freeradius串連mysql資料庫慢

標籤：

【環境說明】

 伺服器版本         redHat5.3

 mysql版本         MySQL5.6.22

 freeradius版本   2.1.12

【問題描述】

  配置好freeradius的sql.conf中的資料庫地址，以及登入使用者名稱和密碼後，使用“radiusd -X”偵錯模式啟動radius，控制台一直在漫長的輸出嘗試串連mysql的日 志，如下所示：

2014-12-30 09:27:39 DEBUG sql.c 93 - [RLM_SQL] Starting 0
2014-12-30 09:27:39 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #0
2014-12-30 09:27:39 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #0
2014-12-30 09:27:56 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #0
2014-12-30 09:27:56 DEBUG sql.c 93 - [RLM_SQL] Starting 1
2014-12-30 09:27:56 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #1
2014-12-30 09:27:56 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #1
2014-12-30 09:28:12 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #1
2014-12-30 09:28:12 DEBUG sql.c 93 - [RLM_SQL] Starting 2
2014-12-30 09:28:12 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #2
2014-12-30 09:28:12 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #2
2014-12-30 09:28:28 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #2
2014-12-30 09:28:28 DEBUG sql.c 93 - [RLM_SQL] Starting 3
2014-12-30 09:28:28 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #3
2014-12-30 09:28:28 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #3
2014-12-30 09:28:44 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #3
2014-12-30 09:28:44 DEBUG sql.c 93 - [RLM_SQL] Starting 4
2014-12-30 09:28:44 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #4
2014-12-30 09:28:44 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #4
2014-12-30 09:29:00 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #4
2014-12-30 09:29:00 DEBUG sql.c 93 - [RLM_SQL] Starting 5
2014-12-30 09:29:00 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #5
2014-12-30 09:29:00 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #5
2014-12-30 09:29:17 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #5
2014-12-30 09:29:17 DEBUG sql.c 93 - [RLM_SQL] Starting 6
2014-12-30 09:29:17 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #6
2014-12-30 09:29:17 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #6
2014-12-30 09:29:32 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #6
2014-12-30 09:29:32 DEBUG sql.c 93 - [RLM_SQL] Starting 7
2014-12-30 09:29:32 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #7
2014-12-30 09:29:32 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #7
2014-12-30 09:29:48 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #7
2014-12-30 09:29:48 DEBUG sql.c 93 - [RLM_SQL] Starting 8
2014-12-30 09:29:48 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #8
2014-12-30 09:29:48 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #8
2014-12-30 09:30:04 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #8
2014-12-30 09:30:04 DEBUG sql.c 93 - [RLM_SQL] Starting 9
2014-12-30 09:30:04 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #9
2014-12-30 09:30:04 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #9
2014-12-30 09:30:21 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #9
2014-12-30 09:30:21 DEBUG sql.c 93 - [RLM_SQL] Starting 10
2014-12-30 09:30:21 INFO sql.c 54 - [RLM_SQL] Attempting to connect rlm_sql_mysql #10
2014-12-30 09:30:21 INFO sql_mysql.c 79 - [RLM_SQL_MYSQL] Starting connect to MySQL server for #10
2014-12-30 09:30:37 INFO sql.c 58 - [RLM_SQL] Connected new DB handle, #10

到99以後提示失敗，經查閱相關資料，進行如下處理即解決問題

【解決辦法】

 原理：關閉mysql伺服器串連的網域名稱解析

 步驟：

        1 vim /usr/my.cnf; mysql5.6.22版的設定檔在/usr/下，編輯my.cnf，在[mysqld]下增加一行“skip-name-resovle”,儲存退出；

        2 重啟mysql；

        3 重新啟動radius；

 【可能存在問題】

        mysql用戶端串連伺服器時，伺服器會對用戶端進行反向網域名稱解析，因此這個是耗時多的原因，取消網域名稱解析以後，mysql的許可權表（user表）中將不能再使用類似localhost之類的主機名稱，而必須使用ip地址。

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freeradius串連mysql資料庫慢