[RFE] Multiple callback URLs in IPA

[Dmitry Tantsur]

TL;DR support a list of URLs for ipa-api-url and ipa-inspection-callback-url.

The most obvious use case for this are dual-stack environments where some nodes only have access to one IP stack. We already support per-node external_http_url for a similar reason. This feature is probably also useful for load-balancing/HA.

The agent will probe all URLs in the order they are defined and pick the first usable one.

[Jay Faulkner (jason-oldos)]

Approved in Dec 11 2023 meeting.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/ironic-python-agent/+/903999

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/ironic-python-agent/+/903999
Committed: https://opendev.org/openstack/ironic-python-agent/commit/0d4ae976c2ecf843ffc5fc9f76c98910a774708c
Submitter: "Zuul (22348)"
Branch: master

commit 0d4ae976c2ecf843ffc5fc9f76c98910a774708c
Author: Dmitry Tantsur <email address hidden>
Date: Wed Dec 13 16:44:49 2023 +0100

    Support several API and Inspector URLs

    Allows nodes with a single IP stack to be deployed from a dual-stack
    Ironic.

    Detecting advertised address and usable Ironic URLs are done completely
    independently which does open some space for a misconfiguration. I hope
    it's not likely in the reality, especially since this feature is
    targetting advanced standalone users.

    Change-Id: Ifa506c58caebe00b37167d329b81c166cdb323f2
    Closes-Bug: #2045548

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ironic-python-agent 9.9.0 release.