pod: add exit policies

Add the notion of an "exit policy" to a pod.  This policy controls the
behaviour when the last container of pod exits.  Initially, there are
two policies:

 - "continue" : the pod continues running. This is the default policy
                when creating a pod.

 - "stop" : stop the pod when the last container exits. This is the
            default behaviour for `play kube`.

In order to implement the deferred stop of a pod, add a worker queue to
the libpod runtime.  The queue will pick up work items and in this case
helps resolve dead locks that would otherwise occur if we attempted to
stop a pod during container cleanup.

Note that the default restart policy of `play kube` is "Always".  Hence,
in order to really solve #13464, the YAML files must set a custom
restart policy; the tests use "OnFailure".

Fixes: #13464
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libpod/define/pod_inspect.go b/libpod/define/pod_inspect.go
index e85a660a1..219ffade2 100644
--- a/libpod/define/pod_inspect.go
+++ b/libpod/define/pod_inspect.go
@@ -19,6 +19,8 @@ type InspectPodData struct {
 	// CreateCommand is the full command plus arguments of the process the
 	// container has been created with.
 	CreateCommand []string `json:"CreateCommand,omitempty"`
+	// ExitPolicy of the pod.
+	ExitPolicy string `json:"ExitPolicy,omitempty"`
 	// State represents the current state of the pod.
 	State string `json:"State"`
 	// Hostname is the hostname that the pod will set.