podman service reaper #10851
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podman service reaper #10851
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: Luap99 The full list of commands accepted by this bot can be found here. The pull request process is described here
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lgtm ... cool! |
jwhonce
reviewed
Jul 2, 2021
Add a new service reaper package. Podman currently does not reap all child processes. The slirp4netns and rootlesskit processes are not reaped. The is not a problem for local podman since the podman process dies before the other processes and then init will reap them for us. However with podman system service it is possible that the podman process is still alive after slirp died. In this case podman has to reap it or the slirp process will be a zombie until the service is stopped. The service reaper will listen in an extra goroutine on SIGCHLD. Once it receives this signal it will try to reap all pids that were added with `AddPID()`. While I would like to just reap all children this is not possible because many parts of the code use `os/exec` with `cmd.Wait()`. If we reap before `cmd.Wait()` things can break, so reaping everything is not an option. [NO TESTS NEEDED] Fixes containers#9777 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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/hold pending tests |
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LGTM |
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Add a new service reaper package. Podman currently does not reap all
child processes. The slirp4netns and rootlesskit processes are not
reaped. The is not a problem for local podman since the podman process
dies before the other processes and then init will reap them for us.
However with podman system service it is possible that the podman
process is still alive after slirp died. In this case podman has to reap
it or the slirp process will be a zombie until the service is stopped.
The service reaper will listen in an extra goroutine on SIGCHLD. Once it
receives this signal it will try to reap all pids that were added with
AddPID(). While I would like to just reap all children this is notpossible because many parts of the code use
os/execwithcmd.Wait().If we reap before
cmd.Wait()things can break, so reaping everythingis not an option.
Fixes #9777