octavia-dashboard uses an incorrect region in specific multi-region deployments

[Gregory Thiemonge]

when using a multi-region deployment with:
- a centralized keystone in region0 (with endpoints to the public services of all the regions)
- per region keystone instances in region[1-2] (with endpoint to the services of their own region)

(region0 has endpoints for octavia in region1 and 2, region1 has an endpoint for octavia in region1, region2 for octavia in region2)

octavia-dashboard may fail to connect to the octavia service because it uses an incorrect region

in

https://github.com/openstack/octavia-dashboard/blob/979ee7f213b1cfc5a447c2b838e701c7a1358530/octavia_dashboard/sdk_connection.py#L47

the connection to the service uses "auth_url=request.user.endpoint"

this request.user.endpoint variable appears to be the auth endpoint of the horizon session (it is set when the user connects to horizon), this endpoint is not updated when the user selects another region in the Projects/Regions selector.
So if the user connects to horizon through region1 and then selects region2, octavia-dashboard looks for the octavia endpoint for region2 in the region1 catalog, and it fails with an error like:

keystoneauth1.exceptions.catalog.EndpointNotFound: publicURL endpoint for load-balancer service in region2 region not found

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/octavia-dashboard/+/925672

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/octavia-dashboard/+/925672
Committed: https://opendev.org/openstack/octavia-dashboard/commit/0f59b0d164ee0bfe106189a2704c6bfd5626df7b
Submitter: "Zuul (22348)"
Branch: master

commit 0f59b0d164ee0bfe106189a2704c6bfd5626df7b
Author: Gregory Thiemonge <email address hidden>
Date: Mon Aug 5 04:41:00 2024 -0400

    Fixed incorrect region endpoint in multi-region

    When using multi-region, octavia-dashboard used the keystone catalog of
    auth endpoint linked to the horizon session. But it should use the
    keystone endpoint of the selected region if it exists.

    Closes-Bug: #2076074
    Change-Id: I8d90a7225361a88ebfd68e7f16724b302031eda6

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/2024.1
Review: https://review.opendev.org/c/openstack/octavia-dashboard/+/927267

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/2023.2
Review: https://review.opendev.org/c/openstack/octavia-dashboard/+/927269

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/2023.1
Review: https://review.opendev.org/c/openstack/octavia-dashboard/+/927270

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/octavia-dashboard 14.0.0.0rc1 release candidate.