Add integration test for image load

Signed-off-by: Lantao Liu <lantaol@google.com>

integration/image_load_test.go

@@ -0,0 +1,93 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package integration
+
+import (
+	"golang.org/x/net/context"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
+
+	api "github.com/kubernetes-incubator/cri-containerd/pkg/api/v1"
+)
+
+// Test to load an image from tarball.
+func TestImageLoad(t *testing.T) {
+	testImage := "busybox:latest"
+	loadedImage := "docker.io/library/" + testImage
+	_, err := exec.LookPath("docker")
+	if err != nil {
+		t.Skip("Docker is not available: %v", err)
+	}
+	t.Logf("docker save image into tarball")
+	output, err := exec.Command("docker", "pull", testImage).CombinedOutput()
+	require.NoError(t, err, "output: %q", output)
+	tarF, err := ioutil.TempFile("", "image-load")
+	tar := tarF.Name()
+	require.NoError(t, err)
+	defer func() {
+		assert.NoError(t, os.RemoveAll(tar))
+	}()
+	output, err = exec.Command("docker", "save", testImage, "-o", tar).CombinedOutput()
+	require.NoError(t, err, "output: %q", output)
+
+	t.Logf("make sure no such image in cri-containerd")
+	img, err := imageService.ImageStatus(&runtime.ImageSpec{Image: testImage})
+	require.NoError(t, err)
+	if img != nil {
+		require.NoError(t, imageService.RemoveImage(&runtime.ImageSpec{Image: testImage}))
+	}
+
+	t.Logf("load image in cri-containerd")
+	res, err := criContainerdClient.LoadImage(context.Background(), &api.LoadImageRequest{FilePath: tar})
+	require.NoError(t, err)
+	require.Equal(t, []string{loadedImage}, res.GetImages())
+
+	t.Logf("make sure image is loaded")
+	img, err = imageService.ImageStatus(&runtime.ImageSpec{Image: testImage})
+	require.NoError(t, err)
+	require.NotNil(t, img)
+	require.Equal(t, []string{loadedImage}, img.RepoTags)
+
+	t.Logf("create a container with the loaded image")
+	sbConfig := PodSandboxConfig("sandbox", Randomize("image-load"))
+	sb, err := runtimeService.RunPodSandbox(sbConfig)
+	require.NoError(t, err)
+	defer func() {
+		assert.NoError(t, runtimeService.StopPodSandbox(sb))
+		assert.NoError(t, runtimeService.RemovePodSandbox(sb))
+	}()
+	containerConfig := ContainerConfig(
+		"container",
+		testImage,
+		WithCommand("tail", "-f", "/dev/null"),
+	)
+	// Rely on sandbox clean to do container cleanup.
+	cn, err := runtimeService.CreateContainer(sb, containerConfig, sbConfig)
+	require.NoError(t, err)
+	require.NoError(t, runtimeService.StartContainer(cn))
+
+	t.Logf("make sure container is running")
+	status, err := runtimeService.ContainerStatus(cn)
+	require.NoError(t, err)
+	require.Equal(t, runtime.ContainerState_CONTAINER_RUNNING, status.State)
+}