add create command

discovery/client.go

@@ -3,6 +3,7 @@ package discovery
 import (
 	"encoding/json"
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"strings"
 )
@@ -38,3 +39,13 @@ func RegisterSlave(addr, token string) error {
 	_, err := http.Post(fmt.Sprintf("%s/%s/%s", DISCOVERY_URL, "clusters", token), "application/json", buf)
 	return err
 }
+
+// CreateCluster returns a unique cluster token
+func CreateCluster() (string, error) {
+	resp, err := http.Post(fmt.Sprintf("%s/%s", DISCOVERY_URL, "clusters"), "", nil)
+	if err != nil {
+		return "", err
+	}
+	token, err := ioutil.ReadAll(resp.Body)
+	return string(token), err
+}

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 	"time"
 
@@ -60,6 +61,19 @@ func main() {
 	}
 
 	app.Commands = []cli.Command{
+		{
+			Name:      "create",
+			ShortName: "c",
+			Usage:     "create a cluster",
+
+			Action: func(c *cli.Context) {
+				token, err := discovery.CreateCluster()
+				if err != nil {
+					log.Fatal(err)
+				}
+				fmt.Println(token)
+			},
+		},
 		{
 			Name:      "manage",
 			ShortName: "m",
@@ -144,5 +158,7 @@ func main() {
 		},
 	}
 
-	log.Fatal(app.Run(os.Args))
+	if err := app.Run(os.Args); err != nil {
+		log.Fatal(err)
+	}
 }