traceback from postinst on upgrade

Status changed to 'Confirmed' because the bug affects multiple users.

Hello Steve, thanks for reporting this.
Could you please send us a copy of /var/log/ubuntu-advantage.log so the team can take a look on what is happening?
Thanks.

Hi Steve, I am also trying to reproduce this issue but so far I am unable to reproduce it using a clean lxd focal VM with ubuntu-advantage-tools version 27.3 installed by default. I tried running upgrade with a machine attached and unattached but still no failure prompts were generated.

Was there any config changes applied to the machine before the upgrade ?

Here is the complete /var/log/ubuntu-advantage.log from this system:

2021-11-13 05:42:15,532 - upgrade_lts_contract.py:(49) [DEBUG]: Check whether to upgrade-lts-contract
2021-11-13 05:42:15,533 - config.py:(959) [DEBUG]: Using UA client configuration file at /etc/ubuntu-advantage/uaclient.conf
2021-11-13 05:42:15,534 - util.py:(425) [DEBUG]: Reading file: /etc/ubuntu-advantage/uaclient.conf
2021-11-13 05:42:15,553 - util.py:(425) [DEBUG]: Reading file: /var/lib/ubuntu-advantage/private/machine-token.json
2021-11-13 05:42:15,553 - config.py:(508) [DEBUG]: File does not exist: /var/lib/ubuntu-advantage/private/machine-token.json
2021-11-13 05:42:15,554 - upgrade_lts_contract.py:(51) [DEBUG]: Skiping upgrade-lts-contract. Machine is unattached

There were no configuration changes made prior to upgrading. Note that this is an armhf system, so AFAIK no UA services are available for it anyawy.

Unrelated, 'Skiping' should be spelled 'Skipping' in the log ;)

If I modify the postinst with set -x, I'm able to see that the traceback is from this:

+ /usr/bin/python3 -c
import os
import json
from uaclient.config import UAConfig
cfg = UAConfig()
status = cfg.read_cache('status-cache')
if status:
    for service in status['services']:
       if service['name'] == 'esm-apps':
           print(service['status'])

Traceback (most recent call last):
  File "<string>", line 10, in <module>
KeyError: 'status'

Thanks for the information, Steve.
Indeed, this is a bug happening on arm, aarch64 and possibly other architectures.

There is a PR up to fix it: https://github.com/canonical/ubuntu-advantage-client/pull/1891

Hi everyone,
i followed your thread and
i've the same error as reported above on my Raspberry Pi 4 with ubuntu server 20.04.
Now I can confirm that the above pull request solved the (and my) problem!
I changed the package on my system, applied the patch/fix manual with the GitHub PullRequest fix and my install worked!!!.
So please merge the GH PR and everything will be fine.

Here's my steps and output:

root:/# cp /var/cache/apt/archives/ubuntu-advantage-tools_27.4.1~20.04.1_arm64.deb /usr/src
root:/usr/src# cd /usr/src
root:/usr/src# mkdir ubuntu-advantage-tools
root:/usr/src# dpkg-deb -R ubuntu-advantage-tools_27.4.1~20.04.1_arm64.deb ubuntu-advantage-tools
root:/usr/src# vi ubuntu-advantage-tools/DEBIAN/postinst. #applied changed from GitHub pr to file
root:/usr/src# dpkg-deb -b ubuntu-advantage-tools ubuntu-advantage-tools_27.4.1-fix~20.04.1_arm64.deb
root:/usr/src# dpkg -i ubuntu-advantage-tools_27.4.1-fix~20.04.1_arm64.deb
(Lese Datenbank ... 162018 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von ubuntu-advantage-tools_27.4.1-fix~20.04.1_arm64.deb ...
Entpacken von ubuntu-advantage-tools (27.4.1~20.04.1) über (27.4.1~20.04.1) ...
ubuntu-advantage-tools (27.4.1~20.04.1) wird eingerichtet ...
Trigger für man-db (2.9.1-1) werden verarbeitet ...
root:/usr/src#

Hi Steve and Oli, we have landed the fix on main we will soon release it.
Thanks for reporting this issue and providing the additional context for it

