feat: support for enabling proxy protocol on specified ports only

[arnaud-dezandee]

Issue

Hi! I am using the LBC with Istio gateway ingress and the proxy protocol activated on the k8s service, but the health check port 15021 on the Istio side does not support this protocol.

Description

Keeping the default behavior with a * value for the service.beta.kubernetes.io/aws-load-balancer-proxy-protocol, this change allows you to specify a list of ports (i.e., target groups) on which the proxy protocol will be activated.

Example for Istio:

service.beta.kubernetes.io/aws-load-balancer-proxy-protocol: 80, 443

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: arnaud-dezandee / name: Arnaud Dezandee (5537c40)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @arnaud-dezandee. Thanks for your PR.

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[arnaud-dezandee]

bump

[shraddhabang]

/lgtm
/assign @oliviassss

[k8s-ci-robot]

New changes are detected. LGTM label has been removed.

[arnaud-dezandee]

bump

[marc-philipp-knechtle]

Hi, it would be really nice to have this feature :) Are there any updates on this?

[k8s-triage-robot]

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/lifecycle stale

[k8s-triage-robot]

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

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/lifecycle rotten

[k8s-triage-robot]

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

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/close

[k8s-ci-robot]

@k8s-triage-robot: Closed this PR.

In response to this:

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

This bot triages PRs 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 PR is closed

You can:

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/close

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[arnaud-dezandee]

/reopen

[k8s-ci-robot]

@arnaud-dezandee: Failed to re-open PR: state cannot be changed. The main branch was force-pushed or recreated.

In response to this:

/reopen

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[arnaud-dezandee]

/reopen

[k8s-ci-robot]

@arnaud-dezandee: Reopened this PR.

In response to this:

/reopen

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: arnaud-dezandee
Once this PR has been reviewed and has the lgtm label, please ask for approval from oliviassss. For more information see the Code Review Process.

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[arnaud-dezandee]

/remove-lifecycle rotten

[arnaud-dezandee]

Rebased and updated. Test looks ok, should be good

[arnaud-dezandee]

bump