host under that volume are visible inside the container but not the other
       way around.

       To  control mount propagation property of a volume one can use the [r]shared, [r]slave, [r]private or the
       [r]unbindable propagation flag.  Propagation property can be specified only for bind mounted volumes  and
       not  for  internal  volumes  or  named volumes. For mount propagation to work the source mount point (the
       mount point where source dir is mounted on) has to have the  right  propagation  properties.  For  shared
       volumes, the source mount point has to be shared. And for slave volumes, the source mount point has to be
       either shared or slave.  [1] ⟨#Footnote1⟩

       To recursively mount a volume and all of its submounts into a container, use the rbind option. By default
       the bind option is used, and submounts of the source directory is not mounted into the container.

       Mounting  the  volume  with  a  copy  option tells podman to copy content from the underlying destination
       directory onto newly created internal volumes. The copy only happens  on  the  initial  creation  of  the
       volume.  Content  is not copied up when the volume is subsequently used on different containers. The copy
       option is ignored on bind mounts and has no effect.

       Mounting volumes with the nosuid options means that SUID executables on the volume can  not  be  used  by
       applications to change their privilege. By default volumes are mounted with nosuid.

       Mounting the volume with the noexec option means that no executables on the volume can be executed within
       the container.

       Mounting the volume with the nodev option means that no devices on the volume can be  used  by  processes
       within the container. By default volumes are mounted with nodev.

       If the HOST-DIR is a mount point, then dev, suid, and exec options are ignored by the kernel.

       Use  df  HOST-DIR to figure out the source mount, then use findmnt -o TARGET,PROPAGATION source-mount-dir
       to figure out propagation properties of source mount. If findmnt(1) utility is not  available,  then  one
       can  look  at  the  mount entry for the source mount point in /proc/self/mountinfo. Look at the "optional
       fields" and see if any propagation properties are specified.  In  there,  shared:N  means  the  mount  is
       shared, master:N means mount is slave, and if nothing is there, the mount is private. [1] ⟨#Footnote1⟩

       To  change  propagation  properties  of a mount point, use mount(8) command. For example, if one wants to
       bind mount source directory /foo, one can do mount --bind /foo  /foo  and  mount  --make-private  --make-
       shared  /foo.  This  converts  /foo  into  a  shared  mount point. Alternatively, one can directly change
       propagation properties of source mount. Say / is source mount for /foo, then use mount --make-shared / to
       convert / into a shared mount.

       Note:  if  the  user  only  has  access  rights  via a group, accessing the volume from inside a rootless
       container fails.

       Idmapped mount

       If idmap is specified, create an idmapped mount to the target user namespace in the container. The  idmap
       option supports a custom mapping that can be different than the user namespace used by the container. The
       mapping can be specified after the idmap option like: idmap=uids=0-1-10#10-11-10;gids=0-100-10.  For each
       triplet,  the first value is the start of the backing file system IDs that are mapped to the second value
       on the host.  The length of this mapping is given in the third value.  Multiple ranges are separated with
       #.

       Use the --group-add keep-groups option to pass the user's supplementary group access into the container.

   --volumes-from=CONTAINER[:OPTIONS]
       Mount volumes from the specified container(s). Used to share volumes between containers. The options is a
       comma-separated list with the following available elements:

              • rw|roz

       Mounts already mounted volumes from a source container onto another container. CONTAINER may be a name or
       ID.   To  share a volume, use the --volumes-from option when running the target container. Volumes can be
       shared even if the source container is not running.

       By default, Podman mounts the volumes in the same mode (read-write or read-only) as it is mounted in  the
       source container.  This can be changed by adding a ro or rw option.

       Labeling  systems  like  SELinux  require  that proper labels are placed on volume content mounted into a
       container. Without a label, the security system might prevent the processes running inside the  container
       from using the content. By default, Podman does not change the labels set by the OS.

       To  change  a  label  in  the  container context, add z to the volume mount.  This suffix tells Podman to
       relabel file objects on the shared volumes. The z option tells Podman that two entities share the  volume
       content.  As  a result, Podman labels the content with a shared content label. Shared volume labels allow
       all containers to read/write content.

