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kubedoom

README.md

kubedoom

The kubedoom is a fun way to show the self-healing capabilities of Kubernetes.

Install

Please ensure that you are in the kubedoomfolder and startup cluster and install kubedoom following these steps.

  1. Create local kind cluster - on *nix run ./create_cluster.sh
  2. Deploy kubedoom 
    kubectl apply -k ./deploy

kubedoom should be running. To see what was created run kubectl get all -n kubedoom which will show resources inside of the kubedoom namespace.

Install "Demons"

The Kubernetes pods will show as demons which can be killed inside of the game. The following command will start up some Kubernetes pods.

kubectl apply -k ./demons

To see what was created run kubectl get all -n demons. 6 pods should be running or starting up. It is possible to reduce or increase the number of demons by scaling the deployment.

Play

A vnc client is needed to connect to the game and get started.

MacOS

MacOS has built-in support for connecting to vnc servers.

  1. Open "Finder"
  2. Select "Go" -> "Connect to server"
  3. Type vnc://localhost:5900

Password is idbehold

Linux/Windows

Linux and Windows requires a separate vnc client to conenct to the game.

  1. Install a vnc client, e.g., https://www.realvnc.com/en/connect/download/viewer/
  2. Connect to localhost:5900

Password is idbehold

Find some Demons

Now go find some pods.

Doom

Typing idspispopd will make it possible to go through the walls - the demons should be to the right when starting the game. idkfa will supply extra weapons and more.

Possibly watch the demons namespace while playing seeing the pods being terminated.

kubectl get pod -n demons --watch

Takeways

  • it is possible to run Kubernetes on your local machine
  • you would be able to deploy this on a lot of other infrastructures including public cloud
  • whatever can be containerised can run inside a kubernetes cluster, however a lot needs to be added before having something that is ok for production use, which is a completly different set of workshops.
  • we see that kubernetes aims at keeping the number of pods at the defined level - this is called the reconcillilation loop - or "self healing"

Read more

Play away....

Clean up

$ ./delete_cluster.sh