Adjusting docker compose file to move the data directory on a different drive

ℹ️ Support
,
1

I am using the following docker compose file to install Nextcloud. I want to install Nextcloud on the SSD but have the /data folder on my spinning SSD /dev/sdb but i am not sure on how to properly adjust this.

So far I got this:

services:
  # Note: PostgreSQL is an external service. You can find more information about the configuration here:
  # https://hub.docker.com/_/postgres
  db:
    # Note: Check the recommend version here: https://docs.nextcloud.com/server/latest/admin_manual/installation/system_requirements.html#server
    image: postgres:alpine
    restart: always
    volumes:
      - db:/var/lib/postgresql/data:Z
    env_file:
      - db.env

  # Note: Redis is an external service. You can find more information about the configuration here:
  # https://hub.docker.com/_/redis
  redis:
    image: redis:alpine
    restart: always

  app:
    image: nextcloud:fpm-alpine
    restart: always
    volumes:
      - nextcloud:/var/www/html:z
      # NOTE: The `volumes` config of the `cron` and `app` containers must match
    environment:
      - POSTGRES_HOST=db
      - REDIS_HOST=redis
    env_file:
      - db.env
    depends_on:
      - db
      - redis

  # Note: Nginx is an external service. You can find more information about the configuration here:
  # https://hub.docker.com/_/nginx/
  web:
    image: nginx:alpine-slim
    restart: always
    ports:
      - 127.0.0.1:8080:80
    volumes:
      # https://docs.nextcloud.com/server/latest/admin_manual/installation/nginx.html
      - ./web/nginx.conf:/etc/nginx/nginx.conf:ro  
      # NOTE: The `volumes` included below should match those of the `app` container (unless you know what you're doing)
      - nextcloud:/var/www/html:z,ro
    depends_on:
      - app

  cron:
    image: nextcloud:fpm-alpine
    restart: always
    volumes:
      - nextcloud:/var/www/html:z
      # NOTE: The `volumes` config of the `cron` and `app` containers must match
    entrypoint: /cron.sh
    depends_on:
      - db
      - redis

volumes:
  db:
  nextcloud:

How do I properly set just the /data folder to be on /dev/sdb?

2

How do I properly set just the /data folder to be on /dev/sdb?

Partition and mount sdb at the host level in the standard Linux fashion (see your distribution docs if necessary).

Then wherever you’ve mounted at the host level goes here:

    volumes:
      - nextcloud:/var/www/html:z
      - /path/on/host:/var/www/html
      # NOTE: The `volumes` config of the `cron` and `app` containers must match

Don’t overlook also adjusting it on your Cron container too.

3

would this move the entire installation of nextcloud over to the /dev/sdb? or can I just have the hosted data that is synced across devices on the spinning drive and the underlying PHP files and all that on the SSD?

4

Just the default datadirectory. So just user/app data files.

P.S. You may find the Persistent data section of that image’s documentation of interest.

5

@jtr I am having some issues here:

Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting “/home/throwdating2024/pw_cloud/web/nginx.conf” to rootfs at “/etc/nginx/nginx.conf”: create mountpoint for /etc/nginx/nginx.conf mount: cannot create subdirectories in “/var/lib/docker/overlay2/67f02868677c111ef49977bfa999bf0d5219bff78df08a33abd0854bdfffe0bf/merged/etc/nginx/nginx.conf”: not a directory: unknown: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type

this is my docker-compose.yml file:

services:
  # Note: PostgreSQL is an external service. You can find more information about the configuration here:
  # https://hub.docker.com/_/postgres
  db:
    # Note: Check the recommend version here: https://docs.nextcloud.com/server/latest/admin_manual/installation/system_requirements.html#server
    image: postgres:alpine
    container_name: pw_cloud_db
    restart: always
    volumes:
      - db:/var/lib/postgresql/data:Z
    env_file:
      - db.env

  # Note: Redis is an external service. You can find more information about the configuration here:
  # https://hub.docker.com/_/redis
  redis:
    image: redis:alpine
    container_name: pw_cloud_redis
    restart: always

  app:
    image: nextcloud:fpm-alpine
    container_name: pw_cloud_main
    restart: always
    volumes:
      - /media/cloud_drive:/var/www/html
      # NOTE: The `volumes` config of the `cron` and `app` containers must match
    environment:
      - POSTGRES_HOST=db
      - REDIS_HOST=redis
    env_file:
      - db.env
    depends_on:
      - db
      - redis

  # Note: Nginx is an external service. You can find more information about the configuration here:
  # https://hub.docker.com/_/nginx/
  web:
    image: nginx:alpine-slim
    container_name: pw_cloud_nginx
    restart: always
    ports:
      - 127.0.0.1:8080:80
    volumes:
      # https://docs.nextcloud.com/server/latest/admin_manual/installation/nginx.html
      - ./web/nginx.conf:/etc/nginx/nginx.conf:ro  
      # NOTE: The `volumes` included below should match those of the `app` container (unless you know what you're doing)
      - /media/cloud_drive:/var/www/html
    depends_on:
      - app

  cron:
    image: nextcloud:fpm-alpine
    container_name: pw_cloud_cron
    restart: always
    volumes:
      - nextcloud:/var/www/html:z
      # NOTE: The `volumes` config of the `cron` and `app` containers must match
    entrypoint: /cron.sh
    depends_on:
      - db
      - redis

volumes:
  db:
  nextcloud:

not sure what i am doing wrong here.