       If the location of the volume from  the  source  container  overlaps  with  data  residing  on  a  target
       container, then the volume hides that data on the target.

   --workdir, -w=dir
       Working directory inside the container.

       The  default  working  directory  for running binaries within a container is the root directory (/).  The
       image developer can set a different default with the WORKDIR instruction. The operator can  override  the
       working directory by using the -w option.

Exit Status

       The  exit  code from podman run gives information about why the container failed to run or why it exited.
       When podman run exits with a non-zero code, the exit codes follow the chroot(1) standard, see below:

       125 The error is with Podman itself

       $ podman run --foo busybox; echo $?
       Error: unknown flag: --foo
       125

       126 The contained command cannot be invoked

       $ podman run busybox /etc; echo $?
       Error: container_linux.go:346: starting container process caused "exec: \"/etc\": permission denied": OCI runtime error
       126

       127 The contained command cannot be found

       $ podman run busybox foo; echo $?
       Error: container_linux.go:346: starting container process caused "exec: \"foo\": executable file not found in $PATH": OCI runtime error
       127

       Exit code contained command exit code

       $ podman run busybox /bin/sh -c 'exit 3'; echo $?
       3

EXAMPLES

   Running container in read-only mode
       During container image development, containers often need to  write  to  the  image  content.  Installing
       packages  into  /usr,  for  example.  In  production,  applications  seldom  need  to write to the image.
       Container applications write to volumes if they need to write to file systems at all. Applications can be
       made  more  secure  by  running  them  in read-only mode using the --read-only switch.  This protects the
       container's image from modification. By default read-only containers can write to temporary data.  Podman
       mounts a tmpfs on /run and /tmp within the container.

       $ podman run --read-only -i -t fedora /bin/bash

       If  the  container  does  not write to any file system within the container, including tmpfs, set --read-
       only-tmpfs=false.

       $ podman run --read-only --read-only-tmpfs=false --tmpfs /run -i -t fedora /bin/bash

   Exposing shared libraries inside of container as read-only using a glob
       $ podman run --mount type=glob,src=/usr/lib64/libnvidia\*,ro=true -i -t fedora /bin/bash

   Exposing log messages from the container to the host's log
       Bind mount the /dev/log directory to have messages that are logged in  the  container   show  up  in  the
       host's syslog/journal.

       $ podman run -v /dev/log:/dev/log -i -t fedora /bin/bash

       From inside the container test this by sending a message to the log.

       (bash)# logger "Hello from my container"

       Then exit and check the journal.

       (bash)# exit

       $ journalctl -b | grep Hello

       This lists the message sent to the logger.

   Attaching to one or more from STDIN, STDOUT, STDERR
       Without  specifying  the  -a  option,  Podman  attaches everything (stdin, stdout, stderr).  Override the
       default by specifying -a (stdin, stdout, stderr), as in:

       $ podman run -a stdin -a stdout -i -t fedora /bin/bash

   Sharing IPC between containers
       Using shm_server.c available here: https://www.cs.cf.ac.uk/Dave/C/node27.html

       Testing --ipc=host mode:

       Host shows a shared memory segment with 7 pids attached, happens to be from httpd:

       $ sudo ipcs -m

       ------ Shared Memory Segments --------
       key        shmid      owner      perms      bytes      nattch     status
       0x01128e25 0          root       600        1000       7

       Now run a regular container, and it correctly does NOT see the shared memory segment from the host:

       $ podman run -it shm ipcs -m

       ------ Shared Memory Segments --------
       key        shmid      owner      perms      bytes      nattch     status

       Run a container with the new --ipc=host option, and it now sees the shared memory segment from  the  host
       httpd:

       $ podman run -it --ipc=host shm ipcs -m

       ------ Shared Memory Segments --------
       key        shmid      owner      perms      bytes      nattch     status
       0x01128e25 0          root       600        1000       7

       Testing --ipc=container:id mode:

       Start a container with a program to create a shared memory segment:

       $ podman run -it shm bash
       $ sudo shm/shm_server &
       $ sudo ipcs -m

       ------ Shared Memory Segments --------
       key        shmid      owner      perms      bytes      nattch     status
       0x0000162e 0          root       666        27         1

