mysql 8 集群搭建

1.下载必要的rpm包

登录mysql官网下载:https://dev.mysql.com/downloads/mysql/

我系统是centos 7 的所以选择红帽的操作系统

2.安装mysql 先用sudo root运行,我这是直接su root切换了root用户

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yum remove mariadb-libs rpm -ivh mysql-community-common-8.0.20-1.el7.x86_64.rpm rpm -ivh mysql-community-libs-8.0.20-1.el7.x86_64.rpm rpm -ivh mysql-community-client-8.0.20-1.el7.x86_64.rpm rpm -ivh mysql-community-server-8.0.20-1.el7.x86_64.rpm

　　

 

 3.启动mysql

1	service mysqld start

 

 4.查看密码

1	grep \'temporary password\' /var/log/mysqld.log

　

 

  5.修改密码

 

1	mysql -uroot -p

　　输入密码

1	#Root_123456 是新密码,如果出现<br>ERROR 1819 (HY000): Your password does not satisfy the current policy requirements<br>是因为密码太简单,要改成带特殊字符的复杂密码

1	alter user \'root\'@\'localhost\' IDENTIFIED BY \'#Root_123456\';

　　

 

 

修改成功

 6:设置允许远程登录

 

1 2	use mysql; update user set host=\'%\' where user = \'root\';

　

 

 

然后重启mysql

1	service mysqld restart

7.搭建集群　　

　准备三台集群

修改hosts文件

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vi /etc/hosts<br> 192.168.10.11 linux1 192.168.10.12 linux2 192.168.10.13 linux3

设置免密

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ssh-keygen -t rsa ssh-copy-id linux1 ssh-copy-id linux2 ssh-copy-id linux3

设置远程登录并且刷新

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grant all privileges on *.* to \'root\'@\'%\' with grant option;   flush privileges;

 

 

安装 mysqlsh

1	rpm -ivh mysql-shell-8.0.20-1.el7.x86_64.rpm

　　

　　

 

 

登录linux2安装mysql8

在linux2/linu3从linux1 拷贝所有rpm包到本地

1	scp -r linux1:/opt/software/ /opt/software/

 

 

然后安装

然后用mysqlsh搭建

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shell.connect(\'root@linux1:3306\') dba.configureLocalInstance() shell.connect(\'root@linux2:3306\') dba.configureLocalInstance() shell.connect(\'root@linux3:3306\') dba.configureLocalInstance()   shell.connect(\'root@linux1:3306\') var cluster=dba.createCluster("MySQL_Cluster")

　　

如果不想用root用户,建议用root用户

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set sql_log_bin=0; create user rpl_user@\'%\' identified by \'#Root_123456\'; grant replication slave,replication client on *.* to rpl_user@\'%\'; create user rpl_user@\'127.0.0.1\' identified by \'#Root_123456\'; grant replication slave,replication client on *.* to rpl_user@\'127.0.0.1\'; create user rpl_user@\'localhost\' identified by \'#Root_123456\'; grant replication slave,replication client on *.* to rpl_user@\'localhost\'; set sql_log_bin=1;   change master to         master_user=\'rpl_user\',         master_password=\'#Root_123456\'         for channel \'group_replication_recovery\';   install plugin group_replication soname \'group_replication.so\';   set global group_replication_bootstrap_group=on; start group_replication; set global group_replication_bootstrap_group=off;

　　关闭防火墙

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# 关闭防火墙 systemctl stop firewalld.service # 禁用防火墙 systemctl disable firewalld.service vi /etc/selinux/config SELINUX=disabled

　　

安装mysql-router

1	rpm -ivh mysql-router-community-8.0.20-1.el7.x86_64.rpm

1	vim /etc/mysqlrouter/mysqlrouter.conf

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[DEFAULT] logging_folder = /var/log/mysqlrouter runtime_folder = /var/run/mysqlrouter config_folder = /etc/mysqlrouter   [logger] level = INFO [routing:read_write] bind_address = 192.168.10.11 bind_port = 7001 mode = read-write destinations = linux1:3306,linux2:3306 protocol=classic max_connections=1024   [routing:read_only] bind_address = 192.168.10.11 bind_port = 7002 mode = read-only destinations = linux1:3306,linux2:3306 protocol=classic max_connections=1024 # If no plugin is configured which starts a service, keepalive # will make sure MySQL Router will not immediately exit. It is # safe to remove once Router is configured. [keepalive] interval = 60

　重启mysqlrouter

1	systemctl restart mysqlrouter