Application Credential support

[Deydra71]

Jira: OSPRH-16629

Adds the end-to-end support for consuming Keystone ApplicationCredentials (AC) in the Placement operator, enabling Placement pods to use AC-based authentication when available.

API changes:

Adds an optional authentication field to the Placement CR:

spec.auth.applicationCredentialSecret — name of the Secret that contains the Keystone Application Credential ID and Secret (AC_ID and AC_SECRET).

Reconcile behavior:

Reads spec.auth.applicationCredentialSecret
Attempts to load AC_ID / AC_SECRET from the referenced Secret (via the Keystone helper).
If the secret is missing or incomplete, it falls back to password authentication (the AppCred auth is optional, not an error).

• Once the AC Secret is ready with valid AC_ID and AC_SECRET fields, templates AC credentials into Placement service configuration
• Computes hash of Secret contents and stores in configVars to trigger rolling updates when credentials rotate

Depends-On: openstack-k8s-operators/keystone-operator#567

[openshift-ci]

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[softwarefactory-project-zuul]

Merge Failed.

This change or one of its cross-repo dependencies was unable to be automatically merged with the current state of its repository. Please rebase the change and upload a new patchset.
Warning:
Error merging github.com/openstack-k8s-operators/keystone-operator for 567,560a7f552956fc9c80fece28fc7e7b01b59c2274

[mrkisaolamb]

Other than these small comments, everything looks good. So once we land the keystone-operator changes, we should be ready to go with this patch as well. I don't see any issues with the update/upgrade path. The only thing worth adding might be a kuttl test with the new secret

[mrkisaolamb]

why we downgrade this requirements?

[Deydra71]

Thanks for catching this! Probably an old remnant of local testing..

[mrkisaolamb]

please add also negative assert for username, password etc, also to be sure that we cover all changes in conf we should also assert auth_type

[openshift-ci]

@Deydra71: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/precommit-check	e683b4d	link	true	/test precommit-check
ci/prow/placement-operator-build-deploy-kuttl	e683b4d	link	true	/test placement-operator-build-deploy-kuttl

Full PR test history. Your PR dashboard.

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