func runJoin(dockerCli command.Cli, flags *pflag.FlagSet, opts joinOptions) error {
client := dockerCli.Client()
ctx := context.Background()
req := swarm.JoinRequest{
JoinToken: opts.token,
ListenAddr: opts.listenAddr.String(),
AdvertiseAddr: opts.advertiseAddr,
RemoteAddrs: []string{opts.remote},
}
if flags.Changed(flagAvailability) {
availability := swarm.NodeAvailability(strings.ToLower(opts.availability))
switch availability {
case swarm.NodeAvailabilityActive, swarm.NodeAvailabilityPause, swarm.NodeAvailabilityDrain:
req.Availability = availability
default:
return fmt.Errorf("invalid availability %q, only active, pause and drain are supported", opts.availability)
}
}
err := client.SwarmJoin(ctx, req)
if err != nil {
return err
}
info, err := client.Info(ctx)
if err != nil {
return err
}
if info.Swarm.ControlAvailable {
fmt.Fprintln(dockerCli.Out(), "This node joined a swarm as a manager.")
} else {
fmt.Fprintln(dockerCli.Out(), "This node joined a swarm as a worker.")
}
return nil
}
// Join joins a daemon to an existing cluster.
func (d *SwarmDaemon) Join(req swarm.JoinRequest) error {
if req.ListenAddr == "" {
req.ListenAddr = d.listenAddr
}
status, out, err := d.SockRequest("POST", "/swarm/join", req)
if status != http.StatusOK {
return fmt.Errorf("joining swarm: invalid statuscode %v, %q", status, out)
}
if err != nil {
return fmt.Errorf("joining swarm: %v", err)
}
info, err := d.info()
if err != nil {
return err
}
d.Info = info
return nil
}