mysql主从在目前企业中很常见的方案之一,主是将DML,DDL,DML语句用mysql dump进程将二进制日志记录,从是用thread_io线程读取主上的制日志存放中继日志中,再用thread_sql线程读取中继日志将数据写入到数据库,实现数据同步.
mysql dba技术群 378190849
武汉-linux运维群 236415619
架构规划:
tong1:192.168.1.247
tong2:192.168.1.248
1.配置网络
tong1节点:
[root@tong1 ~]# hostname
tong1
[root@tong1 ~]# cat /etc/hosts
192.168.1.247 tong1
192.168.1.248 tong2
[root@tong1 ~]#
tong2节点:
[root@tong2 ~]# hostname
tong2
[root@tong2 ~]# cat /etc/hosts
192.168.1.247 tong1
192.168.1.248 tong2
[root@tong2 ~]#
2.下载安装mysql数据库
在两个节点安装mysql数据库
[root@tong1 ~]# wget http://mirrors.sohu.com/mysql/MySQL-5.6/mysql-5.6.23-linux-glibc2.5-x86_64.tar.gz
[root@tong1 ~]# tar xvf mysql-5.6.23-linux-glibc2.5-x86_64.tar.gz -C /usr/local/
[root@tong1 ~]# cd /usr/local/
[root@tong1 ~]# mv mysql-5.6.23-linux-glibc2.5-x86_64/ mysql-5.6.23
[root@tong1 ~]# cd mysql-5.6.23/
[root@tong1 ~]# ./scripts/mysql_install_db --user=mysql --group=mysql --basedir=/usr/local/mysql-5.6.23 --datadir=/usr/local/mysql-5.6.23/data
[root@tong1 ~]# cp -a my.cnf /etc/
[root@tong1 ~]# cp -a support-files/mysql.server /etc/init.d/mysqld
[root@tong1 ~]# chkconfig --add mysqld
[root@tong1 ~]# chkconfig mysqld on
[root@tong1 ~]# vim /etc/my.cnf
basedir = /usr/local/mysql-5.6.23
datadir = /usr/local/mysql-5.6.23/data
port = 3306
server_id = 20
socket = /tmp/mysql.sock
[root@tong1 ~]# pkill mysqld
[root@tong1 ~]# /etc/init.d/mysqld restart
[root@tong1 ~]# /usr/local/mysql-5.6.23/bin/mysqladmin -u root password 'system'
[root@tong1 ~]# /usr/local/mysql-5.6.23/bin/mysql -u root -p --输入密码system
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.23 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> exit
Bye
[root@tong1 ~]#
3.在主库上开启二进制日志和防火墙
tong1节点:
[root@tong1 ~]# vim /etc/my.cnf
basedir = /usr/local/mysql-5.6.23
datadir = /usr/local/mysql-5.6.23/data
port = 3306
server_id = 20
socket = /tmp/mysql.sock
log-bin=mysql-bin
log-bin-index=mysql-bin-index
[root@tong1 ~]# vim /etc/sysconfig/iptables
-A INPUT -m state --state NEW -m tcp -p tcp -s 192.168.1.248 --dport 3306 -j ACCEPT
[root@tong1 ~]# /etc/init.d/iptables restart
iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]
iptables: Applying firewall rules: [ OK ]
[root@tong1 ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
[root@tong1 ~]# /usr/local/mysql-5.6.23/bin/mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.23 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> grant replication slave ,replication client on *.* to repl_user@'192.168.1.248' identified by 'system!#%246';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> create database tong;
Query OK, 1 row affected (0.00 sec)
mysql> show master status ;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 528 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql>
4.在从库上配置复制主库的数据
[root@tong2 mysql-5.6.23]# vim /etc/my.cnf
basedir = /usr/local/mysql-5.6.23
datadir = /usr/local/mysql-5.6.23/data
port = 3306
server_id = 10
socket = /tmp/mysql.sock
replicate-do-db=tong
replicate-ignore-db=mysql
[root@tong2 mysql-5.6.23]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
[root@tong2 mysql-5.6.23]# /usr/local/mysql-5.6.23/bin/mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.23 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database tong;
Query OK, 1 row affected (0.00 sec)
mysql> change master to master_host='192.168.1.247',master_user='repl_user',master_password='system!#%246',master_port=3306,master_log_file='mysql-bin.000001',master_log_pos=528;
Query OK, 0 rows affected, 2 warnings (0.43 sec)
mysql> start slave;
Query OK, 0 rows affected (0.03 sec)
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.247
Master_User: repl_user
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 528
Relay_Log_File: tong2-relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: tong
Replicate_Ignore_DB: mysql
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: 528
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: 20
Master_UUID: 3de2c8c6-ed4c-11e4-9392-1078d2c78303
Master_Info_File: /usr/local/mysql-5.6.23/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)
mysql>
5.验证主从同步
tong1主库:
[root@tong1 mysql-5.6.23]# /usr/local/mysql-5.6.23/bin/mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.23 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> \u tong
Database changed
mysql> create table t (a int);
Query OK, 0 rows affected (0.29 sec)
mysql> insert into t values(1),(2),(3);
Query OK, 3 rows affected (0.03 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> select * from t;
+------+
| a |
+------+
| 1 |
| 2 |
| 3 |
+------+
3 rows in set (0.00 sec)
mysql>
tong2从库验证数据:
[root@tong2 mysql-5.6.23]# /usr/local/mysql-5.6.23/bin/mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.23 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> \u tong
mysql> select * from t;
+------+
| a |
+------+
| 1 |
| 2 |
| 3 |
+------+
3 rows in set (0.00 sec)
mysql>
