Use containerd version returned by version service.

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

pkg/server/version.go

@@ -28,23 +28,20 @@ import (
 const (
 	containerName        = "containerd"
 	containerdAPIVersion = "0.0.0"
-	containerdVersion    = "0.0.0"
 	// kubeAPIVersion is the api version of kubernetes.
 	kubeAPIVersion = "0.1.0"
 )
 
 // Version returns the runtime name, runtime version and runtime API version.
 func (c *criContainerdService) Version(ctx context.Context, r *runtime.VersionRequest) (*runtime.VersionResponse, error) {
-	_, err := c.versionService.Version(ctx, &empty.Empty{})
+	resp, err := c.versionService.Version(ctx, &empty.Empty{})
 	if err != nil {
 		return nil, fmt.Errorf("failed to get containerd version: %v", err)
 	}
 	return &runtime.VersionResponse{
 		Version:        kubeAPIVersion,
 		RuntimeName:    containerName,
-		// Containerd doesn't return semver because of a bug.
-		// TODO(random-liu): Replace this with version from containerd.
-		RuntimeVersion: containerdVersion,
+		RuntimeVersion: resp.Version,
 		// Containerd doesn't have an api version now.
 		RuntimeApiVersion: containerdAPIVersion,
 	}, nil

pkg/server/version_test.go

@@ -38,6 +38,7 @@ func TestVersion(t *testing.T) {
 		versionRes      *versionapi.VersionResponse
 		versionErr      error
 		expectErr       bool
+		expectedVersion string
 	}{
 		"should return error if containerd version returns error": {
 			versionErr: errors.New("random error"),
@@ -55,7 +56,11 @@ func TestVersion(t *testing.T) {
 		mock.EXPECT().Version(ctx, &empty.Empty{}).Return(test.versionRes, test.versionErr)
 
 		c.versionService = mock
-		_, err := c.Version(ctx, &runtime.VersionRequest{})
+		v, err := c.Version(ctx, &runtime.VersionRequest{})
+		if test.expectErr {
 			assert.Equal(t, test.expectErr, err != nil)
+		} else {
+			assert.Equal(t, test.versionRes.Version, v.RuntimeVersion)
+		}
 	}
 }