Fake docker portfoward for in-process docker CRI integration

pkg/kubelet/dockershim/legacy.go

@@ -40,7 +40,7 @@ func (ds *dockerService) GetContainerLogs(pod *api.Pod, containerID kubecontaine
 }
 
 func (ds *dockerService) PortForward(pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error {
-	return fmt.Errorf("not implemented")
+	return dockertools.PortForward(ds.client, pod, port, stream)
 }
 
 func (ds *dockerService) ExecInContainer(containerID kubecontainer.ContainerID, cmd []string, stdin io.Reader, stdout, stderr io.WriteCloser, tty bool, resize <-chan term.Size) error {

pkg/kubelet/dockertools/docker_manager.go

@@ -1273,11 +1273,16 @@ func noPodInfraContainerError(podName, podNamespace string) error {
 //  - should we support nsenter + socat on the host? (current impl)
 //  - should we support nsenter + socat in a container, running with elevated privs and --pid=host?
 func (dm *DockerManager) PortForward(pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error {
+	return PortForward(dm.client, pod, port, stream)
+}
+
+// Temporarily export this function to share with dockershim.
+func PortForward(client DockerInterface, pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error {
 	podInfraContainer := pod.FindContainerByName(PodInfraContainerName)
 	if podInfraContainer == nil {
 		return noPodInfraContainerError(pod.Name, pod.Namespace)
 	}
-	container, err := dm.client.InspectContainer(podInfraContainer.ID.ID)
+	container, err := client.InspectContainer(podInfraContainer.ID.ID)
 	if err != nil {
 		return err
 	}

pkg/kubelet/kuberuntime/kuberuntime_manager.go

@@ -32,6 +32,7 @@ import (
 	internalApi "k8s.io/kubernetes/pkg/kubelet/api"
 	runtimeApi "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
 	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
+	"k8s.io/kubernetes/pkg/kubelet/dockershim"
 	"k8s.io/kubernetes/pkg/kubelet/events"
 	"k8s.io/kubernetes/pkg/kubelet/images"
 	"k8s.io/kubernetes/pkg/kubelet/lifecycle"
@@ -851,5 +852,12 @@ func (m *kubeGenericRuntimeManager) GetPodContainerID(pod *kubecontainer.Pod) (k
 
 // Forward the specified port from the specified pod to the stream.
 func (m *kubeGenericRuntimeManager) PortForward(pod *kubecontainer.Pod, port uint16, stream io.ReadWriteCloser) error {
+	// Use docker portforward directly for in-process docker integration
+	// now to unblock other tests.
+	// TODO: remove this hack after portforward is defined in CRI.
+	if ds, ok := m.runtimeService.(dockershim.DockerLegacyService); ok {
+		return ds.PortForward(pod, port, stream)
+	}
+
 	return fmt.Errorf("not implemented")
 }