aws_delete-default-vpc.sh

#!/usr/bin/env bash

for region in $(aws ec2 describe-regions --region eu-west-1 | jq -r .Regions[].RegionName); do

    echo "* Region ${region}"

    # get default vpc
    vpc=$(aws ec2 --region ${region} describe-vpcs --filter Name=isDefault,Values=true | jq -r .Vpcs[0].VpcId)
    if [ "${vpc}" = "null" ]; then
	echo "No default vpc found"
	continue
    fi
    echo "Found default vpc ${vpc}"
    igw=$(aws ec2 --region ${region} describe-internet-gateways --filter Name=attachment.vpc-id,Values=${vpc} \
	      | jq -r .InternetGateways[0].InternetGatewayId)
    if [ "${igw}" != "null" ]; then
	echo "Detaching and deleting internet gateway ${igw}"
	aws ec2 --region ${region} \
	    detach-internet-gateway --internet-gateway-id ${igw} --vpc-id ${vpc}
	aws ec2 --region ${region} \
	    delete-internet-gateway --internet-gateway-id ${igw}
    fi
    # get subnets
    subnets=$(aws ec2 --region ${region} describe-subnets --filters Name=vpc-id,Values=${vpc} \
		  | jq -r .Subnets[].SubnetId)
    if [ "${subnets}" != "null" ]; then
	for subnet in ${subnets}; do
	    echo "Deleting subnet ${subnet}"
	    aws ec2 --region ${region} \
		delete-subnet --subnet-id ${subnet}
	done
    fi
    echo "Deleting vpc ${vpc}"
    aws ec2 --region ${region} \
	delete-vpc --vpc-id ${vpc}
done