WordPress in Docker-compose with nginx-proxy

Here is a docker-compose file for a WordPress install in docker-compose with a nginx-proxy reverse proxy in front.

Optionally you can run Watchtower to keep the DB up to date, but WordPress installs are NOT managed by the container once the volume is created. Updating the WP container only updates the PHP version basically (In this example, the proxy docker-compose file hosts Watchtower)

The data persists to host mounted volumes (./wordpress and ./db, for WP and the database respectively).

Also create a network called "global" so the WP container can communicate with the proxy

wp/docker-compose.yaml

YML

version: '3.9'
services:
  wordpress:
    image: wordpress:latest
    restart: unless-stopped
    expose:
      - 80
    environment:
      WORDPRESS_DB_HOST: db
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: wordpress
      WORDPRESS_DB_NAME: wordpress
      VIRTUAL_HOST: mydomain.com,www.mydomain.com
      VIRTUAL_PORT: 80
      LETSENCRYPT_HOST: mydomain.com,www.mydomain.com
    volumes:
      - ./wordpress:/var/www/html
    networks:
      - default
      - global

  db:
    image: mariadb:latest
    restart: unless-stopped
    environment:
      MARIADB_DATABASE: wordpress
      MARIADB_USER: wordpress
      MARIADB_PASSWORD: wordpress
      MARIADB_RANDOM_ROOT_PASSWORD: 1
    volumes:
      - ./db:/var/lib/mysql

networks:
  global:
    external: true

proxy/docker-compose.yaml

YML

version: "3.9"
services:
  watchtower:
    image: containrrr/watchtower
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    command: --interval 30 --cleanup

  proxy:
    image: nginxproxy/nginx-proxy:latest
    restart: unless-stopped
    ports:
      - 80:80
      - 443:443
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - ./certs:/etc/nginx/certs
      - vhost:/etc/nginx/vhost.d
      - html:/usr/share/nginx/html
    environment:
      - ENABLE_IPV6=true
      - HSTS=off
    networks:
      - default
      - global

  letsencrypt:
    image: nginxproxy/acme-companion:latest
    restart: unless-stopped
    volumes_from:
      - proxy
    depends_on:
      - proxy
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - /root/.docker/config.json:/config.json
    environment:
      - DEFAULT_EMAIL=admin@unixfy.net

volumes:
  vhost:
  html:

networks:
  global:
    external: true

Migration

You can just copy all of WordPress's files to the ./wordpress directory mounted into the WP container. (easy way to do this is zip up all the files on the old host, move the zipfile into the webroot, and do curl http://yourdomain.com/file.zip --resolve yourdomain.com:443:1.2.3.4 -o backup.zip where 1.2.3.4 is the IP of the old server)

The DB is a little more complicated - dump the DB on the origin server to a .sql file. Then it can be imported into the MariaDB docker container using the following command:

BASH

docker exec -i mariadb_container_name mysql -uwordpress -pwordpress wordpress< ./dump.sql

Permission problems

You need to chown the entire ./wordpress folder to www-data to make sure WP can write to it:

BASH

chown -R www-data:www-data wordpress/