list instance volumes using openstack client from bash

list_volumes_by_instance.sh

#!/bin/bash

for prj in $(jq -r .[] projects.json)
do
        instance_uuids=$(openstack server list -f json --project $prj | jq -r ".[].ID")
        for instance_uuid in $instance_uuids
        do
                instance_json=$(openstack server show $instance_uuid -f json)
                echo $instance_json | jq '{uuid: .id, instance: ."OS-EXT-SRV-ATTR:instance_name", volumes: ."os-extended-volumes:volumes_attached"}'
        done
done