this post was submitted on 23 Jul 2023
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self hosted lemmy 502 pictrs (reddthat.com)
submitted 1 year ago by [email protected] to c/[email protected]
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Hi,

I've been trying to host my own lemmy instance for a while. i've almost got it working (i think). But my problem now is that whenever i try to post something with a picture i get an error SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data. In firefox i get a 502 bad gateway error pointing to https://lemmy.emphisia.nl/pictrs/image I don't really know why because everything seems to be working

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[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (8 children)

Depends. If it runs in a separated docker network then not. Pict-rs only needs to be reachable by the lemmy backend and have out-going internet access. But I would try changing the port as I think the official docker-compose script removed the internal network for some reason, not sure (I am using my own Podman based setup).

[–] [email protected] 0 points 1 year ago (7 children)

it does appear to be in its own network (according to portainer) the error log in the lemmy container is

2023-07-23T13:58:44.850844Z  WARN lemmy_server::root_span_builder: Request error: error sending request for url (http://127.0.0.1:8080/image): error trying to connect: tcp connect error: Connection refused (os error 111)

Reqwest(reqwest::Error { kind: Request, url: Url { scheme: "http", cannot_be_a_base: false, username: "", password: None, host: Some(Ipv4(127.0.0.1)), port: Some(8080), path: "/image", query: None, fragment: None }, source: hyper::Error(Connect, ConnectError("tcp connect error", Os { code: 111, kind: ConnectionRefused, message: "Connection refused" })) })

no errors appear when i look at the pictrs log. I don't know why it says password: None as i've set a password

[–] [email protected] 1 points 1 year ago (6 children)

Hmm not sure. The api-key ENV variable changed with pict-rs 0.4 to PICTRS__SERVER__API_KEY, maybe double-check that this is correctly updated and also the same as in your lemmy.hjson config file.

[–] [email protected] 1 points 1 year ago (2 children)

PICTRS__SERVER__API_KEY

the config in docker compose looks like

  pictrs:
    image: asonix/pictrs:0.4.0
    # this needs to match the pictrs url in lemmy.hjson
    hostname: 127.0.0.1
    # we can set options to pictrs like this, here we set max. image size and forced format for conversion
    # entrypoint: /sbin/tini -- /usr/local/bin/pict-rs -p /mnt -m 4 --image-format webp
    environment:
      - PICTRS_OPENTELEMETRY_URL=http://otel:4137
      - PICTRS__SERVER__API_KEY=****
      - RUST_LOG=debug
      - RUST_BACKTRACE=full
      - PICTRS__MEDIA__VIDEO_CODEC=vp9
      - PICTRS__MEDIA__GIF__MAX_WIDTH=256
      - PICTRS__MEDIA__GIF__MAX_HEIGHT=256
      - PICTRS__MEDIA__GIF__MAX_AREA=65536
      - PICTRS__MEDIA__GIF__MAX_FRAME_COUNT=400
    user: 991:991

and in the config it is

  pictrs: {
    url: "http://127.0.0.1:8080/"
    api_key: "****"
  }

the password on both is the same so i don't see what is going wrong :(

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

I haven't done this setup myself, but the hostname being 127.0.0.1 is suspect, especially since it mentions a pictrs URL config in lemmy.

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

yeah i changed that because i was testing. but i now realize that was dumb. ive change both the hostname and the url to pictrs. OMG that just worked..... i feel so dumb rn. it is strange tho because that wasnt working before. Thanks for all the help :)

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

Well, did you try changing the 8080 port to rule that out?

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

hmm after looking i dont even see an option to change the port (in pictrs). it seems stuck at 8080, but since its running on its own network, i doubt it would matter.

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

just change the port the container exposes, like -p 8081:8080

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