mysql主從同步從庫上Slave_IO_Running: Connecting問題

一．在做主從同步時遇到的問題

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數據庫主從問題從庫上Slave_IO_Running:?Connecting??

在做mysql主從同步的時候有時候發現在從庫上Slave_IO_Running:?Connecting

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二．解決辦法通常是5個問題：

1.網絡不通??????#互ping機器ip，無丟包率正常訪問，排除

2.密碼不對??????#MySQL重新授權遠程用戶登陸賬號，重新設置密碼，排除

3.pos不正確?????#主服務器,登陸數據庫重新查看起始偏移量show master status,排除

4.ID問題????????

#ID的問題，在安裝完mysql數據庫的時候默認他們的server-id=1?但是在做主從同步的時候需要將ID號碼設置不一樣才行,查看數據庫配置文件cat ?/etc/my.cnf，文件寫的不同，排除

5.防火墻策略??

查看防火墻策略，是否放通雙方的服務端口?iptables -nL,最后發現 防火墻策略寫了多端口防火墻策略的端口不生效，解決防火墻策略單獨開放端口，暫停從服務的io讀取stop slave;重新在從的數據庫寫入以下語句：

mysql> change master to

????-> master_host='192.168.137.36', ????????????

????-> master_user='root', ????????????????

????-> master_password='abc123',

????-> master_port=3307,

????-> master_log_file='mysql-bin.000001',

????-> master_log_pos=848;

Query OK, 0 rows affected, 2 warnings (0.05 sec)

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mysql> start slave;

Query OK, 0 rows affected (0.02 sec)

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mysql> show slave status\G

*************************** 1. row ***************************

???????????????Slave_IO_State: Waiting for master to send event

??????????????????Master_Host: 192.168.137.36

??????????????????Master_User: root

??????????????????Master_Port: 3307

????????????????Connect_Retry: 60

??????????????Master_Log_File: mysql-bin.000001

??????????Read_Master_Log_Pos: 1298

???????????????Relay_Log_File: localhost-relay-bin.000002

????????????????Relay_Log_Pos: 770

????????Relay_Master_Log_File: mysql-bin.000001

?????????????Slave_IO_Running: Yes

????????????Slave_SQL_Running: Yes

??????????????Replicate_Do_DB:

??????????Replicate_Ignore_DB:

???????????Replicate_Do_Table:

???????Replicate_Ignore_Table:

??????Replicate_Wild_Do_Table:

??Replicate_Wild_Ignore_Table:

???????????????????Last_Errno: 0

???????????????????Last_Error:

?????????????????Skip_Counter: 0

??????????Exec_Master_Log_Pos: 1298

??????????????Relay_Log_Space: 981

??????????????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

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: 9

??????????????????Master_UUID: ad899234-9c81-11e7-99bd-000c29af2bef

?????????????Master_Info_File: /data/mysql_data1/master.info

????????????????????SQL_Delay: 0

??????????SQL_Remaining_Delay: NULL

??????Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

???????????Master_Retry_Count: 86400

??????????????????Master_Bind:

??????Last_IO_Error_Timestamp:

?????Last_SQL_Error_Timestamp:

???????????????Master_SSL_Crl:

???????????Master_SSL_Crlpath:

???????????Retrieved_Gtid_Set:

????????????Executed_Gtid_Set:

????????????????Auto_Position: 0

?????????Replicate_Rewrite_DB:

?????????????????Channel_Name:

???????????Master_TLS_Version:

1 row in set (0.00 sec)

注意：標注的倆個紅色yes為正常。

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本文原作者去輕狂書生，原文鏈接http://blog.51cto.com/8999a/1966548

標簽：?IO?Running?Slave

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