Centos 6.5 下搭建Mysql 5.6双主模式

环境：centos 6.5 mysql 5.6

service DB1: 192.168.235.134
service DB2: 192.168.235.149

1.设置同步账号密码及权限
Service DB1

mysql> grant all privileges on *.* to sync@192.168.235.149 identified by '123' with grant option;
Query OK, 0 rows affected (0.02 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.02 sec)

Service DB2

mysql> grant all privileges on *.* to sync@192.168.235.134 identified by '123' with grant option;
Query OK, 0 rows affected (0.02 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.02 sec)

测试：

Service DB1:mysql -h 192.168.235.149 -usync -p123
Service DB2:mysql -h 192.168.235.134 -usync -p123

2.修改mysql的配置文件：
以root用户登录ServDB1，修改ServDB1的my.cnf文件
vi /etc/my.cnf
在[mysqld]的配置项中增加如下配置：
[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
socket = /tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mydata
skip-external-locking
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
thread_concurrency = 2
log-bin=mysql-bin
relay-log=mysql-relay-log
binlog_format=mixed
server-id = 1
auto-increment-increment=10
auto-increment-offset=1
以root用户登录ServDB2，修改ServDB2的my.cnf文件
[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
socket = /tmp/mysql.sock
basedir=/usr/local/mysql
datadir=/data/mydata
skip-external-locking
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
thread_concurrency = 2
log-bin=mysql-bin
binlog_format=mixed
server-id = 2
auto-increment-increment=10
auto-increment-offset=2
[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M
~
分别启动数据库

[root@bogon data]# service mysqld start
Starting MySQL.......

[ OK ]

3.分别查看binlog日志位置：
Server DB1 上：

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 |      120 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
Server DB2 上：
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000008 |      120 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

4.两台数据库设置连接

Server DB1:

CHANGE MASTER TO
MASTER_HOST='192.168.235.149',MASTER_USER='sync',MASTER_PASSWORD='123',MASTER_LOG_FILE='mysql-bin.000004',MASTER_LOG_POS=120;

mysql> start slave; 启动从服务器
mysql> SHOW SLAVE STATUS\G;
查看这两项是否为YES，yes为正常。
Slave_IO_Running:Yes
Slave_SQL_Running:Yes
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.235.149
Master_User: sync
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 219
Relay_Log_File: mysql-relay-log.000002
Relay_Log_Pos: 382
Relay_Master_Log_File: mysql-bin.000008
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: 219
Relay_Log_Space: 555
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: 2
Master_UUID: 44d1d14b-884e-11e5-865a-000c29c70f2e
Master_Info_File: /data/mydata/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

Server DB2:
CHANGE MASTER TO
MASTER_HOST='192.168.235.134',MASTER_USER='sync',MASTER_PASSWORD='123',MASTER_LOG_FILE='mysql-bin.000008',MASTER_LOG_POS=120;
mysql> start slave; 启动从服务器
mysql> SHOW SLAVE STATUS\G; 查看状态
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.235.134
Master_User: sync
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 120
Relay_Log_File: test2-relay-bin.000002
Relay_Log_Pos: 283
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: 120
Relay_Log_Space: 456
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: 15c66da4-a39b-11e5-b85e-000c297221e8
Master_Info_File: /data/mydata/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)

4.验证双主：
在Server DB1上创建数据库
mysql> create database mjie;
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mjie |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)

登录Server DB2 查看是否同步
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mjie |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)

OK 两台数据库数据一致。成功！！！！！

说明：
server-id必须唯一
binlog-do-db和replicate-do-db表示需要同步的数据库
binlog-ignore-db和replicate-ignore-db表示不需要同步的数据库

本文出自 “Mr-G运维知识库” 博客，请务必保留此出处http://xpstack.blog.51cto.com/2973026/1731269