In short, microk8s is designed to be a fast and lightweight upstream Kubernetes install isolated from your host but not via a virtual machine. This isolation is achieved by packaging all the upstream binaries for Kubernetes, Docker.io, iptables, and CNI in a single snap package. The snap package is an application container?—?you can imagine this as a lighter weight version of a Docker container. It uses a lot of the same underlying technologies for isolation just without all the overhead of network isolation.
https://computingforgeeks.com/install-snapd-snap-applications-centos-7/
https://microk8s.io/
microk8s installs a barebones upstream Kubernetes. This means just the api-server, controller-manager, scheduler, kubelet, cni, kube-proxy are installed and run. Additional services like kube-dns and dashboard can be run using the microk8s.enable command.
> microk8s.enable dns dashboard
URL http://127.0.0.1:80/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/overview?namespace=default
> microk8s.kubectl cluster-info
/var/lib/snapd/snap/bin/
> microk8s.kubectl get all --all-namespaces > microk8s.kubectl run nginx --image nginx --replicas 3
> microk8s.kubectl expose deployment nginx --port 80 --target-port 80 --type ClusterIP --selector=run=nginx --name nginx
> microk8s.kubectl get all
> microk8s.kubectl get svc
> curl http://localhost
> microk8s.kubectl delete deployment/nginx
> microk8s.kubectl get all
> microk8s.kubectl delete svc/nginx
> microk8s.inspect
> sudo snap disable microk8s > sudo snap enable microk8s
> microk8s.disable dashboard dns
> sudo snap remove microk8s
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