helper.sh

#script to get central manager from EC2 metadata server
USER_DATA=`curl -s http://169.254.169.254/2009-04-04/user-data`
SPLIT_DATA=`echo $USER_DATA | awk -F"," '{print $1}'`
 
for item in ${SPLIT_DATA}; do
  key=`echo $item | sed s/=.*//`
  value=`echo $item | sed s/.*=//`
  if [ $key == "central_manager" ]; then
    CENTRAL_MANAGER=$value
  fi
done

AVAILABILITY_ZONE=`curl -s http://instance-data.ec2.internal/latest/meta-data/placement/availability-zone`
PUBLIC_IP=`curl -s http://instance-data.ec2.internal/latest/meta-data/public-ipv4`
PRIVATE_IP=`curl -s http://instance-data.ec2.internal/latest/meta-data/local-ipv4`
PUBLIC_HOSTNAME=`curl -s http://instance-data.ec2.internal/latest/meta-data/public-hostname`

echo Setting Hostname to $PUBLIC_HOSTNAME 1>&2
hostname $PUBLIC_HOSTNAME

echo COLLECTOR_HOST = $CENTRAL_MANAGER
echo PRIVATE_NETWORK_NAME = amazon-ec2-$AVAILABILITY_ZONE
echo TCP_FORWARDING_HOST = $PUBLIC_IP
echo PRIVATE_NETWORKING_INTERFACE = $PRIVATE_IP