auto updated filer peer list

8 files changed, 210 insertions, 136 deletions

diff --git a/weed/election/cluster.go b/weed/election/cluster.go
index 7f247f2cf..cf77771ba 100644
--- a/weed/election/cluster.go
+++ b/weed/election/cluster.go
@@ -85,6 +85,10 @@ func (cluster *Cluster) ListClusterNode(nodeType string) (nodes []*ClusterNode)
 	return
 }
 
+func (cluster *Cluster) IsOneLeader(address pb.ServerAddress) bool {
+	return cluster.leaders.isOneLeader(address)
+}
+
 func (cluster *Cluster) ensureLeader(isAdd bool, nodeType string, address pb.ServerAddress) (result []*master_pb.KeepConnectedResponse) {
 	if isAdd {
 		if cluster.leaders.addLeaderIfVacant(address) {
diff --git a/weed/filer/filer.go b/weed/filer/filer.go
index 76d2f3f47..6dca3321f 100644
--- a/weed/filer/filer.go
+++ b/weed/filer/filer.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"os"
 	"strings"
 	"time"
@@ -66,22 +67,38 @@ func NewFiler(masters []pb.ServerAddress, grpcDialOption grpc.DialOption,
 	return f
 }
 
-func (f *Filer) AggregateFromPeers(self pb.ServerAddress, filers []pb.ServerAddress) {
+func (f *Filer) AggregateFromPeers(self pb.ServerAddress) {
 
-	// set peers
-	found := false
-	for _, peer := range filers {
-		if peer == self {
-			found = true
-		}
-	}
-	if !found {
-		filers = append(filers, self)
+	f.MetaAggregator = NewMetaAggregator(f, self, f.GrpcDialOption)
+	f.MasterClient.OnPeerUpdate = f.MetaAggregator.OnPeerUpdate
+
+	for _, peerUpdate := range f.ListExistingPeerUpdates() {
+		f.MetaAggregator.OnPeerUpdate(peerUpdate)
 	}
 
-	f.MetaAggregator = NewMetaAggregator(filers, f.GrpcDialOption)
-	f.MetaAggregator.StartLoopSubscribe(f, self)
+}
 
+func (f *Filer) ListExistingPeerUpdates() (existingNodes []*master_pb.ClusterNodeUpdate){
+
+	if grpcErr := pb.WithMasterClient(f.MasterClient.GetMaster(), f.GrpcDialOption, func(client master_pb.SeaweedClient) error {
+		resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
+			ClientType: "filer",
+		})
+
+		glog.V(0).Infof("the cluster has %d filers\n", len(resp.ClusterNodes))
+		for _, node := range resp.ClusterNodes {
+			existingNodes = append(existingNodes, &master_pb.ClusterNodeUpdate{
+				NodeType: "filer",
+				Address:  node.Address,
+				IsLeader: node.IsLeader,
+				IsAdd:    true,
+			})
+		}
+		return err
+	}); grpcErr != nil {
+		glog.V(0).Infof("connect to %s: %v", f.MasterClient.GetMaster(), grpcErr)
+	}
+	return
 }
 
 func (f *Filer) SetStore(store FilerStore) {
@@ -117,7 +134,7 @@ func (fs *Filer) GetMaster() pb.ServerAddress {
 	return fs.MasterClient.GetMaster()
 }
 
-func (fs *Filer) KeepConnectedToMaster() {
+func (fs *Filer) KeepMasterClientConnected() {
 	fs.MasterClient.KeepConnectedToMaster()
 }
 
diff --git a/weed/filer/meta_aggregator.go b/weed/filer/meta_aggregator.go
index eba2a044a..6e42b1902 100644
--- a/weed/filer/meta_aggregator.go
+++ b/weed/filer/meta_aggregator.go
@@ -3,6 +3,7 @@ package filer
 import (
 	"context"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"io"
 	"sync"
@@ -18,9 +19,13 @@ import (
 )
 
 type MetaAggregator struct {
-	filers         []pb.ServerAddress
-	grpcDialOption grpc.DialOption
-	MetaLogBuffer  *log_buffer.LogBuffer
+	filer           *Filer
+	self            pb.ServerAddress
+	isLeader        bool
+	grpcDialOption  grpc.DialOption
+	MetaLogBuffer   *log_buffer.LogBuffer
+	peerStatues     map[pb.ServerAddress]struct{}
+	peerStatuesLock sync.Mutex
 	// notifying clients
 	ListenersLock sync.Mutex
 	ListenersCond *sync.Cond
@@ -28,10 +33,12 @@ type MetaAggregator struct {
 
