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c6090c290e
New functionality in hack/man-page-checker: start cross- referencing the man page 'Synopsis' line against the output of 'podman foo --help'. This is part 1, flag/option consistency. Part 2 (arg consistency) is too big and will have to wait for later. flag/option consistency means: if 'podman foo --help' includes the string '[flags]' in the Usage message, make sure the man page includes '[*options*]' in its Synopsis line, and vice-versa. This found several inconsistencies, which I've fixed. While doing this I realized that Cobra automatically includes a 'Flags:' subsection in its --help output for all subcommands that have defined flags. This is great - it lets us cross-check against the usage synopsis, and make sure that '[flags]' is present or absent as needed, without fear of human screwups. If a flag-less subcommand ever gets extended with flags, but the developer forgets to add '[flags]' and remove DisableFlagsInUseLine, we now have a test that will catch that. (This, too, caught two instances which I fixed). I don't actually know if the new man-page-checker functionality will work in CI: I vaguely recall that it might run before 'make podman' does; and also vaguely recall that some steps were taken to remedy that. Signed-off-by: Ed Santiago <santiago@redhat.com>
40 lines
1.5 KiB
Markdown
40 lines
1.5 KiB
Markdown
% podman-system-migrate(1)
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## NAME
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podman\-system\-migrate - Migrate existing containers to a new podman version
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## SYNOPSIS
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**podman system migrate** [*options*]
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## DESCRIPTION
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**podman system migrate** migrates containers to the latest podman version.
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**podman system migrate** takes care of migrating existing containers to the latest version of podman if any change is necessary.
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"Rootless Podman uses a pause process to keep the unprivileged
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namespaces alive. This prevents any change to the `/etc/subuid` and
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`/etc/subgid` files from being propagated to the rootless containers
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while the pause process is running.
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For these changes to be propagated, it is necessary to first stop all
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running containers associated with the user and to also stop the pause
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process and delete its pid file. Instead of doing it manually, `podman
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system migrate` can be used to stop both the running containers and the
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pause process. The `/etc/subuid` and `/etc/subgid` files can then be
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edited or changed with usermod to recreate the user namespace with the
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newly configured mappings.
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## OPTIONS
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**--new-runtime**=*runtime*
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Set a new OCI runtime for all containers.
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This can be used after a system upgrade which changes the default OCI runtime to move all containers to the new runtime.
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There are no guarantees that the containers will continue to work under the new runtime, as some runtimes support differing options and configurations.
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## SEE ALSO
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`podman(1)`, `libpod.conf(5)`, `usermod(8)`
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## HISTORY
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April 2019, Originally compiled by Giuseppe Scrivano (gscrivan at redhat dot com)
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