minirds实例(apisvr)第二通道io中断告警
minirds实例(dbaas_db)第二通道IO中断告警
这种问题隔上几天就会出现
首先平台告警ip 端口显示同步异常io断开 ssh登入ip my端口进入库
执行
mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.10.118.25 Master_User: mysync Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000023 Read_Master_Log_Pos: 39913 Relay_Log_File: mysql-relay-bin.000031 Relay_Log_Pos: 40059 Relay_Master_Log_File: mysql-bin.000023 Slave_IO_Running: Yes #Yes表示io_thread的和主库连接正常并能实施复制工作,No则说明与主库通讯异常,多数情况是由主从间网络引起的问题; Slave_SQL_Running: Yes #具体就是语句是否执行通过,常会遇到主键重复或是某个表不存在。 Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: mysql.%,test.%,information_schema.% Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 39913 Relay_Log_Space: 40361 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 #判断主动同步延时的参考值,是通过比较sql_thread执行的event的timestamp和io_thread复制好的event的timestamp(简写为ts)进行比较,而得到的这么一个差值; Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 18 1 row in set (0.00 sec) ERROR: No query specified mysql>
实施步骤:
停备库通道执行:stop slave for Channel 'xxxx';
重置备库通道执行reset slave for Channel 'xxxx';
启动备库执行 start slave;
验证备库连接已经恢复执行show slave status \G;