MySQL主主模式

mysql主主复制配置：

HOSTNAME IPADDR PORT
节点1:my-prod01.oracle.com 192.168.10.97 3306
节点2:my-prod02.oracle.com 192.168.10.5 3306

1、修改my.cnf文件
节点1:
[mysqld]
server_id = 1
datadir = /data/mysql_3306/data
port = 3306
socket = /data/mysql_3306/run/mysql.sock
log-error=/data/mysql_3306/logs/mysqlerror.log
log-bin = /data/mysql_3306/logs/binlog
relay-log = /data/mysql_3306/logs/relaylog
binlog_format = row
skip-name-resolve
sync_binlog = 1
log_slave_updates = 1
read_only = 0

auto-increment-increment = 2

auto-increment-offset = 1

节点2:
[mysqld]
server_id = 2
datadir = /data/mysql_3306/data
port = 3306
socket = /data/mysql_3306/run/mysql.sock
log-error=/data/mysql_3306/logs/mysqlerror.log
log-bin = /data/mysql_3306/logs/binlog
relay-log = /data/mysql_3306/logs/relaylog
binlog_format = row
skip-name-resolve
sync_binlog = 1
log_slave_updates = 1
read_only = 0

auto-increment-increment = 2
auto-increment-offset = 2

#双主复制模式
auto_increment_offset表示自增长字段从哪个数开始,取值范围是1 .. 65535
auto_increment_increment表示自增长字段每次递增的量,其默认值是1,取值范围是1 .. 65535
在主主同步配置时,需要将两台服务器的auto_increment_increment增长量都配置为2,而要把auto_increment_offset分别配置为1和2.
这样避免两台服务器同时做更新时自增长字段的值之间发生冲突

mkdir -p /data/mysql_3306/data/logs/binlog
mkdir -p /data/mysql_3306/data/logs/relaylog

创建复制权限用户：
节点1:
mysql> GRANT replication slave ON *.* TO 'replicator'@'192.168.10.5' identified by 'replicator';
mysql> flush privileges;
mysql> show master status \G
*************************** 1. row ***************************
             File: binlog.000001
         Position: 120
     Binlog_Do_DB: 
 Binlog_Ignore_DB: 
Executed_Gtid_Set: 
1 row in set (0.00 sec)
mysql> unlock tables;
Query OK, 0 rows affected (0.03 sec)

节点2:
mysql> GRANT replication slave ON *.* TO 'replicator'@'192.168.10.97' identified by 'replicator';
mysql> flush privileges;
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)

mysql> show master status \G
*************************** 1. row ***************************
             File: binlog.000001
         Position: 120
     Binlog_Do_DB: 
 Binlog_Ignore_DB: 
Executed_Gtid_Set: 
1 row in set (0.00 sec)
mysql> unlock tables;
Query OK, 0 rows affected (0.03 sec)

互为master:
节点1:
change master to master_host='192.168.10.5', master_port=3306, master_user='replicator',master_password='replicator', master_log_file='binlog.000001',master_log_pos=120;

mysql> start slave;
Query OK, 0 rows affected (0.02 sec)
mysql> show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.10.5
                  Master_User: replicator
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: binlog.000001
          Read_Master_Log_Pos: 120
               Relay_Log_File: binlog.000002
                Relay_Log_Pos: 280
        Relay_Master_Log_File: binlog.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: 120
              Relay_Log_Space: 444
              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: 98b6f1e4-7026-11e7-b381-e8611f1a5e44
             Master_Info_File: /data/mysql_3306/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)

节点2:
change master to master_host='192.168.10.97', master_port=3306, master_user='replicator',master_password='replicator', master_log_file='binlog.000001',master_log_pos=120;

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.10.97
                  Master_User: replicator
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: binlog.000001
          Read_Master_Log_Pos: 120
               Relay_Log_File: binlog.000002
                Relay_Log_Pos: 280
        Relay_Master_Log_File: binlog.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: 120
              Relay_Log_Space: 444
              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: cd2fab5f-7025-11e7-b37c-e8611f1a5ff8
             Master_Info_File: /data/mysql_3306/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)