useful_scripts/check_openstack.py

#!/usr/bin/env python

import os
import requests
import yaml

from novaclient.client import Client as nova_auth
from keystoneclient.v3.client import Client as keystone_auth

def get_credentials():
    with open('/home/arif/clouds.yaml','r') as stream:
        creds = yaml.safe_load(stream)['clouds']['arif-home']['auth']

    creds['version'] = '2'
    return creds

def get_auth_token():
    creds = get_credentials()
    keystone_client = keystone_auth(**creds)
    
    return keystone_client.auth_token

def get_servers():
    creds = get_credentials()
    nova_client = nova_auth(**creds)

    print(nova_client.servers.list())

def get_cores():
    url="http://placement.example.com:8778"

    token = get_auth_token()

    headers = {}
    headers['content-type'] = 'application/json'
    headers['x-auth-token'] = token

    request = "/resource_providers"

    r = requests.get("{}/{}".format(url,request),headers=headers)

    for res in r.json()['resource_providers']:
      uuid = res['uuid']
      hostname = res['name']

      request = "/resource_providers/{}/inventories".format(uuid)
    
      r = requests.get("{}/{}".format(url,request),headers=headers)

      inventory = r.json()['inventories']

      cores=0

      if 'VCPU' in inventory:
        cores+=inventory['VCPU']['total']
      if 'PCPU' in inventory:
        cores+=inventory['PCPU']['total']


      print("{}: {}".format(hostname,cores))

def main():
    get_servers()
    get_cores()

if __name__ == '__main__':
    main()