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Exposing Ports Outside the Kubernetes Cluster

DZone's Guide to

Exposing Ports Outside the Kubernetes Cluster

Learn the fast and consistent way to get around a potentially confusing setup of exporting cluster ports.

· Cloud Zone ·
Free Resource

Learn how to migrate and modernize stateless applications and run them in a Kubernetes cluster.

So there is a ton of documentation out there on Kubernetes and how to expose ports outside the cluster. Perhaps I was having an issues interpreting the docs but I struggled for a long time with this. No matter what I did I found that I could get to the pod as long as I was inside the cluster (vagrant ssh minion-1) but could not get it from my browser.

After a lot of spinning I finally got this figured out; this article is to help others replicate it. The key was using nodePort value in the configuration, along with the node IP address, to reach into the pod from outside the cluster. This means setting ‘type: NodePort’ in your configuration then using the nodePort assigned with the IP address of the node to access: ‘http://10.245.1.3:30892/’.

Here's an image to help clarify:

Screen Shot 2015-08-27 at 7.53.44 PM kube-nodeport

 

Join us in exploring application and infrastructure changes required for running scalable, observable, and portable apps on Kubernetes.

Topics:
kubernetes ,clustering ,cloud

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