** Description changed:
[ Impact ]
* Older versions of Masakari are lacking a proper mechanism to prevent
concurrent record inserts into the database, resulting duplicated
event processing that can potentially lead to disastrous outcomes.
+ These include simultanious server migration attempts due to duplicated
+ host notifications that can cause failures and database inconsistencies
+ which are not always easy to fix.
* Affected versios include:
- - Focal/Ussuri 9.0.0-0ubuntu0.20.04.5 / 9.0.0-0ubuntu0.20.04.5~cloud0 (UCA)
+ - Focal/Ussuri 9.0.0-0ubuntu0.20.04.5 / 9.0.0-0ubuntu0.20.04.5~cloud0
(UCA) (Won't Fix - Code too old)
- Jammy/Yoga 13.0.0-0ubuntu1 / 13.0.0-0ubuntu1~cloud0 (UCA)
- Jammy/Caracal 17.0.0-0ubuntu1 / 17.0.0-0ubuntu1~cloud0 (UCA)
- Noble 17.0.0-0ubuntu1
- Resolute 21.0.0-0ubuntu1
- Stonking 21.0.0-0ubuntu1
* This is a known issue and reported by many users also presented in
LP#2028450.
* This requires an HA Masakari deployment without a coordinator
configured.
* None of the current Charmed Masakari deployments support using a
coordinator and are all affected.
[ Test Plan ]
* Testing requires an OpenStack environment deployed with HA Masakari.
Masakari deployed in HA mode is a hard requirement as the issue only
affects HA deployments due to workers competing with each other.
- * Juju bundles will be crafted and attached to this SRU bug to make
- reproducer deployments easier. The plan is to cover all affected
- versions. Detailed instructions will be provided.
-
* The LP#2028450 bug includes a reproducer script (2), which is handy
to reproduce the issue as well as validate the fix.
* The reproducer script simulates concurrent insertion situations
using OpenStack CLI.
+
+ * After running the reproducer script, execute the following command:
+
+ openstack notification list --sort-column generated_time --insecure | tail -n
30
+
+ * Bad Case: Look for COMPUTE_HOST entries that have close timestamps and pay
attention
+ to the state column. The following is an example of a problematic state
with
+ two entires created with close proximity affecting the same host and both
+ and not ignored:
+
+ | 9a06d57e-4fb3-4d44-bea3-c3d6f5ee3ea8 | 2026-04-22T17:41:47.000000 |
finished | COMPUTE_HOST | 1cb67d44-4a3f-4855-bf3e-960aec3aa079
+ | 60075e3c-1d85-4825-86d6-071d345a98fb | 2026-04-22T17:41:47.000000 |
finished | COMPUTE_HOST | 1cb67d44-4a3f-4855-bf3e-960aec3aa079
+
+ * Good Case: There should not be duplicated entries with a close proximity:
+
+ | 06a5422f-0ea6-46a1-b6b7-a171158f7b57 | 2026-04-22T18:00:47.000000 |
finished | COMPUTE_HOST | 1cb67d44-4a3f-4855-bf3e-960aec3aa079
+
[ Where problems could occur ]
* The nature if this change is very simple. In the HA API, the
create notification function will be modified to introduce an
artificial pause, significantly reducing the chance of
concurrent insertion if event records in database.
This will only be invoked if coordination back-end is not
configured. Please see (3) for more details:
if not CONF.coordination.backend_url:
time.sleep(random.uniform(1, 5))
* The probable risk here is a delay between 1-5 seconds during
event creation and further processing. These events happen
for example when a compute node becomes inaccessible and the
instances need to be evacuated and launched on a new node.
In other words the recovery will be delayed for 1-5 seconds.
[ Other Info ]
- * There is currently an effort to merge this change upstream (4).
+ * The proposed changes have been merged upstream (4).
(1) https://bugs.launchpad.net/masakari/+bug/2028450
(2) https://launchpadlibrarian.net/849768758/lp2028450-reproducer.bash
(3)
https://review.opendev.org/c/openstack/masakari/+/978343/3/masakari/ha/api.py
(4) https://review.opendev.org/c/openstack/masakari/+/978343
** Changed in: cloud-archive/dalmatian
Importance: Undecided => High
** Changed in: cloud-archive/dalmatian
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/2146964
Title:
[SRU] Prevent masakari HA from creating duplicated notifications
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