Little script that creates volumes, tag them and attach the volumes to several instances

aws_create_tag_attach_volume.sh

# Little script that creates volumes, tag them and attach the volumes to several instances
for i in {1..4} ; do
  for srv in db0$i db0$i ; do
    srvid=$(aws ec2 describe-instances --filters "Name=tag:hostname,Values=${srv}" 'Name=vpc-id,Values=vpc-123456' --output text --query 'Reservations[].Instances[].InstanceId')
    for dev in f g ; do
      volid=$(aws ec2 create-volume --size 1024 --availability-zone us-east-1d --volume-type standard --output json | jq '.VolumeId' | tr -d '"')
      aws ec2 create-tags --resources ${volid} --tags Key=hostname,Value=${srv} Key=vpc-id,Value=vpc-123456 Key=device,Value=/dev/sd${dev}
      while true ; do
        status=$(aws ec2 describe-volumes --volume-id ${volid} --query 'Volumes[].State' --output text)
        if [ "${status}" = "available" ] ; then
          break
        else
          echo "Volume ${volid} not ready yet (${status}). Waiting 10 seconds and retrying."
          sleep 10
        fi
      done
      echo "Attaching volume ${volid} to instance ${srvid} (${srv}) as device /dev/sd${dev}"
      aws ec2 attach-volume --volume-id ${volid} --instance-id ${srvid} --device /dev/sd${dev}
    done
  done
done