this post was submitted on 01 Jul 2023
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Lemmy.World Announcements

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Looks like it works.

Edit still see some performance issues. Needs more troubleshooting

Update: Registrations re-opened We encountered a bug where people could not log in, see https://github.com/LemmyNet/lemmy/issues/3422#issuecomment-1616112264 . As a workaround we opened registrations.

Thanks

First of all, I would like to thank the Lemmy.world team and the 2 admins of other servers @[email protected] and @[email protected] for their help! We did some thorough troubleshooting to get this working!

The upgrade

The upgrade itself isn't too hard. Create a backup, and then change the image names in the docker-compose.yml and restart.

But, like the first 2 tries, after a few minutes the site started getting slow until it stopped responding. Then the troubleshooting started.

The solutions

What I had noticed previously, is that the lemmy container could reach around 1500% CPU usage, above that the site got slow. Which is weird, because the server has 64 threads, so 6400% should be the max. So we tried what @[email protected] had suggested before: we created extra lemmy containers to spread the load. (And extra lemmy-ui containers). And used nginx to load balance between them.

Et voilΓ . That seems to work.

Also, as suggested by him, we start the lemmy containers with the scheduler disabled, and have 1 extra lemmy running with the scheduler enabled, unused for other stuff.

There will be room for improvement, and probably new bugs, but we're very happy lemmy.world is now at 0.18.1-rc. This fixes a lot of bugs.

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[–] [email protected] 5 points 1 year ago* (last edited 1 year ago)

Favicon seems to be missing now. Just a heads up! @[email protected]

[–] [email protected] 5 points 1 year ago

Thanks! Seems to be working fine so far.

[–] [email protected] 5 points 1 year ago

Really like seeing posts like this that explain what's going on. Thanks for all the hard work!

[–] [email protected] 5 points 1 year ago

Thanks for the update. I especially like the transparency on not only the β€œupgrade” itself but also the potential issues encountered, together with the solutions. Seems rare nowadays, or I’m just seeing less and less people doing this.

[–] [email protected] 5 points 1 year ago

New user registrations closed until tomorrow

Warning: Be careful, this might trigger this bug here: https://github.com/LemmyNet/lemmy/issues/3422#issuecomment-1616112264

[–] [email protected] 5 points 1 year ago

Thank you for the hard work! Enjoying Lemmy.world quite a bit. :)

[–] [email protected] 4 points 1 year ago

Thanks so much for everything!

[–] [email protected] 4 points 1 year ago

I like it.
The site feels a lot better to me, and seems significantly gentler in terms of browser resource consumption.

[–] [email protected] 4 points 1 year ago

I can finally login!

[–] [email protected] 4 points 1 year ago

This looks like it’s exposed some weaknesses, and it sounds like the team has it under control.

I’m moving right now and can’t dedicate time to development, but once I’m up and running I should be able to start contributing.

Scalability is always a concern with these sites, so there’s plenty to do to improve that

[–] [email protected] 4 points 1 year ago (1 children)

Awesome! Loading issues are still the bane of Lemmy's existence though, or at least it is for me and my experience with Lemmy. Everything just loads so slow. Sorting is still broken as well. Communities that I KNOW that are active just show as blank for me no matter what I sort by.

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[–] [email protected] 4 points 1 year ago

Awesome work guys! The NEW front page of the internet is born.

[–] [email protected] 4 points 1 year ago
[–] [email protected] 4 points 1 year ago (1 children)

Is there a issue with the api? ( Because the api wrapper lemmy-js-client doesnt work on login. ) I tried it yesterday but not today yet. I will test it when i can :)

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[–] [email protected] 4 points 1 year ago

Excellent news! I can browse Lemmy on my phone again, many thanks to you @Ruud and everyone else who worked on this!

[–] [email protected] 4 points 1 year ago

It keeps logging me out, plus when I log in, alarmingly other users' profile names flash in the top right corner for a second.

[–] [email protected] 4 points 1 year ago

Excellent. Now I can login with jerboa πŸŽ‰

[–] [email protected] 4 points 1 year ago

Special thanks to the other guys for helping make this update possible. Site is snappier than ever and the UI looks fantastic.

[–] [email protected] 4 points 1 year ago

Thank you!!

[–] [email protected] 4 points 1 year ago

Hey man I just want to say thank you for your hard work.

[–] [email protected] 4 points 1 year ago* (last edited 1 year ago) (1 children)

Have you considered running your Lemmy instance on more than a single machine? If it is possible to run two lemmy containers anyway (ie, lemmy is not a singleton), why not run them on separate machines? With load balancing you could achieve a more stable experience. It might be cheaper to have many mediocre machines rather than a single powerful one too, as well as more sustainable long-term (vertical vs horizontal scaling).

The downside would be that the set-up would be less obvious than with Docker compose and you would probably need to get into k8s/k3s/nomad territory in order to orchestrate a proper fleet.

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[–] [email protected] 4 points 1 year ago

Is there a way to follow the update status while this instance is down?

I knew the update was coming, so I expected the downtime, but I could not find any info about when it was expected to be up and running again?

Thanks for the great and ongoing work put into managing this endeavor!

[–] [email protected] 4 points 1 year ago

We're alive!!!

Thank you :)

[–] [email protected] 4 points 1 year ago

Great stuff!

[–] [email protected] 4 points 1 year ago

I really enjoy how lemmy is growing!

[–] [email protected] 4 points 1 year ago

Thanks! Now I can use Connectβ„’ for Lemmy without problems. πŸ‘πŸ™‚

[–] [email protected] 4 points 1 year ago

Not sure what fixed it (I'm sure though on my side I did nothing since the last failed login) but the login form finally works again!

[–] [email protected] 4 points 1 year ago

We're back baby!

[–] [email protected] 3 points 1 year ago

This is awesome. Was a fun read too. Super cool to see what was going on behind the scenes.

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