diff options
Diffstat (limited to 'libpod/oci_conmon_linux.go')
| -rw-r--r-- | libpod/oci_conmon_linux.go | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/libpod/oci_conmon_linux.go b/libpod/oci_conmon_linux.go index 9c92b036e..0921a532b 100644 --- a/libpod/oci_conmon_linux.go +++ b/libpod/oci_conmon_linux.go @@ -669,6 +669,31 @@ func (r *ConmonOCIRuntime) CheckpointContainer(ctr *Container, options Container return utils.ExecCmdWithStdStreams(os.Stdin, os.Stdout, os.Stderr, nil, r.path, args...) } +func (r *ConmonOCIRuntime) CheckConmonRunning(ctr *Container) (bool, error) { + if ctr.state.ConmonPID == 0 { + // If the container is running or paused, assume Conmon is + // running. We didn't record Conmon PID on some old versions, so + // that is likely what's going on... + // Unusual enough that we should print a warning message though. + if ctr.ensureState(define.ContainerStateRunning, define.ContainerStatePaused) { + logrus.Warnf("Conmon PID is not set, but container is running!") + return true, nil + } + // Container's not running, so conmon PID being unset is + // expected. Conmon is not running. + return false, nil + } + + // We have a conmon PID. Ping it with signal 0. + if err := unix.Kill(ctr.state.ConmonPID, 0); err != nil { + if err == unix.ESRCH { + return false, nil + } + return false, errors.Wrapf(err, "error pinging container %s conmon with signal 0", ctr.ID()) + } + return true, nil +} + // SupportsCheckpoint checks if the OCI runtime supports checkpointing // containers. func (r *ConmonOCIRuntime) SupportsCheckpoint() bool { |