       Create a 2nd container correctly shows no shared memory segment from 1st container:

       $ podman run shm ipcs -m

       ------ Shared Memory Segments --------
       key        shmid      owner      perms      bytes      nattch     status

       Create  a  3rd container using the --ipc=container:id option, now it shows the shared memory segment from
       the first:

       $ podman run -it --ipc=container:ed735b2264ac shm ipcs -m
       $ sudo ipcs -m

       ------ Shared Memory Segments --------
       key        shmid      owner      perms      bytes      nattch     status
       0x0000162e 0          root       666        27         1

   Mapping Ports for External Usage
       The exposed port of an application can be mapped to a host port using the -p flag. For example, an  httpd
       port 80 can be mapped to the host port 8080 using the following:

       $ podman run -p 8080:80 -d -i -t fedora/httpd

   Mounting External Volumes
       To  mount  a  host  directory  as  a container volume, specify the absolute path to the directory and the
       absolute path for the container directory separated  by  a  colon.  If  the  source  is  a  named  volume
       maintained by Podman, it is recommended to use its name rather than the path to the volume. Otherwise the
       volume is considered an orphan and wiped by the podman volume prune command:

       $ podman run -v /var/db:/data1 -i -t fedora bash

       $ podman run -v data:/data2 -i -t fedora bash

       $ podman run -v /var/cache/dnf:/var/cache/dnf:O -ti fedora dnf -y update

       If the container needs a writeable mounted volume by a non root user inside  the  container,  use  the  U
       option.  This option tells Podman to chown the source volume to match the default UID and GID used within
       the container.

       $ podman run -d -e MARIADB_ROOT_PASSWORD=root --user mysql --userns=keep-id -v ~/data:/var/lib/mysql:Z,U mariadb

       Alternatively if the container needs a writable volume by a non root user inside of  the  container,  the
       --userns=keep-id  option allows users to specify the UID and GID of the user executing Podman to specific
       UIDs and GIDs within the container. Since the processes running in the container run as the  user's  UID,
       they can read/write files owned by the user.

       $ podman run -d -e MARIADB_ROOT_PASSWORD=root --user mysql --userns=keep-id:uid=999,gid=999 -v ~/data:/var/lib/mysql:Z mariadb

       Using  --mount  flags  to  mount a host directory as a container folder, specify the absolute path to the
       directory or the volume name, and the absolute path within the container directory:

       $ podman run --mount type=bind,src=/var/db,target=/data1 busybox sh

       $ podman run --mount type=bind,src=volume-name,target=/data1 busybox sh

       When using SELinux, be aware that the host has no knowledge of container SELinux  policy.  Therefore,  in
       the above example, if SELinux policy is enforced, the /var/db directory is not writable to the container.
       A "Permission Denied" message occurs, and an avc: message is added to the host's syslog.

       To work around this, at time of writing this man page, the following command needs to be run in order for
       the proper SELinux policy type label to be attached to the host directory:

       $ chcon -Rt svirt_sandbox_file_t /var/db

       Now,  writing  to the /data1 volume in the container is allowed and the changes are reflected on the host
       in /var/db.

   Using alternative security labeling
       Override the default labeling scheme for each  container  by  specifying  the  --security-opt  flag.  For
       example,  specify the MCS/MLS level, a requirement for MLS systems. Specifying the level in the following
       command allows the same content to be shared between containers.

       podman run --security-opt label=level:s0:c100,c200 -i -t fedora bash

       An MLS example might be:

       $ podman run --security-opt label=level:TopSecret -i -t rhel7 bash

       To disable the security labeling for this container versus running with the

   --permissive flag, use the following command:
       $ podman run --security-opt label=disable -i -t fedora bash

       Tighten the security policy on the processes within a container by specifying an alternate type  for  the
       container.  For  example, run a container that is only allowed to listen on Apache ports by executing the
       following command:

       $ podman run --security-opt label=type:svirt_apache_t -i -t centos bash

       Note that an SELinux policy defining a svirt_apache_t type must be written.

