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package swarm
import (
"fmt"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
type joinTokenOptions struct {
role string
rotate bool
quiet bool
}
func newJoinTokenCommand(dockerCli command.Cli) *cobra.Command {
opts := joinTokenOptions{}
cmd := &cobra.Command{
Use: "join-token [OPTIONS] (worker|manager)",
Short: "Manage join tokens",
Args: cli.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
opts.role = args[0]
return runJoinToken(dockerCli, opts)
},
}
flags := cmd.Flags()
flags.BoolVar(&opts.rotate, flagRotate, false, "Rotate join token")
flags.BoolVarP(&opts.quiet, flagQuiet, "q", false, "Only display token")
return cmd
}
func runJoinToken(dockerCli command.Cli, opts joinTokenOptions) error {
worker := opts.role == "worker"
manager := opts.role == "manager"
if !worker && !manager {
return errors.New("unknown role " + opts.role)
}
client := dockerCli.Client()
ctx := context.Background()
if opts.rotate {
flags := swarm.UpdateFlags{
RotateWorkerToken: worker,
RotateManagerToken: manager,
}
sw, err := client.SwarmInspect(ctx)
if err != nil {
return err
}
if err := client.SwarmUpdate(ctx, sw.Version, sw.Spec, flags); err != nil {
return err
}
if !opts.quiet {
fmt.Fprintf(dockerCli.Out(), "Successfully rotated %s join token.\n\n", opts.role)
}
}
// second SwarmInspect in this function,
// this is necessary since SwarmUpdate after first changes the join tokens
sw, err := client.SwarmInspect(ctx)
if err != nil {
return err
}
if opts.quiet && worker {
fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Worker)
return nil
}
if opts.quiet && manager {
fmt.Fprintln(dockerCli.Out(), sw.JoinTokens.Manager)
return nil
}
info, err := client.Info(ctx)
if err != nil {
return err
}
return printJoinCommand(ctx, dockerCli, info.Swarm.NodeID, worker, manager)
}
func printJoinCommand(ctx context.Context, dockerCli command.Cli, nodeID string, worker bool, manager bool) error {
client := dockerCli.Client()
node, _, err := client.NodeInspectWithRaw(ctx, nodeID)
if err != nil {
return err
}
sw, err := client.SwarmInspect(ctx)
if err != nil {
return err
}
if node.ManagerStatus != nil {
if worker {
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)
}
if manager {
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)
}
}
return nil
}
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