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| author | Giuseppe Scrivano <gscrivan@redhat.com> | 2019-06-18 11:06:03 +0200 |
|---|---|---|
| committer | Giuseppe Scrivano <gscrivan@redhat.com> | 2019-06-19 22:58:37 +0200 |
| commit | 300025359eb5ed6d2128d4675fa9b72a3841761c (patch) | |
| tree | 17dfcb33e12b555dfe785df9bfa710e2e534fd89 /docs | |
| parent | 8bcfd24397ee365a08ea9fe95cae91554a933e5c (diff) | |
| download | podman-300025359eb5ed6d2128d4675fa9b72a3841761c.tar.gz podman-300025359eb5ed6d2128d4675fa9b72a3841761c.tar.bz2 podman-300025359eb5ed6d2128d4675fa9b72a3841761c.zip | |
docs: add note to system migrate
add a note explaining how it can be used to recreate the rootless user
namespace.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/podman-system-migrate.1.md | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/docs/podman-system-migrate.1.md b/docs/podman-system-migrate.1.md index 48f3bca8f..1efa779ce 100644 --- a/docs/podman-system-migrate.1.md +++ b/docs/podman-system-migrate.1.md @@ -11,11 +11,24 @@ podman\-system\-migrate - Migrate container to the latest version of podman **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. + ## SYNOPSIS **podman system migrate** ## SEE ALSO -`podman(1)`, `libpod.conf(5)` +`podman(1)`, `libpod.conf(5)`, `usermod(8)` ## HISTORY April 2019, Originally compiled by Giuseppe Scrivano (gscrivan at redhat dot com) |