List server and its volumes group by project with novaclient and cinderclient

list_server_volumes_by_project.py

#!/usr/bin/python3
import os
import json
from keystoneauth1.identity import v3
from keystoneauth1 import session
import novaclient.client
import cinderclient.client

import config

def main():
        auth = v3.Password(
                auth_url=os.environ['OS_AUTH_URL'],
                username=os.environ['OS_USERNAME'],
                password=os.environ['OS_PASSWORD'],
                project_name=os.environ['OS_PROJECT_NAME'],
                user_domain_name=os.environ['OS_USER_DOMAIN_NAME'],
                project_domain_name=os.environ['OS_PROJECT_DOMAIN_NAME']
        )
        sess = session.Session(auth=auth, verify=False)
        nova = novaclient.client.Client('2.1', session=sess)
        cinder = cinderclient.client.Client('2', session=sess)

        project_server_volumes = []
        for prj in config.projects:
                d = {'project': prj, 'servers': []}
                servers = nova.servers.list(search_opts={'project_id': prj, 'all_tenants': True})
                for server in servers:
                        sv = server.to_dict()
                        volumes = sv['os-extended-volumes:volumes_attached']
                        d['servers'].append({
                                'id': sv['id'],
                                'name': sv['name'],
                                'volumes': [
                                        {
                                          'id': volume['id'],
                                          'name': cinder.volumes.get(volume['id']).name
                                        } for volume in volumes
                                ]
                        })
                project_server_volumes.append(d)
        print(json.dumps(project_server_volumes, indent=True))
        return

if __name__ == '__main__':
        main()