Awesome

Access Pod Online using Podtnl

• Expose your pod to Online easily from any kubernetes clusters without creating a kubernetes service.

• Clusters including minikube, kind, PKS, AKS, GKE, DK, etc

• No need to worry about accessing your application during development, forget about the following buzz words [ingress, controller, loadbalancer, Public IP, etc]

Podtnl uses two concepts:

• Port Forward
• Tunnel

Installation

Podtnl is available in homebrew

$ brew tap narendranathreddythota/podtnl
$ brew install podtnl

Download Binary

https://github.com/narendranathreddythota/podtnl/releases/download/1.0/podtnl

Build from Source

$ git clone https://github.com/narendranathreddythota/podtnl
$ cd podtnl
$ go build 
$ cp podtnl /var/local/bin

Tunnel Providers

Podtnl is built in a way that it can support any tunnel provider. Currently Podtnl support only Ngrok as tunnel provider

Ngrok

• Install Ngrok from their website

Usage:

Available Flags

  version        : Output Podtnl Version
  provider       : Input Tunnel Provider
  providerPath   : Input Tunnel Provider Path
  podname        : Input Pod Name
  protocol       : Input Type of Protocol
  namespace      : Input Namespace
  podport        : Input Pod Port
  auth           : Need Authentication ? Applicable for HTTP

➜  ~ podtnl --help

 Usage: podtnl := Please Provide necessary Arguments..
  -v    prints current podtnl version
  -auth
        Need to secure the exposed pod with Basic Auth? (default true)
  -namespace string
         Please Provide Namespace where pod is running.. (default "default")
  -podname string
        Please Provide Pod Name
  -podport int
        Please Provide Pod Port
  -protocol string
        Please Provide Type of Protocol HTTP or TCP (default "http")
  -provider string
        Input Tunnel Provider (default "ngrok")
  -providerPath string
        Please Provide Tunnel Provider Path (default "/usr/local/bin/ngrok")

HTTP

$ podtnl -provider ngrok -podname couchdb0-64d95cccc5-5phqz -podport 5984 -auth=false

Expected Output:
[INFO] ...Tunnel provider ngrok
[INFO] NGROK is Ready
[INFO] Username: QoElOkoMmFv45f8kNKOCSVzyJz9zfakb
[INFO] Password: jApdHSdVLdpXYCkVgYmzYzSD70j9tipdYvgWLhrZ1mdHGvcngdHiHpdvJfQjAins
Forwarding from 127.0.0.1:5984 -> 5984
Forwarding from [::1]:5984 -> 5984
[INFO] mytunnel is created and Live: -> https://fa8df289.ngrok.io
Handling connection for 5984
Handling connection for 5984
Handling connection for 5984
Handling connection for 5984

^C[WARN] Shutting down all open tunnels..
[DBUG] Closing tunnel in https://fa8df289.ngrok.io

TCP

$ podtnl -provider ngrok -podname orderer1-7cb4b7565-nv95k -podport 7050 -protocol tcp 

Expected Output:
[INFO] ...Tunnel provider ngrok
[INFO] NGROK is Ready
[INFO] mytunnel is created and Live: -> tcp://0.tcp.ngrok.io:10467

^C[WARN] Shutting down all open tunnels..
[DBUG] Closing tunnel in tcp://0.tcp.ngrok.io:10467

Note:

Please switch context to the target cluster which is running in Minikube or Kind or AKS or PKS or etc

$ kubectl config use-context {cluster_name} 

Kubectl get all should give the following output

NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   179d

If the following works perfectly

$ kubectl port-forward pod/couchdb0-64d95cccc5-5phqz 5984:5984

Then the following also works

$ podtnl -provider ngrok -providerPath /usr/local/bin/ngrok -podname couchdb0-64d95cccc5-5phqz -podport 5984 -auth=false

Do not forgot to hit <<<< ^C [CTL + C] >>>> in order to close the open tunnels

Error

Wrong Pod

➜  ~ podtnl -provider ngrok -podname somedummypodnameorwrongname -podport 5984
[INFO] ...Tunnel provider ngrok
[FTAL] error upgrading connection: pods "somedummypodnameorwrongname" not found

Wrong Provider Path

➜  ~ podtnl -provider ngrok -providerPath /usr/local/bin/ng -podname $POD -podport 5984
[INFO] ...Tunnel provider ngrok
2020/05/24 00:39:59 fork/exec /usr/local/bin/ng: no such file or directory

Socat Error

For wrong Port or unable to port forward situations

E0524 00:42:00.609685   24854 portforward.go:400] an error occurred forwarding 5989 -> 5989: error forwarding port 5989 to pod 2f82fec0fb08efb22d2efcf02beb02b89a73398dd82c9a3e82103346c3f074f3, uid : exit status 1: 2020/05/23 20:42:00 socat[30542] E connect(5, AF=2 127.0.0.1:5989, 16): Connection refused

Thank you gonnel

Licensing

Podtnl is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.