NAME

       fence_mpath - Fence agent for multipath persistent reservation

DESCRIPTION

       fence_mpath  is an I/O fencing agent that uses SCSI-3 persistent reservations to control access multipath
       devices. Underlying devices must support SCSI-3 persistent reservations (SPC-3 or greater) as well as the
       "preempt-and-abort" subcommand.  The fence_mpath agent works by having a unique key for  each  node  that
       has  to  be set in /etc/multipath.conf. Once registered, a single node will become the reservation holder
       by creating a "write exclusive, registrants only" reservation on the device(s). The result is  that  only
       registered  nodes  may  write  to  the  device(s). When a node failure occurs, the fence_mpath agent will
       remove the key belonging to the failed node from the device(s). The failed node will no longer be able to
       write to the device(s). A manual reboot is required.

       fence_mpath accepts options on the command line as well as from stdin. Fenced  sends  parameters  through
       stdin  when  it  execs  the  agent.  fence_mpath can be run by itself with command line options.  This is
       useful for testing and for turning outlets on or off from scripts.

       Vendor URL: https://www.sourceware.org/dm/

PARAMETERS

       -o, --action=[action]
              Fencing action (Default Value: off)

       -d, --devices=[devices]
              List of devices to use for current operation. Devices can be comma-separated list of device-mapper
              multipath devices (eg. /dev/mapper/3600508b400105df70000e00000ac0000 or /dev/mapper/mpath1).  Each
              device must support SCSI-3 persistent reservations. This parameter is always required.

       -k, --key=[key]
              Key  to  use for the current operation. This key should be unique to a node and have to be written
              in /etc/multipath.conf. For the "on" action, the key specifies the key use to register  the  local
              node.  For  the  "off"  action,  this key specifies the key to be removed from the device(s). This
              parameter is always required.

       -q, --quiet
              Disable logging to stderr. Does not affect --verbose or --debug logging to syslog.

       -v, --verbose
              Verbose mode

       -D, --debug-file=[debugfile]
              Write debug information to given file

       -V, --version
              Display version information and exit

       -h, --help
              Display help and exit

       --delay=[seconds]
              Wait X seconds before fencing is started (Default Value: 0)

       --login-timeout=[seconds]
              Wait X seconds for cmd prompt after login (Default Value: 5)

       --mpathpersist-path=[path]
              Path to mpathpersist binary (Default Value: /usr/sbin/mpathpersist)

       --power-timeout=[seconds]
              Test X seconds for status change after ON/OFF (Default Value: 20)

       --power-wait=[seconds]
              Wait X seconds after issuing ON/OFF (Default Value: 0)

       --shell-timeout=[seconds]
              Wait X seconds for cmd prompt after issuing command (Default Value: 3)

       --store-path=[path]
              Path to directory where fence agent can store information (Default Value: /var/run/cluster)

       --retry-on=[attempts]
              Count of attempts to retry power on (Default Value: 1)

       --use-sudo
              Use sudo (without password) when calling 3rd party software

       --sudo-path=[path]
              Path to sudo binary (Default Value: /usr/bin/sudo)

ACTIONS

       on     Power on machine.

       off    Power off machine.

       status This returns the status of the plug/virtual machine.

       monitor
              Check the health of fence device

       metadata
              Display the XML metadata describing this resource.

       validate-all
              Validate if all required parameters are entered.

STDIN PARAMETERS

       action Fencing action (Default Value: off)

       devices
              List of devices to use for current operation. Devices can be comma-separated list of device-mapper
              multipath devices (eg. /dev/mapper/3600508b400105df70000e00000ac0000 or /dev/mapper/mpath1).  Each
              device must support SCSI-3 persistent reservations. This parameter is always required.

       key    Key  to  use for the current operation. This key should be unique to a node and have to be written
              in /etc/multipath.conf. For the "on" action, the key specifies the key use to register  the  local
              node.  For  the  "off"  action,  this key specifies the key to be removed from the device(s). This
              parameter is always required.

       quiet  Disable logging to stderr. Does not affect --verbose or --debug logging to syslog.

       verbose
              Verbose mode

       debug_file
              Write debug information to given file Obsoletes: debug

       version
              Display version information and exit

       help   Display help and exit

       delay  Wait X seconds before fencing is started (Default Value: 0)

       login_timeout
              Wait X seconds for cmd prompt after login (Default Value: 5)

       mpathpersist_path
              Path to mpathpersist binary (Default Value: /usr/sbin/mpathpersist)

       power_timeout
              Test X seconds for status change after ON/OFF (Default Value: 20)

       power_wait
              Wait X seconds after issuing ON/OFF (Default Value: 0)

       shell_timeout
              Wait X seconds for cmd prompt after issuing command (Default Value: 3)

       store_path
              Path to directory where fence agent can store information (Default Value: /var/run/cluster)

       retry_on
              Count of attempts to retry power on (Default Value: 1)

       use_sudo
              Use sudo (without password) when calling 3rd party software Obsoletes: sudo

       sudo_path
              Path to sudo binary (Default Value: /usr/bin/sudo)

fence_mpath (Fence Agent)                          2009-10-20                                     FENCE_AGENT(8)