What is Lemmy?
Lemmy is a self-hosted social link aggregation and discussion platform. It is completely free and open, and not controlled by any company. This means that there is no advertising, tracking, or secret algorithms. Content is organized into communities, so it is easy to subscribe to topics that you are interested in, and ignore others. Voting is used to bring the most interesting items to the top.
Major Changes
HTTP API instead of Websocket
Until now Lemmy-UI used websocket for all API requests. This has many disadvantages, like making the code harder to maintain, and causing live updates to the site which many users dislike. Most importantly, it requires keeping a connection open between server and client at all times, which causes increased load and makes scaling difficult. That’s why we decided to rip out websocket entirely, and switch to HTTP instead. This change was made much more urgent by the sudden influx of new users. @CannotSleep420 and @dessalines have been working hard for the past weeks to implement this change in lemmy-ui.
HTTP on its own is already more lightweight than websocket. Additionally it also allows for caching of server responses which can decrease load on the database. Here is an experimental nginx config which enables response caching. Note that Lemmy doesn’t send any cache-control headers yet, so there is a chance that private data gets cached and served to other users. Test carefully and use at your own risk.
Two-Factor Authentication
New support for two-factor authentication. Use an app like andOTP or Authenticator Pro to store a secret for your account. This secret needs to be entered every time you login. It ensures that an attacker can’t access your account with the password alone.
Custom Emojis
Instance admins can add different images as emojis which can be referenced by users when posting.
Other changes
Progressive Web App
Lemmy’s web client can now be installed on browsers that support PWAs, both on desktop and mobile. It will use an instance’s icon and name for the app if they are set, making it look like a given instance is an app.
Note for desktop Firefox users: the desktop version of Firefox does not have built in support for PWAs. If you would like to use a Lemmy instance as a PWA, use use this extension.
Error Pages
Lemmy’s web client now has error pages that include resources to use if the problem persists. This should be much less jarring for users than displaying a white screen with the text “404 error message here”.
Route Changes
Pages that took arguments in the route now take query parameters instead. For example, a link to lemmy.ml’s home page with a few options used to look like this:
https://lemmy.ml/home/data_type/Post/listing_type/All/sort/Active/page/1
The new route would look like this:
https://lemmy.ml?listingType=All
Note that you now only have to specify parameters you want instead of all of them.
Searchable select redesign
The searchable selects, such as those used on the search page, have a new look and feel. No more inexplicable green selects when using the lightly themes!
Share button
Posts on the web client now have a share button on supported browsers. This can be used to share posts to other applications quickly and easily.
Lemmy-UI Overall look and feel
lemmy-ui is now upgraded to bootstrap 5, and every component is now much cleaner.
Special thanks to sleepless, alectrocute, jsit, and many others for their great work on improving and re-organizing lemmy-ui.
Database optimizations
Special thanks to johanndt, for suggesting improvements to Lemmy’s database queries. Some of these suggestions have already been implemented, and more are on the way.
Query speed is Lemmy’s main performance bottleneck, so we really appreciate any help database experts can provide.
Captchas
Captchas are not available in this version, as they need to be reimplemented in a different way. They will be back in 0.18.1, so wait with upgrading if you rely on them.
Upgrade instructions
Follow the upgrade instructions for ansible or docker.
If you need help with the upgrade, you can ask in our support forum or on the Matrix Chat.
Support development
We (@dessalines and @nutomic) have been working full-time on Lemmy for almost three years. This is largely thanks to support from NLnet foundation.
If you like using Lemmy, and want to make sure that we will always be available to work full time building it, consider donating to support its development. No one likes recurring donations, but they’ve proven to be the only way that open-source software like Lemmy can stay independent and alive.
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I apologize for the stability issues everyone.
People found an exploit and are using it to DDOS several lemmy instances.
Growing pains. You got popular, now you’ve got a target on your back.
That’s what happens when you start getting popular. Lemmy will survive it :D
So Reddit has decided to fight back, eh?
Not sure, it is a coordinated DDOS attack tho. I welcome them doing these, because it only strengthens lemmy, and helps us find bugs.
