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runtime: sending SIGKILL to qemu

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There is a race condition when virtiofsd is killed without finishing all
the clients. Because of that, when a pod is stopped, QEMU detects
virtiofsd is gone, which is legitimate.

Sending a SIGTERM first before killing could introduce some latency
during the shutdown.

Fixes #6757.

Signed-off-by: Beraldo Leal <bleal@redhat.com>
This commit is contained in:
Beraldo Leal 2023-05-24 11:27:04 -04:00
parent 7c9faab523
commit 0e47cfc4c7
1 changed files with 8 additions and 9 deletions
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17
src/runtime/virtcontainers/qemu.go
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@ -1122,22 +1122,21 @@ func (q *qemu) StopVM(ctx context.Context, waitOnly bool) (err error) {
return err
}
pids := q.GetPids()
if len(pids) == 0 {
return errors.New("cannot determine QEMU PID")
}
pid := pids[0]
if waitOnly {
pids := q.GetPids()
if len(pids) == 0 {
return errors.New("cannot determine QEMU PID")
}
pid := pids[0]
err := utils.WaitLocalProcess(pid, qemuStopSandboxTimeoutSecs, syscall.Signal(0), q.Logger())
if err != nil {
return err
}
} else {
err := q.qmpMonitorCh.qmp.ExecuteQuit(q.qmpMonitorCh.ctx)
err = syscall.Kill(pid, syscall.SIGKILL)
if err != nil {
q.Logger().WithError(err).Error("Fail to execute qmp QUIT")
q.Logger().WithError(err).Error("Fail to send SIGKILL to qemu")
return err
}
}