Master：192.168.30.45
Slave: 192.168.30.46
Master配置：
#my.cnf
server-id=100
log_bin = mysql-bin
binlog-format = row
log-slave-updates = true
#创建同步用户
>grant replication slave on *.* to 'repl'@'%' identified by '123';
Slave配置：
#my.cnf
server-id=200
log_bin = mysql-bin
relay_log = relay-bin
binlog-format = row
log-slave-updates = true
修改好配置文件后，分别重启主从库
Master查看：
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000008 | 925 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
配置Slave:
#多行写法：
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.30.45',
-> MASTER_USER='repl',
-> MASTER_PASSWORD='123',
-> MASTER_LOG_FILE='mysql-bin.000008',
-> MASTER_LOG_POS=589;
#一行写法：
>CHANGE MASTER TO MASTER_HOST='192.168.30.45', MASTER_USER='repl', MASTER_PASSWORD='123', MASTER_LOG_FILE='mysql-bin.000008', MASTER_LOG_POS=589;
#启动从服务器复制线程
>start slave;
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.30.45
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 925
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 656
Relay_Master_Log_File: mysql-bin.000008
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Slave_IO_State #从站的当前状态
Slave_IO_Running： Yes #读取主程序二进制日志的I/O线程是否正在运行
Slave_SQL_Running： Yes #执行读取主服务器中二进制日志事件的SQL线程是否正在运行。与I/O线程一样
Seconds_Behind_Master #是否为0，0就是已经同步了
创建测试案例：
Master主库：
>create database zhang;
>use zhang;
>create table zhang(id int(11) not null);
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000008 | 925 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql> show slave hosts;
+-----------+------+------+-----------+--------------------------------------+
| Server_id | Host | Port | Master_id | Slave_UUID |
+-----------+------+------+-----------+--------------------------------------+
| 90 | | 3306 | 100 | d0213846-8e33-11e7-becc-000c29cf61b1 |
+-----------+------+------+-----------+--------------------------------------+
1 row in set (0.00 sec)
mysql> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 177 |
| mysql-bin.000002 | 177 |
| mysql-bin.000003 | 177 |
| mysql-bin.000004 | 177 |
| mysql-bin.000005 | 177 |
| mysql-bin.000006 | 177 |
| mysql-bin.000007 | 177 |
| mysql-bin.000008 | 925 |
+------------------+-----------+
8 rows in set (0.00 sec)
mysql> show binlog events;
+------------------+-----+----------------+-----------+-------------+---------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+------------------+-----+----------------+-----------+-------------+---------------------------------------+
| mysql-bin.000001 | 4 | Format_desc | 1 | 123 | Server ver: 5.7.19-log, Binlog ver: 4 |
| mysql-bin.000001 | 123 | Previous_gtids | 1 | 154 | |
| mysql-bin.000001 | 154 | Stop | 1 | 177 | |
+------------------+-----+----------------+-----------+-------------+---------------------------------------+
3 rows in set (0.00 sec)
mysql> show binlog events in 'mysql-bin.000001';
+------------------+-----+----------------+-----------+-------------+---------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+------------------+-----+----------------+-----------+-------------+---------------------------------------+
| mysql-bin.000001 | 4 | Format_desc | 1 | 123 | Server ver: 5.7.19-log, Binlog ver: 4 |
| mysql-bin.000001 | 123 | Previous_gtids | 1 | 154 | |
| mysql-bin.000001 | 154 | Stop | 1 | 177 | |
+------------------+-----+----------------+-----------+-------------+---------------------------------------+
3 rows in set (0.01 sec)
Slave数据库启动：
>start slave;
>stop slave;
半同步复制安装配置：
[root@localhost plugin]# cd /app/local/mysql/lib/plugin/
[root@localhost plugin]# ls semisync_*
semisync_master.so semisync_slave.so
[root@localhost plugin]#
Master配置：
mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';
mysql> set global rpl_semi_sync_master_enabled=1;
Query OK, 0 rows affected (0.00 sec)
Slave配置:
mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';
mysql> set global rpl_semi_sync_slave_enabled=1;
#my.cnf
rpl_semi_sync_master_enabled = 1
rpl_semi_sync_slave_enabled = 1
set global rpl_semi_sync_master_timeout = 10000 10000毫秒=10秒
rpm_semi_sync_master_wait_no_salve
rpl_semi_sync_slave_trace_level = 32
mysql> show status like '%semi%';
+--------------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients | 0 |
| Rpl_semi_sync_master_net_avg_wait_time | 0 |
| Rpl_semi_sync_master_net_wait_time | 0 |
| Rpl_semi_sync_master_net_waits | 0 |
| Rpl_semi_sync_master_no_times | 0 |
| Rpl_semi_sync_master_no_tx | 0 |
| Rpl_semi_sync_master_status | ON |
| Rpl_semi_sync_master_timefunc_failures | 0 |
| Rpl_semi_sync_master_tx_avg_wait_time | 0 |
| Rpl_semi_sync_master_tx_wait_time | 0 |
| Rpl_semi_sync_master_tx_waits | 0 |
| Rpl_semi_sync_master_wait_pos_backtraverse | 0 |
| Rpl_semi_sync_master_wait_sessions | 0 |
| Rpl_semi_sync_master_yes_tx | 0 |
+--------------------------------------------+-------+
14 rows in set (0.00 sec)
>show variables like '%rpl_semi_sync%';
>show status like '%rpl_semi_sync%';
