Delay between target removal in the TargetGroup and POD removal causing 502 error

[maikobritzke]

Describe the bug
I'm using HPA, and when the scalingdown is done, randomly the clients that consume the ALB receive a 502 error.

After much testing, I discovered that there is a delay between removing the POD (removing the internal IP) and removing the destination, within the TargetGroup, causing the ALB to still send traffic to a pod/port/ip that does not exist more. Even using a delay when closing the POD, this does not solve the problem.

I found some documentation and reports searching on the internet, but it actually seems to solve the problem.

Is there anything that helps me solve this problem?

Environment

• AWS Load Balancer controller version - 2.4.7
• Kubernetes version - 1.22 and 1.27
• Using EKS (yes/no), if so version? Yes, 1.22 and 1.27

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/lifecycle stale

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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/lifecycle rotten

[ptc-mrucci]

Would recommend closing this issue as duplicate of #2366

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

In response to this:

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Reopen this issue with /reopen
• Mark this issue as fresh with /remove-lifecycle rotten
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/close not-planned

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