欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  数据库

ubuntu mysql 5.6 安装与双机热备 有关问题及解决方案汇总2

程序员文章站 2022-06-17 12:40:56
...

ubuntu mysql 5.6 安装与双机热备 问题及解决方法汇总2 主机配备salve: 主机上 Mysql 执行: grant replication slave on *.* to slave@'172.36.8.%' identified by 'passwd'; 修改主从配置: 1)主机操作 #mysql -uroot -passwd mysqlcreate database yccs_

ubuntu mysql 5.6 安装与双机热备 问题及解决方法汇总2
主机配备salve:
主机上 Mysql 执行:
grant replication slave on *.* to slave@'172.36.8.%' identified by 'passwd';




修改主从配置:


1)主机操作
#mysql -uroot -passwd
mysql>create database yccs_admin;
mysql>grant replication slave on *.* to 'root'@'192.168.0.124' identified by 'passwd';
编辑my.cny
在【mysqld】中去除下面注释:
servier-id = 1
log_bin = /var/log/mysql/mysql-bin.log
binlog-do-db= your_dbname //如果有多个数据库需要同步,重复此参数,每个数据库一行
binlog-ignore-db=mysql //不同步的数据库
重新启动mysql
service mysql restart
通过命令查看:
show master status ; //通过该命令获取file和position,这个在配置slave的时候有用
2)从机配置
编辑【mysqld】
server-id = 2
replicate-do-db=your_dbname
replicate-ignore-db=mysql
slave-skip-errors= 1062 //加上这条
从新启动mysql服务
service mysql restart
登录并创建数据库:
mysql -uroot -ppasswd
create database yccs_admin;
3)在主从服务器上执行
主: mysql> flush master; flush logs;
从:mysql> flush slave; flush logs;
4)在从服务器上执行如下命令
mysql>stop slave;
mysql>change master to master_host='192.168.0.123',master_user=’root',master_password='passwd',master_port=3306,
master_log_file='mysql-bin.000001',master_log_pos=107;
mysql>start slave;
mysql>show slave status\G
如果slave_IO_running:yes slave_sql_running:yes,那说明没有问题了,就可以再主机上面建库建表写测试数据了,然后
在从机器上查看有没有数据同步过来。

期间会遇到一些问题:

从机上执行:

show slave status\G;

Last_IO_Errno: 1236
Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'binlog truncated in the middle of event; consider out of disk space on master; the first event 'mysql-bin.000001' at 107, the last event read from '/var/log/mysql/mysql-bin.000001' at 107, the last byte read from '/var/log/mysql/mysql-bin.000001' at 126.'
Last_SQL_Errno: 0
Last_SQL_Error:

ERROR:

mysql主从库不同步解决方法
遇到这样的错误如:“Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Could not find first log file name in binary log index file'”等或由于清数据导致主从库不同步了,解决办法如下:
先进入slave中执行:"slave stop;"来停止从库同步;
再去master中执行:"flush logs;"来清空日志;
然后在master中执行:"show master status;"查看下主库的状态,主要是日志的文件和position;
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000006 | 120 | DATABASSE | mysql | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

然后回到slave中,执行:"CHANGE MASTER TO MASTER_LOG_FILE='log-bin.000004',MASTER_LOG_POS=106;",文件和位置对应master中的;
最后在slave中执行:"slave start;"来启动同步。
当你幸福的时候,我不在,当我幸福的时候,你也不在

change master to master_host='172.16.8.66',master_user='root',master_password='PASSWD',master_port=3306,master_log_file='mysql-bin.000006',master_log_pos=120;


mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.。。
Master_User: root
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 120
Relay_Log_File: ubuntu-relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000006
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: DATABASE
Replicate_Ignore_DB: mysql
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: 120
Relay_Log_Space: 457
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: 1
Master_UUID: 8750084d-3197-11e3-863d-0050569b1e91
Master_Info_File: /opt/mysql/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
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
1 row in set (0.00 sec)

ERROR:
No query specified

主从同步问题已经解决;