minizilla/knrp

Knative Reverse Proxy

Knative Reverse Proxy

Knative Reverse Proxy (knrp) for local development of Knative application with/without magic DNS.

Install

go install github.com/injustease/knrp@latest

Usage

Run Knative cluster

The easiest way is using Knative quickstart.

Fetch the Knative networking layer for <gateway>

Fetch the External IP.

# Kourier
kubectl --namespace kourier-system get service kourier

# Istio
kubectl --namespace istio-system get service istio-ingressgateway

# Contour
kubectl --namespace contour-external get service envoy

Example output Kourier (External IP is pending and it is intentional, use localhost instead), e.g. localhost:80 or simply localhost.

NAME      TYPE           CLUSTER-IP     EXTERNAL-IP   PORT(S)                      AGE
kourier   LoadBalancer   10.96.97.137   <pending>     80:32354/TCP,443:32488/TCP   33m

Fetch the Knative service URL for <service>

Fetch the Service URL.

# kn
kn service list

# kubectl
kubectl get services.serving.knative.dev

Example output with service hello in the namespace default, e.g. http://hello.default.example.com.

# without magic DNS
NAME    URL                                       LATEST        AGE   CONDITIONS   READY   REASON
hello   http://hello.default.example.com   hello-00001   34m   3 OK / 3     True    

# with magic DNS
NAME    URL                                       LATEST        AGE   CONDITIONS   READY   REASON
hello   http://hello.default.127.0.0.1.sslip.io   hello-00001   34m   3 OK / 3     True    

Run knrp

Command knrp <gateway> <service>

knrp localhost http://hello.default.127.0.0.1.sslip.io

Output knrp.

2022/04/06 16:05:19 knrp run at port: 52070

For more information run knrp --help.

Expose to the internet with ngrok

You now expose Knative service to the internet with ngrok by using knrp address.

ngrok http 52070