STX | Unexpected failure of live migration

[Danilo]

Brief Description
-----------------
Some VMs are failing to perform a live migration with no apparent error, on nova migration list it just states "error"

Severity
--------
Minor: System/Feature is usable with minor issue

Steps to Reproduce
------------------
1. Create a VM
2. Try to live migrate it

Expected Behavior
-----------------
Live migration is successful

Actual Behavior
---------------
Live migration fails

Reproducibility
---------------
Reproducible 100%

System Configuration
--------------------
Two node system

Load Information
----------------
STX master 2023-08-04_20:01:38
STX-O master 2023-08-08 15:47:08

Last Pass
2023-07-11_13:06

Timestamp/Logs
--------------
[2023-08-08 14:46:13,713] 350 DEBUG MainThread ssh.send :: Send 'nova --os-username 'admin' --os-password 'Li69nux*' --os-project-name admin --os-auth-url http://keystone.openstack.svc.cluster.local/v3 --os-user-domain-name Default --os-project-domain-name Default --os-endpoint-type internalURL --os-region-name RegionOne migration-list'
[2023-08-08 14:46:13,763] 552 DEBUG MainThread ssh.exec_cmd:: Expecting .*controller\-[01][:| ].*\$ in prompt
[2023-08-08 14:46:16,998] 472 DEBUG MainThread ssh.expect :: Output:
+----+--------------------------------------+--------------+--------------+----------------+--------------+---------------+--------+--------------------------------------+------------+------------+----------------------------+----------------------------+----------------+----------------------------------+----------------------------------+
| Id | UUID | Source Node | Dest Node | Source Compute | Dest Compute | Dest Host | Status | Instance UUID | Old Flavor | New Flavor | Created At | Updated At | Type | Project ID | User ID |
+----+--------------------------------------+--------------+--------------+----------------+--------------+---------------+--------+--------------------------------------+------------+------------+----------------------------+----------------------------+----------------+----------------------------------+----------------------------------+
| 2 | d1ad5ce1-5d18-4f87-9f1b-7f331b80d532 | controller-0 | controller-1 | controller-0 | controller-1 | 192.168.206.3 | error | b1af3a7d-a39a-452c-a034-406c2ddd6138 | 22 | 22 | 2023-08-08T14:42:46.000000 | 2023-08-08T14:45:07.000000 | live-migration | b4a5f977138c4fef960c572b035f87a2 | bea9842577664d65832f142c4e733a13 |
+----+--------------------------------------+--------------+--------------+----------------+--------------+---------------+--------+--------------------------------------+------------+------------+----------------------------+----------------------------+----------------+----------------------------------+----------------------------------+
]0;sysadmin@controller-0: ~sysadmin@controller-0:~$

Alarms
------
N/A

Test Activity
-------------
Sanity Testing

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

[Thales Elero Cervi (tcervi)]

Removing the stx.9.0 tag based on latest Sanity execution report: https://<email address hidden>/thread/UFXM4FQSC66K5YGSYMZVHB4DE4A4JN6O/

Danilo, I am closing this Launchpad since it is no longer reproducible.
If needed, it can be re-open later and the fix will have to be planned for next StarlingX release.