MySQL主主复制+Keepalived打造高可用MySQL集群的步骤
发布时间:2022-01-16 11:26:56 所属栏目:MySql教程 来源:互联网
导读:这篇文章主要介绍MySQL主主复制+Keepalived打造高可用MySQL集群的步骤,在日常操作中,相信很多人在MySQL主主复制+Keepalived打造高可用MySQL集群的步骤问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答MySQL主主复制+Keepali
![]() 这篇文章主要介绍“MySQL主主复制+Keepalived打造高可用MySQL集群的步骤”,在日常操作中,相信很多人在MySQL主主复制+Keepalived打造高可用MySQL集群的步骤问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”MySQL主主复制+Keepalived打造高可用MySQL集群的步骤”的疑惑有所帮助!接下来,请跟着小编一起来学习吧! 以下内容均是实验环境,请根据实际情况修改响应参数 实验环境: mysql1 ip:10.1.1.20 mysql2 ip:10.1.1.21 mysql vip:10.1.1.25 三台机器均安装centos 6.5_x64(虚拟机环境) 实验开始 一、安装mysql,并打造主主同步。 相信主从同步大家都会做,一样的道理,主主同步就是两台机器互为主的关系,在任何一台机器上写入都会同步。 安装mysql的过程不解释,yum就好啦 配置主主同步 1.配置 /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 log-bin=binlog #开启binlog功能 log-bin-index=binlog.index sync_binlog=0 server_id = 1 #两台机器不能重复一个server_id=1一个server_id=2 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid 2.分别在两台机器上配置同步账号 10.1.1.20机器上: [root@localhost ~]# mysql Welcome to the MySQL monitor. Commands end with; or g. Your MySQL connection id is 2 Server version: 5.0.77-log Sourcedistribution Type 'help;' or 'h' for help. Type 'c' toclear the buffer. mysql> GRANT replication slave ON *.* TO'ab'@'%' identified by '123'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) 10.1.1.21机器上: [root@localhost ~]# mysql Welcome to the MySQL monitor. Commands end with; or g. Your MySQL connection id is 2 Server version: 5.0.77-log Sourcedistribution Type 'help;' or 'h' for help. Type 'c' toclear the buffer. mysql> GRANT replication slave ON *.* TO'ab'@'%' identified by '123'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) 注:由于本文是实验环境下编写,所以没考虑任何安全性问题,同步账号也是最高权限,请根据实际情况设置响应权限!! 3.设置同步 10.1.1.20机器上: mysql> flush tables with read lock; mysql> show master status; +---------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB |Binlog_Ignore_DB | +---------------+----------+--------------+------------------+ | binlog.000003 | 365 | | | +---------------+----------+--------------+------------------+ 1 row in set (0.03 sec) mysql> unlock tables; Query OK, 0 rows affected (0.03 sec) 10.1.1.21机器上: mysql> change master tomaster_host='10.1.1.20', master_port=3306, master_user='ab',master_password='123', master_log_file='binlog.000003',master_log_pos=365; Query OK, 0 rows affected (0.06 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status G #执行这命令后 注意观察下面这两个参数,必须要都是yes才行 Slave_IO_Running: Yes Slave_SQL_Running: Yes 同样的 反过来做相同操作 10.1.1.21机器上: mysql> flush tables with read lock; mysql> show master status; +---------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB |Binlog_Ignore_DB | +---------------+----------+--------------+------------------+ | binlog.000004 | 207 | | | +---------------+----------+--------------+------------------+ 1 row in set (0.03 sec) mysql> unlock tables; Query OK, 0 rows affected (0.03 sec) 10.1.1.20机器上: mysql> change master tomaster_host='10.1.1.21', master_port=3306, master_user='ab',master_password='123', master_log_file='binlog.000004',master_log_pos=207; Query OK, 0 rows affected (0.06 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec) mysql> show slave status G #执行这命令后 注意观察下面这两个参数,必须要都是yes才行 Slave_IO_Running: Yes Slave_SQL_Running: Yes 介此,主主同步打造完成,可以简单测试一下,分别在两个机器上写数据 看看会不会同步到另一台机器上 PS:如果报错Slave_IO_Running: NO可以检查同步的账号是否创建正常! 二、安装keepalived并设置监控 keepalived是安装在两台MySQL服务器上的 首先安装keepalived过程不解释就正常解压安装就好 安装后配置vim /etc/keepalived/keepalived.conf内容如下 10.1.1.20的配置文件 ! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state backup #两台配置此处均是BACKUP interface eth0 virtual_router_id 51 priority 100 #优先级,另一台改为90 advert_int 1 nopreempt #不抢占,只在优先级高的机器上设置即可,优先级低的机器不设置 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 10.1.1.25 } } virtual_server 10.1.1.25 3306 { delay_loop 6 lb_algo wrr lb_kind DR persistence_timeout 50 #会话保持时间 protocol TCP real_server 10.1.1.20 3306 { weight 3 notify_down /tmp/killprocess.sh #检测到mysqld服务挂了执行此脚本(脚本要自己写) TCP_CHECK { connect_timeout 10 #连接超时时间 nb_get_retry 3 #重连次数 delay_before_retry 3 #重连间隔时间 connect_port 3306 #健康检查端口 } } } 10.1.1.21的配置文件 ! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state backup interface eth0 virtual_router_id 51 priority 90 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 10.1.1.25 } } virtual_server 10.1.1.25 3306 { delay_loop 6 lb_algo wrr lb_kind DR persistence_timeout 50 protocol TCP real_server 10.1.1.21 3306 { weight 3 notify_down /tmp/killprocess.sh TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } } } 编写监控mysql服务是否挂了的脚本,按照上面配置文件的位置编写脚本。 # vim /tmp/killprocess.sh #!/bin/sh pkill keepalived 脚本很简单就一句,目的是当keepalived检测到mysql服务挂了之后触发该脚本,杀死keepalived进程,让另一台服务器来接管 修改后启动keeplived服务 # service keeplived start 介此整个集群搭建完成 三、测试 找台机器用虚拟ip连接mysql [root@localhost html]# mysql -uab -h 10.1.1.25 -p123 Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 736 Server version: 5.1.66-log Source distribution Copyright (c) 2000, 2012, 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> 成功连上了,然后可以任意关闭某台机器,或者某台机器的mysql服务,看看还能不能连上!! 到此,关于“MySQL主主复制+Keepalived打造高可用MySQL集群的步骤”的学习就结束了,希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习,快去试试吧! (编辑:威海站长网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |