add back "/cluster/status"

fix https://github.com/chrislusf/seaweedfs/issues/870

weed/command/master.go

@@ -97,6 +97,7 @@ func runMaster(cmd *Command, args []string) bool {
 		raftServer := weed_server.NewRaftServer(security.LoadClientTLS(viper.Sub("grpc"), "master"),
 			peers, myMasterAddress, *metaFolder, ms.Topo, *mpulse)
 		ms.SetRaftServer(raftServer)
+		r.HandleFunc("/cluster/status", raftServer.StatusHandler).Methods("GET")
 
 		// starting grpc server
 		grpcPort := *mport + 10000

weed/command/server.go

@@ -187,6 +187,7 @@ func runServer(cmd *Command, args []string) bool {
 			raftServer := weed_server.NewRaftServer(security.LoadClientTLS(viper.Sub("grpc"), "master"),
 				peers, myMasterAddress, *masterMetaFolder, ms.Topo, *pulseSeconds)
 			ms.SetRaftServer(raftServer)
+			r.HandleFunc("/cluster/status", raftServer.StatusHandler).Methods("GET")
 
 			// starting grpc server
 			grpcPort := *masterPort + 10000

weed/server/raft_server_handlers.go

@@ -0,0 +1,22 @@
+package weed_server
+
+import (
+	"net/http"
+)
+
+type ClusterStatusResult struct {
+	IsLeader bool     `json:"IsLeader,omitempty"`
+	Leader   string   `json:"Leader,omitempty"`
+	Peers    []string `json:"Peers,omitempty"`
+}
+
+func (s *RaftServer) StatusHandler(w http.ResponseWriter, r *http.Request) {
+	ret := ClusterStatusResult{
+		IsLeader: s.topo.IsLeader(),
+		Peers:    s.Peers(),
+	}
+	if leader, e := s.topo.Leader(); e == nil {
+		ret.Leader = leader
+	}
+	writeJsonQuiet(w, r, http.StatusOK, ret)
+}