generate systemd: pods: set exit policy

Unless specified in the create command of the pod, enforce the exit
policy to "stop".  With "stop", a pod is stopped when the last container
exits and does not continue running.  This behavior integrates much
better into systemd which is now able to tell whether the service
running as pod is actually running/active or not.

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/pkg/systemd/generate/pods.go b/pkg/systemd/generate/pods.go
index cd1486a82..4043fbfcb 100644
--- a/pkg/systemd/generate/pods.go
+++ b/pkg/systemd/generate/pods.go
@@ -256,6 +256,16 @@ func generatePodInfo(pod *libpod.Pod, options entities.GenerateSystemdOptions) (
 	return &info, nil
 }
 
+// Unless already specified, the pod's exit policy to "stop".
+func setPodExitPolicy(cmd []string) []string {
+	for _, arg := range cmd {
+		if strings.HasPrefix(arg, "--exit-policy=") || arg == "--exit-policy" {
+			return cmd
+		}
+	}
+	return append(cmd, "--exit-policy=stop")
+}
+
 // executePodTemplate executes the pod template on the specified podInfo.  Note
 // that the podInfo is also post processed and completed, which allows for an
 // easier unit testing.
@@ -355,6 +365,7 @@ func executePodTemplate(info *podInfo, options entities.GenerateSystemdOptions)
 		}
 
 		startCommand = append(startCommand, podCreateArgs...)
+		startCommand = setPodExitPolicy(startCommand)
 		startCommand = escapeSystemdArguments(startCommand)
 
 		info.ExecStartPre1 = "/bin/rm -f {{{{.PIDFile}}}} {{{{.PodIDFile}}}}"