[Bug 1715012] Re: Installing snapd can hide dpkg prompts and make it look like it's stuck

Andreas Hasenack andreas at canonical.com
Tue Sep 19 19:35:12 UTC 2017

** Description changed:

  The new upstream version has two changes only (https://github.com/CanonicalLtd/ubuntu-advantage-script/releases/tag/v9)
  - fix for this bug plus unit tests for it
  - test suite refactoring
  Were it not for the second change, I would not be asking for a Feature
- Freeze Exception. This second change split one big test python script
- into multiple modules, one per feature. That makes it easier to write
- new tests.
+ Freeze Exception (UPDATE: see comment #9). This second change split one
+ big test python script into multiple modules, one per feature. That
+ makes it easier to write new tests.
  That test refactoring alone incurred in this small change to the main script, to ease its unit testing:
  -SERIES=$(lsb_release -cs)
  +SERIES=${SERIES:-$(lsb_release -cs)}
  -KERNEL_VERSION=$(uname -r)
  These are the changes in the main script:
  And the full diff between the two releases:
  [Travis CI]
  Upstream has travis setup to test each landing branch:
  Those tests are using python 3.5, while artful has python 3.6. I have
  attached a test log run on artful and python 3.6.
  [PPA with daily builds]
  We also have a PPA setup with daily builds from a github mirror using a launchpad recipe: https://code.launchpad.net/~ahasenack/+recipe/ubuntu-advantage-script-daily
  Here is the v9 artful build:
  [Bugfix test]
  This package is meant for LTS releases only, so it doesn't do much in
  artful other than to say it's not supported there. But since we will
  want to SRU it to the LTS releases, attached is a log of the trusty
  upgrade and livepatch enabling, which is what this bug is about.
  From the upstream report at https://github.com/CanonicalLtd/ubuntu-
  I tried to enable livepatch on a trusty machine, but it got stuck:
  ubuntu at 61-b1:~$ sudo ubuntu-advantage enable-livepatch <redacted>
  Installing missing dependency snapd...
  Behind the scenes, what happened is that dpkg issued a prompt:
  2228 pts/0    S+     0:00  |           \_ sudo ubuntu-advantage enable-livepatch redacted
  2229 pts/0    S+     0:00  |               \_ /bin/sh -e /usr/bin/ubuntu-advantage enable-livepatch redacted
  2236 pts/0    S+     0:01  |                   \_ apt-get install -y snapd
  3269 pts/0    S+     0:00  |                       \_ /usr/bin/dpkg --status-fd 43 --configure liblzo2-2:amd64 libsystemd-journal0:amd64 linux-image-4.4.0-92-generic:amd64 linux-image-extra-4.4.0-92-generic:amd64 linux-image-generic-lts-xenial:amd64 linux-headers-4.4.0-92:all linux-headers-4.4.0-92-generic:amd64 linux-headers-generic-lts-xenial:amd64 linux-generic-lts-xenial:amd64 cgroup-lite:all squashfs-tools:amd64 systemd:amd64 snapd:amd64 thermald:amd64
  3278 pts/0    S+     0:00  |                           \_ /usr/bin/perl /var/lib/dpkg/info/linux-image-4.4.0-92-generic.postinst configure
  3304 pts/0    S+     0:00  |                               \_ run-parts --verbose --exit-on-error --arg=4.4.0-92-generic --arg=/boot/vmlinuz-4.4.0-92-generic /etc/kernel/postinst.d
  11905 pts/0    S+     0:00  |                                   \_ /usr/bin/perl -w /usr/share/debconf/frontend /usr/sbin/update-grub-legacy-ec2
  11911 pts/0    S+     0:00  |                                       \_ /bin/bash /usr/sbin/update-grub-legacy-ec2
  12312 pts/0    S+     0:00  |                                       |   \_ /bin/bash /usr/bin/ucf --debconf-ok --debconf-template grub/update_grub_changeprompt_threeway --three-way /tmp/filez4NBAU /var/run/grub/menu.lst
  12362 pts/0    S+     0:00  |                                       \_ whiptail --backtitle Package configuration --title  --output-fd 11 --nocancel --default-item keep the local version currently installed --menu A new version of /boot/grub/menu.lst is available, but the version installed currently has been locally modified.  What would you like to do about menu.lst? 17 118 7 -- install the package maintainer's version  keep the local version currently installed  show the differences between the versions  show a side-by-side difference between the versions  show a 3-way difference between available versions  do a 3-way merge between available versions (experimental)  start a new shell to examine the situation
  Hitting ENTER at the stuck screen accepted whatever was the default choice and moved on.
  Note that this can happen in any Ubuntu release, not just trusty.

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  Installing snapd can hide dpkg prompts and make it look like it's

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