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We currently rely on exec sessions being removed from the state
by the Exec() API itself, on detecting the session stopping. This
is not a reliable method, though. The Podman frontend for exec
could be killed before the session ended, or another Podman
process could be holding the lock and prevent update (most
notable in `run --rm`, when a container with an active exec
session is stopped).
To resolve this, add a function to reap active exec sessions from
the state, and use it on cleanup (to clear sessions after the
container stops) and remove (to do the same when --rm is passed).
This is a bit more complicated than it ought to be because Kata
and company exist, and we can't guarantee the exec session has a
PID on the host, so we have to plumb this through to the OCI
runtime.
Fixes #4666
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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refactor libpod config into libpod/config
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Refactor the `RuntimeConfig` along with related code from libpod into
libpod/config. Note that this is a first step of consolidating code
into more coherent packages to make the code more maintainable and less
prone to regressions on the long runs.
Some libpod definitions were moved to `libpod/define` to resolve
circular dependencies.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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libpod, rootless: create cgroup for conmon
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always create a new cgroup for conmon also when running as rootless.
We were previously creating one only when necessary, but that behaves
differently than root containers.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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Processes execed into a container were not being run with the correct label.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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Signed-off-by: Peter Hunt <pehunt@redhat.com>
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When a container is created with a given OCI runtime, but then it
is uninstalled or removed from the configuration file, Libpod
presently reacts very poorly. The EvictContainer code can
potentially remove these containers, but we still can't see them
in `podman ps` (aside from the massive logrus.Errorf messages
they create).
Providing a minimal OCI runtime implementation for missing
runtimes allows us to behave better. We'll be able to retrieve
containers from the database, though we still pop up an error for
each missing runtime. For containers which are stopped, we can
remove them as normal.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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In some cases, conmon can fail without writing logs. Change the wording
of the error message from
"error reading container (probably exited) json message"
to
"container create failed (no logs from conmon)"
to have a more helpful error message that is more consistent with other
errors at that stage of execution.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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For future work, we need multiple implementations of the OCI
runtime, not just a Conmon-wrapped runtime matching the runc CLI.
As part of this, do some refactoring on the interface for exec
(move to a struct, not a massive list of arguments). Also, add
'all' support to Kill and Stop (supported by runc and used a bit
internally for removing containers).
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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