master: remove hard coded filer settings in master.toml

fix https://github.com/chrislusf/seaweedfs/issues/2529

weed/command/scaffold/master.toml

@@ -19,9 +19,6 @@ scripts = """
 """
 sleep_minutes = 17          # sleep minutes between each script execution
 
-[master.filer]
-default = "localhost:8888"    # used by maintenance scripts if the scripts needs to use fs related commands
-
 
 [master.sequencer]
 type = "raft"     # Choose [raft|snowflake] type for storing the file id sequence

weed/server/master_grpc_server_cluster.go

@@ -2,7 +2,10 @@ package weed_server
 
 import (
 	"context"
+	"github.com/chrislusf/seaweedfs/weed/cluster"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"math/rand"
 )
 
 func (ms *MasterServer) ListClusterNodes(ctx context.Context, req *master_pb.ListClusterNodesRequest) (*master_pb.ListClusterNodesResponse, error) {
@@ -12,10 +15,26 @@ 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,
 			IsLeader: ms.Cluster.IsOneLeader(node.Address),
 		})
 	}
 	return resp, nil
 }
+
+func (ms *MasterServer) GetOneFiler() pb.ServerAddress {
+
+	clusterNodes := ms.Cluster.ListClusterNode(cluster.FilerType)
+
+	var filers []pb.ServerAddress
+	for _, node := range clusterNodes {
+		if ms.Cluster.IsOneLeader(node.Address) {
+			filers = append(filers, node.Address)
+		}
+	}
+	if len(filers) > 0 {
+		return filers[rand.Intn(len(filers))]
+	}
+	return "localhost:8888"
+}

weed/server/master_server.go

@@ -208,7 +208,6 @@ func (ms *MasterServer) proxyToLeader(f http.HandlerFunc) http.HandlerFunc {
 }
 
 func (ms *MasterServer) startAdminScripts() {
-	var err error
 
 	v := util.GetViper()
 	adminScripts := v.GetString("master.maintenance.scripts")
@@ -220,9 +219,6 @@ func (ms *MasterServer) startAdminScripts() {
 	v.SetDefault("master.maintenance.sleep_minutes", 17)
 	sleepMinutes := v.GetInt("master.maintenance.sleep_minutes")
 
-	v.SetDefault("master.filer.default", "localhost:8888")
-	filerHostPort := v.GetString("master.filer.default")
-
 	scriptLines := strings.Split(adminScripts, "\n")
 	if !strings.Contains(adminScripts, "lock") {
 		scriptLines = append(append([]string{}, "lock"), scriptLines...)
@@ -235,14 +231,9 @@ func (ms *MasterServer) startAdminScripts() {
 	shellOptions.GrpcDialOption = security.LoadClientTLS(v, "grpc.master")
 	shellOptions.Masters = &masterAddress
 
-	shellOptions.FilerAddress = pb.ServerAddress(filerHostPort)
 	shellOptions.Directory = "/"
-	if err != nil {
-		glog.V(0).Infof("failed to parse master.filer.default = %s : %v\n", filerHostPort, err)
-		return
-	}
 
-	commandEnv := shell.NewCommandEnv(shellOptions)
+	commandEnv := shell.NewCommandEnv(&shellOptions)
 
 	reg, _ := regexp.Compile(`'.*?'|".*?"|\S+`)
 
@@ -254,6 +245,10 @@ func (ms *MasterServer) startAdminScripts() {
 		for {
 			time.Sleep(time.Duration(sleepMinutes) * time.Minute)
 			if ms.Topo.IsLeader() {
+				shellOptions.FilerAddress = ms.GetOneFiler()
+				if shellOptions.FilerAddress == "" {
+					continue
+				}
 				for _, line := range scriptLines {
 					for _, c := range strings.Split(line, ";") {
 						processEachCmd(reg, c, commandEnv)

weed/shell/commands.go

@@ -29,7 +29,7 @@ type ShellOptions struct {
 type CommandEnv struct {
 	env          map[string]string
 	MasterClient *wdclient.MasterClient
-	option       ShellOptions
+	option       *ShellOptions
 	locker       *exclusive_locks.ExclusiveLocker
 }
 
@@ -43,7 +43,7 @@ var (
 	Commands = []command{}
 )
 
-func NewCommandEnv(options ShellOptions) *CommandEnv {
+func NewCommandEnv(options *ShellOptions) *CommandEnv {
 	ce := &CommandEnv{
 		env:          make(map[string]string),
 		MasterClient: wdclient.NewMasterClient(options.GrpcDialOption, pb.AdminShellClient, "", "", pb.ServerAddresses(*options.Masters).ToAddresses()),