github.com/justincormack/cli@v0.0.0-20201215022714-831ebeae9675/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(dockerCli, opts)
    30  		},
    31  	}
    32  
    33  	flags := cmd.Flags()
    34  	flags.BoolVar(&opts.rotate, flagRotate, false, "Rotate join token")
    35  	flags.BoolVarP(&opts.quiet, flagQuiet, "q", false, "Only display token")
    36  
    37  	return cmd
    38  }
    39  
    40  func runJoinToken(dockerCli command.Cli, opts joinTokenOptions) error {
    41  	worker := opts.role == "worker"
    42  	manager := opts.role == "manager"
    43  
    44  	if !worker && !manager {
    45  		return errors.New("unknown role " + opts.role)
    46  	}
    47  
    48  	client := dockerCli.Client()
    49  	ctx := context.Background()
    50  
    51  	if opts.rotate {
    52  		flags := swarm.UpdateFlags{
    53  			RotateWorkerToken:  worker,
    54  			RotateManagerToken: manager,
    55  		}
    56  
    57  		sw, err := client.SwarmInspect(ctx)
    58  		if err != nil {
    59  			return err
    60  		}
    61  
    62  		if err := client.SwarmUpdate(ctx, sw.Version, sw.Spec, flags); err != nil {
    63  			return err
    64  		}
    65  
    66  		if !opts.quiet {
    67  			fmt.Fprintf(dockerCli.Out(), "Successfully rotated %s join token.\n\n", opts.role)
    68  		}
    69  	}
    70  
    71  	// second SwarmInspect in this function,
    72  	// this is necessary since SwarmUpdate after first changes the join tokens
    73  	sw, err := client.SwarmInspect(ctx)
    74  	if err != nil {
    75  		return err
    76  	}
    77  
    78  	if opts.quiet && worker {
    79  		fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Worker)
    80  		return nil
    81  	}
    82  
    83  	if opts.quiet && manager {
    84  		fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Manager)
    85  		return nil
    86  	}
    87  
    88  	info, err := client.Info(ctx)
    89  	if err != nil {
    90  		return err
    91  	}
    92  
    93  	return printJoinCommand(ctx, dockerCli, info.Swarm.NodeID, worker, manager)
    94  }
    95  
    96  func printJoinCommand(ctx context.Context, dockerCli command.Cli, nodeID string, worker bool, manager bool) error {
    97  	client := dockerCli.Client()
    98  
    99  	node, _, err := client.NodeInspectWithRaw(ctx, nodeID)
   100  	if err != nil {
   101  		return err
   102  	}
   103  
   104  	sw, err := client.SwarmInspect(ctx)
   105  	if err != nil {
   106  		return err
   107  	}
   108  
   109  	if node.ManagerStatus != nil {
   110  		if worker {
   111  			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)
   112  		}
   113  		if manager {
   114  			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)
   115  		}
   116  	}
   117  
   118  	return nil
   119  }