How do I set internal docker container user?

[malibu1966]

Hi there, I am trying to use the requarks/wiki image to install wiki.js and I keep getting file permission errors. I have my volumes on an NFS mount and it is set up to be accessed by user 1001 but when I try to run compose up with those settings, wiki.js doesn't work. Is there a way to set the active user inside the container?

Here is my compose file:

services:
  wikijs:
    image: ghcr.io/requarks/wiki:latest
    user: "1001:1001"
    ports:
      - "3334:3000"
    environment:
      DB_TYPE: postgres
      DB_HOST: db
      DB_PORT: 5432
      DB_USER: wikijs
      DB_PASS: wikijs1234
      DB_NAME: wiki
    volumes:
      - /library-rw/config/wiki.js/data:/wiki/data

  db:
    image: postgres:latest
    user: "1001:1001"
    environment:
      POSTGRES_DB: wiki
      POSTGRES_USER: wikijs
      POSTGRES_PASSWORD: wikijs1234
    volumes:
      - /library-rw/config/wiki.js/postgresql:/var/lib/postgresql/data

[AkhilSirvi]

It’s probably happening because the containers are being forced to run as user 1001, but Wiki.js and Postgres both expect to run as their own internal users. Wiki.js normally runs as UID 1000 and Postgres runs as UID 999, and changing that breaks permissions especially on NFS.
the fix is to remove the user: "1001:1001" lines from both services and instead make sure your NFS folders are owned by the right UIDs on the host:

chown -R 1000:1000 /library-rw/config/wiki.js/data
chown -R 999:999 /library-rw/config/wiki.js/postgresql

If NFS has root-squash enabled, you may also need to adjust the export so Docker can set permissions, or create the directories with the correct ownership beforehand.
After that docker compose up should work normally