init-master.bash

#!/bin/bash
#
# Usage: sudo -E ./init-master.bash [pod_network_type]
#
set -e

# Read Pod Network type from first arg (default to Weave)
POD_NETWORK="${1:-weave}"

POD_NETWORK_CIDR=10.244.0.0/16

# Deploy Kubernetes cluster
kubeadm init --pod-network-cidr=${POD_NETWORK_CIDR} && \
  mkdir -p $HOME/.kube && \
  cp --remove-destination /etc/kubernetes/admin.conf $HOME/.kube/config && \
  chown ${SUDO_UID} -R $HOME/.kube

if [ "$POD_NETWORK" == "flannel" ]; then
	# Install flannel
	kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
elif [ "$POD_NETWORK" == "weave" ]; then
	# Install weave
	# From https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/
	sysctl net.bridge.bridge-nf-call-iptables=1
	kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')&env.IPALLOC_RANGE=${POD_NETWORK_CIDR}"
else
	echo "Unsupported pod network: $POD_NETWORK"
	echo "Please choose a supported network type from one of the following: flannel weave"
	exit 1
fi

# Make master node a running worker node too!
# FIXME: Use taint tolerations instead in the future
kubectl taint nodes --all node-role.kubernetes.io/master-

# Install Helm 3 and deploy NGINX Ingress Controller
curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash && \
  helm repo add stable https://charts.helm.sh/stable && \
  helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx && \
  helm repo update && \
  helm upgrade --install ingress ingress-nginx/ingress-nginx -n kube-system --set controller.hostPort.enabled=true --set controller.kind=Deployment