Golang log.Fatal函数代码示例

func cmdScp(c *cli.Context) {
	args := c.Args()
	if len(args) != 2 {
		cli.ShowCommandHelp(c, "scp")
		log.Fatal("Improper number of arguments.")
	}

	// TODO: Check that "-3" flag is available in user's version of scp.
	// It is on every system I've checked, but the manual mentioned it's "newer"
	sshArgs := append(baseSSHArgs, "-3")

	if c.Bool("recursive") {
		sshArgs = append(sshArgs, "-r")
	}

	src := args[0]
	dest := args[1]

	store := getStore(c)
	cmd, err := getScpCmd(src, dest, sshArgs, store)

	if err != nil {
		log.Fatal(err)
	}
	if err := runCmdWithStdIo(*cmd); err != nil {
		log.Fatal(err)
	}
}

func cmdSsh(c *cli.Context) {
	args := c.Args()
	name := args.First()

	if name == "" {
		log.Fatal("Error: Please specify a machine name.")
	}

	store := getStore(c)
	host, err := store.Load(name)
	if err != nil {
		log.Fatal(err)
	}

	currentState, err := host.Driver.GetState()
	if err != nil {
		log.Fatal(err)
	}

	if currentState != state.Running {
		log.Fatalf("Error: Cannot run SSH command: Host %q is not running", host.Name)
	}

	client, err := host.CreateSSHClient()
	if err != nil {
		log.Fatal(err)
	}

	if err := client.Shell(c.Args().Tail()...); err != nil {
		log.Fatal(err)
	}
}

func cmdInspect(c *cli.Context) {
	tmplString := c.String("format")
	if tmplString != "" {
		var tmpl *template.Template
		var err error
		if tmpl, err = template.New("").Funcs(funcMap).Parse(tmplString); err != nil {
			log.Fatalf("Template parsing error: %v\n", err)
		}

		jsonHost, err := json.Marshal(getFirstArgHost(c))
		if err != nil {
			log.Fatal(err)
		}
		obj := make(map[string]interface{})
		if err := json.Unmarshal(jsonHost, &obj); err != nil {
			log.Fatal(err)
		}

		if err := tmpl.Execute(os.Stdout, obj); err != nil {
			log.Fatal(err)
		}
		os.Stdout.Write([]byte{'\n'})
	} else {
		prettyJSON, err := json.MarshalIndent(getFirstArgHost(c), "", "    ")
		if err != nil {
			log.Fatal(err)
		}

		fmt.Println(string(prettyJSON))
	}
}

func cmdUrl(c *cli.Context) {
	if len(c.Args()) != 1 {
		log.Fatal(ErrExpectedOneMachine)
	}
	url, err := getFirstArgHost(c).GetURL()
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(url)
}

func fatalOnError(command func(context *cli.Context) error) func(context *cli.Context) {
	return func(context *cli.Context) {
		if err := command(context); err != nil {
			log.Fatal(err)
		}
	}
}

func fatalOnError(command func(commandLine CommandLine) error) func(context *cli.Context) {
	return func(context *cli.Context) {
		if err := command(&contextCommandLine{context}); err != nil {
			log.Fatal(err)
		}
	}
}

func fatalOnError(command func(commandLine CommandLine, api libmachine.API) error) func(context *cli.Context) {
	return func(context *cli.Context) {
		api := libmachine.NewClient(mcndirs.GetBaseDir())

		if context.GlobalBool("native-ssh") {
			api.SSHClientType = ssh.Native
		}
		api.GithubAPIToken = context.GlobalString("github-api-token")
		api.Filestore.Path = context.GlobalString("storage-path")

		crashreport.Configure(context.GlobalString("bugsnag-api-token"))

		// TODO (nathanleclaire): These should ultimately be accessed
		// through the libmachine client by the rest of the code and
		// not through their respective modules.  For now, however,
		// they are also being set the way that they originally were
		// set to preserve backwards compatibility.
		mcndirs.BaseDir = api.Filestore.Path
		mcnutils.GithubAPIToken = api.GithubAPIToken
		ssh.SetDefaultClient(api.SSHClientType)

		defer rpcdriver.CloseDrivers()

		if err := command(&contextCommandLine{context}, api); err != nil {
			log.Fatal(err)
		}
	}
}

func NewRpcClientDriver(rawDriverData []byte, driverName string) (*RpcClientDriver, error) {
	mcnName := ""

	p := localbinary.NewLocalBinaryPlugin(driverName)

	go func() {
		if err := p.Serve(); err != nil {
			// If we can't safely load the server, best to just
			// bail.
			log.Fatal(err)
		}
	}()

