instances-per-tenant.py

#!/usr/bin/python
# Example output:
#   7 foo
#  32 bar
#  33 some
#  32 example
__author__ = "Felipe Reyes <[email protected]>"
import os
from collections import defaultdict
from novaclient import client
from keystoneauth1.identity import v2
from keystoneauth1 import session
from keystoneclient.v2_0 import client as kclient

username = os.environ['OS_USERNAME']
password = os.environ['OS_PASSWORD']
tenant_name = os.environ['OS_TENANT_NAME']
auth_url = os.environ['OS_AUTH_URL']
auth = v2.Password(username=username, password=password,
                   tenant_name=tenant_name, auth_url=auth_url)
sess = session.Session(auth=auth)
keystone = kclient.Client(session=sess)


c = client.Client(2, username,
                  password,
                  tenant_name,
                  auth_url)

tenants = defaultdict(int)
for server in c.servers.list(search_opts={'all_tenants': True}):
    tenants[getattr(server, 'tenant_id')] += 1


for k, v in tenants.items():
    print('{:>3} {}'.format(v, keystone.tenants.get(k).name))