NAME

       podman-system-migrate - Migrate existing containers to a new podman version

SYNOPSIS

       podman system migrate [options]

DESCRIPTION

       podman system migrate migrates containers to the latest podman version.

       podman system migrate takes care of migrating existing containers to the latest version of
       podman if any change is necessary.

       "Rootless Podman uses a pause process to keep  the  unprivileged  namespaces  alive.  This
       prevents  any change to the /etc/subuid and /etc/subgid files from being propagated to the
       rootless containers while the pause process is running.

       For these changes to be propagated, it is necessary to first stop all  running  containers
       associated  with  the  user  and  to  also stop the pause process and delete its pid file.
       Instead of doing it manually, podman system migrate can be used to stop both  the  running
       containers and the pause process. The /etc/subuid and /etc/subgid files can then be edited
       or changed with usermod to recreate the user namespace with the newly configured mappings.

OPTIONS

   --new-runtime=runtime
       Set a new OCI runtime for all containers.  This can be used after a system  upgrade  which
       changes  the  default OCI runtime to move all containers to the new runtime.  There are no
       guarantees that the containers continue to work under the new runtime,  as  some  runtimes
       support differing options and configurations.

SEE ALSO

       podman(1), podman-system(1), usermod(8)

HISTORY

       April 2019, Originally compiled by Giuseppe Scrivano (gscrivan at redhat dot com)

                                                                         podman-system-migrate(1)