This is a little tool that can help you experiment and learn Envoy proxy configuration.

It's a Kubernetes pod with a few containers:

1. httpbin - a webserver that allows inspection of requests
2. envoy - Envoy that proxies to httpbin (1)
3. envoy-playground - a web application that allows to edit the configuration of Envoy (2) and shows the result of httpbin (1)

Example

1. Deploy and launch envoy-playground
2. Examine the default envoy config on the right pane, and the resulting httpbin in the right pane
3. Make a change to the configuration, for example, add a host_rewrite: itaysk.com to the default route
4. Click on 'Apply' and wait for the resulting httpbin pane to reload
5. In the resulting httpbin pane, click on /get to examine the HTTP GET request. Notice how the HOST header is seen as itaysk.com

Deploy

An easy way to play with it is to kubectl create -f ./deploy/.
This will create the pod and expose it using a NodePort Service. Then you will need to update (or create) the envoy-playground-config ConfigMap with the node port of the envoy listener. In the future I may find a better way to automate this.

Future

Stuff I may improve:

• Schema validation for the envoy config
• Better deployment story
• Cover more Envoy scenarios (like egress)

I'm open for suggestions, feedback and contributions.