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Kubernetes Reverse Proxy

If you've started using kubernetes without a cloud provider then you'll notice that it's more difficult than it should be to expose a service externally. This project solves this problem.

Configuring the master

You'll probably want to run this proxy on the master of your Kubernetes cluster. For this to work you'll also have to run kube-proxy on the master as well. This will allow it to connect to the load balanced overlay network IPs.

Configuring DNS wildcard

You'll also want to have a domain or subdomain which you can use to refer to your services. You'll need to define an A record for * and point it to your Kubernetes master. For example: A *.example.com. 1.1.1.1.

Running the proxy

The proxy generates virtualhosts nginx. It polls the kubernetes API every INTERVAL seconds to regenerate it's vhosts, and makes nginx reload it's configuration. It uses the service name to generate a subdomain (<service_name>.<DOMAIN>); e.g. microbot-v1.example.com. It then maps this subdomain to the load balancer's IP.

docker run \
  -e KUBERNETES_MASTER=http://172.17.8.101:8080 \
  -e INTERVAL=10 \
  -e DOMAIN=example.com \
  -p 80:80 \
  malet/revprx-k8s

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Reverse Proxy for Kubernetes

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