mysql简单复制服务搭建
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了mysql简单复制服务搭建相关的知识,希望对你有一定的参考价值。
1.安装mysql源(centos7中默认是不包含mysql源) wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm rpm -ivh mysql-community-release-el7-5.noarch.rpm yum install mysql-server 2.配置mysql-master 在my.cnf中添加: prot=3306 log-bin=master-bin log-bin-index=master-bin.index server-id=1 3.重启mysql后新增复制用户 create user repl_user; grant replication slave on *.* to repl_user identified by ‘xyzzy‘; 4.配置备机mysql 在my.cnf中添加下面几行 relay-log=slave-bin relay-log-index=slave-bin.index server-id=2 5.发现备机无法连接到master服务器 nmap -v materIP 发现没有打开ssh的22端口 故打开: firewall-cmd --zone=public --add-port=22/tcp --permanent 6.slave数据库报错 有报错信息: mysql> CHANGE MASTER TO MASTER_HOST=‘192.168.52.129‘, -> MASTER_USER=‘repl‘, -> MASTER_PASSWORD=‘repl_1234‘, -> MASTER_LOG_FILE=‘mysql-bin.000141‘, -> MASTER_LOG_POS=120; ERROR 1794 (HY000): Slave is not configuredor failed to initialize properl y. You must at least set --server-id to enableeither a master or a slave. Additional error messages can be found in the MySQLerror log. mysql>SHOW VARIABLES LIKE ‘server_id‘; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 0 | +---------------+-------+ 1 row in set (0.00 sec) id没有生效 配置里面有[mysqld]和[mysqld_safe],新增的配置文件放的位置不一样,将新增配置 放到mysqld下试试,ok成功。 mysql> show variables like ‘server_id‘; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 2 | +---------------+-------+ 1 row in set (0.00 sec) mysql> change master to -> master_host=‘192.168.122.1‘ -> ,master_port=3306, -> master_user=‘repl_user‘, -> master_password=‘xyzzy‘; Query OK, 0 rows affected, 2 warnings (0.05 sec) mysql> start slave; Query OK, 0 rows affected (0.01 sec) 测试复制是否成功: 在master上创建一个数据库: mysql> create database cydb; Query OK, 1 row affected (0.00 sec) 在slave上查看是否有此数据库: mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | cydb | | mysql | | performance_schema | +--------------------+ 4 rows in set (0.00 sec) 至此,简单的复制环境搭配成功。
以上是关于mysql简单复制服务搭建的主要内容,如果未能解决你的问题,请参考以下文章
mysql5.7 主从复制简单环境搭建以及开启半同步复制等配置