       To mask additional specific paths in the container, specify the paths separated by a colon using the mask
       option with the --security-opt flag.

       $ podman run --security-opt mask=/foo/bar:/second/path fedora bash

       To  unmask  all  the  paths  that  are masked by default, set the unmask option to ALL. Or to only unmask
       specific paths, specify the paths as shown above with the mask option.

       $ podman run --security-opt unmask=ALL fedora bash

       To unmask all the paths that start with /proc, set the unmask option to /proc/*.

       $ podman run --security-opt unmask=/proc/* fedora bash

       $ podman run --security-opt unmask=/foo/bar:/sys/firmware fedora bash

   Setting device weight via --blkio-weight-device flag.
       $ podman run -it --blkio-weight-device "/dev/sda:200" ubuntu

   Using a podman container with input from a pipe
       $ echo "asdf" | podman run --rm -i --entrypoint /bin/cat someimage
       asdf

   Setting automatic user namespace separated containers
       # podman run --userns=auto:size=65536 ubi8-micro cat /proc/self/uid_map
       0 2147483647      65536
       # podman run --userns=auto:size=65536 ubi8-micro cat /proc/self/uid_map
       0 2147549183      65536

   Setting Namespaced Kernel Parameters (Sysctls)
       The --sysctl sets namespaced kernel parameters (sysctls) in the container. For example,  to  turn  on  IP
       forwarding in the containers network namespace, run this command:

       $ podman run --sysctl net.ipv4.ip_forward=1 someimage

       Note  that not all sysctls are namespaced. Podman does not support changing sysctls inside of a container
       that also modify the host system. As the kernel evolves we expect to see more sysctls become namespaced.

       See the definition of the --sysctl option above for the current list of supported sysctls.

   Set UID/GID mapping in a new user namespace
       Running a container in a new user namespace requires a mapping of the UIDs and GIDs from the host.

       $ podman run --uidmap 0:30000:7000 --gidmap 0:30000:7000 fedora echo hello

   Configuring Storage Options from the command line
       Podman allows for the configuration of storage by changing the values in the  /etc/container/storage.conf
       or by using global options. This shows how to set up and use fuse-overlayfs for a one-time run of busybox
       using global options.

       podman --log-level=debug --storage-driver overlay --storage-opt "overlay.mount_program=/usr/bin/fuse-overlayfs" run busybox /bin/sh

   Configure timezone in a container
       $ podman run --tz=local alpine date
       $ podman run --tz=Asia/Shanghai alpine date
       $ podman run --tz=US/Eastern alpine date

   Adding dependency containers
       The first container, container1, is not started initially, but must be running before container2  starts.
       The podman run command starts the container automatically before starting container2.

       $ podman create --name container1 -t -i fedora bash
       $ podman run --name container2 --requires container1 -t -i fedora bash

       Multiple containers can be required.

       $ podman create --name container1 -t -i fedora bash
       $ podman create --name container2 -t -i fedora bash
       $ podman run --name container3 --requires container1,container2 -t -i fedora bash

   Configure keep supplemental groups for access to volume
       $ podman run -v /var/lib/design:/var/lib/design --group-add keep-groups ubi8

   Configure execution domain for containers using personality flag
       $ podman run --name container1 --personality=LINUX32 fedora bash

   Run a container with external rootfs mounted as an overlay
       $ podman run --name container1 --rootfs /path/to/rootfs:O bash

   Handling Timezones in java applications in a container.
       In  order  to  use  a  timezone other than UTC when running a Java application within a container, the TZ
       environment variable must be set within the container. Java applications ignores the value set  with  the
       --tz option.

       # Example run
       podman run -ti --rm  -e TZ=EST mytzimage
       lrwxrwxrwx. 1 root root 29 Nov  3 08:51 /etc/localtime -> ../usr/share/zoneinfo/Etc/UTC
       Now with default timezone:
       Fri Nov 19 18:10:55 EST 2021
       Java default sees the following timezone:
       2021-11-19T18:10:55.651130-05:00
       Forcing UTC:
       Fri Nov 19 23:10:55 UTC 2021

   Run a container connected to two networks (called net1 and net2) with a static ip
       $ podman run --network net1:ip=10.89.1.5 --network net2:ip=10.89.10.10 alpine ip addr

   Rootless Containers
       Podman  runs  as  a  non-root  user  on  most systems. This feature requires that a new enough version of
       shadow-utils be installed. The shadow-utils  package  must  include  the  newuidmap(1)  and  newgidmap(1)
       executables.

