fix single node start

Author: lzxddz

storage/eloq/ha_eloq.cc

@@ -2660,7 +2660,8 @@ static int eloq_init_func(void *p)
 
 #elif ELOQDS
   case KV_ELOQDS: {
-    bool is_single_node= true;
+    bool is_single_node=
+        (ng_configs.size() == 1 && ng_configs.begin()->second.size() == 1);
     std::string ds_peer_node= eloq_dss_peer_node;
     std::string ds_branch_name= eloq_dss_branch_name;
     std::string dss_data_path= mysql_real_data_home_ptr;
@@ -2741,18 +2742,43 @@ static int eloq_init_func(void *p)
     }
     else
     {
-      // Bind dss with TxService.
+      // Bind dss leaders with TxService ng leaders.
       std::unordered_map<uint32_t, uint32_t> ng_leaders;
+
       if (opt_bootstrap || is_single_node)
       {
+        // Must parse all node groups to generate data store shards configs.
+        std::unordered_map<uint32_t, std::vector<NodeConfig>> tmp_ng_configs;
+        if (!txservice::ReadClusterConfigFile(
+                cluster_config_file, tmp_ng_configs, cluster_config_version))
+        {
+
+          // Read cluster topology from general config file in this case
+          auto parse_res= txservice::ParseNgConfig(
+              eloq_ip_list, eloq_standby_ip_list, eloq_voter_ip_list,
+              tmp_ng_configs, eloq_node_group_replica_num, 0);
+          if (!parse_res)
+          {
+            LOG(ERROR)
+                << "Failed to extract cluster configs from ip_port_list.";
+            DBUG_RETURN(eloq_init_abort());
+          }
+        }
+
         // For bootstrap, start all data store shards in current node.
-        for (auto &ng : ng_configs)
+        for (auto &ng : tmp_ng_configs)
         {
           ng_leaders.emplace(ng.first, node_id);
         }
+
+        EloqDS::DataStoreServiceClient::TxConfigsToDssClusterConfig(
+            node_id, tmp_ng_configs, ng_leaders, ds_config);
+      }
+      else
+      {
+        EloqDS::DataStoreServiceClient::TxConfigsToDssClusterConfig(
+            node_id, ng_configs, ng_leaders, ds_config);
       }
-      EloqDS::DataStoreServiceClient::TxConfigsToDssClusterConfig(
-          node_id, ng_configs, ng_leaders, ds_config);
     }
 
     data_store_service_= std::make_unique<EloqDS::DataStoreService>(