volume: load configuration from master at the start

fix https://github.com/chrislusf/seaweedfs/issues/1469

weed/server/volume_grpc_client_to_master.go

@@ -2,6 +2,7 @@ package weed_server
 
 import (
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/operation"
 	"time"
 
 	"google.golang.org/grpc"
@@ -21,6 +22,27 @@ import (
 func (vs *VolumeServer) GetMaster() string {
 	return vs.currentMaster
 }
+
+func (vs *VolumeServer) checkWithMaster() (err error) {
+	for _, master := range vs.SeedMasterNodes {
+		err = operation.WithMasterServerClient(master, vs.grpcDialOption, func(masterClient master_pb.SeaweedClient) error {
+			resp, err := masterClient.GetMasterConfiguration(context.Background(), &master_pb.GetMasterConfigurationRequest{})
+			if err != nil {
+				return fmt.Errorf("get master %s configuration: %v", master, err)
+			}
+			vs.MetricsAddress, vs.MetricsIntervalSec = resp.MetricsAddress, int(resp.MetricsIntervalSeconds)
+			backend.LoadFromPbStorageBackends(resp.StorageBackends)
+			return nil
+		})
+		if err == nil {
+			return
+		} else {
+			glog.V(0).Infof("checkWithMaster %s: %v", master, err)
+		}
+	}
+	return
+}
+
 func (vs *VolumeServer) heartbeat() {
 
 	glog.V(0).Infof("Volume server start with seed master nodes: %v", vs.SeedMasterNodes)

weed/server/volume_server.go

@@ -72,6 +72,9 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 		stopChan:                make(chan bool),
 	}
 	vs.SeedMasterNodes = masterNodes
+
+	vs.checkWithMaster()
+
 	vs.store = storage.NewStore(vs.grpcDialOption, port, ip, publicUrl, folders, maxCounts, minFreeSpacePercents, vs.needleMapKind)
 	vs.guard = security.NewGuard(whiteList, signingKey, expiresAfterSec, readSigningKey, readExpiresAfterSec)