no matching entries in group file

[tcurdt]

Description of the issue

Docker compose does not find some of the groups when setting a user.

Context information

Output of docker-compose version

ocker-compose version 1.21.0, build unknown
docker-py version: 3.4.1
CPython version: 3.7.3
OpenSSL version: OpenSSL 1.1.1d  10 Sep 2019

Output of docker version

Client:
 Version:           18.09.1
 API version:       1.39
 Go version:        go1.11.6
 Git commit:        4c52b90
 Built:             Tue, 03 Sep 2019 19:59:35 +0200
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.09.1
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.11.6
  Git commit:       4c52b90
  Built:            Tue Sep  3 17:59:35 2019
  OS/Arch:          linux/amd64
  Experimental:     false

Output of docker-compose config

services:
  alertmanager:
    command:
    - --config.file=/etc/alertmanager/config.yml
    - --storage.path=/alertmanager
    container_name: alertmanager
    image: prom/alertmanager:v0.20.0
    ports:
    - 127.0.0.1:9093:9093/tcp
    restart: unless-stopped
    user: nobody:docker
    volumes:
    - /srv/compose/alertmanager:/etc/alertmanager:ro
version: '3.6'

Steps to reproduce the issue

The above works with the group adm. Now I've added a new group

# grep docker /etc/group
docker:x:113:

Changing the config to

user: 'nobody:docker'

which then results in

ERROR: for alertmanager  Cannot start service alertmanager: linux spec user: unable to find group docker: no matching entries in group file

but using the gid works correctly

user: 'nobody:113'

Now the question is why does docker compose not find the group?
What group file does it check? It must be a different one.

Observed result

1. resolves adm correctly.
2. fails to resolve docker correctly.

Expected result

1. resolves adm correctly.
2. resolves docker correctly.

Stacktrace / full error message

ERROR: for 5f66885213d0_alertmanager  Cannot start service alertmanager: linux spec user: unable to find group docker: no matching entries in group file

ERROR: for alertmanager  Cannot start service alertmanager: linux spec user: unable to find group docker: no matching entries in group file
ERROR: Encountered errors while bringing up the project.

Additional information

This is on debian buster.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tcurdt]

AFAIK this still is an issue. Using gid is a very ugly work around.

[stale]

This issue has been automatically marked as not stale anymore due to the recent activity.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it had not recent activity during the stale period.

[ovokpus]

still unresolved, Mr Bot!

[sammcj]

Still an issue in 2023...

Fedora 38:

$ grep -3 render docker-compose.yaml
    group_add:
      - video
      - render

$ grep render /etc/group
render:x:105:app

$ docker-compose up -d
ERROR: for plex  Cannot start service app: Unable to find group render: no matching entries in group file
ERROR: Encountered errors while bringing up the project.

$ sed -i 's/render/105/g' docker-compose.yaml

$ grep -3 render docker-compose.yaml
    group_add:
      - video
      - 105
$ docker-compose up -d
Starting app   ...

(success)

[lukaslangrock]

thanks for the GID tipp ^^
but yeah +1 have the same issue

[Eoin-ONeill-Yokai]

GID tip is great, still having this issue myself.

[Liquidmasl]

this is still an issue in 2025, bot please reopen this