--------------------------------------------

安装准备

配置/etc/my.cnf

主master grant 分配复制帐号

从slave  change ；开启slave；查看状态；

验证一致性

--------------------------------------------

当一个事务在主库端执行并提交时，产生GTID，一同记录到binlog日志中。

binlog传输到slave，并存储到slave的relaylog后，读取这个GTID值设置gtid_next变量，告诉slave，下一个要执行的GTID值。sql线程从relay log中获取GTID，然后对比slave端的binlog是否有该GTID。如果有记录，说明该GTID的事务已经执行过，slave就会忽略。如果没有记录，slave就会执行该GTID事务，记录该GTID到自身的binlog，再读取执行事务前会先检查其他session持有该GTID，确保不被重复执行。在解析过程中会判断是否有主键，如果没有就用二级索引，如果没有就用全部扫面。

--------------------------------------------

mysql-5.7.17-1.el6.x86_64.rpm-bundle.tar 

tar xf mysql-5.7.17-1.el6.x86_64.rpm-bundle.tar

yum install -y mysql-community-client-5.7.17-1.el6.x86_64.rpm mysql-community-common-5.7.17-1.el6.x86_64.rpm mysql-community-libs-5.7.17-1.el6.x86_64.rpm mysql-community-libs-compat-5.7.17-1.el6.x86_64.rpm mysql-community-server-5.7.17-1.el6.x86_64.rpm

/etc/init.d/mysqld start             ##开启服务，初始化，得到一个uuid和临时秘密

2017-03-28T00:46:21.597691Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: f6701f68-134f-11e7-94e7-52540022095a.

2017-03-28T00:46:21.664060Z 1 [Note] A temporary password is generated for root@localhost: I-S>yshos7JT

[root@server3 ~]# mysql -uroot -p        ##修改密码

Enter password: 

mysql> alter user root@localhost identified by 'Redhat-1024';

Query OK, 0 rows affected (0.09 sec)

vim /etc/my.cnf                    ##编辑文件，进行配置

 server-id=3

 gtid-mode=ON

 enforce-gtid-consistency=1                ##开启gtid的一些安全限制

 log-bin=mysql-bin

 binlog-do-db=test

 binlog-ignore-db=mysql

 log-slave-updates

/etc/init.d/mysqld restart            ##更改配置，重启服务

mysql> show master status;            ##查看主节点状态

+------------------+----------+--------------+------------------+-------------------+

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000004 |      154 | test         | mysql            |                   |

+------

mysql> grant replication slave on *.* to ly@'172.25.38.%' identified by 'Redhat-1024';##分配复制帐号

Query OK, 0 rows affected, 1 warning (0.10 sec)

--------------------------------------------

[root@server4 ~]# /etc/init.d/mysqld start

2017-03-28T00:47:40.538466Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 257d874a-1350-11e7-b4ab-525400e717cb.

2017-03-28T00:47:40.661188Z 1 [Note] A temporary password is generated for root@localhost: Aozj4uC:4iff

[root@server4 ~]# mysql -uroot -p

Enter password: 

mysql> alter user root@localhost identified by 'Redhat-1024';

Query OK, 0 rows affected (0.40 sec)

[root@server4 ~]# /etc/init.d/mysqld restart

[root@server4 ~]# mysql -uroot -p

Enter password:

mysql> change master to master_host='172.25.38.3',master_user='ly',master_password='Redhat-1024',master_auto_position=1;##

mysql> show slave status\G;

   Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

           Retrieved_Gtid_Set: f6701f68-134f-11e7-94e7-52540022095a:1

            Executed_Gtid_Set: f6701f68-134f-11e7-94e7-52540022095a:1

[root@server3 mysql]# mysql -p

Enter password: 

[root@server3 mysql]# cat auto.cnf 

[auto]

server-uuid=f6701f68-134f-11e7-94e7-52540022095a

mysql> show global variables like '%gtid%';

+----------------------------------+------------------------------------------+

| Variable_name                    | Value                                    |

+----------------------------------+------------------------------------------+

| binlog_gtid_simple_recovery      | ON                                       |

| enforce_gtid_consistency         | ON                                       |

| gtid_executed                    | f6701f68-134f-11e7-94e7-52540022095a:1-7 |

| gtid_executed_compression_period | 1000                                     |

| gtid_mode                        | ON                                       |

| gtid_owned                       |                                          |

| gtid_purged                      |                                          |

| session_track_gtids              | OFF                                      |

+----------------------------------+------------------------------------------+

[root@server4 mysql]# cat auto.cnf 

[auto]

server-uuid=257d874a-1350-11e7-b4ab-525400e717cb

mysql> show global variables like '%gtid%';

+----------------------------------+------------------------------------------+

| Variable_name                    | Value                                    |

+----------------------------------+------------------------------------------+

| binlog_gtid_simple_recovery      | ON                                       |

| enforce_gtid_consistency         | ON                                       |

| gtid_executed                    | f6701f68-134f-11e7-94e7-52540022095a:1-7 |

| gtid_executed_compression_period | 1000                                     |

| gtid_mode                        | ON                                       |

| gtid_owned                       |                                          |

| gtid_purged                      | f6701f68-134f-11e7-94e7-52540022095a:1-6 |

| session_track_gtids              | OFF                                      |

+----------------------------------+------------------------------------------+

mysql> grant replication slave on *.* to ly@'172.25.38.%' identified by 'Redhat-1024';

mysql> change master to master_host='172.25.38.3',master_user='ly',master_password='Redhat-1024',master_auto_position=1;

mysql> start slave;

mysql> show slave status\G;

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

mysql> insert into usertb values(0004,'xiao');

Query OK, 1 row affected (0.13 sec)

Master_Host: 172.25.38.3

Master_User: ly

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000004

Read_Master_Log_Pos: 445

Relay_Log_File: server4-relay-bin.000002

Relay_Log_Pos: 658

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: 445

Relay_Log_Space: 867

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: 3

Master_UUID: f6701f68-134f-11e7-94e7-52540022095a

Master_Info_File: /var/lib/mysql/master.info

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

Master_Retry_Count: 86400

Master_Bind: 

Last_IO_Error_Timestamp: 

Last_SQL_Error_Timestamp: 

Master_SSL_Crl: 

Master_SSL_Crlpath: 

Retrieved_Gtid_Set: f6701f68-134f-11e7-94e7-52540022095a:1

Executed_Gtid_Set: f6701f68-134f-11e7-94e7-52540022095a:1

Auto_Position: 1

Replicate_Rewrite_DB: 

Channel_Name: 

Master_TLS_Version: 

1 row in set (0.00 sec)

mysql> select * from test.usertb

    -> ;

+----+----------+

| id | name     |

+----+----------+

|  1 | zhangsan |

|  2 | wang     |

|  3 | lisi     |

+----+----------+

mysql> insert into usertb values(0004,'xiao');

Query OK, 1 row affected (0.13 sec)

mysql> select * from test.usertb;

+----+----------+

| id | name     |

+----+----------+

|  1 | zhangsan |

|  2 | wang     |

|  3 | lisi     |

|  4 | xiao     |

+----+----------+