grub-pc 2.04-1ubuntu29 fails to install on groovy 20.10 due to pkg deps conflict

[Sean Feole]

Series: Groovy
Arch: AMD64

When attempting to deploy Groovy AMD64 images via MAAS, the deployment is failing due to curtin attempting to install grub-pc (2.04-1ubuntu29 ) which fails to install due to a depends issue noted below.

This has essentially broken all maas deployments at least on Groovy AMD64 at this time.

        Setting up linux-generic (5.8.0.16.18) ...
        Setting up grub-pc (2.04-1ubuntu29) ...

        Creating config file /etc/default/grub with new version
        dpkg: error processing package grub-pc (--configure):
         installed grub-pc package post-installation script subprocess returned error exit status 1
        dpkg: dependency problems prevent configuration of grub-gfxpayload-lists:
         grub-gfxpayload-lists depends on grub-pc (>= 1.99~20101210-1ubuntu2); however:
          Package grub-pc is not configured yet.

        dpkg: error processing package grub-gfxpayload-lists (--configure):
         dependency problems - leaving unconfigured
        Processing triggers for dbus (1.12.18-1ubuntu1) ...
        Processing triggers for install-info (6.7.0.dfsg.2-5) ...
        No apport report written because the error message indicates its a followup error from a previous failure.
        Processing triggers for libc-bin (2.31-0ubuntu10) ...
        Processing triggers for systemd (246.2-1ubuntu1) ...
        Running in chroot, ignoring command 'daemon-reload'
        Processing triggers for man-db (2.9.3-2) ...
        Processing triggers for linux-image-5.8.0-16-generic (5.8.0-16.17) ...
        Errors were encountered while processing:
         grub-pc
         grub-gfxpayload-lists
        E: Sub-process /usr/bin/dpkg returned an error code (1)
        Running command ['udevadm', 'settle'] with allowed return codes [0] (capture=False)
        TIMED subp(['udevadm', 'settle']): 0.050
        Running command ['umount', '/tmp/tmpu39p2api/target/sys'] with allowed return codes [0] (capture=False)
        Running command ['umount', '/tmp/tmpu39p2api/target/run'] with allowed return codes [0] (capture=False)
        Running command ['umount', '/tmp/tmpu39p2api/target/proc'] with allowed return codes [0] (capture=False)
        Running command ['umount', '/tmp/tmpu39p2api/target/dev'] with allowed return codes [0] (capture=False)
        finish: cmd-install/stage-curthooks/builtin/cmd-curthooks/installing-kernel: FAIL: installing kernel
        finish: cmd-install/stage-curthooks/builtin/cmd-curthooks: FAIL: curtin command curthooks
        Traceback (most recent call last):
          File "/curtin/curtin/commands/main.py", line 202, in main
            ret = args.func(args)
          File "/curtin/curtin/commands/curthooks.py", line 1770, in curthooks
            builtin_curthooks(cfg, target, state)
          File "/curtin/curtin/commands/curthooks.py", line 1613, in builtin_curthooks
            install_kernel(cfg, target)
          File "/curtin/curtin/commands/curthooks.py", line 371, in install_kernel
            distro.install_packages([kernel_package], target=target)
          File "/curtin/curtin/distro.py", line 405, in install_packages
            return install_cmd('install', args=pkglist, opts=opts, target=target,
          File "/curtin/curtin/distro.py", line 292, in run_apt_command
            return inchroot.subp(cmd, env=env)
          File "/curtin/curtin/util.py", line 708, in subp
            return subp(*args, **kwargs)
          File "/curtin/curtin/util.py", line 275, in subp
            return _subp(*args, **kwargs)
          File "/curtin/curtin/util.py", line 139, in _subp
            raise ProcessExecutionError(stdout=out, stderr=err,
        curtin.util.ProcessExecutionError: Unexpected error while running command.
        Command: ['unshare', '--fork', '--pid', '--', 'chroot', '/tmp/tmpu39p2api/target', 'eatmydata', 'apt-get', '--quiet', '--assume-yes', '--option=Dpkg::options::=--force-unsafe-io', '--option=Dpkg::Options::=--force-confold', 'install', 'linux-generic']
        Exit code: 100
        Reason: -
        Stdout: ''
        Stderr: ''
        Unexpected error while running command.
        Command: ['unshare', '--fork', '--pid', '--', 'chroot', '/tmp/tmpu39p2api/target', 'eatmydata', 'apt-get', '--quiet', '--assume-yes', '--option=Dpkg::options::=--force-unsafe-io', '--option=Dpkg::Options::=--force-confold', 'install', 'linux-generic']
        Exit code: 100
        Reason: -
        Stdout: ''
        Stderr: ''

Stderr: ''

[Sean Feole (sfeole)]

So after looking around a bit it would appear there is another version of grub2 that has been uploaded to the builders. (Version 2.04-1ubuntu30)

https://launchpad.net/ubuntu/+source/grub2/2.04-1ubuntu30

Appears to have 2 fixes:

  * postinst.in: do not attempt to call grub-install upon fresh install of
    grub-pc because it it a job of installers to do that after fresh
    install.
  * grub-multi-install: fix non-interactive failures for grub-efi like it
    was fixed in postinst for grub-pc.

Not sure if this problem would be addressed in here, however the amd64 deb has failed to build and I have notified the appropriate xnoxx

[Po-Hsu Lin (cypressyew)]

Deployment now works on all different arches.
Thanks.