部署mysql集群基础环境
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设置slave2为master1从:部署集群基础环境
1.1 问题
本案例要求为mysql集群准备基础环境,完成以下任务操作:
数据库授权
部署MySQL双主多从结构
配置本机hosts解析记录
1.2 方案
使用4台RHEL 6虚拟机,如图-1所示。其中192.168.4.10、192.168.4.11作为MySQL双主服务器,192.168.4.12、192.168.4.13作为主服务器的从服务器。
图-1
1.3 步骤
实现此案例需要按照如下步骤进行。
步骤一:准备环境
[[email protected] ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.4.10 master1 master1.tarena.com
192.168.4.11 master2 master2.tarena.com
192.168.4.12 slave1 slave1.tarena.com
192.168.4.13 slave2 slave2.tarena.com
192.168.4.100 master1 master1.tarena.com
[[email protected] ~]# ping -c 2 master1
PING master1 (192.168.4.10) 56(84) bytes of data.
64 bytes from master1 (192.168.4.10): icmp_seq=1 ttl=64 time=0.378 ms
步骤二:部署数据库主机
1)安装启动数据库(4台数据库主机master1,master2,slave1,slave2执行以下操作)
[[email protected] ~]# tar xvf MySQL-5.6.15-1.el6.x86_64.rpm-bundle.tar //解压软件包
.. ..
[[email protected] ~]# rpm -Uvh MySQL-*.rpm //安装MySQL
.. ..
[[email protected] ~]# service mysql start
2)初始化配置数据库(4台数据库主机master1,master2,slave1,slave2执行以下操作)
[[email protected] ~]# cat /root/.mysql_secret //查看随机生成密码
# The random password set for the root user at Thu May 7 22:15:47 2015 (local time): wW1BNAjD
[[email protected] ~]# mysql -uroot -pwW1BNAjD //使用随机生成密码登陆
mysql> set password=password("pwd123"); //修改数据库root密码
步骤三:部署双主多从结构
1)数据库授权(4台数据库主机master1,master2,slave1,slave2执行以下操作)
部署主从同步只需要授权一个主从同步用户即可,但是我们要部署MySQL-MMM架构,所以在这里我们将MySQL-MMM所需用户一并进行授权设置。再授权一个测试用户,在架构搭建完成时测试使用。
[[email protected] ~]# mysql -uroot -ppwd123
数据库授权部分为了方便试验我们直接允许所有地址访问了,真实环境需谨慎
mysql> grant replication slave on *.* to [email protected]"%" identified by "pwd123"; //主从同步授权
mysql> grant replication client on *.* to [email protected]"%" identified by "monitor"; //MMM所需架构用户授权
mysql> grant replication client,process,super on *.* to [email protected]"%" identified by "agent"; //MMM所需架构用户授权
mysql> grant all on *.* to [email protected]"%" identified by "pwd123"; //测试用户授权
2)开启主数据库binlog日志、设置server_id(master1,master2)
master1设置:
[[email protected] ~]# cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
server_id=10 //设置server_id,该值集群中不可以重复
log-bin //开启bin-log日志
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[[email protected] ~]# service mysql restart //重启MySQL服务
[[email protected] ~]# ls /var/lib/mysql/master1-bin* //查看binlog日志是否生成
master2设置:
[[email protected] ~]# cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
server_id=11
log-bin
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[[email protected] ~]# service mysql restart
[[email protected] ~]# ls /var/lib/mysql/master2-bin.*
3)从库设置server_id
slave1设置:
[[email protected] ~]# cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
server_id=12
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[[email protected] ~]# service mysql restart
[[email protected] ~]# cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
server_id=13
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[[email protected] ~]# service mysql restart
4)配置主从从从关系
配置master2、slave1、slave2成为master1的从服务器
查看master1服务器binlong日志使用节点信息:
[[email protected] ~]# mysql -uroot -ppwd123
.. ..
mysql> show master status\G
File: master1-bin.000001
Position: 120
设置master2为master1从:
[[email protected] ~]# mysql -uroot -ppwd123
.. ..
mysql> change master to //设置主服务器信息
-> master_host="192.168.4.10", //设置主服务器IP地址
-> master_user="slaveuser", //设置主从同步用户
-> master_password="pwd123", //设置主从同步密码
-> master_log_file="master1-bin.000001", //设置主库binlog日志名称
-> master_log_pos=120; //设置主从binlog日志使用节点
mysql> start slave; //启动同步进程
mysql> show slave status\G //查看主从是否成功
mysql> start slave;
mysql> show slave status\G
Slave_IO_Running: Yes //IO节点正常
Slave_SQL_Running: Yes //SQL节点正常\
设置slave2为master1从:
查看master2的binlog使用信息:
[[email protected] ~]# mysql -uroot -ppwd123
mysql> show master status\G
File: master2-bin.000001
Position: 120
[[email protected] ~]# mysql -uroot -ppwd123
mysql> change master to
-> master_host="192.168.4.11",
-> master_user="slaveuser",
-> master_password="pwd123",
-> master_log_file="master2-bin.000001",
-> master_log_pos=120;
mysql> start slave;
mysql> show slave status\G
.. ..
Slave_IO_Running: Yes //IO节点正常
Slave_SQL_Running: Yes //SQL节点正常
6)测试主从架构是否成功
master1更新数据,查看其它主机是否同步:
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