Support / questions about Lemmy.
Here's how I do it. Might be worth giving it a shot. This is on FreeBSD, but I doubt that matters.
git clone https://github.com/LemmyNet/lemmy.git lemmy
cd lemmy
git checkout 0.17.3
git submodule init
git submodule update --recursive --remote
echo "pub const VERSION: &str = \"$(git describe --tag)\";" > "crates/utils/src/version.rs"
cargo build --release
strip target/release/lemmy_server
Then copy target/release/lemmy_server to wherever you want to run it.
I've seen guys here making PR's to docs and install scripts, hope someone gonna do the same after finding solution for your question.
Thanks.
So if I go on a mad chmod spree, making /usr/bin/lemmy_server and all of its dependencies readable/executable (which is super insecure) I finally get to this log message in journalctl:
Jun 07 13:50:57 ip-172-31-4-153 lemmy_server[3868]: thread 'main' panicked at 'C
ouldn't run DB Migrations', /home/ubuntu/.cargo/registry/src/index.crates.io-6f1
7d22bba15001f/lemmy_db_schema-0.17.3/src/utils.rs:165:25
Which is this code:
pub fn run_migrations(db_url: &str) {
// Needs to be a sync connection
let mut conn =
PgConnection::establish(db_url).unwrap_or_else(|_| panic!("Error connecting to {db_url}"));
info!("Running Database migrations (This may take a long time)...");
let _ = &mut conn
.run_pending_migrations(MIGRATIONS)
.unwrap_or_else(|_| panic!("Couldn't run DB Migrations"));
info!("Database migrations complete.");
}
Hope that helps someone figure this out.
I'm pretty unhappy that I can't get this to work.
We need some help here....
So I am able to build from the git repo.
Had to remove rust from apt (v 1.65)
And install rust from rustup (v 1.70)
That fixes the build, but now I still get this db migrations error on startup.
Jun 09 15:47:37 ip-x systemd[1]: Started Lemmy - A link aggregator for the fediverse.
Jun 09 15:47:37 ip-x lemmy_server[15239]: 2023-06-09T15:47:37.238544Z INFO lemmy_db_schema::utils: Running Database migrations (This may take a long time)...
Jun 09 15:47:37 ip-x lemmy_server[15239]: thread 'main' panicked at 'Couldn't run DB Migrations', crates/db_schema/src/utils.rs:165:25
Jun 09 15:47:37 ip-x lemmy_server[15239]: note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Jun 09 15:47:37 ip-x systemd[1]: lemmy.service: Main process exited, code=exited, status=101/n/a
I know it can connect to the db because I see it created some tables already.
I wonder if this is related to this warning regarding schema, which I see during the build.
warning: /root/git-clones/lemmy/crates/api_common/Cargo.toml: `default-features` is ignored for lemmy_db_schema, since `default-features` was not specified for `workspace.dependencies.lemmy_db_schema`, this could become a hard error in the future
> thread 'main' panicked at 'Couldn't run DB Migrations', crates/db_schema/src/utils.rs:165:25
I fixed this by issuing:
sudo -iu postgres psql -c “ALTER USER lemmy WITH SUPERUSER;”
Obviously this has database security implications, but at least it identified that was why DB Migrations is failing.
EDIT: I found the developers of Lemmy seem to have identified the cause for this, it's just a couple SQL statements: https://github.com/LemmyNet/lemmy/pull/2983/commits/29c4144e61e97e895fb7eb37d2c257c8520fd6a6
EDIT 2: The developers are currently treating this as a documentation bug: https://github.com/LemmyNet/lemmy-docs/issues/201
Thank you!
So the git based build instructions from @Grouchy@lemmy.grouchysysadmin.com works.
What was missing for me was then the rust version and the full list of sql commands.
1. Rust version
Remove rust installed from Ubuntu apt repo (v 1.65)
Install rust from rustup (v 1.70)
2. Postgres commands
sudo -iu postgres psql -c "CREATE USER lemmy WITH PASSWORD 'db-passwd';"
sudo -iu postgres psql -c "CREATE DATABASE lemmy WITH OWNER lemmy;"
sudo -iu postgres psql -c "ALTER USER lemmy WITH SUPERUSER;"
The lemmy-ui steps, the next part - are pretty outdated. It has instructions to install NodeJS 12.x, which is really far back. I have no idea which version the Docker install is using...
The latest version of Node is 20
Before I even get there, the instructions say I should be able to run
curl localhost:8536/api/{version}/site
And it should return some json structure.
But I see this returning 404
lemmy_server[41511]: 2023-06-09T17:02:35.296098Z INFO actix_web::middleware::logger: 127.0.0.1 "GET /api/0.17.3/site HTTP/1.1" 404 0 "-" "curl/7.81.0" 0.000074
Is that the correct way to specify the version?
Is there a better log than journalctl which would actually tell me what REST endpoints it is using?
Is that the correct was to specify the version?
No, I had to dig around too, the correct command is:
curl localhost:8536/api/v3/site
Thank you, again!
How was I to know {version} in the REST endpoint path was supposed to be "v3"?
Any luck with the lemmy-ui install?
I found another documentation page that actually tells you how to get the "v3" version....
https://join-lemmy.org/docs/en/contributors/04-api.html
That needs to be part of the "Lemmy from Scratch" documentation page too.
I knew it was v3 because I saw a webapp failure on one of the Lemmy instance (lemmy.ml) I was using ;) We need to update those install documents.
It seems right now I can get a client to load, but websockets aren't working. Others on Reddit reported the same issue: https://old.reddit.com/r/Lemmy/comments/142sszq/spinning_up_lemmy_websockets_dont_connect/
EDIT: Ok, I solved the websocket problem by using proper nginx config that the instructions said. I was confused about the domain names with the certification generation as I already had some nginx certs for other subdomains in place.
I'm glad you got it working :)