Could anyone help me set up a lemmy instance?

Submitted ⁨⁨19⁩ ⁨hours⁩ ago⁩ by ⁨revoirwinery@ttrpg.network⁩ to ⁨fediverse@lemmy.world⁩

I’m trying to follow the guide here join-lemmy.org/docs/…/install_docker.html

I get an error when I run docker compose up -d. It happens after docker outputs ⠹ Container lemmy-postgres-1 Starting

Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting "/home/user/lemmy/volumes/postgres" to rootfs at "/var/lib/postgresql/data": change mount propagation through procfd: open o_path procfd: open /var/lib/docker/overlay2/238f1ac3ed9eac5f9c1fdc9ee1851634765c83da087baccc4dfbf4fcc4316b32/merged/var/lib/postgresql/data: no such file or directory: unknown

I’m not really sure what this means, and trying all of AIs suggestions didn’t fix it.

I’m kinda new to all of this, so any help would be appreciated.

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jivandabeast@lemmy.browntown.dev ⁨9⁩ ⁨hours⁩ ago
This is the solution to your problem

Change your config to mount the data directory to /var/lib/postgresql instead of /var/lib/postgresql/data

My advice though, if your debugging skills are primarily comprised of asking AI for help, you’re in for a bit of a learning curve. The software is absolutely amazing (I’ve been running an instance since 2023), but weird things pop up and because this is so niche quick google searches are very limited and you gotta be willing to dive into github issues (this for example, I’ve also had to do it for pictrs to debug something a while ago).

Don’t feel discouraged though, this is probably the most rewarding thing I host (more than plex, immich, or any of the other “mainstream” things people talk about)

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- revoirwinery@ttrpg.network ⁨8⁩ ⁨hours⁩ ago
  Wow, thank you so much. This solved it.
  
  I’m honestly not that familiar with docker or lemmy, so I was just trying to follow the guide and look up issues as they arose.
  
  I simply could not figure this out after hours of trying, so I decided to call in the cavalry. I was not disappointed.
  
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  - jivandabeast@lemmy.browntown.dev ⁨59⁩ ⁨minutes⁩ ago
    Understandable, I will say you definitely chose to dive straight into the deep end choosing Lemmy 🤣 I think most people cut their teeth using docker on stuff like Plex and the related *arrs, then jump to the more complex stuff.
    
    But, it’s also the best way to learn so enjoy it :) stuff like this will become trivial eventually
    
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asudox@lemmy.asudox.dev ⁨19⁩ ⁨hours⁩ ago
Are you using postgresql 18? I tried upgrading yesterday from 17.6 and got an identical error message.

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- jivandabeast@lemmy.browntown.dev ⁨57⁩ ⁨minutes⁩ ago
  try this
  
  But, make a backup of your db beforehand. I don’t know how it would work when upgrading an existing database
  
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- revoirwinery@ttrpg.network ⁨19⁩ ⁨hours⁩ ago
  Yes, it looks like the supplied docker-compose.yml points to pgautoupgrade/pgautoupgrade:18-alpine for the postgres image.
  
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- poVoq@slrpnk.net ⁨19⁩ ⁨hours⁩ ago
  Indeed, Postgres 18 introduced some breaking changes and AFAIK Lemmy isn’t compatible with them yet. This will probably be fixed in the next release.
  
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  - revoirwinery@ttrpg.network ⁨18⁩ ⁨hours⁩ ago
    That’d be a relief if that’s the case.
    
    I’ve been getting a bit demoralized trying to figure this out.
    
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slazer2au@lemmy.world ⁨19⁩ ⁨hours⁩ ago

Post your compose file with the password removed. There my be an error in the file after you edited it.

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revoirwinery@ttrpg.network ⁨19⁩ ⁨hours⁩ ago

Thank you, here it is.

x-logging: &default-logging
  driver: "json-file"
  options:
    max-size: "50m"
    max-file: "4"

services:
  proxy:
    image: nginx:1-alpine
    ports:
      # Listen for outside connections on port 10633. You can freely change the left-side
      # number to a different port, eg using port 80 if you don't need a reverse proxy.
      - "10633:8536"
    volumes:
      - ./nginx_internal.conf:/etc/nginx/nginx.conf:ro,Z
      - ./proxy_params:/etc/nginx/proxy_params:ro,Z
    restart: always
    logging: *default-logging
    depends_on:
      - pictrs
      - lemmy-ui

  lemmy:
    image: dessalines/lemmy:0.19.13
    hostname: lemmy
    restart: always
    logging: *default-logging
    environment:
      - RUST_LOG="warn"
    volumes:
      - ./lemmy.hjson:/config/config.hjson:Z
    depends_on:
      - postgres
      - pictrs

  lemmy-ui:
    image: dessalines/lemmy-ui:0.19.13
    environment:
      - LEMMY_UI_LEMMY_INTERNAL_HOST=lemmy:8536
      - LEMMY_UI_LEMMY_EXTERNAL_HOST=mylemmysite.com
      - LEMMY_UI_HTTPS=true
    volumes:
      - ./volumes/lemmy-ui/extra_themes:/app/extra_themes
    depends_on:
      - lemmy
    restart: always
    logging: *default-logging

  pictrs:
    image: asonix/pictrs:0.5.19
    # this needs to match the pictrs url in lemmy.hjson
    hostname: pictrs
    # 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=passwordgoeshere
      - RUST_BACKTRACE=full
      - PICTRS__MEDIA__VIDEO__VIDEO_CODEC=vp9
      - PICTRS__MEDIA__ANIMATION__MAX_WIDTH=256
      - PICTRS__MEDIA__ANIMATION__MAX_HEIGHT=256
      - PICTRS__MEDIA__ANIMATION__MAX_FRAME_COUNT=400
    user: 991:991
    volumes:
      - ./volumes/pictrs:/mnt:Z
    restart: always
    logging: *default-logging

  postgres:
    image: pgautoupgrade/pgautoupgrade:18-alpine
    hostname: postgres
    environment:
      - POSTGRES_USER=lemmy
      - POSTGRES_PASSWORD=passwordgoeshere
      - POSTGRES_DB=lemmy
    shm_size: 1g
    volumes:
      - ./volumes/postgres:/var/lib/postgresql/data:Z
      - ./customPostgresql.conf:/etc/postgresql.conf
    restart: always
    logging: *default-logging

  postfix:
    image: mwader/postfix-relay
    environment:
      - POSTFIX_myhostname=mylemmysite.com
    restart: "always"
    logging: *default-logging

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0_o7@lemmy.dbzer0.com ⁨14⁩ ⁨hours⁩ ago
Out of the topic but, If you really want to install lemmy, I’d suggest you wait until version 1.0 or a couple bugfix release after it.

It’ll likely be more stable and you won’t have to deal with breaking changes. Might save yourself some headaches.

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INeedMana@piefed.zip ⁨19⁩ ⁨hours⁩ ago
I don’t have capacity to go all the way but it seems you’ve got a problem with creating the volume

This looks similar and was configuration error: https://stackoverflow.com/questions/73279935/error-while-mounting-volume-mount-through-procfd-not-a-directory-unknown

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