我在一个Docker容器中运行着一个Wordpress实例。我的问题来自于我的自定义主题文件夹——每次WordPress自动更新时，它都会把该文件夹清空。

我的docker-compose.yml配置如下

version: '3.8'

services:
  db:
    image: mariadb:latest
    container_name: seaf_db
    restart: unless-stopped
    environment:
      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
      MYSQL_DATABASE: ${DB_NAME}
      MYSQL_USER: ${DB_USER}
      MYSQL_PASSWORD: ${DB_PASSWORD}
    volumes:
      - db_seaf_data:/var/lib/mysql
    networks:
      - seaf-backend-wrwmqu

  wordpress:
    depends_on:
      - db
    build:
      context: .
      dockerfile: Dockerfile
    container_name: seaf_wp
    restart: unless-stopped
    environment:
      WORDPRESS_DB_HOST: db:3306
      WORDPRESS_DB_NAME: ${DB_NAME}
      WORDPRESS_DB_USER: ${DB_USER}
      WORDPRESS_DB_PASSWORD: ${DB_PASSWORD}
      CACHE_API_URL: ${CACHE_API_URL}
      CACHE_API_URL_GLOBAL: ${CACHE_API_URL_GLOBAL}
      CACHE_API_TOKEN: ${CACHE_API_TOKEN}
      WORDPRESS_CONFIG_EXTRA: |
        define('WP_MEMORY_LIMIT', '512M');
        define('WP_ENVIRONMENT_TYPE', 'production');
        define('CACHE_API_URL', $_ENV['CACHE_API_URL'] ?? $_SERVER['CACHE_API_URL'] ?? '');
        define('CACHE_API_TOKEN', $_ENV['CACHE_API_TOKEN'] ?? $_SERVER['CACHE_API_TOKEN'] ?? '');
    volumes:
      - ./uploads.ini:/usr/local/etc/php/conf.d/uploads.ini
      - ./.htaccess:/var/www/html/.htaccess
      # persistant volume for uploads and plugins
      - wp_content_seaf_data:/var/www/html/wp-content
      # custom theme -- tried to remove it and only keep the COPY from Dockerfile to no avail
      - ./custom-theme:/var/www/html/wp-content/themes/custom-theme:ro
    ports:
      - 80
    networks:
      - seaf-backend-wrwmqu

volumes:
  db_seaf_data:
  wp_content_seaf_data:


networks:
  seaf-backend-wrwmqu:
    external: true

我的Dockerfile ：

FROM wordpress:latest

RUN a2enmod rewrite headers

COPY uploads.ini /usr/local/etc/php/conf.d/uploads.ini

COPY ./custom-theme /var/www/html/wp-content/themes/custom-theme

How can I keep my named volume for upload and plugins while not having my custom theme get emptied when WP updates itself automatically ?

解决方案

挂载在 /var/www/html/wp-content 的卷 wp_content_seaf_data 会覆盖镜像拷贝到那里的一切内容，包括自定义主题。WordPress更新后会修改卷中的内容。

Replace:

- wp_content_seaf_data:/var/www/html/wp-content

With:

- wp_uploads:/var/www/html/wp-content/uploads
- wp_plugins:/var/www/html/wp-content/plugins

Keep the theme either:

COPY ./custom-theme /var/www/html/wp-content/themes/custom-theme

or

- ./custom-theme:/var/www/html/wp-content/themes/custom-theme:ro