Add ContainerStateExited and OCI delete() in cleanup()

To work better with Kata containers, we need to delete() from the
OCI runtime as a part of cleanup, to ensure resources aren't
retained longer than they need to be.

To enable this, we need to add a new state to containers,
ContainerStateExited. Containers transition from
ContainerStateStopped to ContainerStateExited via cleanupRuntime
which is invoked as part of cleanup(). A container in the Exited
state is identical to Stopped, except it has been removed from
the OCI runtime and thus will be handled differently when
initializing the container.

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/libpod/container.go b/libpod/container.go
index 0b1879208..55a0f3a2c 100644
--- a/libpod/container.go
+++ b/libpod/container.go
@@ -36,6 +36,9 @@ const (
 	ContainerStateStopped ContainerStatus = iota
 	// ContainerStatePaused indicates that the container has been paused
 	ContainerStatePaused ContainerStatus = iota
+	// ContainerStateExited indicates the the container has stopped and been
+	// cleaned up
+	ContainerStateExited ContainerStatus = iota
 )
 
 // CgroupfsDefaultCgroupParent is the cgroup parent for CGroupFS in libpod
@@ -354,9 +357,11 @@ func (t ContainerStatus) String() string {
 	case ContainerStateRunning:
 		return "running"
 	case ContainerStateStopped:
-		return "exited"
+		return "stopped"
 	case ContainerStatePaused:
 		return "paused"
+	case ContainerStateExited:
+		return "exited"
 	}
 	return "bad state"
 }