Golang ssh.NewTunnelledSSHClient函数代码示例

func printUnitStatus(c *cli.Context, jobName string) {
	js := registryCtl.GetJobState(jobName)

	if js == nil {
		fmt.Printf("%s does not appear to be running\n", jobName)
		syscall.Exit(1)
	}

	addr := fmt.Sprintf("%s:22", js.MachineState.PublicIP)

	var err error
	var sshClient *ssh.SSHForwardingClient

	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), false)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), false)
	}
	if err != nil {
		log.Fatal(err.Error())
	}

	defer sshClient.Close()

	cmd := fmt.Sprintf("systemctl status -l %s", jobName)
	channel, err := ssh.Execute(sshClient, cmd)
	if err != nil {
		log.Fatalf("Unable to execute command over SSH: %s", err.Error())
	}

	readSSHChannel(channel)
}

func runSSH(args []string) (exit int) {
	if flagUnit != "" && flagMachine != "" {
		fmt.Fprintln(os.Stderr, "Both machine and unit flags provided, please specify only one.")
		return 1
	}

	var err error
	var addr string

	switch {
	case flagMachine != "":
		addr, _ = findAddressInMachineList(flagMachine)
	case flagUnit != "":
		addr, _ = findAddressInRunningUnits(flagUnit)
	default:
		addr, err = globalMachineLookup(args)
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
			return 1
		}
		// trim machine/unit name from args
		if len(args) > 0 {
			args = args[1:]
		}
	}

	if addr == "" {
		fmt.Fprintln(os.Stderr, "Requested machine could not be found.")
		return 1
	}

	args = pkg.TrimToDashes(args)

	var sshClient *ssh.SSHForwardingClient
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), flagSSHAgentForwarding)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), flagSSHAgentForwarding)
	}
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed building SSH client: %v\n", err)
		return 1
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		err, exit = ssh.Execute(sshClient, cmd)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Failed running command over SSH: %v\n", err)
		}
	} else {
		if err := ssh.Shell(sshClient); err != nil {
			fmt.Fprintf(os.Stderr, "Failed opening shell over SSH: %v\n", err)
			exit = 1
		}
	}
	return
}

func sshAction(c *cli.Context) {
	unit := c.String("unit")
	machine := c.String("machine")

	if unit != "" && machine != "" {
		log.Fatal("Both flags, machine and unit provided, please specify only one")
	}

	args := c.Args()
	var err error
	var addr string

	switch {
	case machine != "":
		addr, _ = findAddressInMachineList(machine)
	case unit != "":
		addr, _ = findAddressInRunningUnits(unit)
	default:
		addr, err = globalMachineLookup(args)
		args = args[1:]
	}

	if err != nil {
		log.Fatal(err)
	}

	if addr == "" {
		log.Fatalf("Requested machine could not be found")
	}

	agentForwarding := c.Bool("agent")

	var sshClient *ssh.SSHForwardingClient
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), agentForwarding)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), agentForwarding)
	}
	if err != nil {
		log.Fatal(err.Error())
		return
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		channel, err := ssh.Execute(sshClient, cmd)
		if err != nil {
			log.Fatalf("Unable to run command over SSH: %s", err.Error())
		}

		readSSHChannel(channel)
	} else {
		if err := ssh.Shell(sshClient); err != nil {
			log.Fatalf(err.Error())
		}
	}
}

func journalAction(c *cli.Context) {
	if len(c.Args()) != 1 {
		fmt.Println("One unit file must be provided.")
		syscall.Exit(1)
	}
	jobName := c.Args()[0]

	js := registryCtl.GetJobState(jobName)

	if js == nil {
		fmt.Printf("%s does not appear to be running\n", jobName)
		syscall.Exit(1)
	}

	addr := fmt.Sprintf("%s:22", js.MachineState.PublicIP)

	var err error
	var sshClient *gossh.ClientConn
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr)
	}
	if err != nil {
		log.Fatal(err.Error())
	}

	defer sshClient.Close()

	cmd := fmt.Sprintf("journalctl -u %s --no-pager -l -n %d", jobName, c.Int("lines"))
	if c.Bool("follow") {
		cmd += " -f"
	}
	stdout, err := ssh.Execute(sshClient, cmd)
	if err != nil {
		log.Fatalf("Unable to run command over SSH: %s", err.Error())
	}

	for true {
		bytes, prefix, err := stdout.ReadLine()
		if err != nil {
			break
		}

		fmt.Print(string(bytes))
		if !prefix {
			fmt.Print("\n")
		}
	}
}

// runRemoteCommand runs the given command over SSH on the given IP, and returns
// any error encountered and the exit status of the command
func runRemoteCommand(cmd string, addr string) (err error, exit int) {
	var sshClient *ssh.SSHForwardingClient
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), false)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), false)
	}
	if err != nil {
		return err, -1
	}

	defer sshClient.Close()

