github.1git.de/docker/cli@v26.1.3+incompatible/cli/command/swarm/join_token.go (about)

     1  package swarm
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  
     7  	"github.com/docker/cli/cli"
     8  	"github.com/docker/cli/cli/command"
     9  	"github.com/docker/docker/api/types/swarm"
    10  	"github.com/pkg/errors"
    11  	"github.com/spf13/cobra"
    12  )
    13  
    14  type joinTokenOptions struct {
    15  	role   string
    16  	rotate bool
    17  	quiet  bool
    18  }
    19  
    20  func newJoinTokenCommand(dockerCli command.Cli) *cobra.Command {
    21  	opts := joinTokenOptions{}
    22  
    23  	cmd := &cobra.Command{
    24  		Use:   "join-token [OPTIONS] (worker|manager)",
    25  		Short: "Manage join tokens",
    26  		Args:  cli.ExactArgs(1),
    27  		RunE: func(cmd *cobra.Command, args []string) error {
    28  			opts.role = args[0]
    29  			return runJoinToken(cmd.Context(), dockerCli, opts)
    30  		},
    31  		Annotations: map[string]string{
    32  			"version": "1.24",
    33  			"swarm":   "manager",
    34  		},
    35  	}
    36  
    37  	flags := cmd.Flags()
    38  	flags.BoolVar(&opts.rotate, flagRotate, false, "Rotate join token")
    39  	flags.BoolVarP(&opts.quiet, flagQuiet, "q", false, "Only display token")
    40  
    41  	return cmd
    42  }
    43  
    44  func runJoinToken(ctx context.Context, dockerCli command.Cli, opts joinTokenOptions) error {
    45  	worker := opts.role == "worker"
    46  	manager := opts.role == "manager"
    47  
    48  	if !worker && !manager {
    49  		return errors.New("unknown role " + opts.role)
    50  	}
    51  
    52  	client := dockerCli.Client()
    53  
    54  	if opts.rotate {
    55  		flags := swarm.UpdateFlags{
    56  			RotateWorkerToken:  worker,
    57  			RotateManagerToken: manager,
    58  		}
    59  
    60  		sw, err := client.SwarmInspect(ctx)
    61  		if err != nil {
    62  			return err
    63  		}
    64  
    65  		if err := client.SwarmUpdate(ctx, sw.Version, sw.Spec, flags); err != nil {
    66  			return err
    67  		}
    68  
    69  		if !opts.quiet {
    70  			fmt.Fprintf(dockerCli.Out(), "Successfully rotated %s join token.\n\n", opts.role)
    71  		}
    72  	}
    73  
    74  	// second SwarmInspect in this function,
    75  	// this is necessary since SwarmUpdate after first changes the join tokens
    76  	sw, err := client.SwarmInspect(ctx)
    77  	if err != nil {
    78  		return err
    79  	}
    80  
    81  	if opts.quiet && worker {
    82  		fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Worker)
    83  		return nil
    84  	}
    85  
    86  	if opts.quiet && manager {
    87  		fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Manager)
    88  		return nil
    89  	}
    90  
    91  	info, err := client.Info(ctx)
    92  	if err != nil {
    93  		return err
    94  	}
    95  
    96  	return printJoinCommand(ctx, dockerCli, info.Swarm.NodeID, worker, manager)
    97  }
    98  
    99  func printJoinCommand(ctx context.Context, dockerCli command.Cli, nodeID string, worker bool, manager bool) error {
   100  	client := dockerCli.Client()
   101  
   102  	node, _, err := client.NodeInspectWithRaw(ctx, nodeID)
   103  	if err != nil {
   104  		return err
   105  	}
   106  
   107  	sw, err := client.SwarmInspect(ctx)
   108  	if err != nil {
   109  		return err
   110  	}
   111  
   112  	if node.ManagerStatus != nil {
   113  		if worker {
   114  			fmt.Fprintf(dockerCli.Out(), "To add a worker to this swarm, run the following command:\n\n    docker swarm join --token %s %s\n\n", sw.JoinTokens.Worker, node.ManagerStatus.Addr)
   115  		}
   116  		if manager {
   117  			fmt.Fprintf(dockerCli.Out(), "To add a manager to this swarm, run the following command:\n\n    docker swarm join --token %s %s\n\n", sw.JoinTokens.Manager, node.ManagerStatus.Addr)
   118  		}
   119  	}
   120  
   121  	return nil
   122  }