How to, Azure, kubernetes

Kubernetes Integration Testing: MiniKube + Azure Pipelines = Happy

I recently did some work on a fairly simple controller to run inside Kubernetes. It connects to the K8s API and watches for changes to ingress objects in the cluster.

I had a nice cluster spun up for testing which I could tweak and poke then observe the results. This was nice BUT I wanted to translate it into something that ran as part of my CI process to make it more repeatable. Having not played much with the new Azure Pipelines I decided to try and get this working using one.

Here was the goal:

    • Build the source for the controller
    • Spin up a Kuberentes cluster
    • Deploy test resources (Ingress and Services) into the cluster
    • Connect the controller code to the cluster and run it’s tests

The obvious choice was to look at creating the clusters inside a cloud provider and using it for testing but I wanted each PR/Branch to be validated independently in a separate cluster, ideally in parallel, so things get complicated and expensive if we go down that route.

Instead I worked with MiniKube which has a ‘no vm mode’, this spins up a whole cluster using just docker containers. The theory was, if the CI supports running docker containers it should support MiniKube clusters…

TLDR: Yes this is possible with MiniKube and Azure Pipelines or Travis CI – Skip to the end to see how.

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How to, kubernetes, vscode

Autocomplete Kubernetes YAML files in VSCode

I’ve increasingly been working with Kubernetes and hence lots of YAML files.

It’s nice and easy to get autocomplete setup for the Kubernetes YAML using this awesome extension YAML Support by Red Hat

Setup:

  • Install the Extension
  • Add the following to your settings
    "yaml.schemas": {
      "Kubernetes": "*.yaml"
    }
    
  • Reload the editor

Here is me setting it up and showing it off:
vscodeyamlautocomplete3

Massive thanks to the team that worked on the extension and language server to support this!

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