Add Resource Annotations to L4 LB Service

[08volt]

• change ensure LB return type to include both Status and Annotations
• added tests to check annotations are correctly set on both Internal and External L4 LBs
• added Merge Annotation helper function and tests for it

[k8s-ci-robot]

This issue is currently awaiting triage.

If the repository mantainers determine this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[08volt]

/retest

[08volt]

/retest

[TortillaZHawaii]

Do we need to export anything outside these Target Pools or Backend Service? I feel like adding more than necessary will limit our potential to add or modify stuff in the future.

For example in ingress-gce names for NetLB Forwarding Rules didn't take into account protocols, which made the design more difficult, as it needed to consider more cases. If we start exporting more than necessary and someone starts depending on those values we might be boxed in. We won't even know if someone depends on this values.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: 08volt
Once this PR has been reviewed and has the lgtm label, please assign bowei for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• cmd/cloud-controller-manager/OWNERS
• providers/gce/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment