Short script to automatically register a new Kubernetes node with the ZeroTier One API

zt-authorize-node.sh

#!/bin/bash 

set -e

[ -z ${ZT_API_TOKEN} ] && echo "Missing API token" && exit 1
[ -z ${ZT_NETWORK_ID} ] && echo "Missing network ID" && exit 1

which zerotier-cli # Check whether the zerotier-cli is installed...

if [ $? -ne 0 ]; then
  curl -s 'https://pgp.mit.edu/pks/lookup?op=get&search=0x1657198823E52A61' | gpg --import && \
  if z=$(curl -s 'https://install.zerotier.com/' | gpg); then echo "$z" | sudo bash; fi
fi

nodeID=$(sudo zerotier-cli info | awk '{print $3}')

# Send request to preauthorize this node on our network
curl \
  -XPOST \
  -H "Authorization: Bearer ${ZT_API_TOKEN}" \
  -d "{\"name\":\"$(curl -s 169.254.169.254/latest/meta-data/instance-id)\",\"config\":{\"authorized\":true}}" \
  "https://my.zerotier.com/api/network/${ZT_NETWORK_ID}/member/${nodeID}"
  
sleep 1

sudo zerotier-cli join ${ZT_NETWORK_ID}