planetstack/ec2_observer/steps/sync_nodes.py

   1 import os
   2 import base64
   3 import random
   4 import time
   5 from datetime import datetime
   6 from django.db.models import F, Q
   7 from planetstack.config import Config
   8 from ec2_observer.syncstep import SyncStep
   9 from core.models.node import Node
  10 from core.models.site import *
  11 from ec2_observer.awslib import *
  12 import pdb
  13
  14 class SyncNodes(SyncStep):
  15     provides=[Node]
  16     requested_interval=0
  17
  18     def fetch_pending(self, deletion):
  19         if (deletion):
  20             return []
  21
  22         deployment = Deployment.objects.filter(Q(name="Amazon EC2"))[0]
  23         current_site_deployments = SiteDeployment.objects.filter(Q(deployment=deployment))
  24
  25         zone_ret = aws_run('ec2 describe-availability-zones')
  26         zones = zone_ret['AvailabilityZones']
  27
  28         # collect local nodes
  29         instance_types = 'm1.small | m1.medium | m1.large | m1.xlarge | m3.medium | m3.large | m3.xlarge | m3.2xlarge'.split(' | ')
  30
  31         all_new_nodes = []
  32         for sd in current_site_deployments:
  33             s = sd.site
  34             current_fqns = [n.name for n in s.nodes.all()]
  35             all_fqns = ['.'.join([n,s.name]) for n in instance_types]
  36             new_node_names = list(set(all_fqns) - set(current_fqns))
  37
  38             new_nodes = []
  39             for node_name in new_node_names:
  40                 node = Node(name=node_name,
  41                             site=s,deployment=deployment)
  42                 new_nodes.append(node)
  43
  44             all_new_nodes.extend(new_nodes)
  45
  46         return all_new_nodes
  47
  48
  49     def sync_record(self, node):
  50         node.save()
  51