Merge pull request #42 from TyphoonTai/master

feat: enable weakly consistent read for users on obproxy V4

src/obproxy/obutils/ob_config_processor.cpp

@@ -768,6 +768,22 @@ int ObConfigProcessor::get_proxy_config_int_item(const ObVipAddr &addr, const Ob
   return ret;
 }
 
+int ObConfigProcessor::get_proxy_config_strlist_item(const ObVipAddr &addr, const ObString &cluster_name,
+                                                  const ObString &tenant_name, const ObString& name,
+                                                  ObConfigStrListItem &ret_item)
+{
+  int ret = OB_SUCCESS;
+  ObConfigItem item;
+  if (OB_FAIL(get_proxy_config(addr, cluster_name, tenant_name, name, item))) {
+    LOG_WARN("get proxy config failed", K(addr), K(cluster_name), K(tenant_name), K(name), K(ret));
+  } else {
+    ret_item = item.str();
+    LOG_DEBUG("get list item succ", K(ret_item));
+  }
+
+  return ret;
+}
+
 } // end of obutils
 } // end of obproxy
 } // end of oceanbase

src/obproxy/obutils/ob_config_processor.h

@@ -116,6 +116,9 @@ public:
   int get_proxy_config_int_item(const ObVipAddr &addr, const common::ObString &cluster_name,
                                  const common::ObString &tenant_name, const common::ObString& name,
                                  common::ObConfigIntItem &ret_item);
+  int get_proxy_config_strlist_item(const ObVipAddr &addr, const common::ObString &cluster_name,
+                                 const common::ObString &tenant_name, const common::ObString& name,
+                                 common::ObConfigStrListItem &ret_item);
   int get_proxy_config_with_level(const ObVipAddr &addr, const common::ObString &cluster_name,
                                   const common::ObString &tenant_name, const common::ObString& name,
                                   common::ObConfigItem &ret_item, const ObString level, bool &found);

src/obproxy/obutils/ob_proxy_config.h

@@ -486,6 +486,8 @@ public:
   DEF_BOOL(enable_read_write_split, "false", "if enabled, use read write split mode", CFG_NO_NEED_REBOOT, CFG_SECTION_OBPROXY, CFG_VISIBLE_LEVEL_SYS);
   DEF_BOOL(enable_transaction_split, "false", "if enabled, support transaction split", CFG_NO_NEED_REBOOT, CFG_SECTION_OBPROXY, CFG_VISIBLE_LEVEL_SYS);
 
+  DEF_STR_LIST(weak_read_user_list, "", "weak read for list of users, format user1;user2", CFG_NO_NEED_REBOOT, CFG_SECTION_OBPROXY, CFG_VISIBLE_LEVEL_USER);
+
   // binlog service
   DEF_STR(binlog_service_ip, "", "binlog service ip, format ip1:sql_port1", CFG_NO_NEED_REBOOT, CFG_SECTION_OBPROXY, CFG_VISIBLE_LEVEL_SYS);
   DEF_BOOL(enable_binlog_service, "false", "if enabled, obproxy will send binlog request to OBLogProxy",  CFG_NO_NEED_REBOOT, CFG_SECTION_OBPROXY, CFG_VISIBLE_LEVEL_SYS);

src/obproxy/proxy/mysql/ob_mysql_transact.cpp

@@ -6131,12 +6131,42 @@ int ObMysqlTransact::ObTransState::get_config_item(const ObString& cluster_name,
   }
 
   if (OB_SUCC(ret)) {
+    ObConfigStrListItem strlist_item;
+    if (OB_FAIL(get_global_config_processor().get_proxy_config_strlist_item(
+         addr, cluster_name, tenant_name, "weak_read_user_list", strlist_item))) {
+      LOG_WARN("get vip weak_read_user_list failed", K(addr), K(cluster_name), K(tenant_name), K(ret));
+    } else {
+      bool is_weak_read_user = false;
+      int64_t total_size = strlist_item.size();
+      if (OB_UNLIKELY(total_size > 0)) {
+        ObMysqlAuthRequest &auth_req = session_info.get_login_req();
+        ObHSRResult &hsr = auth_req.get_hsr_result();
+        char user_buf[MAX_VALUE_LENGTH];
+        for (int64_t i = 0; OB_SUCC(ret) && i < total_size; ++i) {
+          user_buf[0] = '\0';
+          if (OB_FAIL(strlist_item.get(i, user_buf, static_cast<int64_t>(sizeof(user_buf))))) {
+            LOG_WARN("get weak read user list variables failed", K(ret));
+          } else{
+            if (hsr.response_.get_username().prefix_match(user_buf)){
+              is_weak_read_user = true;
+              break;
+            }
+          }
+        }
+      }
+      bool is_request_follower = false;
+      if (is_weak_read_user){
+        is_request_follower = true;
+      } else{
         ObConfigIntItem int_item;
         if (OB_FAIL(get_global_config_processor().get_proxy_config_int_item(
          addr, cluster_name, tenant_name, "obproxy_read_consistency", int_item))) {
            LOG_WARN("get vip obproxy_read_consistency failed", K(addr), K(cluster_name), K(tenant_name), K(ret));
-    } else {
-      bool is_request_follower = (RequestFollower == int_item.get_value());
+        } else{
+          is_request_follower = (RequestFollower == int_item.get_value());
+        }
+      }
+      if (OB_SUCC(ret)) {
         bool is_sys_var_update = (session_info.is_request_follower_user() != is_request_follower);
         session_info.set_is_request_follower_user(is_request_follower);
         if (is_sys_var_update) {
@@ -6155,6 +6185,7 @@ int ObMysqlTransact::ObTransState::get_config_item(const ObString& cluster_name,
         }
       }
     }
+  }
 
   if (OB_SUCC(ret)) {
     ObConfigBoolItem bool_item;