fix issue 5167: Add Finalizer when create snat

[QEDQCD]

Pull Request

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

Examples of user facing changes:

• Bug fixes

Which issue(s) this PR fixes

Fixes #(5167)

[gemini-code-assist]

Hello @QEDQCD, 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!

Summary of Changes

This pull request addresses issue #5167 by adding a finalizer when creating a SNAT (Source Network Address Translation). The change ensures that the KubeOVNControllerFinalizer is added to the iptables SNAT object during creation. This allows the controller to properly manage the lifecycle of the SNAT and prevent premature deletion.

Highlights

• Bug Fix: The pull request fixes a bug where the finalizer was not being added when creating a SNAT.
• Finalizer Addition: The KubeOVNControllerFinalizer is now added to the iptables SNAT object during creation to manage its lifecycle.

Changelog

• pkg/controller/vpc_nat_gw_nat.go
  • Removes unused import klog/v2.
  • Replaces the removal of finalizers with the addition of the KubeOVNControllerFinalizer to the iptables SNAT object.

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---

A finalizer's gentle hand,
Guides resources across the land,
Ensuring clean release,
A state of perfect peace,
No orphans left in no-man's-land.

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[gemini-code-assist]

Code Review

The pull request addresses issue 5167 by adding a finalizer when creating a snat. This is a good step towards ensuring proper resource management. The change itself is small, but it's important to ensure it's done correctly and doesn't introduce any regressions.

Summary of Findings

• Redundant Finalizer Removal: The original code attempts to remove two finalizers before adding a new one. This seems unnecessary and potentially incorrect. Only adding the finalizer should be sufficient.

Merge Readiness

The pull request introduces a critical fix by adding a finalizer to the SNAT creation process. However, the original code had redundant finalizer removals that were removed in this pull request. Given the importance of finalizers for resource management, I recommend that this pull request not be merged until the identified issue is addressed. I am unable to approve this pull request, and recommend that others review and approve this code before merging.