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Bug 2179017 - cloud-init: backport fix for instance id detection on Azure to RHEL9 [rhel-9.3]
Summary: cloud-init: backport fix for instance id detection on Azure to RHEL9 [rhel-9.3]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: cloud-init
Version: unspecified
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Ani Sinha
QA Contact: Huijuan Zhao
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-03-16 12:59 UTC by Chris Patterson
Modified: 2023-11-07 09:27 UTC (History)
14 users (show)

Fixed In Version: cloud-init-23.1.1-1.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-11-07 08:28:38 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 2178793 0 unspecified CLOSED cloud-init: backport fix for instance id detection on Azure [rhel-8.9] 2023-11-14 16:43:13 UTC
Red Hat Issue Tracker RHELPLAN-152065 0 None None None 2023-03-16 13:01:11 UTC
Red Hat Product Errata RHSA-2023:6371 0 None None None 2023-11-07 08:29:29 UTC

Description Chris Patterson 2023-03-16 12:59:08 UTC 
Description of problem:
cloud-init may re-configure VM after falling back to non-Azure datasource on Azure.

Some error cases will cause the instance ID to fall back to a default value of "iid-datasource".  This will cause cloud-init to reconfigure the VM thinking it is a new instance.

Version-Release number of selected component (if applicable):
All cloud-init versions < 22.4

How reproducible:
The customer cases we have seen have been due to DHCP failures for various reasons (either due to image misconfiguration or platform issues).

Steps to Reproduce:
1. create RHEL VM on Azure
2. reboot # clean reboot for demonstration purposes
2. mv /usr/sbin/dhclient /usr/sbin/dhclient.x
2. cp /bin/false /usr/sbin/dhclient
3. reboot
4. grep config-users /var/log/cloud-init.log

We should see something like:

<First boot where provisioning runs config-users-groups>
2023-02-24 16:46:08,014 - handlers.py[DEBUG]: start: init-network/config-users-groups: running config-users-groups with frequency once-per-instance
2023-02-24 16:46:08,017 - helpers.py[DEBUG]: Running config-users-groups using lock (<FileLock using file '/var/lib/cloud/instances/05a707cf-665b-b547-8fd4-a88de9aa6215/sem/config_users_groups'>)
2023-02-24 16:46:09,851 - handlers.py[DEBUG]: finish: init-network/config-users-groups: SUCCESS: config-users-groups ran successfully

<Normal subsequent boot where config-users-groups does not run>
2023-03-15 15:14:03,278 - handlers.py[DEBUG]: start: init-network/config-users-groups: running config-users-groups with frequency once-per-instance
2023-03-15 15:14:03,279 - helpers.py[DEBUG]: config-users-groups already ran (freq=once-per-instance)
2023-03-15 15:14:03,279 - handlers.py[DEBUG]: finish: init-network/config-users-groups: SUCCESS: config-users-groups previously ran

<Boot with /bin/false for dhclient, config-users unexpectedly re-runs>
2023-03-15 17:30:49,484 - handlers.py[DEBUG]: start: init-network/config-users-groups: running config-users-groups with frequency once-per-instance
2023-03-15 17:30:49,487 - helpers.py[DEBUG]: Running config-users-groups using lock (<FileLock using file '/var/lib/cloud/instances/iid-datasource/sem/config_users_groups'>)
2023-03-15 17:30:49,491 - handlers.py[DEBUG]: finish: init-network/config-users-groups: SUCCESS: config-users-groups ran successfully

The upstream patch that should address this failure:
https://github.com/canonical/cloud-init/commit/b861ea8a5e1fd0eb33096f60f54eeff42d80d3bd
Comment 1 Ani Sinha 2023-03-30 10:04:19 UTC 
@huzhao will this be fixed by the cloud-init rebase https://bugzilla.redhat.com/show_bug.cgi?id=2172811 ?
Comment 2 Ani Sinha 2023-03-30 10:09:57 UTC 
Seems https://github.com/canonical/cloud-init/commit/b861ea8a5e1fd0eb33096f60f54eeff42d80d3bd is present in cloud-init 23.1.1
Comment 3 Huijuan Zhao 2023-03-30 22:37:32 UTC 
(In reply to Ani Sinha from comment #1)
> @huzhao will this be fixed by the cloud-init rebase
> https://bugzilla.redhat.com/show_bug.cgi?id=2172811 ?

Yes, I think so. 
Please refer to the https://bugzilla.redhat.com/show_bug.cgi?id=2178793#c14 for detail test results and discussion.
Comment 4 Ani Sinha 2023-04-28 08:20:22 UTC 
@huzhao Please feel free to close this bug as the rebase is complete.
Comment 5 Huijuan Zhao 2023-04-28 14:14:11 UTC 
(In reply to Ani Sinha from comment #4)
> @huzhao Please feel free to close this bug as the rebase is
> complete.

Thanks Ani. Should we add this BZ to errata or close it directly?
Comment 6 Ani Sinha 2023-04-28 15:04:57 UTC 
(In reply to Huijuan Zhao from comment #5)
> (In reply to Ani Sinha from comment #4)
> > @huzhao Please feel free to close this bug as the rebase is
> > complete.
> 
> Thanks Ani. Should we add this BZ to errata or close it directly?

I guess add it to errata
Comment 13 Huijuan Zhao 2023-05-24 09:57:20 UTC 
The issue is fixed in cloud-init-23.1.1-4.el9, test results are same as https://bugzilla.redhat.com/show_bug.cgi?id=2178793#c3

Moving to VERIFIED.
Comment 15 errata-xmlrpc 2023-11-07 08:28:38 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: cloud-init security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2023:6371
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