[Not Accepted] Support docker compose group_add

Feature Requests
1

docker compose group_add: allows the docker user to have secondary groups. This can be used to allow access to data that the docker user’s primary uid/gid cannot access. Rather than changing all the templates to ask for secondary GIDs, the existing group ID could allow a comma-separated list, eg.:

Group ID: 3010,3011,3012

would set primarily gid to 3010, and secondary gids 3011-3012.

Documentation reference: Services | Docker Docs

group_add

group_add specifies additional groups, by name or number, which the user inside the container must be a member of.

An example of where this is useful is when multiple containers (running as different users) need to all read or write the same file on a shared volume. That file can be owned by a group shared by all the containers, and specified in group_add.

services:
  myservice:
    image: alpine
    group_add:
      - mail

Thank you,

Evan

2

Thank you for submitting this feature request. After keeping it open to gauge community interest, we’re closing it as it hasn’t received enough votes to prioritize for development.