cli: support factory status command

It checks vm factory status and prints the result.

Fixes: #545

Signed-off-by: Peng Tao <bergwolf@gmail.com>

cli/factory.go

@@ -18,6 +18,7 @@ import (
 var factorySubCmds = []cli.Command{
 	initFactoryCommand,
 	destroyFactoryCommand,
+	statusFactoryCommand,
 }
 
 var factoryCLICommand = cli.Command{
@@ -96,3 +97,37 @@ var destroyFactoryCommand = cli.Command{
 		return nil
 	},
 }
+
+var statusFactoryCommand = cli.Command{
+	Name:  "status",
+	Usage: "query the status of VM factory",
+	Action: func(context *cli.Context) error {
+		runtimeConfig, ok := context.App.Metadata["runtimeConfig"].(oci.RuntimeConfig)
+		if !ok {
+			return errors.New("invalid runtime config")
+		}
+
+		if runtimeConfig.FactoryConfig.Template {
+			factoryConfig := vf.Config{
+				Template: true,
+				VMConfig: vc.VMConfig{
+					HypervisorType:   runtimeConfig.HypervisorType,
+					HypervisorConfig: runtimeConfig.HypervisorConfig,
+					AgentType:        runtimeConfig.AgentType,
+					AgentConfig:      runtimeConfig.AgentConfig,
+				},
+			}
+			kataLog.WithField("factory", factoryConfig).Info("load vm factory")
+			f, err := vf.NewFactory(factoryConfig, true)
+			if err != nil {
+				fmt.Println("vm factory is off")
+			} else {
+				f.CloseFactory()
+				fmt.Println("vm factory is on")
+			}
+		} else {
+			fmt.Println("vm factory not enabled")
+		}
+		return nil
+	},
+}

cli/factory_test.go

@@ -115,3 +115,39 @@ func TestFactoryCLIFunctionDestroy(t *testing.T) {
 	err = fn(ctx)
 	assert.Nil(err)
 }
+
+func TestFactoryCLIFunctionStatus(t *testing.T) {
+	assert := assert.New(t)
+
+	tmpdir, err := ioutil.TempDir("", "")
+	assert.NoError(err)
+	defer os.RemoveAll(tmpdir)
+
+	runtimeConfig, err := newTestRuntimeConfig(tmpdir, testConsole, true)
+	assert.NoError(err)
+
+	set := flag.NewFlagSet("", 0)
+
+	set.String("console-socket", "", "")
+
+	app := cli.NewApp()
+	ctx := cli.NewContext(app, set, nil)
+	app.Name = "foo"
+
+	// No template
+	ctx.App.Metadata = map[string]interface{}{
+		"runtimeConfig": runtimeConfig,
+	}
+	fn, ok := statusFactoryCommand.Action.(func(context *cli.Context) error)
+	assert.True(ok)
+	err = fn(ctx)
+	assert.Nil(err)
+
+	// With template
+	runtimeConfig.FactoryConfig.Template = true
+	runtimeConfig.HypervisorType = vc.MockHypervisor
+	runtimeConfig.AgentType = vc.NoopAgentType
+	ctx.App.Metadata["runtimeConfig"] = runtimeConfig
+	err = fn(ctx)
+	assert.Nil(err)
+}