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Podman defers stopping the container to the runtime, which can take some
time. Keeping the lock while waiting for the runtime to complete the
stop procedure, prevents other commands from acquiring the lock as shown
in #8501.
To improve the user experience, release the lock before invoking the
runtime, and re-acquire the lock when the runtime is finished. Also
introduce an intermediate "stopping" to properly distinguish from
"stopped" containers etc.
Fixes: #8501
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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Signed-off-by: baude <bbaude@redhat.com>
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As part of the rework of exec sessions, we want to split Create
and Start - and, as a result, we need to keep everything needed
to start exec sessions in the struct, not just the bare minimum
for tracking running ones.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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When Libpod removes a container, there is the possibility that
removal will not fully succeed. The most notable problems are
storage issues, where the container cannot be removed from
c/storage.
When this occurs, we were faced with a choice. We can keep the
container in the state, appearing in `podman ps` and available for
other API operations, but likely unable to do any of them as it's
been partially removed. Or we can remove it very early and clean
up after it's already gone. We have, until now, used the second
approach.
The problem that arises is intermittent problems removing
storage. We end up removing a container, failing to remove its
storage, and ending up with a container permanently stuck in
c/storage that we can't remove with the normal Podman CLI, can't
use the name of, and generally can't interact with. A notable
cause is when Podman is hit by a SIGKILL midway through removal,
which can consistently cause `podman rm` to fail to remove
storage.
We now add a new state for containers that are in the process of
being removed, ContainerStateRemoving. We set this at the
beginning of the removal process. It notifies Podman that the
container cannot be used anymore, but preserves it in the DB
until it is fully removed. This will allow Remove to be run on
these containers again, which should successfully remove storage
if it fails.
Fixes #3906
Signed-off-by: Matthew Heon <mheon@redhat.com>
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this is phase 2 for the removal of libpod from main.
Signed-off-by: baude <bbaude@redhat.com>
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