[Misc] enhance headless service sync with update logic

[omerap12]

Pull Request Description

While adding tests to pkg/controller/stormservice/sync_test.go I noticed that currently the headless service sync logic only handles creation of new services without properly updating existing ones. This PR enhances the sync logic to handle both creation and updates, ensuring service properties (Type, Selector, ClusterIP) stay properly synchronized. Added comprehensive unit tests to verify both scenarios.

Related Issues

Resolves: NONE

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[gemini-code-assist]

Summary of Changes

Hello @omerap12, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the stormservice controller's ability to manage headless services by extending its synchronization logic. It now not only creates new headless services when needed but also correctly updates existing ones to ensure their properties align with the desired state. This improvement is thoroughly validated by new unit tests covering both creation and update scenarios.

Highlights

• Headless Service Sync Enhancement: The syncHeadlessService function in the stormservice controller has been updated to correctly handle updates of existing headless services, ensuring their Type, Selector, and ClusterIP properties are synchronized. Previously, this function only handled the creation of new services.
• Unit Test Coverage: Comprehensive unit tests have been added for the syncHeadlessService function, covering both the creation of new headless services and the updating of existing ones, significantly improving test coverage and reliability for this critical synchronization logic.

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[gemini-code-assist]

Code Review

This pull request enhances the headless service synchronization logic to handle updates, which is a great improvement. My review focuses on a critical error handling bug in the new logic and suggests an optimization to avoid unnecessary API calls. I've also pointed out a minor issue in the new test code. Overall, the changes are in the right direction.

[googs1025]

Can we use something like this? (This code seems more concise)

if !isServiceEqual(headlessService, expectedService) {
    headlessService.Spec = expectedService.Spec
    if err := r.Client.Update(ctx, headlessService); err != nil {
	    return fmt.Errorf("failed to update headless service: %w", err)
    }
    r.EventRecorder.Eventf(service, corev1.EventTypeNormal, "Updated", "Headless Service updated")
}

func isServiceEqual(a, b *corev1.Service) bool {
	return a.Spec.Type == b.Spec.Type &&
		apiequality.Semantic.DeepEqual(a.Spec.Selector, b.Spec.Selector) &&
		a.Spec.ClusterIP == b.Spec.ClusterIP
}

Also, I'm not sure why we need a sync update. The headless service seems to be injected internally at the beginning and will not involve modifications? Right? 🤔

[omerap12]

I'm not sure if this is needed either, but it's part of the reconciliation loop, so it seems okay to have it. Still, I'm not completely sure.

[Jeffwan]

The headless service seems to be injected internally at the beginning and will not involve modifications? Right?

Yes. I think the projection is helpful just in case user modified the service themselves. no harm to add it with enough coverage

[Jeffwan]

I think what @googs1025 suggest is clean and concise. We can adopt the way to compare the resources.

@omerap12 could you help resolve the lint issue and rebase the main branch?

[omerap12]

Yeah sure. thanks folks

[googs1025]

sgtm

[Jeffwan]

/cc @googs1025 I will leave review work to you. let me whether the change looks good to you.

[googs1025]

LGTM.