Also tried it with pictrs_url: "http://pictrs:8080" (as described here), but that didn't help either.
Why is lemmy trying to access localhost:8080 rather than pictrs:8080?
Are you running lemmy 0.18.0? It breaks a bunch of internal network connectivity. The short term solution is to add an external network to both the lemmy-ui and pictrs containers, then you can change http://pictrs:8080 to http://your_domain.
Note: there are also some issues in 0.18.0 with comment federation at the moment. Please reply to confirm this comment was seen, thanks!
Well, butter my butt and call me a biscuit. In implementing this, I stumbled upon an issue: I had the url in pictrs_config, when it should have been pictrs.
Now at least the logs are showing an error that matches the toaster:
2023-06-25T13:09:27.753749368Z 2023-06-25T13:09:27.753609Z WARN lemmy_server::root_span_builder: error decoding response body: expected value at line 1 column 1
2023-06-25T13:09:27.753809022Z reqwest::Error { kind: Decode, source: Error("expected value", line: 1, column: 1) }
I already have those containers in an external network, and changing the URL hasn't fixed it.
Oh, this span builder error. Yeah I’ve been seeing that error since I upgraded to 0.18.0. Sorry, I don’t have a solution for this one.
Glad you figured out your pictrs error though! One other thing I did was update my resolve.conf so that valid DNS hosts were making it to the containers. Also try rebooting your host.