The cherry on the k8ke

install docker :

curl -sSL get.docker.com | sh && \
sudo usermod pi -aG docker && \
newgrp docker

delete swap

sudo dphys-swapfile swapoff && \
sudo dphys-swapfile uninstall && \
sudo update-rc.d dphys-swapfile remove

modify the file /boot/cmdline.txt by adding at the end :

cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory

then reboot :
sudo reboot

create file /etc/apt/sources.list.d/kubernetes.list within
deb http://apt.kubernetes.io/ kubernetes-xenial main

launch :
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add –

then
sudo apt-get update

 Install kubeadm it will also install kubectl

sudo apt-get install -qy kubeadm

ENJOY !!!!