Kunnel
Kunnel is short for Kubernetes tunnel, built for exposing Kubernetes service to outside the cluster without LoadBalancer or NodePort.
Install
Binaries
You can download releases directly from Release Page
Build from source
git clone https://github.com/zryfish/kunnel.git
cd kunnel
make all
Binaries server client and kubectl-kn will be found under directory bin/.
How to run
Proxy kubernetes service
It's easy to proxy service of Kubernetes. Suppose you have an nginx service under namespace default.
root@master:~# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.233.0.1 <none> 443/TCP 11d
nginx ClusterIP 10.233.48.225 <none> 80/TCP 8s
To proxy nginx service, just simply run the following command in your cluster.
root@master:~# kubectl-kn -n default -s nginx
W0906 07:48:19.298922 16910 main.go:58] No port specified, will use first port [80] of service
I0906 07:48:19.339564 16910 client.go:180] Service available at https://vl41w0ixmn.kunnel.run
Now, you can access your nginx service through the address https://vl41w0ixmn.kunnel.run. Like the following: 
To run proxy background, just add option
-d. For examplekubectl-kn -n default -s nginx -d. This will create a deployment in your cluster under namespace given.
Proxy for ingress
Kunnel can proxy requestes for virtualhost. For example, my ingress controller service under namespace kubesphere-controls-system, this is an ingress rule with host foo.bar.
root@master:~# kubectl -n kubesphere-controls-system get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubesphere-router-test NodePort 10.233.14.239 <none> 80:32360/TCP,443:32604/TCP 2m21s
root@master:~# kubectl -n test get ing
NAME CLASS HOSTS ADDRESS PORTS AGE
test <none> foo.bar 192.168.0.14 80 5m4s
To proxy requests for rule test with Host foo.bar, just create tunnel with host override by specify --host foo.bar
We can create a tunnel for ingress controller by following:
root@master:~# kubectl-kn -n kubesphere-controls-system -s kubesphere-router-test --host foo.bar -d
root@master:~# kubectl -n kubesphere-controls-system logs -lapp=kunnel
I0906 08:13:28.258512 1 client.go:180] Service available at https://3fc3p231wj.kunnel.run
Now we can access ingress rule test through the address https://3fc3p231wj.kunnel.run.
Kubectl plugin
We are working to merge kunnel into krew
