add ContainerRuntimeVersion to `kubectl get nodes -o=wide` output

pkg/printers/internalversion/printers.go

@@ -71,7 +71,7 @@ var (
 	statefulSetColumns               = []string{"NAME", "DESIRED", "CURRENT", "AGE"}
 	endpointColumns                  = []string{"NAME", "ENDPOINTS", "AGE"}
 	nodeColumns                      = []string{"NAME", "STATUS", "AGE", "VERSION"}
-	nodeWideColumns                  = []string{"EXTERNAL-IP", "OS-IMAGE", "KERNEL-VERSION"}
+	nodeWideColumns                  = []string{"EXTERNAL-IP", "OS-IMAGE", "KERNEL-VERSION", "CONTAINER-RUNTIME"}
 	daemonSetColumns                 = []string{"NAME", "DESIRED", "CURRENT", "READY", "UP-TO-DATE", "AVAILABLE", "NODE-SELECTOR", "AGE"}
 	daemonSetWideColumns             = []string{"CONTAINER(S)", "IMAGE(S)", "SELECTOR"}
 	eventColumns                     = []string{"LASTSEEN", "FIRSTSEEN", "COUNT", "NAME", "KIND", "SUBOBJECT", "TYPE", "REASON", "SOURCE", "MESSAGE"}
@@ -1127,14 +1127,17 @@ func printNode(node *api.Node, w io.Writer, options printers.PrintOptions) error
 	}
 
 	if options.Wide {
-		osImage, kernelVersion := node.Status.NodeInfo.OSImage, node.Status.NodeInfo.KernelVersion
+		osImage, kernelVersion, crVersion := node.Status.NodeInfo.OSImage, node.Status.NodeInfo.KernelVersion, node.Status.NodeInfo.ContainerRuntimeVersion
 		if osImage == "" {
 			osImage = "<unknown>"
 		}
 		if kernelVersion == "" {
 			kernelVersion = "<unknown>"
 		}
-		if _, err := fmt.Fprintf(w, "\t%s\t%s\t%s", getNodeExternalIP(node), osImage, kernelVersion); err != nil {
+		if crVersion == "" {
+			crVersion = "<unknown>"
+		}
+		if _, err := fmt.Fprintf(w, "\t%s\t%s\t%s\t%s", getNodeExternalIP(node), osImage, kernelVersion, crVersion); err != nil {
 			return err
 		}
 	}

pkg/printers/internalversion/printers_test.go

@@ -826,6 +826,51 @@ func TestPrintNodeKernelVersion(t *testing.T) {
 	}
 }
 
+func TestPrintNodeContainerRuntimeVersion(t *testing.T) {
+	printer := printers.NewHumanReadablePrinter(nil, nil, printers.PrintOptions{
+		ColumnLabels: []string{},
+		Wide:         true,
+	})
+	AddHandlers(printer)
+
+	table := []struct {
+		node                    api.Node
+		containerRuntimeVersion string
+	}{
+		{
+			node: api.Node{
+				ObjectMeta: metav1.ObjectMeta{Name: "foo1"},
+				Status: api.NodeStatus{
+					NodeInfo:  api.NodeSystemInfo{ContainerRuntimeVersion: "foo://1.2.3"},
+					Addresses: []api.NodeAddress{{Type: api.NodeExternalIP, Address: "1.1.1.1"}},
+				},
+			},
+			containerRuntimeVersion: "foo://1.2.3",
+		},
+		{
+			node: api.Node{
+				ObjectMeta: metav1.ObjectMeta{Name: "foo2"},
+				Status: api.NodeStatus{
+					NodeInfo:  api.NodeSystemInfo{},
+					Addresses: []api.NodeAddress{{Type: api.NodeExternalIP, Address: "1.1.1.1"}},
+				},
+			},
+			containerRuntimeVersion: "<unknown>",
+		},
+	}
+
+	for _, test := range table {
+		buffer := &bytes.Buffer{}
+		err := printer.PrintObj(&test.node, buffer)
+		if err != nil {
+			t.Fatalf("An error occurred printing Node: %#v", err)
+		}
+		if !contains(strings.Fields(buffer.String()), test.containerRuntimeVersion) {
+			t.Fatalf("Expect printing node %s with kernel version %#v, got: %#v", test.node.Name, test.containerRuntimeVersion, buffer.String())
+		}
+	}
+}
+
 func TestPrintNodeName(t *testing.T) {
 	printer := printers.NewHumanReadablePrinter(nil, nil, printers.PrintOptions{
 		Wide: true,