CentOS7 mysql5.7安装并配置主主同步

安装前准备

localectl set-locale LANG=zh_CN.utf8

rpm -qa | grep mariadb
#卸载mariadb
rpm -e --nodeps $(rpm -qa | grep mariadb)
安装

#下载或上传离线安装包 mysql-5.7.31-1.el7.x86_64.rpm-bundle.tar
#下载地址https://dev.mysql.com/downloads/mysql/
wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.31-1.el7.x86_64.rpm-bundle.tar


mkdir -p /usr/local/src/mysql
tar -xvf mysql-5.7.31-1.el7.x86_64.rpm-bundle.tar -C /usr/local/src/mysql

cd /usr/local/src/mysql
rpm -ivh mysql-community-common-*
rpm -ivh mysql-community-libs-*
rpm -ivh mysql-community-devel-*
rpm -ivh mysql-community-embedded-*
rpm -ivh mysql-community-client-*
rpm -ivh mysql-community-server-*


systemctl status mysqld
systemctl start mysqld
systemctl enable mysqld

grep "password" /var/log/mysqld.log
#修改初始密码
/usr/bin/mysql_secure_installation

#如果mysqld.log中没有密码,请跳过密码登陆:
mysql -uroot --skip-password
#修改密码:
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'xiaoWEI0923!';

#用新密码登陆,并配置允许远程登陆
mysql -uroot -pxiaoWEI0923!
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'xiaoWEI0923!' WITH GRANT OPTION;
FLUSH PRIVILEGES;

配置主主复制

1.修改/etc/my.cnf并重启mysqld

#node118 /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

symbolic-links=0

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

server-id=1
log-bin=mysql-bin
expire_logs_days = 3

auto-increment-offset=2
auto-increment-increment=2
#node117 /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

symbolic-links=0

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

server-id=2
log-bin=mysql-bin
expire_logs_days = 3

auto-increment-offset=1
auto-increment-increment=2
2.设置同步

#两台机器上都执行
GRANT REPLICATION SLAVE ON *.* TO 'repuser'@'%'identified by 'xiaoWEI0923!';

show master status; 记录下File及Position值

#node117上执行(file和position为118上查询到的)
CHANGE MASTER TO MASTER_USER='repuser',MASTER_HOST='192.168.6.118',MASTER_PASSWORD='xiaoWEI0923!',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000003',MASTER_LOG_POS=154;

#node118上执行(file和position为117上查询到的)
CHANGE MASTER TO MASTER_USER='repuser',MASTER_HOST='192.168.6.117',MASTER_PASSWORD='xiaoWEI0923!',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000002',MASTER_LOG_POS=1290;

#配置完后分别执行
start slave ;

#检查状态,确保 Slave_IO_Running: Yes,Slave_SQL_Running: Yes
show slave status \G

end

附录1:配置用户登陆及权限相关操作

#1.允许root用户在任何地方登陆,且有所有权限
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'youpassword' WITH GRANT OPTION;
#2.只能在特定ip机器上登陆
GRANT ALL PRIVILEGES ON *.* TO root@"172.16.16.152" IDENTIFIED BY "youpassword" WITH GRANT OPTION;
#3.仅有部分权限
GRANT select,insert,update,delete ON *.* TO root@"172.16.16.152" IDENTIFIED BY "youpassword";
#4.收回权限
REVOKE all on TEST-DB from test-user;
#5.删除用户
DELETE FROM user WHERE user="test-user";

注意:所有授权相关操作后都需要刷新权限 FLUSH PRIVILEGES;

全局管理权限: 
FILE: 在MySQL服务器上读写文件。 
PROCESS: 显示或杀死属于其它用户的服务线程。 
RELOAD: 重载访问控制表,刷新日志等。 
SHUTDOWN: 关闭MySQL服务。
数据库/数据表/数据列权限: 
ALTER: 修改已存在的数据表(例如增加/删除列)和索引。 
CREATE: 建立新的数据库或数据表。 
DELETE: 删除表的记录。 
DROP: 删除数据表或数据库。 
INDEX: 建立或删除索引。 
INSERT: 增加表的记录。 
SELECT: 显示/搜索表的记录。 
UPDATE: 修改表中已存在的记录。
特别的权限: 
ALL: 允许做任何事(和root一样)。 
USAGE: 只允许登录--其它什么也不允许做。
附录2:设置同步问题处理

若设置完同步并启动slave后,检查状态时不都为Yes:
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
则同步设置未成功,请查看日志/var/log/mysqld.log中错误进行处理
1.server_id要不一致,配置后要重启:show variables like 'server_id';
2.server_uuid要不一致,配置后要重启:show variables like 'server_id';
如果发现配置已经修改了,但是log中提示有错,则重启MySQL后重新配置同步

 

posted @ 2020-08-05 15:41  肖哥哥  阅读(482)  评论(0编辑  收藏  举报
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