目录
1.MaxScale 是干什么的?
2.MaxScale 实验环境
3.实现数据库主从复制
4.创建用户
1) 创建监控用户
2) 创建路由用户
5.docker 安装MaxScale
6.配置maxscale
使用 maxctrl list servers 命令查看运行状态
查看注册服务
使用 maxctrl list listeners Read-Write-Service 命令查看服务监听状态信息
1.MaxScale 是干什么的?
MaxScale是maridb开发的一个mysql数据中间件,其配置简单,能够实现读写分离,并且可以根据主从状态实现写库的自动切换,对多个从服务器能实现负载均衡。
2.MaxScale 实验环境
中间件 | 192.168.20.150 | MaxScale 22.08.4 |
---|---|---|
主服务器 | 192.168.20.149 | mysql 8.0.30 |
从服务器 | 192.168.20.148 | mysql 8.0.30 |
从服务器 | 192.168.150.146 | mysql 8.0.30 |
3.实现数据库主从复制
分别在三台服务器的/etc/my.cnf.d/mysql-server.cnf添加:
server_id=149 / 148 /146 (这个不要相同,下面两个可以相同)
gtid_mode=ON
enforce-gtid-consistency=ON
两个从服务器的/etc/my.cnf.d/mysql-server.cnf添加
read_only=1
在主服务器添加用户
create user 'rep'@'192.168.20.%' identified with mysql_native_password by '123456';
--用户授权 “同步复制”、“同步复制状态”
grant replication slave on *.* to 'rep'@'192.168.150.%';
--配置主从同步
CHANGE MASTER TO
MASTER_HOST = '192.168.20.149',
MASTER_USER = 'rep',
MASTER_PASSWORD = '123456',
MASTER_AUTO_POSITION = 1;
--启动主从同步
start slave
双yes就是成功(两个从服务器都要求)
4.创建用户
需要在
master
中为 MaxScale 创建两个用户,用于监控模块和路由模块,已经实现主从复制的前提下,主库创建的用户,能同步到从库上
1) 创建监控用户
--创建用户
create user 'maxscale_monitor'@'192.168.20.%' identified with mysql_native_password by 'Admin@123456';
--用户授权 “同步复制”、“同步复制状态”
grant replication slave, replication client on *.* to maxscale_monitor@'192.168.20.%';
2) 创建路由用户
--创建用户
create user 'maxscale_route'@'192.168.20.%' identified with mysql_native_password by 'Admin@123456';
--用户授权
GRANT SHOW DATABASES ON *.* TO maxscale_route@'192.168.20.%';
GRANT SELECT ON mysql.user TO maxscale_route@'192.168.20.%';
GRANT SELECT ON mysql.db TO maxscale_route@'192.168.20.%';
GRANT SELECT ON mysql.tables_priv TO maxscale_route@'192.168.20.%';
GRANT SELECT ON mysql.columns_priv TO maxscale_route@'192.168.20.%';
GRANT SELECT ON mysql.proxies_priv TO maxscale_route@'192.168.20.%';
5.docker 安装MaxScale
先安装docker,然后启动容器实例
[root@openEuler-node3 ~]# yum install docker -y
[root@openEuler-node3 ~]# systemctl enable --now docker
[root@openEuler-node3 ~]# docker run -d --name mxs -p 8989:8989 -p 3306:3306 -v /data/maxscale/maxscale.cnf:/etc/maxscale.cnf.d mariadb/maxscale:latest
Unable to find image 'mariadb/maxscale:latest' locally
latest: Pulling from mariadb/maxscale
7ecefaa6bd84: Pull complete
ca0e00deb174: Pull complete
a477bc0ba89b: Pull complete
1197a5109a4f: Pull complete
07a9436e0cbc: Pull complete
ea7a1629d291: Pull complete
22d7399fd0e3: Pull complete
9de24e307d1e: Pull complete
4b69deb551d5: Pull complete
099ea1430764: Pull complete
ebc519f0dc79: Pull complete
Digest: sha256:5c658141992f1b83580759137bbe1b881ebe73e07c85819e46a8a14f332ff690
Status: Downloaded newer image for mariadb/maxscale:latest
832d4689e6c5f9333d089ef2fa39a6c498b10d8da7a1c414e45cb4e0db8bf9ba
[root@openEuler-node3 ~]#
[root@openEuler-node3 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
832d4689e6c5 mariadb/maxscale:latest "/usr/bin/tini -- do…" About a minute ago Up About a minute 0.0.0.0:3306->3306/tcp, 0.0.0.0:8989->8989/tcp mxs
[root@openEuler-node3 ~]# docker exec -it mxs bash
[root@832d4689e6c5 /]# maxscale -version
MaxScale 23.08.4
我们看到版本信息
6.配置maxscale
在,/etc/maxscale.cnf.d新建一个配置my.cnf或者直接修改/etc/maxscale.cnf文件
[root@832d4689e6c5 /]# cat /etc/maxscale.cnf.d/my.cnf
[maxscale]
threads=auto
[dbserv1]
type=server
address=192.168.20.149
port=3306
protocol=MariaDBBackend
[dbserv2]
type=server
address=192.168.20.148
port=3306
protocol=MariaDBBackend
[dbserv3]
type=server
address=192.168.20.146
port=3306
protocol=MariaDBBackend
[MySQL-Monitor]
type=monitor
module=mariadbmon
servers=dbserv1, dbserv2, dbserv3
user=maxscale_monitor
password=Admin@123456
monitor_interval=2s
[Read-Write-Service]
type=service
router=readwritesplit
servers=dbserv1,dbserv2,dbserv3
user=maxscale_route
password=Admin@123456
enable_root_user=true
[Read-Write-Listener]
type=listener
service=Read-Write-Service
protocol=MariaDBClient
address=0.0.0.0
port=3306
配置完成后重启docker、MaxScale服务:
[root@4e2804021a7d /]# maxscale -f /etc/maxscale.cnf.d/my.cnf -U maxscale
使用 maxctrl list servers 命令查看运行状态
查看注册服务
使用 maxctrl list listeners Read-Write-Service 命令查看服务监听状态信息
到这里服务已经完成了,测试内容我有时间分享,思路可以是:
在master主机授权测试用户
客户端client访问读写分离服务器
master主机验证查看数据
slave主机验证查看数据
slave主机插入数据,主服务器不会同步;
使用client客户端访问验证,能看到slave插入的数据,代表查询操作是slave主机提供服务;