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Joined 2 years ago
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Cake day: December 29th, 2023

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  • This question is usually asked a lot.

    This started as a project to prove that you could check for updates without first pulling every new image to compare against, while that’s not why it kept get getting traction my original answer to this question still seems true:

    From Watchtower Docs - Arguments

    Due to Docker API limitations the latest image will still be pulled from the registry.

    And:

    Do not pull new images. When this flag is specified, watchtower will not attempt to pull new images from the registry. Instead it will only monitor the local image cache for changes

    It’s also a different approach. With dockcheck you’d run it and then make the choice what you’ll update there and then. Selectively choosing exactly what containers to update at the moment. Or have it completely unattended auto update a selection of images.

    With the notifications, you can get notified and then have a sitdown and auto-update what you choose.

    It’s just different workflows and options.

    The upcoming release will also add a new option to backup the image being updated and then autoprune old backups after N days. To allow for easy rollback if a new image breaks.














  • Thank you!

    I sadly don’t have too much insights in the other alternatives, I try to not compare too much - maybe I should study them a bit more to understand the wider picture. There’s a few more I forgot to mention; renovate and dependabot.

    While I think all those tools are great and have functionality that my project cant fulfill - I strive to keep dockcheck simple and lightweight. Options and functionality have been bolted on bit by bit while still trying to have it as simple as possible in its core functions - so a user could just download the main script dockcheck.sh and run it to list updates and optionally update. Everything else is optional, extras.

    I guess it depends on what you’re looking for. If you’d like a GUI or more in depth setup or reporting - I’d look elsewhere, but if you’d like simplicity and maybe schedule it to notify you when there’s updates available - my project may be the thing.

    So my answer would be yes: if you’re running docker compose this project is very newbie friendly and easy to get going!