Public bug reported: Debian bug #968927 is present in the version of debootstrap in focal, which means that mk-sbuild cannot execute successfully within a Docker environment.
https://salsa.debian.org/installer- team/debootstrap/-/commit/87cdebbcad6f4e16ba711227cbbbd70039f88752 is the fix for this. It's included in the version of debootstrap in impish+, and we've been using a patched debootstrap (including only this patch on top of focal's debootstrap) for a couple of months without issue. [Impact] Without this patch, using debootstrap via mk-sbuild within a Docker environment produces this error: ln: failed to create symbolic link '/dev/stdin': File exists E: 10mount: E: Failed to open mount file ‘/proc/mounts’: No such file or directory E: focal-amd64-6433640d-7654-4238-b872-e8f1acd4b717: Chroot setup failed: stage=setup-stop This means that Ubuntu users either have to perform their mk-sbuild'ing outside of Docker (which may not be possible in corporate settings), or they have to maintain debootstrap downstream of Ubuntu (which either requires superseding the versions in Ubuntu entirely, or rebasing this patch onto the new version which appears in focal as each new release is opened). [Test Plan] Launch a Docker container (privileged so mk-sbuild can perform overlay mounting) with: docker run --privileged -it --rm ubuntu:focal and then within the container: apt-get update apt-get install ubuntu-dev-tools sbuild # Convince mk-sbuild to run as root touch /root/.sbuildrc usermod -a -G sbuild root newgrp sbuild # Run mk-sbuild mk-sbuild focal After much output, the above-described error will be output. Using a patched debootstrap causes the mk-sbuild to complete successfully. Regression testing of regular use of debootstrap (outside of Docker, as used in Ubuntu's image building) should be performed: the image content should be unchanged. [Where problems could occur] debootstrap is a fundamental piece of the Debian/Ubuntu image building infrastructure, and any change to it could have an impact on how Ubuntu images are built. ** Affects: debootstrap (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1948713 Title: focal: backport patch to allow mk-sbuild within Docker To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debootstrap/+bug/1948713/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
