add leader election in master

weed/server/master_grpc_server_cluster.go

@@ -12,8 +12,8 @@ func (ms *MasterServer) ListClusterNodes(ctx context.Context, req *master_pb.Lis
 
 	for _, node := range clusterNodes {
 		resp.ClusterNodes = append(resp.ClusterNodes, &master_pb.ListClusterNodesResponse_ClusterNode{
-			Address: string(node.address),
-			Version: node.version,
+			Address: string(node.Address),
+			Version: node.Version,
 		})
 	}
 	return resp, nil

weed/server/master_server.go

@@ -2,6 +2,7 @@ package weed_server
 
 import (
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/election"
 	"github.com/chrislusf/seaweedfs/weed/pb"
 	"net/http"
 	"net/http/httputil"
@@ -68,7 +69,7 @@ type MasterServer struct {
 
 	adminLocks *AdminLocks
 
-	Cluster *Cluster
+	Cluster *election.Cluster
 }
 
 func NewMasterServer(r *mux.Router, option *MasterOption, peers []pb.ServerAddress) *MasterServer {
@@ -105,7 +106,7 @@ func NewMasterServer(r *mux.Router, option *MasterOption, peers []pb.ServerAddre
 		grpcDialOption:  grpcDialOption,
 		MasterClient:    wdclient.NewMasterClient(grpcDialOption, "master", option.Master, "", peers),
 		adminLocks:      NewAdminLocks(),
-		Cluster:         NewCluster(),
+		Cluster:         election.NewCluster(),
 	}
 	ms.boundedLeaderChan = make(chan int, 16)
 

weed/server/master_server_cluster.go

@@ -1,77 +0,0 @@
-package weed_server
-
-import (
-	"github.com/chrislusf/seaweedfs/weed/pb"
-	"sync"
-)
-
-type NodeType int
-
-const (
-	filerNodeType NodeType = iota
-)
-
-type ClusterNode struct {
-	address pb.ServerAddress
-	version string
-	counter int
-}
-
-type Cluster struct {
-	filers     map[pb.ServerAddress]*ClusterNode
-	filersLock sync.RWMutex
-}
-
-func NewCluster() *Cluster {
-	return &Cluster{
-		filers: make(map[pb.ServerAddress]*ClusterNode),
-	}
-}
-
-func (cluster *Cluster) AddClusterNode(nodeType string, address pb.ServerAddress, version string) {
-	switch nodeType {
-	case "filer":
-		cluster.filersLock.Lock()
-		defer cluster.filersLock.Unlock()
-		if existingNode, found := cluster.filers[address]; found {
-			existingNode.counter++
-			return
-		}
-		cluster.filers[address] = &ClusterNode{
-			address: address,
-			version: version,
-			counter: 1,
-		}
-	case "master":
-	}
-}
-
-func (cluster *Cluster) RemoveClusterNode(nodeType string, address pb.ServerAddress) {
-	switch nodeType {
-	case "filer":
-		cluster.filersLock.Lock()
-		defer cluster.filersLock.Unlock()
-		if existingNode, found := cluster.filers[address]; !found {
-			return
-		} else {
-			existingNode.counter--
-			if existingNode.counter <= 0 {
-				delete(cluster.filers, address)
-			}
-		}
-	case "master":
-	}
-}
-
-func (cluster *Cluster) ListClusterNode(nodeType string) (nodes []*ClusterNode) {
-	switch nodeType {
-	case "filer":
-		cluster.filersLock.RLock()
-		defer cluster.filersLock.RUnlock()
-		for _, node := range cluster.filers {
-			nodes = append(nodes, node)
-		}
-	case "master":
-	}
-	return
-}