Add user to docker group

[coyote]

Is there a recommended way to a user to the docker group? Through the GUI it does not work and sudo usermod -aG also gives an error.

[LarsR]

Docker compose permission denied

I don’t think there is a “TrueNAS supported” way of making it work. But you can always add the user to the docker group manually: sudo gpasswd -a "$USER" docker Note: This only affects new ssh sessions. After that you can execute docker without sudo. Might break after a reboot and/or update, but can probably be added to a init script if really required. Edit: For completness, to remove the user from the docker group: sudo gpasswd -d "$USER" docker

[coyote]

same error as with usermod: [sss_cache] [confdb_init] (0x0010): Unable to open config database [/var/run/sssd-cache/db/config.ldb]
Could not open available domains
[sss_cache] [confdb_init] (0x0010): Unable to open config database [/var/run/sssd-cache/db/config.ldb]
Could not open available domains

[EloiBermejo]

I remembered I had added users to the docker group, so I backtracked and confirmed that you can add users to the docker group directly in the UI, as long as you add it as the users Primary group. Adding Docker as a secondary group is not accepted.

IMHO this is at least an interface inconsistency and most probably a bug, unless there is a solid reason to block users from adding container users to this group.

My knowledge in this topic is very superficial, but AFAIK adding the container user to the docker group is the recommended way for containers not running as root. Or should adding the user to the Apps group in TrueNAS be the recommended replacement in this case?