How to modify the file owner and group of the storage directory in the docker-compose.yml file of owncloud

Server
1

my owncloud docker-compose.yml file

version: "3"
services:
  owncloud:
    image: owncloud/server
    container_name: owncloud_server
    restart: always
    ports:
      - 8102:8080
    depends_on:
      - mariadb
      - redis
    environment:
      - OWNCLOUD_DOMAIN=192.168.0.205,192.168.1.205
      - OWNCLOUD_TRUSTED_DOMAINS=192.168.0.205,192.168.1.205
      - OWNCLOUD_DB_TYPE=mysql
      - OWNCLOUD_DB_NAME=owncloud
      - OWNCLOUD_DB_USERNAME=owncloud
      - OWNCLOUD_DB_PASSWORD=123
      - OWNCLOUD_DB_HOST=mariadb
      - OWNCLOUD_ADMIN_USERNAME=admin
      - OWNCLOUD_ADMIN_PASSWORD=123
      - OWNCLOUD_MYSQL_UTF8MB4=true
      - OWNCLOUD_REDIS_ENABLED=true
      - OWNCLOUD_REDIS_HOST=redis
    healthcheck:
      test: ["CMD", "/usr/bin/healthcheck"]
      interval: 30s
      timeout: 10s
      retries: 5
    volumes:
      - files:/mnt/data

  mariadb:
    image: mysql # minimum required ownCloud version is 10.9
    container_name: owncloud_mariadb
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=123
      - MYSQL_USER=owncloud
      - MYSQL_PASSWORD=123
      - MYSQL_DATABASE=owncloud
      - MARIADB_AUTO_UPGRADE=1
    command: ["--max-allowed-packet=128M", "--innodb-log-file-size=64M"]
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-u", "root", "--password=owncloud"]
      interval: 10s
      timeout: 5s
      retries: 5
    volumes:
      - mysql:/var/lib/mysql

  redis:
    image: redis
    container_name: owncloud_redis
    restart: always
    command: ["--databases", "1"]
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 10s
      timeout: 5s
      retries: 5
    volumes:
      - redis:/data

Due to certain reasons, I have discovered that the users storing files are www-data users and www-data groups. I would like to modify the storage user’s ID to complete certain tasks.
thank you !
from sam123

2

Hey,

i think it could be possible that some knowledge on the permission / owner topic could be gained from the following recent discussion:

3

I just want the www-data user’s ID in the container to change to another ID number

4

Hey,

if i’m understanding the postings in the thread linked above correctly it is currently not possible to choose a different ID number “out of the box” in the ownCloud docker containers. If i understand it correctly either www-data is used or no IDs are getting changed.

5

You can do that with Podman using its usernamespaces feature, but Docker doesn’t seem to implement that feature by default Isolate containers with a user namespace | Docker Docs. It’s one of the many architectural differences behind my reasoning for switching to Podman. I believe that all of these add up to make Podman more a secure platform that works with a typical Linux stack instead of on top of the OS as like a frankensteined piece of software.