MySql配置
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- 修改3服务上的MySql配置文件
[root@node2 mysql]# vim /etc/my.cnf [mysqld] basedir=/home/console/mysql datadir=/home/console/mysql/data port=3306 #端口 server-id=1 #服务id #mysql双主配置 #binlog-do-db=test #需要记录到二进制日志的数据库 binlog-ignore_db=mysql #忽略记录二进制日志的数据库 #replicate-do-db=test #指定复制的数据库 replicate_ignore_db=mysql #不复制的数据库 binlog-ignore-db=information_schema #不复制的数据库 binlog-ignore-db=performance_schema #不复制的数据库 log-slave-updates=1 #该从库是否写入二进制日志，如果需要成为多主则可启用。只读可以不需要 auto_increment_offset=2 #该服务器自增列的初始值 auto_increment_increment=2 #该服务器自增列增量 relay_log=mysql-relay-bin #从库的中继日志，主库日志写到中继日志，中继日志再重做到从库 log-bin=mysql-bin max_connections=151 max_connect_errors=30 default-storage-engine=InnoDB transaction_isolation=REPEATABLE-READ socket=/home/console/mysql/tmp/mysql.sock sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES interactive_timeout=28800 wait_timeout=28800 [client] socket=/home/console/mysql/tmp/mysql.sock [mysqld] init_connect='SET collation_connection = utf8_unicode_ci' init_connect='SET NAMES utf8' character-set-server=utf8 collation-server=utf8_unicode_ci skip-name-resolve skip-character-set-client-handshake [client] default-character-set=utf8 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid -
- 修改4服务上的MySql配置
[root@node3 mysql]# vim /etc/my.cnf [mysqld] basedir=/home/console/mysql datadir=/home/console/mysql/data port=3306 #端口 server-id=2 #服务id #mysql双主配置 #binlog-do-db=test #需要记录到二进制日志的数据库 binlog-ignore_db=mysql #忽略记录二进制日志的数据库 #replicate-do-db=test #指定复制的数据库 replicate_ignore_db=mysql #不复制的数据库 binlog-ignore-db=information_schema #不复制的数据库 binlog-ignore-db=performance_schema #不复制的数据库 log-slave-updates=1 #该从库是否写入二进制日志，如果需要成为多主则可启用。只读可以不需要 auto_increment_offset=1 #该服务器自增列的初始值 auto_increment_increment=2 #该服务器自增列增量 relay_log=mysql-relay-bin #从库的中继日志，主库日志写到中继日志，中继日志再重做到从库 log-bin=mysql-bin max_connections=151 max_connect_errors=30 default-storage-engine=InnoDB transaction_isolation=REPEATABLE-READ socket=/home/console/mysql/tmp/mysql.sock sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES interactive_timeout=28800 wait_timeout=28800 [client] socket=/home/console/mysql/tmp/mysql.sock [mysqld] init_connect='SET collation_connection = utf8_unicode_ci' init_connect='SET NAMES utf8' character-set-server=utf8 collation-server=utf8_unicode_ci skip-name-resolve skip-character-set-client-handshake [client] default-character-set=utf8 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid 需注意，3与4MySql服务的server-id不能相同。 如果为多主的话注意设置 auto-increment-offset 和 auto-increment-increment 如上面为双主的设置： 服务器 4 自增列显示为：1,3,5,7,……（offset=1，increment=2） 服务器 3 自增列显示为：2,4,6,8,……（offset=2，increment=2） -
- 重启3，4两台服务器上的MySql
[root@node3 mysql]# service mysqld restart
搭建MySql双主
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- 连接数据库查看日志记录位置相关信息