This bug was fixed in the package ubuntu-advantage-tools - 27.4.2~22.04.1

---------------
ubuntu-advantage-tools (27.4.2~22.04.1) jammy; urgency=medium

  * d/tools.postinst:
    - Fix check_service_is_enabled function when the machine is
      unattached (LP: #1951705)

 -- Lucas Moura <email address hidden> Tue, 23 Nov 2021 09:20:56 -0300

Hello Steve, or anyone else affected,

Accepted ubuntu-advantage-tools into impish-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/27.4.2~21.10.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-impish to verification-done-impish. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-impish. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Hello Steve, or anyone else affected,

Accepted ubuntu-advantage-tools into hirsute-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/27.4.2~21.04.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-hirsute to verification-done-hirsute. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-hirsute. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Hello Steve, or anyone else affected,

Accepted ubuntu-advantage-tools into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/27.4.2~20.04.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Hello Steve, or anyone else affected,

Accepted ubuntu-advantage-tools into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/27.4.2~18.04.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Hello Steve, or anyone else affected,

Accepted ubuntu-advantage-tools into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/27.4.2~16.04.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Here is the results of our tests for this issue on release 27.4.2
Note that this issue should only affect LTS releases, which can be verified on the hirsute and impish tests.

we have also appended the test script we have used to generate those results

This bug was fixed in the package ubuntu-advantage-tools - 27.4.2~21.10.1

---------------
ubuntu-advantage-tools (27.4.2~21.10.1) impish; urgency=medium

  * Backport new upstream release: (LP: #1951705) to impish

ubuntu-advantage-tools (27.4.2~22.04.1) jammy; urgency=medium

  * d/tools.postinst:
    - Fix check_service_is_enabled function when the machine is
      unattached (LP: #1951705)

 -- Lucas Moura <email address hidden> Tue, 23 Nov 2021 16:19:26 -0300

The verification of the Stable Release Update for ubuntu-advantage-tools has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

This bug was fixed in the package ubuntu-advantage-tools - 27.4.2~21.04.1

---------------
ubuntu-advantage-tools (27.4.2~21.04.1) hirsute; urgency=medium

  * Backport new upstream release: (LP: #1951705) to hirsute

ubuntu-advantage-tools (27.4.2~22.04.1) jammy; urgency=medium

  * d/tools.postinst:
    - Fix check_service_is_enabled function when the machine is
      unattached (LP: #1951705)

 -- Lucas Moura <email address hidden> Tue, 23 Nov 2021 16:19:17 -0300

This bug was fixed in the package ubuntu-advantage-tools - 27.4.2~20.04.1

---------------
ubuntu-advantage-tools (27.4.2~20.04.1) focal; urgency=medium

  * Backport new upstream release: (LP: #1951705) to focal

ubuntu-advantage-tools (27.4.2~22.04.1) jammy; urgency=medium

  * d/tools.postinst:
    - Fix check_service_is_enabled function when the machine is
      unattached (LP: #1951705)

 -- Lucas Moura <email address hidden> Tue, 23 Nov 2021 16:19:09 -0300

This bug was fixed in the package ubuntu-advantage-tools - 27.4.2~18.04.1

---------------
ubuntu-advantage-tools (27.4.2~18.04.1) bionic; urgency=medium

  * Backport new upstream release: (LP: #1951705) to bionic

ubuntu-advantage-tools (27.4.2~22.04.1) jammy; urgency=medium

  * d/tools.postinst:
    - Fix check_service_is_enabled function when the machine is
      unattached (LP: #1951705)

 -- Lucas Moura <email address hidden> Tue, 23 Nov 2021 16:19:00 -0300

I assume this also was meant to go to xenial-updates, even though xenial is in ESM mode now.

This bug was fixed in the package ubuntu-advantage-tools - 27.4.2~16.04.1

---------------
ubuntu-advantage-tools (27.4.2~16.04.1) xenial; urgency=medium

  * Backport new upstream release: (LP: #1951705) to xenial

ubuntu-advantage-tools (27.4.2~22.04.1) jammy; urgency=medium

  * d/tools.postinst:
    - Fix check_service_is_enabled function when the machine is
      unattached (LP: #1951705)

 -- Lucas Moura <email address hidden> Tue, 23 Nov 2021 16:18:47 -0300