nextcloud-preview-cron

Nextcloud Preview Generator Cron

This Docker image registers a cronjob to trigger preview generation for Nextcloud. The service should be added to an existing Nextcloud stack.

Note: In order to work the Nextcloud instance needs to have the Preview Generator app installed. Follow their initial setup guide before activating this service.

Build Arguments

Default

• NEXTCLOUD_VERSION=latest
• CRON_EXPRESSION="*/10 * * * *"

If you want a different Nextcloud base image version you can do so by providing the build argument NEXTCLOUD_VERSION. The cron expression is also customizable. Provide your own by setting it though the CRON_EXPRESSION build argument.

Be aware that you cannot change such variables during container startup, only while you're building the image. So you need to build your own version to achieve the customizations mentioned above.

Deployment

Make sure you mount the Nextcloud base directory at the same location as your Nextcloud service does.

version: '3'

services:
  database:
    image: postgres
    [...]

  nextcloud:
    image: nextcloud
    depends_on:
      - database
    volumes:
      - nextcloud:/var/www/html
    [...]

  preview:
    image: vinado/nextcloud-preview-cron:24
    depends_on:
      - nextcloud
    volumes:
      - nextcloud:/var/www/html:ro

volumes:
  nextcloud:
    driver: local

Contribute

The source is available on GitHub. Please report any issues.

To build the image from the Dockerfile run:

docker build -t vinado/nextcloud-preview-cron:latest .

# Or for a different base image version or cron expression
docker build \
 --build-arg NEXTCLOUD_VERSION=24 \
 --build-arg CRON_EXPRESSION="*/15 * * * *" \
 -t vinado/nextcloud-preview-cron:24 .