Add legacy container cleanup

pkg/kubelet/dockershim/docker_sandbox.go

@@ -244,12 +244,23 @@ func (ds *dockerService) PodSandboxStatus(podSandboxID string) (*runtimeapi.PodS
 	}
 	network := &runtimeapi.PodSandboxNetworkStatus{Ip: IP}
 	netNS := getNetworkNamespace(r)
+	hostNetwork := sharesHostNetwork(r)
+
+	// If the sandbox has no containerTypeLabelKey label, treat it as a legacy sandbox.
+	if _, ok := r.Config.Labels[containerTypeLabelKey]; !ok {
+		names, labels, err := convertLegacyNameAndLabels([]string{r.Name}, r.Config.Labels)
+		if err != nil {
+			return nil, err
+		}
+		r.Name, r.Config.Labels = names[0], labels
+		// Forcibly trigger infra container restart.
+		hostNetwork = !hostNetwork
+	}
 
 	metadata, err := parseSandboxName(r.Name)
 	if err != nil {
 		return nil, err
 	}
-	hostNetwork := sharesHostNetwork(r)
 	labels, annotations := extractLabels(r.Config.Labels)
 	return &runtimeapi.PodSandboxStatus{
 		Id:          r.ID,
@@ -318,7 +329,7 @@ func (ds *dockerService) ListPodSandbox(filter *runtimeapi.PodSandboxFilter) ([]
 		c := containers[i]
 		converted, err := containerToRuntimeAPISandbox(&c)
 		if err != nil {
-			glog.V(4).Infof("Unable to convert docker to runtime API sandbox: %v", err)
+			glog.V(4).Infof("Unable to convert docker to runtime API sandbox %+v: %v", c, err)
 			continue
 		}
 		if filterOutReadySandboxes && converted.State == runtimeapi.PodSandboxState_SANDBOX_READY {
@@ -353,6 +364,16 @@ func (ds *dockerService) ListPodSandbox(filter *runtimeapi.PodSandboxFilter) ([]
 			result = append(result, checkpointToRuntimeAPISandbox(id, checkpoint))
 		}
 	}
+
+	// Include legacy sandboxes if there are still legacy sandboxes not cleaned up yet.
+	if !ds.legacyCleanup.Done() {
+		legacySandboxes, err := ds.ListLegacyPodSandbox(filter)
+		if err != nil {
+			return nil, err
+		}
+		// Legacy sandboxes are always older, so we can safely append them to the end.
+		result = append(result, legacySandboxes...)
+	}
 	return result, nil
 }