Building image with own UID=xxxxxx and GID =100

[Nguimjeu]

Because of non-matching UID/GID between host system and the wodby/php image, I'm trying to build my own image (for development purposes). The build process however fails when trying to delete the group the I gave as parameter. Here the details:

My en_make file.

// ./en_make

PHP_VER=8.1.10
PHP_DEV=1
WODBY_USER_ID=1853894834
WODBY_GROUP_ID=100

The WODBY_USER_ID and WODBY_GROUP_ID correspond to the UID and primary GID of my user on the host system.

The command I use to launch the build process.

$ make buildx-build-amd64

Build output with error message (truncated):

docker buildx build --platform linux/amd64 -t wodby/php:8.1-dev \
        --build-arg PHP_VER=8.1.10 \
        --build-arg PHP_DEV=1 \
        --build-arg WODBY_USER_ID=1853894834 \
        --build-arg WODBY_GROUP_ID=100 \
        --build-arg PECL_HTTP_PROXY="" \
        --load \
        ./
[+] Building 2.5s (6/10)                                                                                                                                                                                                         
 => [internal] load build definition from Dockerfile   

...
 => ERROR [2/6] RUN set -xe;         existing_group=$(getent group "${WODBY_GROUP_ID}" | cut -d: -f1); ...

...

#0 0.603 + getent group 100
#0 0.604 + cut -d: -f1
#0 0.604 + existing_group=users
#0 0.604 + '[[' -n users ]]
#0 0.605 + delgroup users
#0 0.605 delgroup: 'guest' still has 'users' as their primary group!

...

make: *** [Makefile:55: buildx-build-amd64] Error 1

If I'm not wrong, the build process fails because it is trying to delete the group with id 100.

Question:

While the user on my host system belongs to other groups that I can use for the build process, is it possible, instead of trying to delete the group, to add the user to the existing group in the docker image?

[csandanov]

well, it's definitely possible :)

but do you really need it? isn't matching uid sufficient for dev purposes?

[Nguimjeu]

well, it's definitely possible :)

but do you really need it? isn't matching uid sufficient for dev purposes?

Hey thanks for looking into it.
TBH, up until now, using a group ID other than the primary host GID to create the user in the container has not made problems. I may be a little bit obsessed :-D about having UID/GID to match between host and container, as it looks more "seamless". To visualize a bit, here is example oupt of directory listing that I currently have:

λ ls -la
total 716
drwxrwxr-x 14 johndoe php linux vdi users      4096 Sep 20 11:56 .
drwxr-xr-x  6 johndoe users                    4096 Sep  6 11:36 ..
-rwxrwxr-x  1 johndoe users                    6225 Sep  8 15:21 composer.json
-rwxr-xr-x  1 johndoe users                  532263 Sep  8 15:21 composer.lock
drwxrwxr-x  3 johndoe users                    4096 Jun 30 15:28 config
-rw-r--r--  1 johndoe users                   11878 Sep  7 11:55 docker-compose.yml
-rw-r--r--  1 johndoe users                       5 Sep  7 11:55 .dockerignore
-rw-r--r--  1 johndoe users                    2926 Sep  7 11:55 docker.mk
drwxrwxr-x  4 johndoe users                    4096 Sep  7 11:55 drush
-rwxrwxr-x  1 johndoe php linux developer       357 Jun 30 15:34 .editorconfig         // <--- created/modified in wodby container
-rwxrwxr-x  1 johndoe users                    2938 Sep 20 11:56 .env
-rw-r--r--  1 johndoe users                    2724 Sep  7 11:55 .env.dist
drwxrwxr-x  8 johndoe users                    4096 Sep 14 12:55 .git
-rwxrwxr-x  1 johndoe php linux developer      3858 Jun 30 15:34 .gitattributes        // <--- created/modified in wodby container
-rw-r--r--  1 johndoe users                     893 Sep  7 11:55 .gitignore
drwxrwxr-x  3 johndoe users                    4096 Sep 22 09:46 .idea
-rw-r--r--  1 johndoe users                     391 Sep  7 11:55 load.environment.php
-rw-r--r--  1 johndoe users                     128 Sep  7 11:55 Makefile
-rwxrwxr-x  1 johndoe users                    1837 Jul  5 09:15 phpunit.xml
-rw-r--r--  1 johndoe users                    1692 Sep  7 11:55 phpunit.xml.dist
-rw-r--r--  1 johndoe users                    7897 Sep  7 11:55 README.md
drwxrwxr-x  7 johndoe users                    4096 Jul 14 09:26 tests
drwxrwxr-x 64 johndoe php linux developer      4096 Sep  8 15:21 vendor               // <--- created/modified in wodby container
drwxrwxr-x  8 johndoe users                    4096 Sep  8 11:01 web