	return ssh.Execute(sshClient, cmd)
}

// runRemoteCommand runs the given command over SSH on the given IP, and returns
// any error encountered and the exit status of the command
func runRemoteCommand(cmd string, addr string, timeout time.Duration) (exit int, err error) {
	var sshClient *ssh.SSHForwardingClient
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), false, timeout)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), false, timeout)
	}
	if err != nil {
		return -1, err
	}

	defer sshClient.Close()

	err, exit = ssh.Execute(sshClient, cmd)
	return
}

// runRemoteCommand runs the given command over SSH on the given IP, and returns
// any error encountered and the exit status of the command
func runRemoteCommand(cmd string, addr string) (err error, exit int) {
	var sshClient *ssh.SSHForwardingClient
	timeout := getSSHTimeoutFlag()
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient(globalFlags.SSHUserName, tun, addr, getChecker(), false, timeout)
	} else {
		sshClient, err = ssh.NewSSHClient(globalFlags.SSHUserName, addr, getChecker(), false, timeout)
	}
	if err != nil {
		return err, -1
	}

	defer sshClient.Close()

	return ssh.Execute(sshClient, cmd)
}

// SSH opens an interactive shell to a machine in the cluster
func (c *FleetClient) SSH(name string) (err error) {
	var sshClient *ssh.SSHForwardingClient

	timeout := time.Duration(Flags.SSHTimeout*1000) * time.Millisecond

	ms, err := c.machineState(name)
	if err != nil {
		return err
	}

	// If name isn't a machine ID, try it as a unit instead
	if ms == nil {
		units, err := c.Units(name)

		if err != nil {
			return err
		}

		machID, err := c.findUnit(units[0])

		if err != nil {
			return err
		}

		ms, err = c.machineState(machID)

		if err != nil || ms == nil {
			return err
		}
	}

	addr := ms.PublicIP

	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), false, timeout)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), false, timeout)
	}
	if err != nil {
		return err
	}

	defer sshClient.Close()
	err = ssh.Shell(sshClient)
	return err
}

func printUnitStatus(c *cli.Context, r *registry.Registry, jobName string) {
	js := r.GetJobState(jobName)

	if js == nil {
		fmt.Printf("%s does not appear to be running\n", jobName)
		syscall.Exit(1)
	}

	addr := fmt.Sprintf("%s:22", js.MachineState.PublicIP)

	var err error
	var sshClient *gossh.ClientConn
	if tun := getTunnelFlag(c); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr)
	}
	if err != nil {
		log.Fatalf("Unable to establish SSH connection: %v", err)
	}

	defer sshClient.Close()

	cmd := fmt.Sprintf("systemctl status -l %s", jobName)
	stdout, err := ssh.Execute(sshClient, cmd)
	if err != nil {
		log.Fatalf("Unable to execute command over SSH: %s", err.Error())
	}

	for true {
		bytes, prefix, err := stdout.ReadLine()
		if err != nil {
			break
		}

		print(string(bytes))
		if !prefix {
			print("\n")
		}
	}
}

// runRemoteCommand runs the given command over SSH on the given IP, and returns
// any error encountered and the exit status of the command
func runRemoteCommand(cCmd *cobra.Command, addr string, cmd string, args ...string) (err error, exit int) {
	var sshClient *ssh.SSHForwardingClient
	timeout := getSSHTimeoutFlag(cCmd)
	if tun := getTunnelFlag(cCmd); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient(globalFlags.SSHUserName, tun, addr, getChecker(cCmd), false, timeout)
	} else {
		sshClient, err = ssh.NewSSHClient(globalFlags.SSHUserName, addr, getChecker(cCmd), false, timeout)
	}
	if err != nil {
		return err, -1
	}

	cmdargs := cmd
	for _, arg := range args {
		cmdargs += fmt.Sprintf(" %q", arg)
	}

	defer sshClient.Close()

	return ssh.Execute(sshClient, cmdargs)
}

func runRemoteCommand(cmd string, ip string) (*ssh.Channel, error) {
	addr := fmt.Sprintf("%s:22", ip)

	var sshClient *ssh.SSHForwardingClient
	var err error
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), false)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), false)
	}
	if err != nil {
		return nil, err
	}

	defer sshClient.Close()

	channel, err := ssh.Execute(sshClient, cmd)
	if err != nil {
		return nil, err
	}
	return channel, nil
}

func (c *FleetClient) sshConnect(name string) (*ssh.SSHForwardingClient, *machine.MachineState, error) {

	timeout := time.Duration(Flags.SSHTimeout*1000) * time.Millisecond

	ms, err := c.machineState(name)
	if err != nil {
		return nil, nil, err
	}

	// If name isn't a machine ID, try it as a unit instead
	if ms == nil {
		units, err := c.Units(name)

		if err != nil {
			return nil, nil, err
		}

		machID, err := c.findUnit(units[0])

		if err != nil {
			return nil, nil, err
		}

		ms, err = c.machineState(machID)

