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# ------------------------------------------------------------------------------------------------------------------------
# We are explicitly not using a templating language to inject the values as to encourage the user to limit their
# use of templating logic in these files. By design all injected values should be able to be set at runtime,
# and the shell script real work. If you need conditional logic, write it in bash or make another shell script.
# ------------------------------------------------------------------------------------------------------------------------
# Specify the Kubernetes version to use.
# Obtain Droplet IP addresses.
HOSTNAME=$(curl -s
PRIVATEIP=$(curl -s
PUBLICIP=$(curl -s
VPNIP=$(ip addr show dev tun0 | awk '/inet / {print $2}' | cut -d"/" -f1)
echo $VPNIP > /tmp/.ip
# Add Kubernetes repository.
curl -s | sudo apt-key add -
touch /etc/apt/sources.list.d/kubernetes.list
sh -c 'echo "deb kubernetes-xenial main" > /etc/apt/sources.list.d/kubernetes.list'
# Install packages.
apt-get update -y
apt-get install -y \
socat \
ebtables \ \
apt-transport-https \
kubelet=${KUBERNETES_VERSION}-00 \
kubeadm=${KUBERNETES_VERSION}-00 \
kubernetes-cni=${KUBERNETES_CNI}-00 \
cloud-utils \
# Enable and start Docker.
systemctl enable docker
systemctl start docker
# Specify node IP for kubelet.
echo "Environment=\"KUBELET_EXTRA_ARGS=--node-ip=${PUBLICIP}\"" >> /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
systemctl daemon-reload
systemctl restart kubelet
# Parse kubicorn configuration file.
TOKEN=$(cat /etc/kubicorn/cluster.json | jq -r '.values.itemMap.INJECTEDTOKEN')
MASTER=$(cat /etc/kubicorn/cluster.json | jq -r '.values.itemMap.INJECTEDMASTER')
# Join node a cluster.
kubeadm reset
kubeadm join --node-name ${HOSTNAME} --token ${TOKEN} ${MASTER} --discovery-token-unsafe-skip-ca-verification