 // MetaAggregator only aggregates data "on the fly". The logs are not re-persisted to disk.
 // The old data comes from what each LocalMetadata persisted on disk.
-func NewMetaAggregator(filers []pb.ServerAddress, grpcDialOption grpc.DialOption) *MetaAggregator {
+func NewMetaAggregator(filer *Filer, self pb.ServerAddress, grpcDialOption grpc.DialOption) *MetaAggregator {
 	t := &MetaAggregator{
-		filers:         filers,
+		filer:          filer,
+		self:           self,
 		grpcDialOption: grpcDialOption,
+		peerStatues:    make(map[pb.ServerAddress]struct{}),
 	}
 	t.ListenersCond = sync.NewCond(&t.ListenersLock)
 	t.MetaLogBuffer = log_buffer.NewLogBuffer("aggr", LogFlushInterval, nil, func() {
@@ -40,10 +47,35 @@ func NewMetaAggregator(filers []pb.ServerAddress, grpcDialOption grpc.DialOption
 	return t
 }
 
-func (ma *MetaAggregator) StartLoopSubscribe(f *Filer, self pb.ServerAddress) {
-	for _, filer := range ma.filers {
-		go ma.subscribeToOneFiler(f, self, filer)
+func (ma *MetaAggregator) OnPeerUpdate(update *master_pb.ClusterNodeUpdate) {
+	if update.NodeType != "filer" {
+		return
 	}
+
+	address := pb.ServerAddress(update.Address)
+	if update.IsAdd {
+		// every filer should subscribe to a new filer
+		ma.setActive(address, true)
+		go ma.subscribeToOneFiler(ma.filer, ma.self, address)
+	} else {
+		ma.setActive(address, false)
+	}
+}
+
+func (ma *MetaAggregator) setActive(address pb.ServerAddress, isActive bool) {
+	ma.peerStatuesLock.Lock()
+	defer ma.peerStatuesLock.Unlock()
+	if isActive {
+		ma.peerStatues[address] = struct{}{}
+	} else {
+		delete(ma.peerStatues, address)
+	}
+}
+func (ma *MetaAggregator) isActive(address pb.ServerAddress)(isActive bool) {
+	ma.peerStatuesLock.Lock()
+	defer ma.peerStatuesLock.Unlock()
+	_, isActive = ma.peerStatues[address]
+	return
 }
 
 func (ma *MetaAggregator) subscribeToOneFiler(f *Filer, self pb.ServerAddress, peer pb.ServerAddress) {
@@ -149,6 +181,10 @@ func (ma *MetaAggregator) subscribeToOneFiler(f *Filer, self pb.ServerAddress, p
 
 			}
 		})
+		if !ma.isActive(peer) {
+			glog.V(0).Infof("stop subscribing remote %s meta change", peer)
+			return
+		}
 		if err != nil {
 			glog.V(0).Infof("subscribing remote %s meta change: %v", peer, err)
 			time.Sleep(1733 * time.Millisecond)
diff --git a/weed/pb/master.proto b/weed/pb/master.proto
index d3ebee11f..3383d1dd5 100644
--- a/weed/pb/master.proto
+++ b/weed/pb/master.proto
@@ -304,6 +304,7 @@ message ListClusterNodesResponse {
   message ClusterNode {
     string address = 1;
     string version = 2;
+    bool is_leader = 3;
   }
   repeated ClusterNode cluster_nodes = 1;
 }
diff --git a/weed/pb/master_pb/master.pb.go b/weed/pb/master_pb/master.pb.go
index 0ee60f403..ca8a50931 100644
--- a/weed/pb/master_pb/master.pb.go
+++ b/weed/pb/master_pb/master.pb.go
@@ -3063,8 +3063,9 @@ type ListClusterNodesResponse_ClusterNode struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Address string `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
-	Version string `protobuf:"bytes,2,opt,name=version,proto3" json:"version,omitempty"`
+	Address  string `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
+	Version  string `protobuf:"bytes,2,opt,name=version,proto3" json:"version,omitempty"`
+	IsLeader bool   `protobuf:"varint,3,opt,name=is_leader,json=isLeader,proto3" json:"is_leader,omitempty"`
 }
 
 func (x *ListClusterNodesResponse_ClusterNode) Reset() {
@@ -3113,6 +3114,13 @@ func (x *ListClusterNodesResponse_ClusterNode) GetVersion() string {
 	return ""
 }
 
