NGINX: Add NJS

[anurag-rajawat]

What this PR does / why we need it:

This PR is the continuation of #11248.

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

How Has This Been Tested?

I verified my changes by:

• Deploying the ingress controller by following official doc
• Using the image built with these changes.

Here is a screenshots that show it has nginx-njs module:

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.

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[strongjz]

Great start. Can you add an e2e test that exercises using the njs model?

[strongjz]

Great start. Can you add an e2e test that exercises using the njs model?

This may have to wait till we release a new nignx base image. We do rebuild the controller in all e2e but not the nginx base.

[strongjz]

/ok-to-test

[strongjz]

/kind feature
/priority backlog

[strongjz]

We do build the nginx image, so we can add some e2e test for njs.
https://github.com/kubernetes/ingress-nginx/actions/runs/11776116543/job/32797881046#step:9:1

[Gacko]

I'm not even sure if we should still add this on Ingress NGINX. @strongjz

/hold

[anurag-rajawat]

Hey @strongjz, should we proceed with further changes?

[strongjz]

Hey @strongjz, should we proceed with further changes?

Let's chat after our maintainers talk tomorrow. We've got plans for things going forward.

[strongjz]

Also need to rebase to get the go lint ci 0207d18

[rikatz]

Latest is 0.8.7

[anurag-rajawat]

The latest one is not available at https://hg.nginx.org/njs/tags. However, if we want the latest we can build it from source.

[rikatz]

Let's not feature flag it now. I think we can just load the module but not do any operation.

It will help me migrating away from some openresty and C modules that are loaded just for very simple operations

[rikatz]

/triage accepted
/priority important-soon

We need this to start removing some 3rd party modules from NGINX and some one-line openresty scripts that could be an njs script.

I think for now, only have the module but not load it nor hide it behind a flag is enough

[rikatz]

/hold cancel

[Gacko]

Still we need to fix the NGINX build on main first for the v1.12 release.

/hold

[Gacko]

Also this branch is out-of-date and needs to be rebased.

[rikatz]

@Gacko I am not following the relation here. Is main branch broken, or are you cutting 1.12 from a release branch?

What is broken? What is the status of the fix?

[Gacko]

Suggested change

	## enable-njs
	Enables or disables [njs](https://nginx.org/en/docs/njs/) module. _**default: false**_
	## enable-njs
	Enables or disables [NJS](https://nginx.org/en/docs/njs) module. _**default: false**_

[Gacko]

Every branch is broken because we are doing an apk upgrade in the build.sh and we are building the NGINX base image for the release branches from main.

[rikatz]

Specifically what is broken from the upgrade? Which part of the build?

[Gacko]

There are compilation failures, I'm already working on this. You can see the release-cloud-build branch for it. Anyway: Please just postpone any changes to the NGINX base image until we got release v1.12 out.

Just keep in mind: What ever you change, we won't release it before v1.13 anyway as there already is a v1.12 on its way and we first need to fix this. So new features like this, cross plane or NGINX v1.27.1 are not urgent and can stay unmerged for now.

[rikatz]

The idea is not to release on v1.12 any of crossplane or njs changes, I was more willing to not block changes that long and trying to understand what's going on the build.

I will take a look into your branch and recent cloud builds to understand what's going on

[Gacko]

Of course we are not planning to release Crossplane or NJS on v1.12, but currently the NGINX base image Cloud Build is broken on all the branches and I'd like to prevent any changes to the NGINX base image before we haven't figured out what's wrong, also because we normally build the NGINX base image for all branches from the main branch. So merging anything to the main branch could possibly affect this.

Ideally we are building the NGINX base image per branch, but this is something we need to figure out via well thought release engineering and versions in the TAG file across branches.

[Gacko]

Requesting changes so this isn't getting merged, yet, as we are currently still working on fixing the NGINX build first.