Deregister and delete ami based on tags

deregister-ami

#!/bin/bash

project_name=$1

if [ -z ${project_name} ]; then
    echo "Usage: $0 <project_name>"
    exit 1
fi

regions="$(aws ec2 describe-regions --query "Regions[].RegionName" --output text)"

for region in ${regions[@]}; do
    echo "---- Region: ${region} ---"
    ami_id=$(aws ec2 describe-images --owner self --region ${region} --filters "Name=tag:project, Values=${project_name}" --query "Images[].ImageId" --output text)

    if [ ! -z "${ami_id}" ]; then
        for ami in ${ami_id[@]}; do

            snapshot_id=$(aws ec2 describe-images --image-ids ${ami} --query "Images[].BlockDeviceMappings[].Ebs.SnapshotId" --region "${region}" --output text)

            echo "Deregistering AMI: ${ami}"
            aws ec2 deregister-image --image-id "${ami}" --region ${region}

            echo "Deleting snapshot ${snapshot_id} for AMI ${ami}"
            aws ec2 delete-snapshot --snapshot-id "${snapshot_id}" --region ${region}

        done
    else
        echo "No AMI found"
    fi
done