planetstack/openstack_observer/steps/sync_nodes.py

   1 import os
   2 import base64
   3 import random
   4 from datetime import datetime
   5 from django.db.models import F, Q
   6 from planetstack.config import Config
   7 from observer.openstacksyncstep import OpenStackSyncStep
   8 from core.models.node import Node
   9 from core.models.site import Site, Deployment
  10 from util.logger import Logger, logging
  11
  12 logger = Logger(level=logging.INFO)
  13
  14 class SyncNodes(OpenStackSyncStep):
  15     provides=[Node]
  16     requested_interval=0
  17
  18     def fetch_pending(self, deleted):
  19         # Nodes come from the back end
  20         # You can't delete them
  21         if (deleted):
  22             return []
  23
  24         # collect local nodes
  25         sites = Site.objects.all()
  26         nodes = Node.objects.all()
  27         node_hostnames  = [node.name for node in nodes]
  28
  29         # fetch all nodes from each deployment
  30         deployments = Deployment.objects.all()
  31         new_nodes = []
  32         for deployment in deployments:
  33             try:
  34                 driver = self.driver.admin_driver(deployment=deployment.name)
  35                 compute_nodes = driver.shell.nova.hypervisors.list()
  36             except:
  37                 logger.log_exc("Failed to get nodes from deployment %s" % str(deployment))
  38                 continue
  39
  40             for compute_node in compute_nodes:
  41                 if compute_node.hypervisor_hostname not in node_hostnames:
  42                     # XX TODO:figure out how to correctly identify a node's site.
  43                     # XX pick a random site to add the node to for now
  44                     site_index = random.randint(0, len(sites))
  45                     node = Node(name=compute_node.hypervisor_hostname,
  46                                 site=sites[site_index], deployment=deployment)
  47                     new_nodes.append(node)
  48
  49         return new_nodes
  50
  51
  52     def sync_record(self, node):
  53         node.save()
  54