auto backend protocol for HTTP/HTTPS

[vdksystem]

What this PR does / why we need it:

It allows to set protocol for proxy_pass according to request scheme

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

How Has This Been Tested?

Manual testing in kubernetes cluster

Checklist:

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

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[k8s-ci-robot]

Welcome @vdksystem!

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[k8s-ci-robot]

Hi @vdksystem. 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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[nicolaballotta]

hi, any update on this @cmluciano @ElvinEfendi? Would you be able to review it?

[valeriano-manassero]

I would like to not drop this one since I think it may be useful.

[rikatz]

@vdksystem please sign the CLA :)

[vdksystem]

/check-cla

[rikatz]

Hi,

Thanks for your PR.

• If your PR is ready, please remove the WIP from the title
• Can you please add some unit tests in template generation?
• Can you please add some e2e tests for this scenario here? https://github.com/kubernetes/ingress-nginx/blob/main/test/e2e/annotations/backendprotocol.go

Thanks

[rikatz]

Please, also ping me on Slack as soon as this can be reviewed again (as I'm missing a lot of github notifications those last days)

Thanks
/assign
/cc

[k8s-ci-robot]

Thanks for your pull request. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please follow instructions at https://git.k8s.io/community/CLA.md#the-contributor-license-agreement to sign the CLA.

It may take a couple minutes for the CLA signature to be fully registered; after that, please reply here with a new comment and we'll verify. Thanks.

---

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please sign in with your organization's credentials at https://identity.linuxfoundation.org/projects/cncf to be authorized.
• If you have done the above and are still having issues with the CLA being reported as unsigned, please log a ticket with the Linux Foundation Helpdesk: https://support.linuxfoundation.org/
• Should you encounter any issues with the Linux Foundation Helpdesk, send a message to the backup e-mail support address at: [email protected]

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/test-infra repository. I understand the commands that are listed here.

[lucadelmonte]

/check-cla

[rikatz]

/ok-to-test

[rikatz]

/lgtm
/approve
Thank you!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rikatz, vdksystem

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Needs approval from an approver in each of these files:

• OWNERS [rikatz]

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