Controller: Add traffic distribution support.

[tufitko]

What this PR does / why we need it:

Support trafficDistribution. If service doesn't have an endpoint with matched zone, fallbacks to all endpoints

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

#11342

How Has This Been Tested?

writing unit tests

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added unit and/or e2e tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

This issue is currently awaiting triage.

If Ingress contributors determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

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[k8s-ci-robot]

Hi @tufitko. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[strongjz]

/triage accept
/priority backlog

[k8s-ci-robot]

@strongjz: The label(s) triage/accept cannot be applied, because the repository doesn't have them.

Details

In response to this:

/triage accept
/priority backlog

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[strongjz]

/kind feature

[Gacko]

/triage accepted
/kind feature
/priority backlog
/lgtm

Was a bit hard to understand at first, but I realized you're mostly extending existing behavior, so looks good to me! 🙂

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Gacko, tufitko

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Needs approval from an approver in each of these files:

• OWNERS [Gacko]

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[mliner]

Hey gents, any idea which release will contain this feature? controller 1.12.3 doesn't have it.