Default docker group is root(0) contrary to documents

[mvadu]

Documentation:
https://grafana.com/docs/grafana/latest/installation/docker/#migrate-to-v51-or-later
"The Grafana Docker image runs with the root group (id 1) instead of the grafana group (id 472), for better compatibility with OpenShift. "

What happened:
Running fresh docker container on ubuntu 20 with

version: '3.3'

services:
  grafana:
    container_name: grafana
    image: grafana/grafana
    restart: unless-stopped
    ports:
    - "3000:3000"

Checking the user running the grafana process shows the uid to be 472 and gid as 0.

bash-5.0$ uname -a
Linux 7a3db0a0ed2e 5.4.0-65-generic #73-Ubuntu SMP Mon Jan 18 17:25:17 UTC 2021 x86_64 Linux
bash-5.0$ id
uid=472(grafana) gid=0(root) groups=0(root)
bash-5.0$ grafana-server -v
Version 7.4.0 (commit: c2203b9859, branch: HEAD)

What you expected to happen:
uid=0(root) gid=0(root) groups=0(root)

How to reproduce it (as minimally and precisely as possible):
See the docker compose above

Anything else we need to know?:
The documentation might need to be updated to clarify the default user is still 472, and the root group is 0 and not one. Since the source code is setting it to 0 here

[marefr]

It's actually part of the upgrade notes here https://grafana.com/docs/grafana/latest/installation/docker/#migrate-to-v73-or-later

[mvadu]

@marefr please see my last comment. The document you linked talks about root id 1, where as code is setting it to 0. Reading the document it was not clear to me that user ID is still 472, and not same as group ID.

[marefr]

Oops sorry. Just noticed upgrade to 5.1 or later referenced in the link. You're right

[marefr]

Going to discuss with the author of #29222 whether it was meant to use zero or one.