       In  order  for  users  to  run  rootless,  there  must  be an entry for their username in /etc/subuid and
       /etc/subgid which lists the UIDs for their user namespace.

       Rootless Podman works better if the fuse-overlayfs and slirp4netns packages  are  installed.   The  fuse-
       overlayfs  package  provides  a  userspace  overlay  storage  driver, otherwise users need to use the vfs
       storage driver, which can be disk space expensive and less performant than other drivers.

       To enable VPN on the container, slirp4netns or pasta needs to be specified;  without  either,  containers
       need to be run with the --network=host flag.

ENVIRONMENT

       Environment  variables  within  containers  can be set using multiple different options, in the following
       order of precedence (later entries override earlier entries):

              • Container image: Any environment variables specified in the container image.

              • --http-proxy: By default, several environment variables are passed in from  the  host,  such  as
                http_proxy and no_proxy. See --http-proxy for details.

              • --env-host: Host environment of the process executing Podman is added.

              • --env-file:  Any environment variables specified via env-files. If multiple files are specified,
                then they override each other in order of entry.

              • --env: Any environment variables specified overrides previous settings.

       Run containers and set the environment ending with a *.  The trailing * glob functionality is only active
       when no value is specified:

       $ export ENV1=a
       $ podman run --env 'ENV*' alpine env | grep ENV
       ENV1=a
       $ podman run --env 'ENV*=b' alpine env | grep ENV
       ENV*=b

CONMON

       When  Podman  starts  a  container  it  actually executes the conmon program, which then executes the OCI
       Runtime.  Conmon is the container monitor.  It is a small program whose  job  is  to  watch  the  primary
       process  of  the container, and if the container dies, save the exit code.  It also holds open the tty of
       the container, so that it can be attached to later. This is what allows Podman to run  in  detached  mode
       (backgrounded), so Podman can exit but conmon continues to run.  Each container has their own instance of
       conmon. Conmon waits for the container to exit, gathers and saves the exit  code,  and  then  launches  a
       Podman  process  to  complete the container cleanup, by shutting down the network and storage.   For more
       information about conmon, see the conmon(8) man page.

FILES

       /etc/subuid

       /etc/subgid

       NOTE: Use the environment variable  TMPDIR  to  change  the  temporary  storage  location  of  downloaded
       container images. Podman defaults to use /var/tmp.

SEE ALSO

       podman(1),  podman-save(1), podman-ps(1), podman-attach(1), podman-pod-create(1), podman-port(1), podman-
       start(1), podman-kill(1), podman-stop(1), podman-generate-systemd(1), podman-rm(1), subgid(5), subuid(5),
       containers.conf(5),  systemd.unit(5), setsebool(8), slirp4netns(1), pasta(1), fuse-overlayfs(1), proc(5),
       conmon(8), personality(2)

   Troubleshooting
       See podman-troubleshooting(7) for solutions to common issues.

       See podman-rootless(7) for rootless issues.

HISTORY

       September 2018, updated by Kunal Kushwaha <kushwaha_kunal_v7@lab.ntt.co.jp>

       October 2017, converted from Docker documentation to Podman by Dan Walsh for Podman <dwalsh@redhat.com>

       November 2015, updated by Sally O'Malley <somalley@redhat.com>

       June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>

       April 2014, Originally compiled by William Henry <whenry@redhat.com> based on docker.com source  material
       and internal work.

FOOTNOTES

       1:  The  Podman  project  is  committed to inclusivity, a core value of open source. The master and slave
       mount propagation terminology used here is problematic and divisive, and needs to  be  changed.  However,
       these  terms  are  currently  used  within the Linux kernel and must be used as-is at this time. When the
       kernel maintainers rectify this usage, Podman will follow suit immediately.

                                                                                                   podman-run(1)