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A Nomad job example setup for Lemmy (github.com)

submitted 1 year ago by nico@r.dcotta.eu to c/selfhosted@lemmy.world

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I am selfhosting Lemmy on a home Nomad cluster - I wrote the job files from scratch because I did not find anybody else who attempted the same.

I thought I'd share them and maybe they will serve as a starting point for someone using a similar selfhosted infra!

Nomad brings a few benefits from Lemmy specifically over Ansible/Docker, most notably some horizontal scaling across more than one machine.

Feedback welcome!

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[–] johntash@eviltoast.org 1 points 1 year ago (1 children)

I'm also using nomad to run Lemmy, glad to see someone else is too! I did create separate jobs for each component though, and am using Traefik instead of nginx.

What are you using for storage in your nomad cluster?

[–] nico@r.dcotta.eu 2 points 1 year ago* (last edited 1 year ago)

Yep I am using traefik -> nginx. I simply add the traefik tags to the nginx service. I didn't include that in the example file to keep it simple.

As for the storage, I use SeaweedFS (has a CSI plugin, really cool, works well with nomad) but as a CSI volume it's not suitable for backing postgres' filesystem. The lookups are so noticeably slower that your Lemmy instance will be laggy. So I decided to use a normal host volume, so the DB writes to disk directly, and you can back that up to an S3-compatible storage with this (also cool). Could be SeaweedFS, AWS, Backblaze...

I think SeaweedFS is suitable for your pictrs storage though, be it through its S3 API (supported by pictrs) or through a SeaweedFS CSI volume that stores the files directly.

I hope that answers it! Do let me know what you end up with