新环境搭建Mysql主从

发布时间：2020-08-10 21:51:11 来源：ITPUB博客阅读：118 作者：stonebox1122 栏目：MySQL数据库

环境信息：

用途	IP	OS	Mysql
主	10.163.84.16	RHEL 6.5_X64	mysql-5.7.16-linux-glibc2.5-x86_64.tar.gz
从	10.163.84.17	RHEL 6.5_X64	mysql-5.7.16-linux-glibc2.5-x86_64.tar.gz

1、Mysql安装
参考http://blog.itpub.net/28536251/viewspace-2138854分别在两节点安装Mysql。

2、主节点配置
（1）修改配置文件
[root@dbrac16 ~]# vim /etc/my.cnf
[mysqld]
datadir=/usr/local/mysql/data
socket=/usr/local/mysql/mysql.sock
user=mysql
symbolic-links=0
character-set-server=utf8

server-id = 8416
log-bin=/usr/local/mysql/data/mysql-bin
binlog_format=mixed

slow-query-log
long_query_time=3
log-output=TABLE
expire_logs_days = 7
event_scheduler=1
innodb_file_per_table=1
innodb_log_file_size=536870912
innodb_buffer_pool_size=1073741824
max_binlog_size=1073741824
log_bin_trust_function_creators=1
innodb_stats_on_metadata=0
max_connect_errors = 1000000
max_connections = 5000
skip_name_resolve = 1
explicit_defaults_for_timestamp=true

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/usr/local/mysql/my.pid

[client]
socket=/usr/local/mysql/mysql.sock

[mysql]
prompt=(\u@\h)[\d]\_

（2）重启Mysql
[root@dbrac16 ~]# /etc/init.d/mysqld restart
Shutting down MySQL..... SUCCESS!
Starting MySQL. SUCCESS!

（3）创建复制用户
(root@localhost)[(none)] GRANT REPLICATION SLAVE ON *.* TO 'repl'@'10.163.84.%' IDENTIFIED BY 'repl';
Query OK, 0 rows affected, 1 warning (0.06 sec)

(root@localhost)[(none)] flush privileges;
Query OK, 0 rows affected (0.08 sec)

（4）获取日志信息
(root@localhost)[(none)] show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 |      154 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.01 sec)

3、从节点配置
（1）修改配置文件
[root@dbrac17 ~]# vim /etc/my.cnf
[mysqld]
datadir=/usr/local/mysql/data
socket=/usr/local/mysql/mysql.sock
user=mysql
symbolic-links=0
character-set-server=utf8

server-id=8417

slow-query-log
long_query_time=3
log-output=TABLE
expire_logs_days = 7
event_scheduler=1
innodb_file_per_table=1
innodb_log_file_size=536870912
innodb_buffer_pool_size=1073741824
max_binlog_size=1073741824
log_bin_trust_function_creators=1
innodb_stats_on_metadata=0
max_connect_errors = 1000000
max_connections = 5000
skip_name_resolve = 1
explicit_defaults_for_timestamp=true

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/usr/local/mysql/my.pid

[client]
socket=/usr/local/mysql/mysql.sock

[mysql]
prompt=(\u@\h)[\d]\_

（2）删除auto.cnf文件
[root@dbrac17 ~]# rm /usr/local/mysql/data/auto.cnf
rm: remove regular file `/usr/local/mysql/data/auto.cnf'? y

（3）重启Mysql
[root@dbrac17 ~]# /etc/init.d/mysqld restart
Shutting down MySQL..... SUCCESS!
Starting MySQL. SUCCESS!

（4）配置到主节点的连接
(root@localhost)[(none)] CHANGE MASTER TO MASTER_HOST='10.163.84.16',MASTER_PORT=3306,MASTER_USER='repl',MASTER_PASSWORD='repl',MASTER_LOG_FILE='mysql-bin.000002',MASTER_LOG_POS=154;
Query OK, 0 rows affected, 2 warnings (0.05 sec)

（5）启动复制并查看状态
(root@localhost)[(none)] start slave;
Query OK, 0 rows affected (0.03 sec)

(root@localhost)[(none)] show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.163.84.16
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 154
               Relay_Log_File: dbrac17-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000002
             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: 154
              Relay_Log_Space: 529
              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: 8416
                  Master_UUID: 3de828ce-354c-11e7-9f0b-0050568a4cf6
             Master_Info_File: /usr/local/mysql/data/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:
            Executed_Gtid_Set:
                Auto_Position: 0
         Replicate_Rewrite_DB:
                 Channel_Name:
           Master_TLS_Version:
1 row in set (0.02 sec)

Slave_IO_Running: Yes表示获取日志正常。
Slave_SQL_Running: Yes表示日志应用正常。

4、测试
（1）主节点创建库，表并插入数据
(root@localhost)[(none)] create database test;
Query OK, 1 row affected (0.01 sec)

(root@localhost)[(none)] use test;
Database changed

(root@localhost)[test] create table tb1(id int);
Query OK, 0 rows affected (0.07 sec)

(root@localhost)[test] insert into tb1 values(1);
Query OK, 1 row affected (0.04 sec)

（2）从节点查看
(root@localhost)[(none)] use test
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
(root@localhost)[test] select * from tb1;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.01 sec)

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