This section present the script k8s.sh, also available on https://luc.run/k8s.sh, which allows to create a k8s cluster using kubeadm. It can be used with the default options as follows:

curl https://luc.run/k8s.sh | bash -s

It performs the following actions:

• creation of 2 Ubuntu VMs using Multipass
• installation of the required packages on each VM (kubeadm, containerd, …)
• cluster initialization on the control-plane VM
• join a worker node

It takes a couple of minutes to create the cluster depending upon the number of worker nodes (the script could probably be optimized a bit so that some actions run in parallel).

Once the creation is done you just need to configure your local kubectl with the command provided in the output:

export KUBECONFIG=$PWD/kubeconfig.cfg

Then you can use this newly created cluster and start by listing the nodes (it can take a few tens of seconds for the nodes to reach the Ready status):

kubectl get no

You can download this script and use it locally if you prefer. You can get the available options running it without parameters:

./k8s.sh

Once you’re done using the cluster you can destroy it as follows:

curl https://luc.run/k8s.sh | bash -s -- -D

or if you have retrieved the script locally

./k8s.sh -D