perf: Reduce delete calls by checking DeletionTimestamp

[jonathan-innis]

Fixes #N/A

Description

Check DeletionTimestamp when calling Delete(). If the DeletionTimestamp is already set, we don't need to call Delete() again. I noticed that we were over-calling Delete() when I was looking at kube-apiserver audit logs for the termination flow.

For instance, for a singe Node that was stuck terminating due to evictions for 5m, it had 176 calls to Delete() the NodeClaim.

How was this change tested?

make presubmit

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[fmuyassarov]

Looks good :)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fmuyassarov, jonathan-innis

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[coveralls]

Pull Request Test Coverage Report for Build 8261254321

Details

• 7 of 11 (63.64%) changed or added relevant lines in 2 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.008%) to 78.676%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controllers/node/termination/controller.go	3	5	60.0%
pkg/controllers/nodeclaim/termination/controller.go	4	6	66.67%

Files with Coverage Reduction	New Missed Lines	%
pkg/utils/atomic/lazy.go	2	87.88%

Totals
Change from base Build 8260153634:	0.008%
Covered Lines:	8235
Relevant Lines:	10467

---

💛 - Coveralls

[engedaam]

/lgtm

[Bryce-Soghigian]

🙌