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/pkg/domain/entities/pods.go b/pkg/domain/entities/pods.go
index 1e25e0872..a19edcbf0 100644
--- a/pkg/domain/entities/pods.go
+++ b/pkg/domain/entities/pods.go
@@ -122,6 +122,7 @@ type PodCreateOptions struct {
 	CreateCommand      []string          `json:"create_command,omitempty"`
 	Devices            []string          `json:"devices,omitempty"`
 	DeviceReadBPs      []string          `json:"device_read_bps,omitempty"`
+	ExitPolicy         string            `json:"exit_policy,omitempty"`
 	Hostname           string            `json:"hostname,omitempty"`
 	Infra              bool              `json:"infra,omitempty"`
 	InfraImage         string            `json:"infra_image,omitempty"`
@@ -319,6 +320,7 @@ func ToPodSpecGen(s specgen.PodSpecGenerator, p *PodCreateOptions) (*specgen.Pod
 	}
 	s.Pid = out
 	s.Hostname = p.Hostname
+	s.ExitPolicy = p.ExitPolicy
 	s.Labels = p.Labels
 	s.Devices = p.Devices
 	s.SecurityOpt = p.SecurityOpt