dashboard/src/resource_inventory/resource_manager.py

   1 ##############################################################################
   2 # Copyright (c) 2018 Parker Berberian, Sawyer Bergeron, and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9
  10
  11 from dashboard.exceptions import (
  12     ResourceExistenceException,
  13     ResourceAvailabilityException,
  14     ResourceProvisioningException,
  15     ModelValidationException,
  16 )
  17 from resource_inventory.models import (
  18     Host,
  19     HostConfiguration,
  20     ResourceBundle,
  21     HostProfile,
  22     Network,
  23     Vlan
  24 )
  25
  26
  27 class ResourceManager:
  28
  29     instance = None
  30
  31     def __init__(self):
  32         pass
  33
  34     @staticmethod
  35     def getInstance():
  36         if ResourceManager.instance is None:
  37             ResourceManager.instance = ResourceManager()
  38         return ResourceManager.instance
  39
  40     def getAvailableHostTypes(self, lab):
  41         hostset = Host.objects.filter(lab=lab).filter(booked=False).filter(working=True)
  42         hostprofileset = HostProfile.objects.filter(host__in=hostset, labs=lab)
  43         return set(hostprofileset)
  44
  45     def hostsAvailable(self, grb):
  46         """
  47         This method will check if the given GenericResourceBundle
  48         is available. No changes to the database
  49         """
  50
  51         # count up hosts
  52         profile_count = {}
  53         for host in grb.getHosts():
  54             if host.profile not in profile_count:
  55                 profile_count[host.profile] = 0
  56             profile_count[host.profile] += 1
  57
  58         # check that all required hosts are available
  59         for profile in profile_count.keys():
  60             available = Host.objects.filter(
  61                 booked=False,
  62                 lab=grb.lab,
  63                 profile=profile
  64             ).count()
  65             needed = profile_count[profile]
  66             if available < needed:
  67                 return False
  68         return True
  69
  70     # public interface
  71     def deleteResourceBundle(self, resourceBundle):
  72         for host in Host.objects.filter(bundle=resourceBundle):
  73             self.releaseHost(host)
  74         resourceBundle.delete()
  75
  76     def get_vlans(self, genericResourceBundle):
  77         networks = {}
  78         vlan_manager = genericResourceBundle.lab.vlan_manager
  79         for network in genericResourceBundle.networks.all():
  80             if network.is_public:
  81                 public_net = vlan_manager.get_public_vlan()
  82                 vlan_manager.reserve_public_vlan(public_net.vlan)
  83                 networks[network.name] = public_net.vlan
  84             else:
  85                 vlan = vlan_manager.get_vlan()
  86                 vlan_manager.reserve_vlans(vlan)
  87                 networks[network.name] = vlan
  88         return networks
  89
  90     def convertResourceBundle(self, genericResourceBundle, config=None):
  91         """
  92         Takes in a GenericResourceBundle and 'converts' it into a ResourceBundle
  93         """
  94         resource_bundle = ResourceBundle.objects.create(template=genericResourceBundle)
  95         generic_hosts = genericResourceBundle.getHosts()
  96         physical_hosts = []
  97
  98         vlan_map = self.get_vlans(genericResourceBundle)
  99
 100         for generic_host in generic_hosts:
 101             host_config = None
 102             if config:
 103                 host_config = HostConfiguration.objects.get(bundle=config, host=generic_host)
 104             try:
 105                 physical_host = self.acquireHost(generic_host, genericResourceBundle.lab.name)
 106             except ResourceAvailabilityException:
 107                 self.fail_acquire(physical_hosts, vlan_map)
 108                 raise ResourceAvailabilityException("Could not provision hosts, not enough available")
 109             try:
 110                 physical_host.bundle = resource_bundle
 111                 physical_host.template = generic_host
 112                 physical_host.config = host_config
 113                 physical_hosts.append(physical_host)
 114
 115                 self.configureNetworking(physical_host, vlan_map)
 116             except Exception:
 117                 self.fail_acquire(physical_hosts, vlan_map)
 118                 raise ResourceProvisioningException("Network configuration failed.")
 119             try:
 120                 physical_host.save()
 121             except Exception:
 122                 self.fail_acquire(physical_hosts)
 123                 raise ModelValidationException("Saving hosts failed")
 124
 125         return resource_bundle
 126
 127     def configureNetworking(self, host, vlan_map):
 128         generic_interfaces = list(host.template.generic_interfaces.all())
 129         for int_num, physical_interface in enumerate(host.interfaces.all()):
 130             generic_interface = generic_interfaces[int_num]
 131             physical_interface.config.clear()
 132             for connection in generic_interface.connections.all():
 133                 physical_interface.config.add(
 134                     Vlan.objects.create(
 135                         vlan_id=vlan_map[connection.network.name],
 136                         tagged=connection.vlan_is_tagged,
 137                         public=connection.network.is_public,
 138                         network=connection.network
 139                     )
 140                 )
 141
 142     # private interface
 143     def acquireHost(self, genericHost, labName):
 144         host_full_set = Host.objects.filter(lab__name__exact=labName, profile=genericHost.profile)
 145         if not host_full_set.first():
 146             raise ResourceExistenceException("No matching servers found")
 147         host_set = host_full_set.filter(booked=False)
 148         if not host_set.first():
 149             raise ResourceAvailabilityException("No unbooked hosts match requested hosts")
 150         host = host_set.first()
 151         host.booked = True
 152         host.template = genericHost
 153         host.save()
 154         return host
 155
 156     def releaseHost(self, host):
 157         host.template = None
 158         host.bundle = None
 159         host.booked = False
 160         host.save()
 161
 162     def releaseNetworks(self, grb, vlan_manager, vlans):
 163         for net_name, vlan_id in vlans.items():
 164             net = Network.objects.get(name=net_name, bundle=grb)
 165             if(net.is_public):
 166                 vlan_manager.release_public_vlan(vlan_id)
 167             else:
 168                 vlan_manager.release_vlans(vlan_id)
 169
 170     def fail_acquire(self, hosts, vlans):
 171         grb = hosts[0].template.resource.bundle
 172         vlan_manager = hosts[0].lab.vlan_manager
 173         self.releaseNetworks(grb, vlan_manager, vlans)
 174         for host in hosts:
 175             self.releaseHost(host)