K8S Tool to proxy-pass services from kubernetes cluster if you don't have a vpn to this cluster
You have a multiple HTTP endpoints at kubernetes cluster. To working with them as a Developer or QA you need to have a network access to them.
Let's assume that you have only kubectl access (no vpn or other things). To achieve that you need to run multile commands kubectl port-forward
This tool could save your time and terminals. It works like nginx proxy-pass.
k8ssvcproxy will autodiscover all services that have an edpoint and create a proxy tunnel to them using native kubectl tool
Don't forget to update the /etc/hosts (you could find content in the program output)
Example: Considering that you have 3 Services in k8s cluester
- nginx-1.default.svc.cluster.local at 8080
- nginx-2.default.svc.cluster.local at 8280
- nginx-3.default.svc.cluster.local at 8080
k8ssvcproxy will discover all this SVC and will create proxys to them
| Source | Destination |
|---|---|
| localhost:8080 + Host: nginx-1.default.svc.cluster.local | nginx-1.default.svc.cluster.local at 8080 |
| localhost:8080 + Host: nginx-2.default.svc.cluster.local | nginx-1.default.svc.cluster.local at 8280 |
| localhost:8080 + Host: nginx-3.default.svc.cluster.local | nginx-1.default.svc.cluster.local at 8080 |
go build
./k8ssvcproxy --namespace default
Output
Connecting to default using /Users/avchu/.kube/config
Service to proxy: nginx
Forwarding nginx: 8080
Trying to register servce: nginx
Forwarding from 127.0.0.1:59761 -> 8080
Servce nginx registered on port 59761
### START K8SSVCPROXY ###
127.0.0.1 nginx.default.svc.cluster.local
### END K8SSVCPROXY ###
One line should be added to /etc/hosts
Then you clould use curl to reach the endpoint
curl -v http://nginx.default.svc.cluster.local:8080
* Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to nginx.default.svc.cluster.local (127.0.0.1) port 8080 (#0)
> GET / HTTP/1.1
> Host: nginx.default.svc.cluster.local:8080
> User-Agent: curl/7.64.1
> Accept: */*
>
< HTTP/1.1 404 Not Found
< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Content-Language: en
< Content-Type: text/html;charset=utf-8
< Date: Sat, 01 May 2021 12:39:24 GMT
< Expires: 0
< Pragma: no-cache
< Referrer-Policy: no-referrer
< Transfer-Encoding: chunked
<
* Connection #0 to host nginx.default.svc.cluster.local left intact
<!doctype html><html lang="en"><head><title>HTTP Status 404 – Not Found</title><style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 404 – Not Found</h1></body></html>* Closing connection 0
| Name | Description | Default value |
|---|---|---|
| namesapce | k8s namesapce to discover | default or default,default2 for multiple namespaces |
| listen | host to bind | 127.0.0.1 |
| port | port to bind | 8080 |
| kubeconfig | path to kubeconfig | ~/.kube/config |