Is user ubuntu with uid:gid=1000:1000 bug or a feature?

[incebellipipo]

I recently realized that rolling and jazzy images have a user with username ubuntu:

ubuntu:x:1000:1000:Ubuntu:/home/ubuntu:/bin/bash

When I run on the following on a amd64 machine

for v in rolling jazzy iron humble galactic foxy eloquent dashing
do 
     echo "❔checking $v";
     docker run -q --rm ros:$v-ros-base /bin/bash -c "getent passwd 1000" \
     && echo "✅ UID 1000 found in $v"\
     || echo "❌ UID 1000 not found in $v";
done

I get:

❔checking rolling
ubuntu:x:1000:1000:Ubuntu:/home/ubuntu:/bin/bash
✅ UID 1000 found in rolling
❔checking jazzy
ubuntu:x:1000:1000:Ubuntu:/home/ubuntu:/bin/bash
✅ UID 1000 found in jazzy
❔checking iron
❌ UID 1000 not found in iron
❔checking humble
❌ UID 1000 not found in humble
❔checking galactic
❌ UID 1000 not found in galactic
❔checking foxy
❌ UID 1000 not found in foxy
❔checking eloquent
❌ UID 1000 not found in eloquent
❔checking dashing
❌ UID 1000 not found in dashing

So my question for it now is:

• Is it an artifact carried over from respective ubuntu docker image?
• Will it be the standard moving forward?
• Is it a bug?

[moriarty]

This is coming from a change in the underlying ubuntu:24.04 image, which now includes a default user ubuntu by default.

[incebellipipo]

I saw that it was intentionally added to standardize non-root user.

See relevant thread:
https://bugs.launchpad.net/cloud-images/+bug/2005129/comments/1

Closing: unrelated with OSRF docker images.

[ruffsl]

Indeed, this change is from upstream, requiring me to adjust my dev container setup:

• https://askubuntu.com/questions/1513927/ubuntu-24-04-docker-images-now-includes-user-ubuntu-with-uid-gid-1000