一、docker快捷安装mysql5.7
1.docker启动之后,拉取mysql的镜像
docker pull mysql:5.7.21
2.初次运行镜像
docker run --name mysql.5.7.21 -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.7.21
--name 为设置容器的名字,我设置为mysql.5.7.21
-p 端口映射
-e 为设置执行时的环境变量,在这里我设置mysql的root密码,相关变量可参考官网
-d 为设置镜像,镜像名:版本
3.进入mysql的容器里
docker exec -it mysql_master
4.查看docker的启动情况
docker ps -a
5.用mysql工具就可以之间连接进去进行操作了
二、使用docker给mysql添加主从
1.拉取镜像
docker pull mysql:5.7.21
2.运行2个mysql镜像,分别命名mysql_master、mysql_slave
docker run --name mysql_master -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.7.21
docker run --name mysql_slave -p 3307:3306 -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.7.21
3.进入mysql_master进行相关主节点配置
docker exec -it mysql_master /bin/bash
查找mysql配置文件的位置
find / -name my.cnf 或 mysql --help | grep my.cnf
在/etc/mysql/my.cnf
vim /etc/mysql/ny.cnf
添加内容
[client]
port = 3306
socket = /var/lib/mysql/mysql.sock
[mysqld]
# Master node configuration 2 and slave node configuration 3, generally configured according to the Intranet IP
server-id = 2
port = 3306
datadir = /var/lib/mysql
socket = /var/lib/mysql/mysql.sock
default-storage-engine = InnoDB
log-bin = mysql-bin
log-bin-index = mysql-bin.index
relay-log = mysql-relay
relay-log-index = mysql-relay.index
expire-logs-days = 10
max-binlog-size = 100M
max_binlog_cache_size = 8M
log-slave-updates = 1
binlog_cache_size = 4M
# use MIXED binlog
binlog_format = MIXED
#binlog_format = ROW
#replicate-do-db = db%.%
#replicate-ignore-db = mysql.%
# ignore tables
replicate-wild-ignore-table = mysql.%
sync_binlog = 1
relay_log_recovery = 1
log_slave_updates = 1
skip-name-resolve
sql_mode=STRICT_TRANS_TABLES
[mysqldump]
quick
max_allowed_packet = 32M
修改完重启mysql_master容器或重启mysql
重启mysql:
service mysql restart
或重启容器:
docker start mysql_master
重启容器后进入mysql_master容器
docker exec -it mysql_master /bin/bash
登录mysql客户端,创建用户,授权,开启binlog
mysql -uroot -p123456
mysql> create user 'repl'@'%' identified by 'abcd_123';
mysql> grant replication slave on . to 'repl'@'%' identified by 'abcd_123';
mysql> flush privileges;
重启
service mysql restart
4.进入mysql_slave容器,连接mysql客户端
**在mysql_slave里配置和mysql_master一样的my.conf配置server-id改成3
改成和master status里显示的内容一致 Master_log_file 和 Master_log_pos
mysql> show master status;
mysql> stop slave;
mysql> Change master to Master_host='172.17.0.2', Master_user='repl', Master_password='abcd_123', Master_log_file='mysql-bin.000001', Master_log_pos=120;
mysql> start slave;
mysql> show slave status \G
当
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
表示操作成功
5.Slave_IO_Running:NO(解决方法)
改成和master status里显示的内容一致
mysql> show master status;
mysql> stop slave;
mysql> change master to Master_Log_File='mysql-bin.000002',Master_Log_Pos=154;
mysql> start slave;
mysql> show slave status \G;
注:
- 容器内容ip
172.17.0.2 是容器中mysql_master里的内网ip
172.17.0.3 是容器中mysql_slave里的内网ip - 镜像过度精简导致没有vim、ifconfig、ping命令处理方案:docker 镜像下安装Vim
安装vim
apt-get install -y vim
安装ifconfig
apt-get install net-tools
安装ping命令
apt-get install iputils-ping - Docker容器互访三种方式