Microk8s: Running KUARD (Kubernetes Up And Running Demo) on a small cluster

There is a cool demo application, which you can use to check your kubernetes settings. This application is called kuard (https://github.com/kubernetes-up-and-running/kuard):

To get it running in a way that you can deinstall it easily run the following commands:

# kubectl create namespace kuard
namespace/kuard created

You can deploy it via "kubectl run" or create a YAML with "kubectl run ... --dry-run=client --output=yaml" and deloy via "kubectl apply":

#kubectl run kuard --image=gcr.io/kuar-demo/kuard-arm64:3 -n kuard --port 8080 --dry-run=client --output=yaml
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: kuard
  name: kuard
  namespace: kuard
spec:
  containers:
  - image: gcr.io/kuar-demo/kuard-arm64:3
    name: kuard
    ports:
    - containerPort: 8080
    resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Always
status: {}

or 

# kubectl run kuard --image=gcr.io/kuar-demo/kuard-arm64:3 -n kuard --port 8080

To expose it in your cluster run:

# kubectl expose pod kuard --type=NodePort --port=8080 -n kuard
service/kuard exposed

And then check the port via

# kubectl get all -n kuard
NAME        READY   STATUS    RESTARTS   AGE
pod/kuard   1/1     Running   5          3d20h

NAME            TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
service/kuard   NodePort   10.152.183.227   <none>        8080:32047/TCP   3d20h

The number after 8080: is the port you can use (http://zigbee:32047/) 

With kuard you can run DNS checks on the pods or browse the filesystem, to check things... You can even set the status for the liveness and readyness probes.