zuul pylint jobs failing in stx/fault

[Andy]

Brief Description
-----------------
Submissions to stx/fault that invoke the zuul pylint job are randomly failing.

Task Run tox failed running on host ubuntu-focal, and it's an invocation error "ERROR: InvocationError for command /home/zuul/src/opendev.org/starlingx/fault/.tox/pylint/bin/pylint --rcfile=./pylint.rc fm-api/fm_api fm-common/sources/fm_db_sync_event_suppression.py fm-rest-api/fm/fm python-fmclient/fmclient/fmclient (exited with code 6)"

This suggests a different zuul worker node is being used.

Run pylint locally passes.

Severity
--------
Major

Steps to Reproduce
------------------
Submit a 'safe' review that will trigger a zuul pylint job in stx/fault

Expected Behavior
------------------
Zuul should pass

Actual Behavior
----------------
Zuul randomly fails

Reproducibility
---------------
Intermittent

System Configuration
--------------------
N/A

Branch/Pull Time/Commit
-----------------------
stx latest.

Last Pass
---------
Unknown

Timestamp/Logs
--------------
Zuul log:
 Task
Run tox failed running on host ubuntu-focal

/home/zuul/.local/tox/bin/tox -epylint -vv

non-zero return code

......

-----------------------------------
Your code has been rated at 9.86/10

ERROR: InvocationError for command /home/zuul/src/opendev.org/starlingx/fault/.tox/pylint/bin/pylint --rcfile=./pylint.rc fm-api/fm_api fm-common/sources/fm_db_sync_event_suppression.py fm-rest-api/fm/fm python-fmclient/fmclient/fmclient (exited with code 6)
pylint finish: run-test after 17.82 seconds
pylint start: run-test-post
pylint finish: run-test-post after 0.00 seconds
___________________________________ summary ____________________________________
ERROR: pylint: commands failed

Test Activity
-------------
Uploading reviews

Workaround
----------
N/A

[Ghada Khalil (gkhalil)]

Screening: marking as stx.6.0 / high given this blocks code merges in the fault repo

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/fault/+/795434

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/fault/+/795434
Committed: https://opendev.org/starlingx/fault/commit/60f7cb230899f6960d57394453514a57690414ca
Submitter: "Zuul (22348)"
Branch: master

commit 60f7cb230899f6960d57394453514a57690414ca
Author: Andy Ning <email address hidden>
Date: Tue Jun 8 18:19:10 2021 -0400

    Fix zuul pylint failure on review

    For a review in stx/fault repo if pylint runs on ubuntu-focal,
    it'll fail with error "ERROR: InvocationError for command ...".
    This update fixed this by restricting pylint to run on
    the compatible ubuntu-bionic, as we do for stx/config repo.

    Closes-Bug: 1930919
    Signed-off-by: Andy Ning <email address hidden>
    Change-Id: I584e80d6286dbaf5439cbff593d0ad74da96ab77

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: f/centos8
Review: https://review.opendev.org/c/starlingx/fault/+/800519

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/fault/+/800519
Committed: https://opendev.org/starlingx/fault/commit/3106ff51a8778e95548d6bb02d23a72e609443da
Submitter: "Zuul (22348)"
Branch: f/centos8

commit 3106ff51a8778e95548d6bb02d23a72e609443da
Author: Andy Ning <email address hidden>
Date: Tue Jun 8 18:19:10 2021 -0400

    Fix zuul pylint failure on review

    For a review in stx/fault repo if pylint runs on ubuntu-focal,
    it'll fail with error "ERROR: InvocationError for command ...".
    This update fixed this by restricting pylint to run on
    the compatible ubuntu-bionic, as we do for stx/config repo.

    Closes-Bug: 1930919
    Signed-off-by: Andy Ning <email address hidden>
    Change-Id: I584e80d6286dbaf5439cbff593d0ad74da96ab77
    (cherry picked from commit 60f7cb230899f6960d57394453514a57690414ca)