如何单机部署多个 MySQL 8.0 实例 ?
在服务器资源有限的情况下，可利用该方案快速搭建各类 mysql 架构方案。各 MySQL 实例共享一个 mysqld 主程序，但各实例数据目录是独立的，存放在不同的文件夹中；好了、废话不多说，直接上干货，具体搭建步骤如下环境介绍
实例主机mysql portmysqlx portdatadirmysql1192.168.31.100330633060/var/lib/mysql1/mysql2192.168.31.100330733070/var/lib/mysql2/mysql3192.168.31.100330833080/var/lib/mysql3/部署 MySQL 主程序
1、通过官方二进制包解压安装
wget https://cdn.mysql.com/archives/mysql-8.0/mysql-8.0.30-el7-x86_64.tar.gz
tar xzf mysql-8.0.30-el7-x86_64.tar.gz
mv mysql-8.0.30-el7-x86_64 /usr/local/mysql
# vim /etc/profile 添加环境变量，执行 source /etc/profile 使配置在当前 shell 下生效
export PATH=$PATH:/usr/local/mysql/bin/
# 创建各 mysql 服务器实例的数据目录 datadir
useradd -r -M mysql -s /bin/false
mkdir -p /var/lib/mysql{1..3} && chown mysql.mysql /var/lib/mysql{1..3}修改 MySQL 实例配置
设置各 mysql 实例的配置文件
cat > /etc/my.cnf << EOF
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user = root
pass = root # 后续变更各 mysql 实例 root 账号的初始随机密码为简单密码 root，因为停止各 mysql 实例时需使用此密码
log = /var/log/mysql_multi.log
# mysql 实例一
server-id = 1
socket = /var/lib/mysql1/mysql.sock
port = 3306
bind_address = 0.0.0.0
datadir = /var/lib/mysql1
user = mysql
performance_schema = off
innodb_buffer_pool_size = 32M
skip_name_resolve = 1
log_error = error.log
pid-file = /var/lib/mysql1/mysql.pid
mysqlx = 1 # 设置 0 则禁用 mysqlx, 其默认监听端口 33060
mysqlx-port = 33060
# mysql 实例二
server-id = 2
socket = /var/lib/mysql2/mysql.sock
port = 3307
bind_address = 0.0.0.0
datadir = /var/lib/mysql2
user = mysql
performance_schema = off
innodb_buffer_pool_size = 32M
skip_name_resolve = 1
log_error = error.log
pid-file = /var/lib/mysql2/mysql.pid
mysqlx = 1
mysqlx-port = 33070
# mysql 实例三
server-id = 3
socket = /var/lib/mysql3/mysql.sock
port = 3308
bind_address = 0.0.0.0
datadir = /var/lib/mysql3
user = mysql
performance_schema = off
innodb_buffer_pool_size = 32M
skip_name_resolve = 1
log_error = error.log
pid-file = /var/lib/mysql3/mysql.pid
mysqlx = 1
mysqlx-port = 33080
EOF启动 mysql 实例
设置多实例启动程序
/usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/var/lib/mysql1
#> 2023-03-15T01:22:52.092218Z 0 /usr/local/mysql/bin/mysqld (mysqld 8.0.30) initializing of server in progress as process 15026
#> 2023-03-15T01:22:52.119703Z 1 InnoDB initialization has started.
#> 2023-03-15T01:22:55.237170Z 1 InnoDB initialization has ended.
#> 2023-03-15T01:23:00.616679Z 6 A temporary password is generated for root@localhost: lqYujqcue7*_
# 同理，初始化其它 mysql 实例（mysql2、mysql3）
/usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/var/lib/mysql2
/usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/var/lib/mysql3更新 root 账号密码
1、使用初始随机密码登录各 MySQL 实例
cp /usr/local/mysql/support-files/mysqld_multi.server /etc/init.d/mysqld_multid
chmod +x /etc/init.d/mysqld_multid
# 启动 各 mysql 实例
/etc/init.d/mysqld_multid start
chkconfig mysqld_multid on # 可选，设置开机启动
/etc/init.d/mysqld_multid report # 查看运行情况
#> Reporting MySQL servers
#> MySQL server from group: mysqld1 is running
#> MySQL server from group: mysqld2 is running
#> MySQL server from group: mysqld3 is running
netstat -ntlp | grep mysqld
#> Active Internet connections (only servers)
#> Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
#> tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 19867/mysqld
#> tcp 0 0 0.0.0.0:3307 0.0.0.0:* LISTEN 19869/mysqld
#> tcp 0 0 0.0.0.0:3308 0.0.0.0:* LISTEN 19876/mysqld
#> tcp6 0 0 :::33080 :::* LISTEN 19876/mysqld
#> tcp6 0 0 :::33060 :::* LISTEN 19867/mysqld
#> tcp6 0 0 :::33070 :::* LISTEN 19869/mysqld
# 停止 各 mysql 实例，需先更新 root 账号密码为 root，因为其实现原理是通过 mysqladmin 登录到各 mysql 实例执行 shutdown
/etc/init.d/mysqld_multid stop2、设置 MySQL root 账号为简单密码 root，且允许从任意主机访问数据库
mysql -u root -p -P3306 -S /var/lib/mysql1/mysql.sock
mysql -u root -p -P3307 -S /var/lib/mysql2/mysql.sock
mysql -u root -p -P3308 -S /var/lib/mysql3/mysql.sock参考
MySQL-5.7.x 二进制包，官方下载地址
来源:https://www.cnblogs.com/ywjsbang/p/17262761.html
免责声明：由于采集信息均来自互联网，如果侵犯了您的权益，请联系我们【E-Mail:cb@itdo.tech】 我们会及时删除侵权内容，谢谢合作！
页:
[1]