centos7安裝mysql5.7.24後配置主從
1)使用docker安裝完成mysql5.7.24，我規劃的是3臺：
192.168.0.170（Master）
192.168.0.169（Slave）
192.168.0.168（Slave）
2)配置三臺機器的my.cnf配置文件
我三臺機器的配置文件都是/usr/local/mysql/conf/my.cnf
3)設置三臺主從服務器配置
vi /usr/local/mysql/conf/my.cnf
[mysqld]
interactive_timeout = 120
wait_timeout = 120
max_allowed_packet = 32M
log-bin=mysql-bin
server-id=170
vi /usr/local/mysql/conf/my.cnf
[mysqld]
interactive_timeout = 120
wait_timeout = 120
max_allowed_packet = 32M
log-bin=mysql-bin
server-id=169
vi /usr/local/mysql/conf/my.cnf
[mysqld]
interactive_timeout = 120
wait_timeout = 120
max_allowed_packet = 32M
log-bin=mysql-bin
server-id=168
3)創建主從服務器容器
在170,169,168上運行啟動mysql
docker run --name mysql5_7_24 -p 3306:3306 -v /usr/local/mysql/conf:/etc/mysql/conf.d -v /usr/local/mysql/log:/var/log/mysql -v /usr/local/mysql/data:/var/lib/mysql --privileged=true -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7.24
docker run --name mysql5_7_24 -p 3306:3306 -v /usr/local/mysql/conf:/etc/mysql/conf.d -v /usr/local/mysql/log:/var/log/mysql -v /usr/local/mysql/data:/var/lib/mysql --privileged=true -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7.24
docker run --name mysql5_7_24 -p 3306:3306 -v /usr/local/mysql/conf:/etc/mysql/conf.d -v /usr/local/mysql/log:/var/log/mysql -v /usr/local/mysql/data:/var/lib/mysql --privileged=true -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7.24
4)登錄170主服務器的mysql，查詢master的狀態
170主庫創建用戶
SET sql_mode=(SELECT REPLACE(@@sql_mode,‘ONLY_FULL_GROUP_BY‘,‘‘));
GRANT REPLICATION SLAVE ON *.* to ‘backup‘@‘%‘ identified by ‘123456‘;
5)登錄169和168從服務器的mysql，設置與主服務器相關的配置參數
SET sql_mode=(SELECT REPLACE(@@sql_mode,‘ONLY_FULL_GROUP_BY‘,‘‘));
change master to master_host=‘192.168.0.170‘,master_user=‘backup‘,master_password=‘123456‘,master_log_file=‘mysql-bin.000001‘,master_log_pos=439;
master_host為docker的地址不能寫127.0.0.1
master_user是在主庫創建的用戶
master_log_pos是主庫show master status;查詢出的Position（439是最開始查詢出來的，和上面的截圖22437不同）
然後在169和168上啟動服務
start slave;
查看服務狀態
show slave status;
Waiting for master to send event 就是成功了
Connecting to master 多半是連接不通
之後主庫的修改都能同步到從庫了
centos7安裝mysql5.7.24後配置主從