使用dockers安裝MySQL

事前准備

1. 關閉selinux

setenforce 0
vim /etc/sysconfig/selinux 
SELINUX=disabled

# 若不關閉，使用docker啟動mysql5.7鏡像容器時啟動不起來，查看日志會有如下錯誤顯示：
ERROR: mysqld failed while attempting to check config
command was: "mysqld --verbose --help"
mysqld: Can't read dir of '/etc/mysql/conf.d/' (Errcode: 13 - Permission denied)
mysqld: [ERROR] Fatal error in defaults handling. Program aborted!
ERROR: mysqld failed while attempting to check config
command was: "mysqld --verbose --help"
mysqld: Can't read dir of '/etc/mysql/conf.d/' (Errcode: 13 - Permission denied)
mysqld: [ERROR] Fatal error in defaults handling. Program aborted!

2. 安裝並啟動docker

yum install epel-release
yum -y install docker
systemctl start docker.service

3. 創建目錄

mkdir -p /datavol/mysql-200/{mysql,conf}

把該文件放到主庫所在配置文件路徑下：/datavol/mysql-200/conf

配置my.cnf

[client]
port = 3306
default-character-set = utf8mb4

[mysql]
port = 3306
default-character-set = utf8mb4

[mysqld]
##########################
# summary
##########################
#bind-address = 0.0.0.0
#port = 3306
#datadir=/datavol/mysql/data #數據存儲目錄

##########################
# log bin
##########################
server-id = 200				#必須唯一
log_bin = mysql-bin 		#開啟及設置二進制日志文件名稱
binlog_format = MIXED
sync_binlog = 1
expire_logs_days =7			#二進制日志自動刪除/過期的天數。默認值為0，表示不自動刪除。

#binlog_cache_size = 128m
#max_binlog_cache_size = 512m
#max_binlog_size = 256M

binlog-do-db = test 		#要同步的數據庫 

binlog-ignore-db = mysql 	#不需要同步的數據庫 
binlog_ignore_db = information_schema
binlog_ignore_db = performation_schema
binlog_ignore_db = sys
			

##########################
# character set
##########################
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci

安裝啟動主庫

[root@localhost ~]# docker run -d -p 4200:3306 --name=mysql-200 -v /datavol/mysql-200/conf:/etc/mysql/conf.d -v /datavol/mysql-200:/datavol/mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:5.7
5691bac538e646db00273e3cad5b350dbe6cce0bd176346b7eefd9a6f9e3a9ad
[root@localhost ~]# docker ps
CONTAINER ID        IMAGE                               COMMAND                  CREATED             STATUS              PORTS                                                NAMES
5691bac538e6        mysql:5.7                           "docker-entrypoint..."   44 seconds ago      Up 43 seconds       33060/tcp, 0.0.0.0:4200->3306/tcp                    mysql-200
[root@localhost ~]# docker exec -it mysql-200 /bin/bash
root@5691bac538e6:/# mysql -u root -p
Enter password: