mysql多实例部署

千家信息网最后更新 2025年11月10日mysql多实例部署1.修改my.cnf
[mysql]
[mysqld_multi] mysqld = /usr/local/mysql/bin/mysqld_safe mysqladmin = /usr/local/mysql/bin/mysqladmin user = password =
[mysqld1] #explicit_defaults_for_timestamp=true port = 3306 skip-name-resolve server_id=1 datadir=/data/master max_connections=3000 slow-query-log=on ##开启慢查询 slow-query-log-file=/var/log/mysql1/mysql-slow-queries.log long_query_time=3 ##开启二进制文件 log-bin=/data/master_binlog/mysql1_bin.log log-bin-index=/data/master_binlog/binlog.index binlog-do-db=ibuy innodb_buffer_pool_size=2G #缓存 innodb_log_file_size = 512M innodb_log_files_in_group = 3 innodb_additional_mem_pool_size = 64M socket=/var/lib/mysql/mysql3306.sock pid-file=/data/master/mysql.pid #query_cache_size = 128M #查询缓存，合适查操作比较多的数据库 symbolic-links=0 sql_mode=STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION log-error=/var/log/mysql1/mysqld.log user=mysql



[mysqld2] port=3307 server_id=2 explicit_defaults_for_timestamp=true skip-name-resolve datadir=/data/slave max_connections=3000 slow-query-log=on ##开启慢查询 slow-query-log-file=/var/log/mysql2/mysql-slow-queries.log long_query_time=3 log-bin=/data/slave_binlog/mysql_bin.log ##开启二进制文件 log-bin-index=/data/slave_binlog/binlog.index binlog-do-db=ibuy innodb_buffer_pool_size=3G #缓存 innodb_log_file_size = 512M innodb_log_files_in_group = 3 innodb_additional_mem_pool_size = 64M socket=/var/lib/mysql/mysql3307.sock pid-file=/data/slave/mysql.pid #query_cache_size =512M #查询缓存，合适查操作比较多的数据库 symbolic-links=0 sql_mode=STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION log-error=/var/log/mysql2/mysqld.log user=mysql
[mysqld_safe] #max_allowed_packet=20480 #log-error=/var/log/mysql/mysqld.log #pid-file=/var/run/mysqld/mysqld.pid
2.创建数据目录

1. mkdir -p /data/master
2. mkdir -p /data/slave
3. mkdir -p /data/master_binlog
4. mkdir -p /data/slave_binlog
5. mkdir /var/log/mysql1
6. mkdir /var/log/mysql2
7. chown mysql.mysql /data/master -R
8. chown mysql.mysql /data/slave -R
9. chmod 777 /var/log/mysql1
10. chmod 777 /var/log/mysql2
11. chmod 777 /var/lib/mysql

3.初始化DB

/usr/local/mysql/scripts/mysql_install_db --datadir=/data/master 

/usr/local/mysql/scripts/mysql_install_db --datadir=/data/slave 

4. 安装工具 

1. cp /usr/local/mysql/bin/my_print_defaults /usr/bin/
2. cp /usr/local/mysql/bin/mysqld_multi /usr/bin

5.修改环境变量 #vim /etc/profile PATH=$PATH:/usr/local/mysql/bin export PATH

1.mysql启动

1. mysqld_multi start 1 启动实例1
2. mysqld_multi start 1-2 启动实例1,2

2.命令行登陆

1. mysql -u your_user -p your_password -P3307 -S /tmp/mysql3307.sock

                                                        由于涉及权限问题，mysqld_multi不能控制关闭mysql多实例，自己写了个关闭脚本                                                                                                        #!/bin/bash                                                                                                                user=""                                                        password=""                                                        read -p "Please input mysqld ID 1-2:" ID                                                        if [ "$ID" == "1" ]; then                                                        #read -p "Please input mysqld port number 3306-3307:" port                                                        /usr/local/mysql/bin/mysqladmin -u$user -p$password -S /var/lib/mysql/mysql3306.sock shutdown && echo "close mysqld master successful"                                                        elif [ "$ID" == "2" ]; then                                                        /usr/local/mysql/bin/mysqladmin -u$user -p$password -S /var/lib/mysql/mysql3307.sock shutdown && echo "close mysqld slave successful"                                                        else                                                        echo "Please input mysqld ID 1-2:"                                                        fi