Andreas Mausch

minikube, a local Kubernetes

I want to share my short experience with minikube: https://minikube.sigs.k8s.io/docs/

I had a look at K3s and MicroK8s also, and I prefer minikube:

Minikube is the closest to an official mini distribution for local testing and development, it is run by the same foundation as K8s.

K3s is a project by Rancher, it is compliant but it’s completely up to them what is or isn’t included.

Microk8s is a spin on what minikube tries to do and is run and maintained by Canonical (the Ubuntu people).

Fully agree. Also please note that microk8s is being distributed using the proprietary snapcraft store, which could be a concern.

https://www.reddit.com/r/kubernetes/comments/be0415/k3s_minikube_or_microk8s/

1. Driver support

minikube supports different drivers, one of them is KVM2 which works on libvirt.

So it starts it's own virtual machine, and everything runs inside it.

This is great, because I like to use libvirt. And other people can use their favorite virtual machines tool, like VirtualBox.

It also makes cleaning up super easy, because your main system remains untouched.

2. Installation 

sudo pacman -S minikube kubectl
virt-host-validate

3. Set driver to libvirt 

minikube config get driver # should be not configured yet
minikube config set driver kvm2

4. Simple setup

All of the commands from the good documentation worked out-of-the-box. No struggle at all (which is not always the case for the tech projects I have tried).

minikube start
minikube dashboard
kubectl config view
kubectl get namespaces

5. Run your own service 

# Run single container/pod
kubectl run -it --rm --restart=Never --image alpine tmp -- sh
# Single-command deployment
kubectl create deployment hello-node --image=registry.k8s.io/e2e-test-images/agnhost:2.39 -- /agnhost netexec --http-port=8080
# Create deployment from file
kubectl create -f ./hello-world.yaml

# Opens the Service URL in the browser
minikube service hello-world
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-world-deployment
  labels:
    app: hello-world
spec:
  selector:
    matchLabels:
      app: hello-world
  replicas: 2
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-world
        image: bhargavshah86/kube-test:v0.1
        ports:
        - containerPort: 80
        resources:
          limits:
            memory: 256Mi
            cpu: "250m"
          requests:
            memory: 128Mi
            cpu: "80m"
---
apiVersion: v1
kind: Service
metadata:
  name: hello-world
spec:
  selector:
    app: hello-world
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 30081   
  type: NodePort

6. Some kubectl commands 

kubectl get deployments
kubectl get events
kubectl get pods,services
kubectl logs <pod-name>

7. Cleanup 

kubectl delete -f ./hello-world.yaml
minikube stop
minikube delete