	addr, err := p.Address()
	if err != nil {
		return nil, fmt.Errorf("Error attempting to get plugin server address for RPC: %s", err)
	}

	rpcclient, err := rpc.DialHTTP("tcp", addr)
	if err != nil {
		return nil, err
	}

	c := &RpcClientDriver{
		Client:          NewInternalClient(rpcclient),
		heartbeatDoneCh: make(chan bool),
	}

	go func(heartbeatDoneCh <-chan bool) {
		for {
			select {
			case <-heartbeatDoneCh:
				return
			default:
				if err := c.Client.Call("RpcServerDriver.Heartbeat", struct{}{}, nil); err != nil {
					log.Warnf("Error attempting heartbeat call to plugin server: %s", err)
				}
				time.Sleep(heartbeatInterval)
			}
		}
	}(c.heartbeatDoneCh)

	var version int
	if err := c.Client.Call("RpcServerDriver.GetVersion", struct{}{}, &version); err != nil {
		return nil, err
	}
	log.Debug("Using API Version ", version)

	if err := c.SetConfigRaw(rawDriverData); err != nil {
		return nil, err
	}

	mcnName = c.GetMachineName()
	p.MachineName = mcnName
	c.Client.MachineName = mcnName
	c.plugin = p

	return c, nil
}

func cmdUrl(c *cli.Context) {
	url, err := getFirstArgHost(c).GetURL()
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(url)
}

func DumpVal(vals ...interface{}) {
	for _, val := range vals {
		prettyJSON, err := json.MarshalIndent(val, "", "    ")
		if err != nil {
			log.Fatal(err)
		}
		log.Debug(string(prettyJSON))
	}
}

func runCmdWithStdIo(cmd exec.Cmd) error {
	cmd.Stdin = os.Stdin
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		log.Fatal(err)
	}
	return nil
}

func cmdRegenerateCerts(c *cli.Context) {
	force := c.Bool("force")
	if force || confirmInput("Regenerate TLS machine certs?  Warning: this is irreversible.") {
		log.Infof("Regenerating TLS certificates")
		if err := runActionWithContext("configureAuth", c); err != nil {
			log.Fatal(err)
		}
	}
}

func main() {
	libmachine.SetDebug(true)

	log.SetOutWriter(os.Stdout)
	log.SetErrWriter(os.Stderr)

	// returns the familiar store at $HOME/.docker/machine
	store := libmachine.GetDefaultStore()

	// over-ride this for now (don't want to muck with my default store)
	store.Path = "/tmp/automatic"

	hostName := "myfunhost"

	// Set some options on the provider...
	driver := virtualbox.NewDriver(hostName, "/tmp/automatic")
	driver.CPU = 2
	driver.Memory = 2048

	h, err := store.NewHost(driver)
	if err != nil {
		log.Fatal(err)
	}

	h.HostOptions.EngineOptions.StorageDriver = "overlay"

	if err := libmachine.Create(store, h); err != nil {
		log.Fatal(err)
	}

	out, err := h.RunSSHCommand("df -h")
	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("Results of your disk space query:\n%s\n", out)

	fmt.Println("Powering down machine now...")
	if err := h.Stop(); err != nil {
		log.Fatal(err)
	}
}

func cmdStatus(c *cli.Context) {
	if len(c.Args()) != 1 {
		log.Fatal(ErrExpectedOneMachine)
	}
	host := getFirstArgHost(c)
	currentState, err := host.Driver.GetState()
	if err != nil {
		log.Errorf("error getting state for host %s: %s", host.Name, err)
	}
	log.Info(currentState)
}

func main() {
	log.SetDebug(true)

	client := libmachine.NewClient("/tmp/automatic", "/tmp/automatic/certs")
	defer client.Close()

	hostName := "myfunhost"

	// Set some options on the provider...
	driver := virtualbox.NewDriver(hostName, "/tmp/automatic")
	driver.CPU = 2
	driver.Memory = 2048

	data, err := json.Marshal(driver)
	if err != nil {
		log.Fatal(err)
	}

	h, err := client.NewHost("virtualbox", data)
	if err != nil {
		log.Fatal(err)
	}

	h.HostOptions.EngineOptions.StorageDriver = "overlay"

	if err := client.Create(h); err != nil {
		log.Fatal(err)
	}

	out, err := h.RunSSHCommand("df -h")
	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("Results of your disk space query:\n%s\n", out)

	fmt.Println("Powering down machine now...")
	if err := h.Stop(); err != nil {
		log.Fatal(err)
	}
}