MySQL主从复制
MySQL主从复制
一、准备
1、同步时间
Ntpdate 时间服务器ip
2、主从节点可以互相解析
# vim /etc/hosts
172.16.5.11 www.a.com a
172.16.5.12 www.b.com b
3、建立双机互信
# ssh-keygen -t rsa -P ‘’
# ssh-copy-id root@172.16.5.11
二、修改配置文件,在两个节点上mysql初始化完之后修改。
1、主服务器配置文件修改
Server-id = 10
Binlog_format=mixed
sync-binlog = ON 安装完了之后配置,不要再初始化数据文件的时候启用
2、从服务器配置文件修改
Server -id = 20
Read-only=1
Relay-log = /mydata/data/relay-bin
Relay-log-index = /mydata/data/relay-bin.index 中继日志索引,这个可以不启用,中继日志启动之后,自动开启,开启是为了自定义它的目录
skip-slave-start=1
# log-bin = /mysql-bin 关闭二进制日志
三、实现主从复制
1、在主服务器上创建一个只有复制权限的用户
mysql> grant replication slave,replication client on *.* to 'test'@'%' identified by 'pass';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 341 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.01 sec)
2、从服务器上启动主从复制功能
mysql> change master to master_host='172.16.5.11', master_user='user',
master_password='pass',master_log_file='mysql-bin.000003',master_log_pos=341;
这里最好指定位置,否则可能会报错,不如直接指定,来的省事。
mysql> start slave;
也可以单独启动线程,但start slave 默认会将连个线程同时启动
mysql> start io_thread;
mysql> start sql_thread;
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.5.11
Master_User: user
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 341
Relay_Log_File: relay-bin.000004
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000004
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: 188
Relay_Log_Space: 403
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
1 row in set (0.00 sec)
3、在中服务器上创建数据库,看从服务器能否同步。
主服务器
mysql> create database db0;
Query OK, 1 row affected (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| DB1 |
| db0 |
| mysql |
| performance_schema |
| test |
+--------------------+
6 rows in set (0.00 sec)
从服务器
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| DB1 |
| db0 |
| mysql |
| performance_schema |
| test |
+--------------------+
6 rows in set (0.01 sec)
发现已经同步过来了。
推荐阅读:
Ubuntu下Nginx做负载实现高性能WEB服务器5---MySQL主主同步
生产环境MySQL主主同步主键冲突处理
MySQL主从失败 错误Got fatal error 1236
MySQL主从复制,单台服务器上实施
继续阅读本文的精彩内容请看第2页:
|
评论暂时关闭