Wiki.js Update Companion

This docker image provides automated upgrade to latest Wiki.js versions from the Administration Area.

It's part of the DigitalOcean prebuilt Wiki.js droplet and is installed when following the Ubuntu installation instructions.

Usage

When a new version of Wiki.js is available, go the System page in the Administration Area of your Wiki.js installation.

Simply click the Perform Upgrade button to perform the upgrade.

Technical Reference

The wiki-update-companion container exposes a small HTTP API to the Wiki.js container (and only the container, not to the host).

By sending a POST request to http://wiki-update-companion/upgrade, the following actions are taken:

1. Stop and remove the wiki container
2. Pull the latest wiki image
3. Recreate the wiki container using the same settings as the previous container

The major version to use for the upgrade can be specified by adding it to the URL, e.g.:

http://wiki-update-companion/upgrade/3

The default is 2 if not provided.

For security reasons, this mechanism is not part of the main Wiki.js docker image, because it would require the Docker socket to be mapped into the container. A compromised Wiki.js instance would effectively give full access to other containers on the host. By using a separate isolated container, which only exposes a single HTTP endpoint internally, this potential security risk is eliminated.

The wiki-update-companion container must:

• Have the hostname wiki-update-companion
• Be on the same network as the wiki container
• Have the host /var/run/docker.sock socket mapped to the container in the same location