From 03aec9ce7ea94c11d92f53e419685b7127347eb1 Mon Sep 17 00:00:00 2001
From: Konstantin Lebedev <9497591+kmlebedev@users.noreply.github.com>
Date: Sat, 30 Apr 2022 13:56:35 +0500
Subject: [PATCH] avoid panic if hashicorp raft not initialized

---
 weed/server/master_grpc_server_raft.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/weed/server/master_grpc_server_raft.go b/weed/server/master_grpc_server_raft.go
index 37491b3df..258b6beac 100644
--- a/weed/server/master_grpc_server_raft.go
+++ b/weed/server/master_grpc_server_raft.go
@@ -11,6 +11,10 @@ import (
 func (ms *MasterServer) RaftListClusterServers(ctx context.Context, req *master_pb.RaftListClusterServersRequest) (*master_pb.RaftListClusterServersResponse, error) {
 	resp := &master_pb.RaftListClusterServersResponse{}
 
+	if ms.Topo.HashicorpRaft == nil {
+		return resp, nil
+	}
+
 	servers := ms.Topo.HashicorpRaft.GetConfiguration().Configuration().Servers
 
 	for _, server := range servers {
@@ -25,6 +29,11 @@ func (ms *MasterServer) RaftListClusterServers(ctx context.Context, req *master_
 
 func (ms *MasterServer) RaftAddServer(ctx context.Context, req *master_pb.RaftAddServerRequest) (*master_pb.RaftAddServerResponse, error) {
 	resp := &master_pb.RaftAddServerResponse{}
+
+	if ms.Topo.HashicorpRaft == nil {
+		return resp, nil
+	}
+
 	if ms.Topo.HashicorpRaft.State() != raft.Leader {
 		return nil, fmt.Errorf("raft add server %s failed: %s is no current leader", req.Id, ms.Topo.HashicorpRaft.String())
 	}
@@ -45,6 +54,10 @@ func (ms *MasterServer) RaftAddServer(ctx context.Context, req *master_pb.RaftAd
 func (ms *MasterServer) RaftRemoveServer(ctx context.Context, req *master_pb.RaftRemoveServerRequest) (*master_pb.RaftRemoveServerResponse, error) {
 	resp := &master_pb.RaftRemoveServerResponse{}
 
+	if ms.Topo.HashicorpRaft == nil {
+		return resp, nil
+	}
+
 	if ms.Topo.HashicorpRaft.State() != raft.Leader {
 		return nil, fmt.Errorf("raft remove server %s failed: %s is no current leader", req.Id, ms.Topo.HashicorpRaft.String())
 	}