Thanks for the (very helpful) pointers, Tianon. So, here is a summary of the issue:
- docker changed the format of the docker save command output to be OCI compliant in https://github.com/moby/moby/pull/44598, as pointed out by Tianon. - launchpad-buildd does a lot of processing in the tarball generated by docker save in .lpbuildd/oci.py, which heavily relies on the old format (See https://git.launchpad.net/launchpad-buildd/tree/lpbuildd/oci.py#n149). - The culprit for the error is the `finally` block in that method which assumes at least one `*layer.tar` file would be present in the image, which is no longer true, hence, it raises an error. - The fix is not simple though: if we simply check for that `fileobj` variable in the `finally` block before trying to close the file, we will still not have the proper results from the `gatherResults` method. The whole method will need to be refactored to correctly process the new archive format. As per our Docker policy described in https://wiki.ubuntu.com/DockerUpdates, I am unsure if we should revert the changes ATM. I suppose the proper way forward here is to adjust launchpad-buildd to be able to parse the new docker save output format. In the meanwhile, we may still need a temporary solution to fix the OCI builders. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2098106 Title: Launchpad OCI builds are failing after the docker.io-app SRU update to 26.x on Focal To manage notifications about this bug go to: https://bugs.launchpad.net/launchpad/+bug/2098106/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
