svcteleporter : A Kubernetes Service Teleporter.

If you have a firewalled service that you need to make available in your Kubernetes or Openshift cluster, you can use svcteleporter to securely expose it in the cluster without having setup a VPN or poke holes on the firewall protecting the private network where your service is located.

How it works

svcteleporter runs a an exporter process in your on premise network to establish an outbound ssh over secure web sockets (wss) connection to an importer pod that runs in your publicly accessible kubernetes cluster. The wss connection uses mutual tls authentication so to ensure that only your kubernetes cluster can access the exported service. The importer pods exposes:

1. a public kubernetes service the ssh over wss connection
2. a private kubernetes service at that is a proxy to the on premise service.

Figure #1

            Firewall
                |                   +-- Kube Cluster --+
+----------+    |    ssh over wss   |  +----------+    |
| exporter | ------------------------> | importer |    |
+----------+    |                   |  +----------+    |
      |         |                   |        ^         |
      v         |                   |        |         |
+----------+    |                   |  +----------+    |
| Database |    |                   |  |    pod   |    |
+----------+    |                   |  +----------+    |
                |                   +------------------+

Installing

Browse the releases page, extract the appropriate executable for your platform, and install it to your PATH.

$ svcteleporter create 

Usage

First you need to create configuration files for the importer and exporter processes. You can use the svcteleporter create command for that.

The main thing you need to figure out is a host name that your importer process will be available at. In my following example, I'll be running the importer on an OpenShift cluster at b6ff.rh-idev.openshiftapps.com. I'll run the importer on the svcteleporter-importer-ws-svcteleporter.b6ff.rh-idev.openshiftapps.com host. I want to have Kube service named asf listening on port 8080 forward traffic the service apache.org:80 that the exporter can access.

$ svcteleporter create svcteleporter-importer-ws-svcteleporter.b6ff.rh-idev.openshiftapps.com asf:8080,apache.org:80
wrote:  standalone-importer.yaml
wrote:  standalone-exporter.yaml
wrote:  openshift-importer.yaml
wrote:  openshift-exporter.yaml
  
These files contain secrets.  Please be careful sharing them.
$  

You can then use the oc create -f openshift-importer.yaml to create the importer deployment on your openshift cluster. You can also use oc create -f openshift-exporter.yaml to create the exporter. If you don't have an openshift cluster, you can manually run the importer and exporter processes like so:

$ svcteleporter importer standalone-importer.yaml
$ svcteleporter exporter standalone-exporter.yaml

Installing From Source

Requires Go 1.12+. To fetch the latest sources and install into your system:

go get -u github.com/chirino/svcteleporter

Buidling From Source

Use git to clone this repo:

git clone https://github.com/chirino/svcteleporter
cd svcteleporter

Then you can build it using:

Platform	Command to run
Windows	mage
Other	./mage