Delete AWS VPC including dependencies

delete-all-vpcs-in-region.sh

#!/bin/bash -eu
#
# List all VPCs in region and delete them

main(){
    if [ -z "$1" ]; then
        echo "Usage: $0 <region> [<region> ...]"
        exit 64
    fi

    for region in "$@"; do
        clear_region "$region"
    done
}

clear_region(){
    export AWS_DEFAULT_REGION="$1"
    echo "Clearing region: $AWS_DEFAULT_REGION..."
    vpcs=($(aws ec2 describe-vpcs --query="Vpcs[].VpcId" --output=text))
    vpcc=${#vpcs[@]}
    echo "Found $vpcc VPC[s]: ${vpcs[@]}"
    i=0
    for vpc in "${vpcs[@]}"; do
        i=$((i+1))
        delete_vpc "$vpc" $i $vpcc
    done
}

delete_vpc(){
    wait=0
    vpc=$1
    echo -n "Deleting VPC $2 of $3 '$vpc'"
    if [[ $wait -gt 0 ]]; then
        echo -n " in $wait seconds. Press Ctrl-C to stop."
        sleep $wait
    fi
    echo
    ./delete-vpc.sh $vpc
}

main "$@"

delete-vpc.sh

#!/bin/bash -eux
#
# Delete a VPC and its dependencies

if [ -z "$1" ]; then
    echo "Usage: $0 <vpcid>"
    exit 64
fi
vpcid="$1"

# Delete subnets
for i in `aws ec2 describe-subnets --filters Name=vpc-id,Values="${vpcid}" | grep subnet- | sed -E 's/^.*(subnet-[a-z0-9]+).*$/\1/'`; do
    aws ec2 delete-subnet --subnet-id=$i
done

# Detach internet gateways
for i in `aws ec2 describe-internet-gateways --filters Name=attachment.vpc-id,Values="${vpcid}" | grep igw- | sed -E 's/^.*(igw-[a-z0-9]+).*$/\1/'`; do
    aws ec2 detach-internet-gateway --internet-gateway-id=$i --vpc-id=${vpcid}
done

# Delete internet gateways
for i in `aws ec2 describe-internet-gateways --filters Name=attachment.vpc-id,Values="${vpcid}" | grep igw- | sed -E 's/^.*(igw-[a-z0-9]+).*$/\1/'`; do
    aws ec2 delete-internet-gateway --internet-gateway-id=$i
done

# Delete security groups (ignore message about being unable to delete default security group)
for i in `aws ec2 describe-security-groups --filters Name=vpc-id,Values="${vpcid}" | grep sg- | sed -E 's/^.*(sg-[a-z0-9]+).*$/\1/' | sort | uniq`; do
    aws ec2 delete-security-group --group-id $i > /dev/null 2>&1 || true
done

# Delete the VPC
aws ec2 delete-vpc --vpc-id ${vpcid}

regions.txt

ap-south-1
eu-north-1
ap-northeast-2
ap-northeast-1
sa-east-1
ca-central-1
ap-southeast-1
ap-southeast-2
eu-central-1

Get all regions like so:

aws ec2 describe-regions --query='Regions[].RegionName' --output=text | tr '\t' '\n' | sort > regions.txt

DO NOT FORGET TO REMOVE REGIONS YOU WANT TO LEAVE UNTOUCHED!!!