creating snapshot
aws --profile ${PROFILE} --region eu-west-1 ec2 create-snapshot --volume-id vol-307776c3 --description "SOME_TEXT_snap"
checking snapshot progress
aws --profile ${PROFILE} --region eu-west-1 ec2 describe-snapshots --snapshot-ids snap-064bf6c320edb2cdf
modifying volume, setting disk to 60GB
aws --profile ${PROFILE} --region eu-west-1 ec2 modify-volume --volume-id vol-131a98d1 --size 60
checking volume modification progress
aws --profile ${PROFILE} --region eu-west-1 ec2 describe-volumes-modifications --filters Name=modification-state,Values="optimizing","completed" --query "VolumesModifications[?VolumeId=='vol-131a98d1']"
or
aws --profile ${PROFILE} --region eu-west-1 ec2 describe-volumes-modifications --volume-ids vol-131a98d1