docker-comepose编排工具部署mysql和wordpress

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WordPress:

1. Create a new directory in your home folder called my_wordpress and cd into it:

# mkdir wordpress
# cd /wordpress
    
2. Create a file named docker-compose.yml in this folder and add the following contents. Set your own passwords for the WORDPRESS_DB_PASSWORD, MYSQL_ROOT_PASSWORD, and MYSQL_PASSWORD environment options. The password entered for WORDPRESS_DB_PASSWORD and MYSQL_PASSWORD should be the same.  

[root@localhost wordpress]# vim docker-compose.yml

复制以下内容，粘贴前必须关闭自动缩进

version: '3.3'

services:
   wordpress:
     depends_on:
       - db
     image: wordpress:latest
     volumes:
       - wordpress_files:/var/www/html
     ports:
       - "8000:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_NAME: wpdb
       WORDPRESS_DB_USER: wpuser
       WORDPRESS_DB_PASSWORD: wppass

   db:
     image: mysql:5.7
     volumes:
       - db_data:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: luhao123
       MYSQL_DATABASE: wpdb
       MYSQL_USER: wpuser
       MYSQL_PASSWORD: wppass
volumes:
    wordpress_files:
    db_data: 
     
    
    
3. 必须在该文件夹中启动
[root@localhost wordpress]#yum install -y docker-compose
[root@localhost wordpress]#systemctl start docker
[root@localhost wordpress]# docker pull wordpress:latest
[root@localhost wordpress]# docker pull mysql:5.7
[root@localhost wordpress]# docker-compose up -d

可能出现报错1

ERROR: Couldn't connect to Docker daemon at http+docker://localhost - is it running?

If it's at a non-standard location, specify the URL with the DOCKER_HOST environment variable.
解决办法：

[root@] groupadd docker #创建docker组。
[root@] usermod -aG docker $(whoami) #将用户添加到docker组。
[root@] service docker restart   # 重启docker
4. The Docker containers will take a minute or two to start up WordPress and MySQL. Afterwards, you can visit your IP address in your web browser and you should be directed to the WordPress setup form.

[root@localhost wordpress]# iptables -t nat -vnL
可以看到8000端口为DNAT，ifconfig查看172地址，后面加:8000粘贴到浏览器
打开网页的8000端口即可看到wordpress已经部署好了