Docker Swarm Code Analysis Note (3)--swarm Create

This is a creation in Article, where the information may have evolved or changed.

Docker SwarmThe create command code is simple:

func create(c *cli.Context) {    if len(c.Args()) != 0 {        log.Fatalf("the `create` command takes no arguments. See '%s create --help'.", c.App.Name)    }    discovery := &token.Discovery{}    discovery.Initialize("", 0, 0, nil)    token, err := discovery.CreateCluster()    if err != nil {        log.Fatal(err)    }    fmt.Println(token)}

and token.CreateCluster() the implementation of the function:

// CreateCluster returns a unique cluster tokenfunc (s *Discovery) CreateCluster() (string, error) {    resp, err := http.Post(fmt.Sprintf("%s/%s", s.url, "clusters"), "", nil)    if err != nil {        return "", err    }    defer resp.Body.Close()    token, err := ioutil.ReadAll(resp.Body)    return string(token), err}

is actually to https://discovery.hub.docker.com/v1/clusters send a https post request, and then get the only one token , use this token to create and manage cluster .