Example | Notion

https://hub.docker.com/_/wordpress

환경변수 설명 써져 있음
root@ubuntu:~# docker run -dit --name wp -e WORDPRESS_DB_NAME=wordpress wordpress
root@ubuntu:~# docker exec -it wp /bin/bash

root@bce1f57f0d65:/var/www/html# ls

root@bce1f57f0d65:/var/www/html# ls
index.php	 wp-blog-header.php    wp-content	  wp-login.php	    xmlrpc.php
license.txt	 wp-comments-post.php  wp-cron.php	  wp-mail.php
readme.html	 wp-config-docker.php  wp-includes	  **wp-settings.php**
wp-activate.php  wp-config-sample.php  wp-links-opml.php  wp-signup.php
wp-admin	 wp-config.php	       wp-load.php	  wp-trackback.php

root@ubuntu:~# docker rm -f wp

root@ubuntu:~# docker run -d --name db -e MYSQL_ROOT_PASSWORD=1234 -e MYSQL_DATABASE=wordpress -e MYSQL_USER=wpuser -e MYSQL_PASSWORD=1234 mariadb

root@ubuntu:~# docker run -d --name db -e MYSQL_ROOT_PASSWORD=1234 -e MYSQL_DATABASE=wordpress -e MYSQL_USER=wpuser -e MYSQL_PASSWORD=1234 mariadb
Unable to find image 'mariadb:latest' locally
latest: Pulling from library/mariadb
e96e057aae67: Pull complete 
13360dd5ccba: Pull complete 
dd5c4b73b925: Pull complete 
7f870965a3fa: Pull complete 
fd3f1ea3ff32: Pull complete 
a57a6862e470: Pull complete 
039ecd174df7: Pull complete 
cbb1c35b18de: Pull complete 
Digest: sha256:a98834606bea049d3094d0d90964eb749d9a10c46f60e58e67ca75a6a155c1ad
Status: Downloaded newer image for mariadb:latest
525162d34a07cbf9acf27c7bb21b23bc4cccf8330acc01ec59e01531ba116f2d

root@ubuntu:~# docker ps

root@ubuntu:~# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED             STATUS             PORTS                                   NAMES
525162d34a07   mariadb   "docker-entrypoint.s…"   19 seconds ago      Up 18 seconds      3306/tcp                                db
cd05b312e90a   my_cent   "/usr/sbin/httpd -D …"   About an hour ago   Up About an hour   0.0.0.0:5555->80/tcp, :::5555->80/tcp   my_cent

root@ubuntu:~# docker inspect db | grep IPAddr

root@ubuntu:~# docker inspect db | grep IPAddr
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.3",
"IPAddress": "172.17.0.3",

root@ubuntu:~# apt-get -y install mariadb-client
root@ubuntu:~# mysql -u wpuser -p1234 -h 172.17.0.3
root@ubuntu:~# docker run --name wp -dp 3232:80 -e WORDPRESS_DB_HOST=172.17.0.3 -e WORDPRESS_DB_USER=wpuser -e WORDPRESS_DB_PASSWORD=1234 -e WORDPRESS_DB_NAME=wordpress wordpress
브라우저 접속
- 와! 된다!
root@ubuntu:~# docker rm -f wp

동작 확인했으니까 삭제 ㄱㄱ
root@ubuntu:~# docker run --name wp -dp 3232:80 --link db:db -e WORDPRESS_DB_HOST=db -e WORDPRESS_DB_USER=wpuser -e WORDPRESS_DB_PASSWORD=1234 -e WORDPRESS_DB_NAME=wordpress wordpress
- --link db:db
  
  db라는 container를 db라는 이름으로 naming해서 접근한다는 의미. --link <CONATINER_NAME>:<ALIAS> 형식이다.
이게 되려면 당연히 db라는 MariaDB container가 구동되고 있어야 한다.

WORDPRESS_DB_HOST=172.17.0.3와 같이 지정하는 건 불편한 부분이 많다. IP 주소도 계속 바뀌고 하기 때문에 container 이름으로 찾을 수 있으면 좋을 것이다.
브라우저 접속

와! 또 된다!