aguy

#!/bin/bash

REGION=$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | grep region | awk -F\" '{print $4}')
FQDN=$(aws ec2 describe-tags --region $REGION --filters "Name=resource-id,Values=$(curl -s http://169.254.169.254/latest/meta-data/instance-id)" "Name=key,Values=Name" --query Tags[].Value --output text)
HOSTNAME=$(echo $FQDN | cut -d. -f1)
IPADDRESS=$(curl -s http://169.254.169.254/latest/meta-data/local-ipv4)

if [ -z "$HOSTNAME" ]; then
    echo "You forgot to set Hostname in Tag Name."
    exit 0

aguy

#!/bin/bash

set -o errexit # exit on errors
set -o nounset # exit on use of uninitialized variable
set -o errtrace # inherits trap on ERR in function and subshell

trap 'traperror $? $LINENO $BASH_LINENO "$BASH_COMMAND" $(printf "::%s" ${FUNCNAME[@]:-})' ERR
trap 'trapexit $? $LINENO' EXIT

function trapexit() {