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(https://stackoverflow.co/labs/)   Learn more about Labs   (https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-icon.png?v=c78bd457575a) (/questions/60056354/docker-compose-group-add-works-with-group-id-but-not-with-group-name) docker-compose: group_add works with group id but not with group name  (/questions/ask) Ask Question     (2020-02-04 11:25:22Z) Asked 4 years, 7 months ago  Modified (?lastactivity) (2020-04-11 17:34:29Z) 4 years, 4 months ago  (Viewed 20,970 times) Viewed 21k times         This question shows research effort; it is useful and clear  (70:3:31e,16:7e1ee02312e82c72,10:1725174525,16:9a045d8da4fe5119,8:60056354,477d922ffc8266e25ce9a5a6f7583e4347338db920ca835cafdc2f97b68c2000) 10  (This question does not show any research effort; it is unclear or not useful)    (70:3:31e,16:7385be84f0f66760,10:1725174525,16:528026660e6a6098,8:60056354,3b493ff7e17d69cff1d0d6a89f7dcb826ecf82f63e7493eb30ad8fd7e150a60d)      Save this question.  (/posts/60056354/timeline)    Show activity on this post.    I have a container that needs to run other containers at some point.  I use group_add to add my container's user to the host's docker user group.  This works fine if I set the group id, but not with the group name. Documentation says it should work with both (https://docs.docker.com/compose/compose-file/compose-file-v2/#group_add) https://docs.docker.com/compose/compose-file/compose-file-v2/#group_add . Any ideas on this issue ?  Here is a simplified version of my docker-compose file : version: '2.1' services: my-worker: image: workers/data-handler:1.0.2 volumes: - /var/run/docker.sock:/var/run/docker.sock group_add: - 994 #docker group id command: run    (/questions/tagged/docker) (show questions tagged 'docker') docker  (/questions/tagged/docker-compose) (show questions tagged 'docker-compose') docker-compose      (/q/60056354) (Short permalink to this question) Share  Share a link to this question     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/60056354/edit) () Improve this question  Follow (70:3:31e,16:c7957825d016d247,10:1725174525,16:4127eacde15f95a6,8:60056354,911634330c8deeb512db057f0760a4b8708763c126ad1e61b02ce0c12ceaaf8e)  Follow this question to receive notifications       asked (2020-02-04 11:25:22Z) Feb 4, 2020 at 11:25   (/users/5554666/rafik-saad) (Rafik Saad's user avatar)    (/users/5554666/rafik-saad) Rafik Saad Rafik Saad (reputation score) 626 (1 gold badge)  1  1 gold badge (5 silver badges)  5  5 silver badges (10 bronze badges)  10  10 bronze badges           (Use comments to ask for more information or suggest improvements. Avoid answering questions in comments.) Add a comment |  (Expand to show all comments on this post)          1 Answer 1   Sorted by:  (/questions/60056354/docker-compose-group-add-works-with-group-id-but-not-with-group-name?answertab=scoredesc#tab-top) Reset to default   (scoredesc) Highest score (default)  (trending) Trending (recent votes count more)  (modifieddesc) Date modified (newest first)  (createdasc) Date created (oldest first)            This answer is useful  (70:3:31e,16:870135ad374dd939,10:1725174525,16:e63abaa08e3a4dbc,8:61160992,94f9fd8daa0c3d553fa6ac800d242df1fe186c634d446e94fa50e8da90d14430) 3  (This answer is not useful)    (70:3:31e,16:a698ce714360b07f,10:1725174525,16:c1b8e4e049cc0f24,8:61160992,a829f01f8d67f1d02a41ca002d48a152b95b56880fe590916609c1875b4576dd)      Save this answer.  (Loading when this answer was accepted…)     (/posts/61160992/timeline)    Show activity on this post.    It is likely that the docker group inside the image does not have the same group id as the host. Check the group id of docker inside the container: $ getent group docker | cut -d: -f3   When you use group_add: docker it looks up the docker group inside the container, so your user won't have the right permissions. Since you are mounting the docker.sock file, it will use the host permissions (including ids), so you need to provide the correct id. I have not got this to work in my environment in a workable fashion and resorted to a shell script instead of docker-compose since it worked in my use case and I am not using the extra functionality docker-compose provides. #!/bin/bash DOCKER_GROUP=$(getent group docker | cut -d: -f3) docker run \ -v /var/run/docker.sock:/var/run/docker.sock \ --group-add $DOCKER_GROUP \ workers/data-handler:1.0.2     (/a/61160992) (Short permalink to this answer) Share  Share a link to this answer     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/61160992/edit) () Improve this answer  Follow (70:3:31e,16:529c411d9fddd537,10:1725174525,16:a317b3cb1a7341d9,8:61160992,6b9ae7ae7d0a7082865b250286d8c75553a78c657bbce32e8209fb71c034c11d)  Follow this answer to receive notifications       answered (2020-04-11 17:34:29Z) Apr 11, 2020 at 17:34   (/users/2721883/clcto) (clcto's user avatar)    (/users/2721883/clcto) clcto clcto (reputation score) 9,598 (22 silver badges)  22  22 silver badges (42 bronze badges)  42  42 bronze badges        2   The docker group gid inside the container should be irrelevant according to the docker run documentation (unless there's a bug in a corner case when --group-add=name conflicts with an existing name inside the container and it silently ignores the command).  The official Docker documentation shows that --group-add=docker will lookup the GID on the host, and map that thru to the same GID inside the container and grant the executing container user membership in that group regardless of whether the host group is specified by name or explicit GID. – (/users/388082/mtalexan) (713 reputation) mtalexan  Commented (2023-12-13 14:41:18Z, License: CC BY-SA 4.0) Dec 13, 2023 at 14:41      (number of 'useful comment' votes received) 2   @mtalexan could you point me to the documentation? I didn't see that level of detail on the (https://docs.docker.com/engine/reference/run/#additional-groups) docker run reference page . Maybe this has been functionality has been added in the last 2 and half years, and I will try to see if I can reproduce with latest docker I have installed. – (/users/2721883/clcto) (9,598 reputation) clcto  Commented (2023-12-13 21:17:55Z, License: CC BY-SA 4.0) Dec 13, 2023 at 21:17        (Use comments to ask for more information or suggest improvements. Avoid comments like “+1” or “thanks”.) Add a comment |  (Expand to show all comments on this post)          (60056354) (false) () Your Answer                                 Reminder: Answers generated by artificial intelligence tools are not allowed on Stack Overflow. (/help/gen-ai-policy) Learn more       (true)       Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question . Provide details and share your research!  But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience.  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