Add cilium to conformance testing

[acelinkio]

Please add Cilium into knative's testing of the gatewayapi.

Cilium is a CNI, kube-proxy replacement, sidecar-less service mesh, load balancer, and observability tool that also offers a gateway controller. Cilium 1.15 will support all gateway-api features except for one as seen in their conformance report, https://github.com/kubernetes-sigs/gateway-api/blob/main/conformance/reports/v0.8.1/cilium-cilium.yaml.

Cilium is growing in popularity and leverages some of the most recent Linux features. Greatly appreciate if it could be added and regularly tested against Knative!

[bittermandel]

Happy to help out with the implementation of this! We're looking to use Cilium for Gateway API and it feels like the best way to make it work with Knative.

[acelinkio]

hey @tomaszkiewicz, thanks for opening the filters issue. I have applied that filters fix but not sure how to configure the rest of this project to work with Cilium. Would you happen to have an example of how you setup Knative?

I had kourier ingress working, but not understanding how to get the gateway setup functioning. If anyone has any working examples that would be great!

my setup: https://github.com/acelinkio/argocd-homelab/blob/main/manifest/knative-serving.yaml

[tomaszkiewicz]

Hi, sure: I simply followed a readme on this repository to deploy both KNative as well as all the settings, then fine tuned some of them in config-gateway config map:

 visibility: |                                                   
   ExternalIP:                                                   
     class: cilium                                               
     gateway: default/cilium-gateway                             
     service: default/cilium-gateway-cilium-gateway              
   ClusterLocal:                                                 
     class: cilium                                               
     gateway: default/cilium-gateway                             
     service: default/cilium-gateway-cilium-gateway                                               

Then I created a gateway object like that:

apiVersion: gateway.networking.k8s.io/v1beta1
kind: Gateway
metadata:
  name: cilium-gateway
spec:
  gatewayClassName: cilium
  listeners:
    - protocol: HTTP
      port: 80
      name: web

[acelinkio]

Hey @tomaszkiewicz ,

I have Cilium/Knative working! However was wondering if you found a way to do path based routing to a Knative service.? ie, /api/v1 -> microservice1. /api/v2/ -> microservice2

There is minimal flexibility on the HTTPRoutes that the net-gateway-api creates.

[tomaszkiewicz]

I doubt it's possible in the current version...

[dprotaso]

if you found a way to do path based routing to a Knative service.? ie, /api/v1 -> microservice1. /api/v2/ -> microservice2

We have examples with Istio where you route the external gateway traffic to the internal gateway based on paths and rewrite the host header

See: https://github.com/knative/docs/blob/main/code-samples/serving/knative-routing-go/routing.yaml

I'm going to mark these comments off topic - feel free to open an new issue regarding this in here or in knative/serving repo

[dprotaso]

Depends on #621

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[blackliner]

cilium/cilium#29080 has been closed/merged, what does this mean for this issue?

[dprotaso]

/lifecycle frozen

Hey @blackliner it would be good for someone to take on this issue and add cillium testing. Then we can see what's broken and see if there's some resolution.

To layout the work you can look at what I did for envoy gateway

First I added optional presubmit jobs to our CI here knative/infra#451. This will run against pull requests.

With that in place you can add all the cillium stuff to this repo - the envoy gateway example is here #738

I'm a bit busy with other stuff to take this on - but I can assist

[bredamatt]

What is the status on Cilium integartion into KNative? Would be great to have this since Cilium is widely used as a CNI 👍🏼