		if err != nil || ms == nil {
			return nil, nil, err
		}
	}

	addr := ms.PublicIP

	if tun := getTunnelFlag(); tun != "" {
		sshClient, err := ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), false, timeout)
		return sshClient, ms, err
	}
	sshClient, err := ssh.NewSSHClient("core", addr, getChecker(), false, timeout)
	return sshClient, ms, err
}

func sshAction(c *cli.Context) {
	unit := c.String("unit")
	machine := c.String("machine")

	if unit != "" && machine != "" {
		log.Fatal("Both flags, machine and unit provided, please specify only one")
	}

	args := c.Args()
	var err error
	var addr string

	switch {
	case machine != "":
		addr, _ = findAddressInMachineList(machine)
	case unit != "":
		addr, _ = findAddressInRunningUnits(unit)
	default:
		addr, err = globalMachineLookup(args)
		args = args[1:]
	}

	if err != nil {
		log.Fatal(err)
	}

	if addr == "" {
		log.Fatalf("Requested machine could not be found")
	}

	var sshClient *gossh.ClientConn
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr)
	}
	if err != nil {
		log.Fatal(err.Error())
		return
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		stdout, err := ssh.Execute(sshClient, cmd)
		if err != nil {
			log.Fatalf("Unable to run command over SSH: %s", err.Error())
		}

		for {
			bytes, prefix, err := stdout.ReadLine()
			if err != nil {
				break
			}

			fmt.Print(string(bytes))
			if !prefix {
				fmt.Print("\n")
			}
		}

	} else {
		if err := ssh.Shell(sshClient); err != nil {
			log.Fatalf(err.Error())
		}
	}
}

func runSSH(args []string) (exit int) {
	if flagUnit != "" && flagMachine != "" {
		stderr("Both machine and unit flags provided, please specify only one.")
		return 1
	}

	var err error
	var addr string

	switch {
	case flagMachine != "":
		addr, _, err = findAddressInMachineList(flagMachine)
	case flagUnit != "":
		addr, _, err = findAddressInRunningUnits(flagUnit)
	default:
		addr, err = globalMachineLookup(args)
		// trim machine/unit name from args
		if len(args) > 0 {
			args = args[1:]
		}
	}

	if err != nil {
		stderr("Unable to proceed: %v", err)
		return 1
	}

	if addr == "" {
		stderr("Could not determine address of machine.")
		return 1
	}

	args = pkg.TrimToDashes(args)

	var sshClient *ssh.SSHForwardingClient
	timeout := getSSHTimeoutFlag()
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient(globalFlags.SSHUserName, tun, addr, getChecker(), flagSSHAgentForwarding, timeout)
	} else {
		sshClient, err = ssh.NewSSHClient(globalFlags.SSHUserName, addr, getChecker(), flagSSHAgentForwarding, timeout)
	}
	if err != nil {
		stderr("Failed building SSH client: %v", err)
		return 1
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		err, exit = ssh.Execute(sshClient, cmd)
		if err != nil {
			stderr("Failed running command over SSH: %v", err)
		}
	} else {
		if err := ssh.Shell(sshClient); err != nil {
			stderr("Failed opening shell over SSH: %v", err)
			exit = 1
		}
	}
	return
}

func sshAction(c *cli.Context) {
	r := getRegistry(c)

	args := c.Args()
	unit := c.String("unit")
	if len(args) == 0 && unit == "" {
		log.Fatalf("Provide one machine or unit")
	}

	var addr string
	if unit == "" {
		lookup := args[0]
		args = args[1:]
		states := r.GetActiveMachines()
		var match *machine.MachineState
		for i, _ := range states {
			machState := states[i]
			if !strings.HasPrefix(machState.BootId, lookup) {
				continue
			} else if match != nil {
				log.Fatalf("Found more than one Machine, be more specfic")
			}
			match = &machState
		}

		if match == nil {
			log.Fatalf("Could not find provided Machine")
		}

		addr = fmt.Sprintf("%s:22", match.PublicIP)
	} else {
		js := r.GetJobState(unit)
		if js == nil {
			log.Fatalf("Requested unit %s does not appear to be running", unit)
		}
		addr = fmt.Sprintf("%s:22", js.MachineState.PublicIP)
	}

	var err error
	var sshClient *gossh.ClientConn
	if tun := getTunnelFlag(c); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr)
	}
	if err != nil {
		log.Fatalf("Unable to establish SSH connection: %v", err)
		return
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		stdout, err := ssh.Execute(sshClient, cmd)
		if err != nil {
			log.Fatalf("Unable to run command over SSH: %s", err.Error())
		}

		for {
			bytes, prefix, err := stdout.ReadLine()
			if err != nil {
				break
			}

			print(string(bytes))
			if !prefix {
				print("\n")
			}
		}

	} else {
		if err := ssh.Shell(sshClient); err != nil {
			log.Fatalf(err.Error())
		}
	}
}