github.com/flavio/docker@v0.1.3-0.20170117145210-f63d1a6eec47/cli/command/swarm/join_token.go (about)

     1  package swarm
     2  
     3  import (
     4  	"errors"
     5  	"fmt"
     6  
     7  	"github.com/spf13/cobra"
     8  
     9  	"github.com/docker/docker/api/types/swarm"
    10  	"github.com/docker/docker/cli"
    11  	"github.com/docker/docker/cli/command"
    12  	"golang.org/x/net/context"
    13  )
    14  
    15  type joinTokenOptions struct {
    16  	role   string
    17  	rotate bool
    18  	quiet  bool
    19  }
    20  
    21  func newJoinTokenCommand(dockerCli command.Cli) *cobra.Command {
    22  	opts := joinTokenOptions{}
    23  
    24  	cmd := &cobra.Command{
    25  		Use:   "join-token [OPTIONS] (worker|manager)",
    26  		Short: "Manage join tokens",
    27  		Args:  cli.ExactArgs(1),
    28  		RunE: func(cmd *cobra.Command, args []string) error {
    29  			opts.role = args[0]
    30  			return runJoinToken(dockerCli, opts)
    31  		},
    32  	}
    33  
    34  	flags := cmd.Flags()
    35  	flags.BoolVar(&opts.rotate, flagRotate, false, "Rotate join token")
    36  	flags.BoolVarP(&opts.quiet, flagQuiet, "q", false, "Only display token")
    37  
    38  	return cmd
    39  }
    40  
    41  func runJoinToken(dockerCli command.Cli, opts joinTokenOptions) error {
    42  	worker := opts.role == "worker"
    43  	manager := opts.role == "manager"
    44  
    45  	if !worker && !manager {
    46  		return errors.New("unknown role " + opts.role)
    47  	}
    48  
    49  	client := dockerCli.Client()
    50  	ctx := context.Background()
    51  
    52  	if opts.rotate {
    53  		flags := swarm.UpdateFlags{
    54  			RotateWorkerToken:  worker,
    55  			RotateManagerToken: manager,
    56  		}
    57  
    58  		sw, err := client.SwarmInspect(ctx)
    59  		if err != nil {
    60  			return err
    61  		}
    62  
    63  		if err := client.SwarmUpdate(ctx, sw.Version, sw.Spec, flags); err != nil {
    64  			return err
    65  		}
    66  
    67  		if !opts.quiet {
    68  			fmt.Fprintf(dockerCli.Out(), "Successfully rotated %s join token.\n\n", opts.role)
    69  		}
    70  	}
    71  
    72  	// second SwarmInspect in this function,
    73  	// this is necessary since SwarmUpdate after first changes the join tokens
    74  	sw, err := client.SwarmInspect(ctx)
    75  	if err != nil {
    76  		return err
    77  	}
    78  
    79  	if opts.quiet && worker {
    80  		fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Worker)
    81  		return nil
    82  	}
    83  
    84  	if opts.quiet && manager {
    85  		fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Manager)
    86  		return nil
    87  	}
    88  
    89  	info, err := client.Info(ctx)
    90  	if err != nil {
    91  		return err
    92  	}
    93  
    94  	return printJoinCommand(ctx, dockerCli, info.Swarm.NodeID, worker, manager)
    95  }
    96  
    97  func printJoinCommand(ctx context.Context, dockerCli command.Cli, nodeID string, worker bool, manager bool) error {
    98  	client := dockerCli.Client()
    99  
   100  	node, _, err := client.NodeInspectWithRaw(ctx, nodeID)
   101  	if err != nil {
   102  		return err
   103  	}
   104  
   105  	sw, err := client.SwarmInspect(ctx)
   106  	if err != nil {
   107  		return err
   108  	}
   109  
   110  	if node.ManagerStatus != nil {
   111  		if worker {
   112  			fmt.Fprintf(dockerCli.Out(), "To add a worker to this swarm, run the following command:\n\n    docker swarm join \\\n    --token %s \\\n    %s\n\n", sw.JoinTokens.Worker, node.ManagerStatus.Addr)
   113  		}
   114  		if manager {
   115  			fmt.Fprintf(dockerCli.Out(), "To add a manager to this swarm, run the following command:\n\n    docker swarm join \\\n    --token %s \\\n    %s\n\n", sw.JoinTokens.Manager, node.ManagerStatus.Addr)
   116  		}
   117  	}
   118  
   119  	return nil
   120  }