+func (x *ListClusterNodesResponse_ClusterNode) GetIsLeader() bool {
+	if x != nil {
+		return x.IsLeader
+	}
+	return false
+}
+
 var File_master_proto protoreflect.FileDescriptor
 
 var file_master_proto_rawDesc = []byte{
@@ -3558,7 +3566,7 @@ var file_master_proto_rawDesc = []byte{
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@@ -3566,118 +3574,120 @@ var file_master_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/weed/server/filer_server.go b/weed/server/filer_server.go
index aa66b4187..a47fdb28c 100644
--- a/weed/server/filer_server.go
+++ b/weed/server/filer_server.go
@@ -108,7 +108,7 @@ func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption)
 	fs.checkWithMaster()
 
 	go stats.LoopPushingMetric("filer", string(fs.option.Host), fs.metricsAddress, fs.metricsIntervalSec)
-	go fs.filer.KeepConnectedToMaster()
+	go fs.filer.KeepMasterClientConnected()
 
 	v := util.GetViper()
 	if !util.LoadConfiguration("filer", false) {
@@ -143,7 +143,7 @@ func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption)
 		readonlyMux.HandleFunc("/", fs.readonlyFilerHandler)
 	}
 
-	fs.filer.AggregateFromPeers(option.Host, option.Filers)
+	fs.filer.AggregateFromPeers(option.Host)
 
 	fs.filer.LoadBuckets()
 
diff --git a/weed/server/master_grpc_server_cluster.go b/weed/server/master_grpc_server_cluster.go
index 8e80cade3..4a61d2e29 100644
--- a/weed/server/master_grpc_server_cluster.go
+++ b/weed/server/master_grpc_server_cluster.go
@@ -14,6 +14,7 @@ func (ms *MasterServer) ListClusterNodes(ctx context.Context, req *master_pb.Lis
 		resp.ClusterNodes = append(resp.ClusterNodes, &master_pb.ListClusterNodesResponse_ClusterNode{
 			Address: string(node.Address),
 			Version: node.Version,
+			IsLeader: ms.Cluster.IsOneLeader(node.Address),
 		})
 	}
 	return resp, nil
diff --git a/weed/wdclient/masterclient.go b/weed/wdclient/masterclient.go
index a2f6c7ffb..727d9cd34 100644
--- a/weed/wdclient/masterclient.go
+++ b/weed/wdclient/masterclient.go
@@ -21,6 +21,8 @@ type MasterClient struct {
 	grpcDialOption grpc.DialOption
 
 	vidMap
+
+	OnPeerUpdate func(update *master_pb.ClusterNodeUpdate)
 }
 
 func NewMasterClient(grpcDialOption grpc.DialOption, clientType string, clientHost pb.ServerAddress, clientDataCenter string, masters []pb.ServerAddress) *MasterClient {
@@ -151,10 +153,13 @@ func (mc *MasterClient) tryConnectToMaster(master pb.ServerAddress) (nextHintedL
 
 			if resp.ClusterNodeUpdate != nil {
 				update := resp.ClusterNodeUpdate
-				if update.IsAdd {
-					glog.V(0).Infof("+ %s %s leader:%v\n", update.NodeType, update.Address, update.IsLeader)
-				} else {
-					glog.V(0).Infof("- %s %s leader:%v\n", update.NodeType, update.Address, update.IsLeader)
+				if mc.OnPeerUpdate != nil {
+					if update.IsAdd {
+						glog.V(0).Infof("+ %s %s leader:%v\n", update.NodeType, update.Address, update.IsLeader)
+					} else {
+						glog.V(0).Infof("- %s %s leader:%v\n", update.NodeType, update.Address, update.IsLeader)
+					}
+					mc.OnPeerUpdate(update)
 				}
 			}