Overlay2 is no longer installed in Docker by default (because it's deprecated)

[pfaffman (Jay Pfaffman)]

Following up on Overlayfs to Overlay2, Failed on Fresh Installation, storage driver

I whined over on

Overlay2 not enabled by default with get.docker.com on Ubuntu LTS. 24.04

And it seems that overlay2 is not installed anymore:

@meyay

This is no accident:

• As of Docker Engine v29, the containerd image store becomes the default for image layer and content management for new installs.
• Legacy graph drivers are still available, but are now deprecated. New installs can still opt out of Containerd image store if there is any issue.

So I guess either Discourse needs to move to a new image thingy?

[sam (Sam Saffron)]

wasn’t this resolved here?

Overlayfs to Overlay2, Failed on Fresh Installation, storage driver

so then from what I’m understanding, we just need to also look for and include overlayfs? PR for that here:

[pfaffman (Jay Pfaffman)]

Yes! I started a new topic, since the other one had been closed, I think, but this one didn’t get picked up.

[mcmcclur (Mark McClure)]

@sam

wasn’t this resolved here?

Well, it’s not really resolved just yet, right? I set up a new Discourse instance today and found that I had to create a new file:
/etc/docker/daemon.json
with the contents

{
  "storage-driver": "overlay2"
}

So, that’s the temporary fix from the maintainer’s perspective. I’m glad to hear that the problem should go away within the next release or two.

[pfaffman (Jay Pfaffman)]

@mcmcclur

I set up a new Discourse instance today and found that I had to create a new file

When? This just got merged. About 3 hours ago.

FIX: allow overlayfs storage driver

[mcmcclur (Mark McClure)]

@pfaffman

When? This just got merged. About 3 hours ago.

My DigitalOcean history says I set it up 11 hours ago, or about 10:30 AM EST. I guess I got lucky!

I had updated the discourse-math plugin and was trying to figure out how to install it into my production Discourse. I didn’t want to mess up the instance that I actually use so I set up another.

Discourse Math

@sam and all interested in typing math in Discourse. I’ve updated the discourse-math plugin so that it uses MathJax V3, rather than the much slower and very outdated V2. As expected, the result is a much snappier user experience, while still maintaining the feature rich environment as compared to KaTeX. I’d love to issue a pull request, if you think the results look good. You can see it in action on my class Discourse site: Most of the content on that site is private or unlisted. There sho…