[root@node3 mysql]# cd bin/ [root@node3 bin]# ./mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 10 Server version: 5.7.21-log MySQL Community Server (GPL) Copyright (c) 2000, 2018, 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> flush logs; mysql> show master status; +------------------+----------+--------------+---------------------------------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+---------------------------------------------+-------------------+ | mysql-bin.000005 | 154 | | mysql,information_schema,performance_schema | | +------------------+----------+--------------+---------------------------------------------+-------------------+ 1 row in set (0.00 sec) File :当前正在记录的二进制日志文件 Position ：记录偏移量，日志 mysql-bin.000008 所记录到的位置。 Binlog_Do_DB ：要记录日志的数据库 Binlog_Ignore_DB ：不记录日志的数据库 Executed_Gtid_Set ：已执行的事务ID -
- 查看二进制日志情况
mysql> show variables like '%log_bin%'; +---------------------------------+------------------------------------------+ | Variable_name | Value | +---------------------------------+------------------------------------------+ | log_bin | ON | | log_bin_basename | /home/console/mysql/data/mysql-bin | | log_bin_index | /home/console/mysql/data/mysql-bin.index | | log_bin_trust_function_creators | OFF | | log_bin_use_v1_row_events | OFF | | sql_log_bin | ON | +---------------------------------+------------------------------------------+ 6 rows in set (0.00 sec) -
- 连接上3数据库，创建slave 4同步账号
mysql> grant replication slave on *.* to 'repl_user'@'172.16.33.4' identified by 'slave@4'; -
- 获取3数据日志记录位置相关信息
mysql> show master status; +------------------+----------+--------------+---------------------------------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+---------------------------------------------+-------------------+ | mysql-bin.000005 | 154 | | mysql,information_schema,performance_schema | | +------------------+----------+--------------+---------------------------------------------+-------------------+ 1 row in set (0.00 sec) -
- 连接上4数据库，使用刚在3数据库创建的同步账号连接到master主库（3）
mysql> CHANGE MASTER TO MASTER_HOST='172.16.33.3', MASTER_USER='repl_user', MASTER_PASSWORD='slave@4', MASTER_PORT=3406, MASTER_LOG_FILE='mysql-bin.000005', MASTER_LOG_POS=154; 说明： MASTER_HOST 主节点ip MASTER_USER 用户名 MASTER_PASSWORD 密码 MASTER_LOG_FILE 3服务正在记录的二进制日志文件（实时获取） MASTER_LOG_POS 3服务记录二进制日志的偏移量（实时获取） -
- 连接上4数据库，创建slave（3）同步账号
mysql> grant replication slave on *.* to 'repl_user'@'172.16.33.3' identified by 'slave@3'; -
- 获取4数据日志记录位置相关信息
mysql> show master status; +------------------+----------+--------------+---------------------------------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+---------------------------------------------+-------------------+ | mysql-bin.000004 | 154 | | mysql,information_schema,performance_schema | | +------------------+----------+--------------+---------------------------------------------+-------------------+ 1 row in set (0.00 sec) -
- 连接上3数据库，使用刚在4数据库创建的同步账号连接到master主库（4）
mysql> CHANGE MASTER TO MASTER_HOST='172.16.33.4', MASTER_USER='repl_user', MASTER_PASSWORD='slave@3', MASTER_PORT=3406, MASTER_LOG_FILE='mysql-bin.000004', MASTER_LOG_POS=154; 说明： MASTER_HOST 主节点ip MASTER_USER 用户名 MASTER_PASSWORD 密码 MASTER_LOG_FILE 4服务正在记录的二进制日志文件（实时获取） MASTER_LOG_POS 4服务记录二进制日志的偏移量（实时获取） -
- 重启3，144MySql数据库
[root@node3 mysql]# service mysqld restart
开启防火墙端口
#查看端口是否占用
netstat -anp |grep 3406
# 查看防火墙状态
systemctl status firewalld
firewall-cmd --state
# 开启3406端口
firewall-cmd --zone=public --add-port=3306/tcp --permanent
# 重启防火墙
firewall-cmd --reload
# 查看端口
firewall-cmd --list-ports
firewall-cmd --zone=public --add-port=5119/tcp --permanent
5119/tcp