feat: allow proxy protocol configuration for APISIX

[heresie]

Hello everybody 👋

I'm currently trying to install APISIX on Kubernetes clusters that need to use Proxy Protocol in order to be usable. Unfortunately, the current Helm Chart does not allow to configure APISIX with proxy protocol by using values.yaml configuration.

The previous PR #353 about this subject is getting old, and @hgranillo has moved from APISIX, so here is a new one, updated and ready to merge.

I tested this Chart update on our K8S clusters, without any problem.

As stated in the original PR :

This PR adds the option to enable Proxy Protocol in the APISIX configuration file and allows to add the proxy protocol listeners to the gateway Kubernetes service.

Made all ports configurable in a fashion similar to apisix-gateway and apisix-gateway-tls.

I left enable_tcp_pp_to_upstream out because at this moment I have no way to test it. I can add the toggle if needed to merge this PR.

I tested these changes with the following configuration in one of my EKS Clusters.
I'm using the aws-load-balancer-controller to provision a NBL with SSL/TLS Offloading and Proxy Protocol enabled (see loadbalancer annotations below)

This allows me to send HTTP(80) -> ProxyProtocol HTTP(9181) and HTTPS 443 -> ProxyProtocol HTTP (9181)

Here is the values.yaml I used for tests :

global:
  enableIPv6: false
  storageClass: <my-storage-class>

apisix:
  kind: DaemonSet
  proxyProtocol:
    enabled: true
    listenHttpPort: 9181
    listenHttpsPort: 9182

gateway:
  type: NodePort
  http:
    enabled: true
  tls:
    enabled: true
  proxyProtocol:
    http:
      enabled: true
      nodePort: 30080
      containerPort: 9181
    https:
      enabled: true
      nodePort: 30443
      containerPort: 9182

This PR also bumps Chart Version to the next minor : 1.4.0.

All comments are welcome.

[heresie]

Hello!

Some checks have failed due to a missing space in chart comments.
It has been fixed.

[heresie]

Hello!

Thanks for the CI trigger.

I've updated the Apisix Helm Chart Readme accordingly with helm-docs, as required by the GitHub workflow. (Nice tool I didn't know by the way!)

[heresie]

Hello!

Is there any maintainer for the PR review? Thanks in advance.

[Gallardot]

I didn't find any more details on this proxy protocol feature. Not sure if the current modification is appropriate. PTAL @tao12345666333

[tao12345666333]

I will add this to my list and review it ASAP. Thanks

[heresie]

Hello @tao12345666333, have you seen latest changes for this topic? Thank you in advance for your help.

[tao12345666333]

Other parts LGTM

[tao12345666333]

And please resolve the conflicts.

[heresie]

@tao12345666333 said :

And please resolve the conflicts.

The conflicts are resolved.

[franek]

🎉

[Gallardot]

LGTM! Thank you for your contribution!