running MongoDB with rootless podman - Stack Overflow

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I have the following system:

Fedora 41
podman-compose version 1.3.0
podman version 5.3.2

and I followed this tutorial for rootless podman. basically pasta for rootless networking, and the /etc/subuid and /etc/subgid configuration.

Then I tried the following steps:

# creating directories
mkdir -p ~/podman-volumes/mongo/data ~/podman-volumes/mongo/logs
mkdir -p ~/podman-volumes/mongo/config/

# create mongod.conf w/ contents
vim ~/podman-volumes/mongo/config/mongod.conf

storage:
  dbPath: /data/db

systemLog:
  destination: file
  path: /var/log/mongodb/mongo.log
  logAppend: true

net:
  bindIp: 0.0.0.0
  port: 27017

# create directory w/ compose file
mkdir -p ~/mongodb/
vim ~/mongodb/docker-compose.yml

services:
  mongodb:
    image: mongo:latest
    container_name: mongodb
    restart: always
    ports:
      - "27017:27017"
    environment:
      MONGO_INITDB_ROOT_USERNAME: admin
      MONGO_INITDB_ROOT_PASSWORD: secret
    volumes:
      - ~/podman-volumes/mongo/data:/data/db
      - ~/podman-volumes/mongo/logs:/var/log/mongodb
      - ~/podman-volumes/mongo/config/mongod.conf:/etc/mongod.conf:ro
    command: ["--config", "/etc/mongod.conf"]

All directories and files have my current user as owner.

when I first executed podman-compose up I get the error chown: changing ownership of '/data/db': Permission denied - I then somewhere found that mongodb is running with user ID 999 inside the container, and I could probably fix it with the following command:

podman unshare chown -R 999:999 ~/podman-volumes/mongo/data

This solved the one mentioned problem, but I still get find: '/data/db': Permission denied. Somehow this should have been solved by the podman unshare command, but it didn't.

I tried adding user: "1000:1000" (which is my current user ID) to the compose file, still no luck.

my question(s):

• what do I need to do to get MongoDB running, with my custom configuration?
• how can I determine which user ID is used in a container ?

Just a note: I'm having the same problems with lots of other images (e.g. Elastic, Logstash) when I provide a custom configuration file and I want the logs to be stored locally, I always get permission denied

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