How is your personal life btw? I was feeling bad for you guys because I imagine dealing with the (welcome) explosion of your project must take all your time… Are you studying?
Its good, thanks for asking <3 . I do have a high-score of github notifications ( > 1200 ), and hundreds of people all trying to get my attention. I’ve settled into a rhythm now tho where I just work on what I think is important, take lots of breaks, and try to keep a regular schedule.
As in any project the few loud voices can be the most damaging. Please isolate yourself from that and understand the quiet majority greatly appreciates what your doing and recognizes the pressure you probably feel lately!
That’s excellent. What do you do for a living, by the way? Because Lemmy can’t be your day job, obviously!
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Is it like a grant then?
True. Better now before the bigger exodus after the third party apps are shut down.
exploit […] coordinated […] bugs
Hilariously wrong on all three points. It’s a Python script I wrote in under a minute making identical requests to the same thread fewer than 10 times a second; Lemmy’s complete lack of caching isn’t a “bug”. That this extremely simple vector instantly brought down even the high-spec Lemmy.World instance with a low volume of requests is sad, and it’s tiring to see Lemmy zealots spam my communities advertising this tankie spaghetti code jank as an alleged reddit “alternative” when it topples from this. The multiple attack vectors I’ve tested make it abundantly clear that Lemmy’s team has been incapable of performing even the most basic possible load testing.
Won’t be responding to or reading any replies, don’t care.
BTW, ltree is a horrifically bad solution for comment trees, and any of the self-proclaimed “Postgres professionals” in these threads should be able to explain why if they have even the slightest bit of RDBMS knowledge.Ever hear of responsible disclosure numbnuts? Guess not.
those fat fucks
Query speed is Lemmy’s main performance bottleneck, so we really appreciate any help database experts can provide.
I have been pleading that Lemmy server operators install pg_stat_statements extension and share metrics from PostgreSQL. https://lemmy.ml/post/1361757 - a restart of PostgreSQL server is required for the extension to be installed. I suggest this be part of 0.18 upgrade. Thank you.
I think this kind of analysis can help a lot, sadly I don’t see anyone interacting on your post.
Please do keep pushing for it and writing down your discoveries and explanations might help others understand the importance.
Howto with real world data (like you are doing) is helping and is quite interesting.
Does having that extension enabled affect performance at all? Just curious
Not original commenter. No performance impact that I know of but it takes a bit of shared memory (hence the restart).
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My favorite feature is that upvotes now have a spinner that lets you know they actually got processed by the server. On 0.17 I would click an upvote and it would sometimes flash between on and off state or not be very obvious that it actually went through.
Such a big improvement!
i think my favorite feature is that errors while posting no longer silently fail. however, since they do show in a small popup box with a short timer, if i’m not paying attention, i’ll still miss them, and it’ll look like it failed silently.
This would be my favorite feature if not for the fact that apparently there’s a bug where voting causes all of them to become uncollapsed at once.
there’s a bug where voting causes all of them to become uncollapsed at once.
perhaps don’t collapse stuff?
Thanks! I’m super excited about all the contributions making this site and its UI better.
That’s the difference between an open source project like this and privatized software like reddit; we can add features we want directly.
Thank you for your hard work ❤️
Holy fuck man! As someone who wants to be a Web Dev, it’s really exciting to see open source projects where people develop without any financial incentives! It’s mind boggling how much this community is getting together to improve the experience of everyone!
Yeah Open Source is the foundation, and the future!
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The changes were nice!
Test fro mlem
Test 2
Another addition that wasn’t covered in the release notes, these will now automatically be linked to your local instance without having to do anything:
Edit: Forgot about kbin support
The markup is rendered as links when a valid format is detected without modifying the underlying text:
There was like 200 comments worth of discussion on this and it seems like it was implemented without much fanfare. What gives? This is one of the biggest gripes I had early on. I’m gonna shout this from the roof tops
I saw those giant threads where it was being discussed in circles and decided to take a crack at implementing it myself. Turns out it was not that difficult, I think I was just the first developer who found the threads and took action. Everyone else was focused on getting bug fixes into this release.
