Convert AWS EBS volumes in a region to gp3

gp3.sh

# you can save a bit of money and sometimes get better performance by upgrading older volume types to gp3.
# this script can update all volumes in a region; it's a "hot" upgrade so can be done on all.
# though you may wish to set a filter: in this examples, only update gp2 types are touched (--filter Name=volume-type,Values=gp2)
# this script takes one optional argument: region (default us-east-1)
# be sure to run "aws configure" and set a key pair or set an IAM role that can modify EBS volumes
#!/bin/bash
r=${1:-us-east-1}
for v in $(aws ec2 describe-volumes --query 'Volumes[*].[VolumeId]' --region $r --output text --filter Name=volume-type,Values=gp2)
do
  echo $v
  aws ec2 modify-volume --region $r --volume-id $v --volume-type gp3
done