Installing a single node Kubernetes on Ubuntu with kubeadm

install-k8s-ubuntu.sh

# 1) Install Kubernetes on a Ubuntu machine
sudo -i
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
echo 'deb http://apt.kubernetes.io/ kubernetes-xenial main' >> /etc/apt/sources.list.d/kubernetes.list
apt update && apt install -y docker.io kubelet kubeadm kubectl
sudo systemctl enable docker.service
kubeadm init --pod-network-cidr=10.244.0.0/16  # Flannel pod network, see below
exit

# 2) Prepare kubectl
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
echo "source <(kubectl completion bash); alias k=kubectl; complete -F __start_kubectl k" >> .bashrc && exec $SHELL

# 3) Finalize K8s config 
kubectl cluster-info 
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl taint nodes --all node-role.kubernetes.io/master-
kubectl get nodes -o wide

# For details, see: 
# - https://kubernetes.io/docs/setup/independent/install-kubeadm/
# - https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/