Another small one I added that wasn’t called out is images now have title tags, so they will show their alt text on hover. This is also useful for screen readers.
Thank you for both of those!
Updated my comment, I forgot to mention it also supports the kbin /m/ format for communities
Wow, that’s a nice change! Thanks for sharing!
Thanks for the shout out, @dessalines@lemmy.ml. It’s a pleasure contributing to this awesome project.
o7 thank you for your service.
This is a known issue on the web ui - we’re looking into it.
Thanks for linking! It is ‘closed as completed’, but I still get it every time?
When a GitHub issue is closed as complete it means someone has fixed the bug in the source code (or the developers have decided it’s not a bug). It doesn’t necessarily mean the fix has been shipped in a new version or that the server you’re connecting through has been updated to a version with the fix. In this case, they haven’t shipped a new version with this fix in it. I’m not sure what the delivery cadence will be but I assume a new version will go out in the next week or so and then once your server admin upgrades their server the problem will be fixed for you.
Same here. On Fennec for Android, though.
Is that another Lemmy Android app? Not familiar with the name
I believe it’s a fork of Firefox
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Thanks! I’m really glad we could get this out before the end of the month (when reddit kills 3rd party apps).
Also now we should be able to do a lot more frequent bugfix releases.
Damn, big update! I see a lot of people are contributing, that’s really the biggest gift from Reddit’s poor decisions (well, presuming contributions did increase, which is a fair assumption).
That’s why I love open source software, it’s truly a community effort!
Not sure what changed but the UX feels much more responsive than it did a couple days ago. Great work!
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I have the same issue but it’s only because my Chrome on iOS hard-cached 0.18-rc instead of 0.18. The official 0.18 release has this bug fixed (I fixed it).
Try clearing your site data on your mobile browser or just wait for the cache to expire I guess. 🤔
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So, the auto update is no longer active for the feeds. That is a good thing! However, I think Lemmy now needs a refresh button.
When I move away from my defaults (eg to check “new”), it isn’t easy to update the new feed (when I refresh I need to reselect new)
how is that a good thing?
The auto update was awful for usability. Hate my page randomly jumping around when I’m trying to read.
it was good for usability actually, i wish more sites would implement that (i might just go on GH and fork .16 so that I can turn .16 into a client that never gets new versions)
If you were reading something the page would jump up by itself.
i’d rather have that than have to constantly refresh sites
You’re very much in the minority, then; it’s absolutely terrible from a usability perspective.
Good that websockets are going. Lemmy sucks up battery like nobody’s business and for ultimately a negative payout
How were you using this page then? It made reading a post uninterrupted absolutely impossible. Even browsing the feed was aweful because when you wanted to open a post suddenly a hundred other posts would load and shift the one you wanted down, so you had to search for it again.
The image I uploaded got rotated on lemmy:
Pictrs probably didn’t honor EXIF rotation metadata, or strip them entirely for privacy reason.
Pictrs removes Exif data, yes. Most likely it removed the rotation data as well.
Shouldn’t it keep some EXIF data though, like the image copyright?
No, it kept the rotation data that said to rotate 90 CCW. Here’s the source:
https://commons.wikimedia.org/wiki/File:Kori_Bustard_at_Pilanesberg_National_Park_-_49695166243.jpg
It was exactly that, I removed it and now it’s correct, thanks
This issue’s currently being tracked.
It was because of the exif rotation data, I removed it to fix the rotation. Thank you
Great, it seems that there’s way less error message on Jerboa now with this update.
yay! thank you all!
i have made a not-so-quick-but-dirty Dockerfile to build on arm64
FROM rust:1.70.0 WORKDIR /app COPY . . RUN echo "pub const VERSION: &str = \"$(git describe --tag)\";" > "crates/utils/src/version.rs" RUN cargo build --release RUN apt update RUN apt -y install libpq5 RUN cp /app/target/release/lemmy_server /app/lemmy CMD ["/app/lemmy"]later I am planning to improve it a bit, to make the image smaller if i can
Wow, I was just fiddling around with this. Thank you!
