Synology on Rails Part VI: An Improved Docker Registry

After a few months of pushing container images to my home grown registry, I was noticing that my server was filling up. I wasn’t worried about running out of space soon, but what about a few months from now?

There are a handful of UI projects out there that run on top of the Docker Registry and provide UI to allow management of old images, retention policies, etc. Just what I needed.

I looked into deploying a few of them and ran into various complexities. Did I have all the dependencies? I think it’s running? But I’m getting errors. I was ready to throw up my hands.

A New Project has Entered the Chat

I found a project that unified the default Docker Registry image and the Registry UI project from Quiq into one docker-compose.yml. This looked promising.

My only concern was that the last commit was 4 years ago. And then I couldn’t get it all running correctly in the latest Synology DSM, version 7.x. I lost about a half of a day figuring out what was wrong.

A DSM 7.x Solution

But after that work, I was able to bring this project up-to-date in a fork. The README has more detailed instructions. Check it out!

The full details are in the README, but from a high level:

• One Container Manager Project that downloads and boots both the Registry and the UI in their own containers
• A small workaround (an extra reverse proxy) due to a Web Station limitation
• All the management is done through the Container Manager UI (just like your apps you’ve been pushing)

I’ve submitted a PR to the original project, but given the age, I’ll keep an eye on my fork for feedback.