Attach all volumes in a given AWS availability zone to a single instance in that zone.

attach-all-volumes.bash

#!/bin/bash

ZONE=$1
INSTANCE_ID=$2

letter=b
for vol in $(aws ec2 describe-volumes --filters Name=status,Values=available Name=availability-zone,Values=$ZONE --query "Volumes[*].{ID:VolumeId}" --output text); do
  aws ec2 attach-volume --volume-id $vol --instance-id $INSTANCE_ID --device /dev/sd${letter}
  letter=$(echo "$letter" | tr "0-9a-z" "1-9a-z_")
done