Purge AMI images and their snapshots

purge-ami-images

# get a list of AMI Images in a region
aws ec2 describe-images --owners self --filters "Name=tag:name,Values=PMM2 Server*" --region us-east-1 --output json | jq '.Images' > ~/IMAGES.json

# save just AMI IDs and their snapshot IDs
jq -r '.[] | .ImageId + " " + .BlockDeviceMappings[1].Ebs.SnapshotId' IMAGES.json > IMAGES_AND_SNAPSHOTS.txt

# first deregister the image
for AMI_ID in $(cat IMAGES_AND_SNAPSHOTS.txt); do
  if [[ "$AMI_ID" =~ snap-* ]]; then
    continue
  fi
  echo "Deregistering AMI ID: $AMI_ID ..."
	aws ec2 deregister-image --image-id $AMI_ID && echo "AMI ID: $AMI_ID deregistered." || echo "Error: could not deregister AMI ID: $AMI_ID"
  sleep 2
done

# wait until the snapshots become available for deletion
sleep 120

# then delete its snapshot
for SNAPSHOT_ID in $(cat IMAGES_AND_SNAPSHOTS.txt); do
  if [[ "$SNAPSHOT_ID" =~ ami-* ]]; then
    continue
  fi
  echo "Deleting snapshot ID: $SNAPSHOT_ID ..."
	aws ec2 delete-snapshot --snapshot-id $SNAPSHOT_ID && echo "Snapshot ID: $SNAPSHOT_ID deleted." || echo "Error: could not delete snapshot ID: $SNAPSHOT_ID"
done