sfa/openstack/osaggregate.py

   1 from nova.exception import ImageNotFound
   2 from nova.api.ec2.cloud import CloudController
   3 from sfa.util.faults import SfaAPIError
   4 from sfa.rspecs.rspec import RSpec
   5 from sfa.rspecs.elements.hardware_type import HardwareType
   6 from sfa.rspecs.elements.node import Node
   7 from sfa.rspecs.elements.sliver import Sliver
   8 from sfa.rspecs.elements.login import Login
   9 from sfa.rspecs.elements.disk_image import DiskImage
  10 from sfa.rspecs.elements.services import Services
  11 from sfa.util.xrn import Xrn
  12 from sfa.util.osxrn import OSXrn
  13 from sfa.rspecs.version_manager import VersionManager
  14
  15
  16 def disk_image_to_rspec_object(image):
  17     img = DiskImage()
  18     img['name'] = image['name']
  19     img['description'] = image['name']
  20     img['os'] = image['name']
  21     img['version'] = image['name']
  22     return img
  23
  24
  25 def instance_to_sliver(instance, slice_xrn=None):
  26     # should include?
  27     # * instance.image_ref
  28     # * instance.kernel_id
  29     # * instance.ramdisk_id
  30     import nova.db.sqlalchemy.models
  31     name=None
  32     type=None
  33     sliver_id = None
  34     if isinstance(instance, dict):
  35         # this is an isntance type dict
  36         name = instance['name']
  37         type = instance['name']
  38     elif isinstance(instance, nova.db.sqlalchemy.models.Instance):
  39         # this is an object that describes a running instance
  40         name = instance.display_name
  41         type = instance.instance_type.name
  42     else:
  43         raise SfaAPIError("instnace must be an instance_type dict or" + \
  44                            " a nova.db.sqlalchemy.models.Instance object")
  45     if slice_xrn:
  46         xrn = Xrn(slice_xrn, 'slice')
  47         sliver_id = xrn.get_sliver_id(instance.project_id, instance.hostname, instance.id)
  48
  49     sliver = Sliver({'slice_id': sliver_id,
  50                      'name': name,
  51                      'type': 'plos-' + type,
  52                      'tags': []})
  53     return sliver
  54
  55
  56 class OSAggregate:
  57
  58     def __init__(self, driver):
  59         self.driver = driver
  60
  61     def get_machine_image_details(self, image):
  62         """
  63         Returns a dict that contains the ami, aki and ari details for the specified
  64         ami image.
  65         """
  66         disk_image = {}
  67         if image['container_format'] == 'ami':
  68             disk_image['ami'] = image
  69             disk_image['aki'] = self.driver.shell.image_manager.show(image['kernel_id'])
  70             disk_image['ari'] = self.driver.shell.image_manager.show(image['ramdisk_id'])
  71         return disk_image
  72
  73     def get_disk_image(self, id=None, name=None):
  74         """
  75         Look up a image bundle using the specifeid id or name
  76         """
  77         disk_image = None
  78         try:
  79             if id:
  80                 image = self.driver.shell.image_manager.show(image_id)
  81             elif name:
  82                 image = self.driver.shell.image_manager.show_by_name(image_name)
  83             if image['container_format'] == 'ami':
  84                 disk_image = self.get_machine_image_details(image)
  85         except ImageNotFound:
  86                 pass
  87         return disk_image
  88
  89     def get_available_disk_images(self):
  90         # get image records
  91         disk_images = []
  92         for image in self.driver.shell.image_manager.detail():
  93             if image['container_format'] == 'ami':
  94                 disk_images.append(self.get_machine_image_details(image))
  95         return disk_images
  96
  97     def get_rspec(self, slice_xrn=None, version=None, options={}):
  98         version_manager = VersionManager()
  99         version = version_manager.get_version(version)
 100         if not slice_xrn:
 101             rspec_version = version_manager._get_version(version.type, version.version, 'ad')
 102             nodes = self.get_aggregate_nodes()
 103         else:
 104             rspec_version = version_manager._get_version(version.type, version.version, 'manifest')
 105             nodes = self.get_slice_nodes(slice_xrn)
 106         rspec = RSpec(version=rspec_version, user_options=options)
 107         rspec.version.add_nodes(nodes)
 108         return rspec.toxml()
 109
 110     def get_slice_nodes(self, slice_xrn):
 111         name = OSXrn(xrn = slice_xrn).name
 112         instances = self.driver.shell.db.instance_get_all_by_project(name)
 113         rspec_nodes = []
 114         for instance in instances:
 115             rspec_node = Node()
 116             xrn = OSXrn(instance.hostname, 'node')
 117             rspec_node['component_id'] = xrn.urn
 118             rspec_node['component_name'] = xrn.name
 119             rspec_node['component_manager_id'] = Xrn(self.driver.hrn, 'authority+cm').get_urn()
 120             sliver = instance_to_sliver(instance)
 121             disk_image = self.get_disk_image(instance.image_ref)
 122             sliver['disk_images'] = [disk_image_to_rspec_object(disk_image)]
 123             rspec_node['slivers'] = [sliver]
 124             rspec_nodes.append(rspec_node)
 125         return rspec_nodes
 126
 127     def get_aggregate_nodes(self):
 128
 129         zones = self.driver.shell.db.zone_get_all()
 130         if not zones:
 131             zones = ['cloud']
 132         else:
 133             zones = [zone.name for zone in zones]
 134
 135         # available sliver/instance/vm types
 136         instances = self.driver.shell.db.instance_type_get_all().values()
 137         # available images
 138         disk_images = self.get_available_disk_images()
 139         disk_image_objects = [disk_image_to_rspec_object(image) \
 140                                for image in disk_image]
 141         rspec_nodes = []
 142         for zone in zones:
 143             rspec_node = Node()
 144             xrn = OSXrn(zone, 'node')
 145             rspec_node['component_id'] = xrn.urn
 146             rspec_node['component_name'] = xrn.name
 147             rspec_node['component_manager_id'] = Xrn(self.driver.hrn, 'authority+cm').get_urn()
 148             rspec_node['exclusive'] = 'false'
 149             rspec_node['hardware_types'] = [HardwareType({'name': 'plos-pc'}),
 150                                                 HardwareType({'name': 'pc'})]
 151             slivers = []
 152             for instance in instances:
 153                 sliver = instance_to_sliver(instance)
 154                 sliver['disk_images'] = disk_image_objects
 155                 slivers.append(sliver)
 156
 157             rspec_node['slivers'] = slivers
 158             rspec_nodes.append(rspec_node)
 159
 160         return rspec_nodes
 161
 162
 163     def create_project(self, slicename, users, options={}):
 164         """
 165         Create the slice if it doesn't alredy exist
 166         """
 167         import nova.exception.ProjectNotFound
 168         try:
 169             slice = self.driver.shell.auth_manager.get_project(slicename)
 170         except nova.exception.ProjectNotFound:
 171             # convert urns to user names
 172             usernames = [Xrn(user['urn']).get_leaf() for user in users]
 173             # assume that the first user is the project manager
 174             proj_manager = usernames[0]
 175             self.driver.shell.auth_manager.create_project(slicename, proj_manager)
 176
 177     def create_project_users(self, slicename, users, options={}):
 178         """
 179         Add requested users to the specified slice.
 180         """
 181
 182         # There doesn't seem to be an effcient way to
 183         # look up all the users of a project, so lets not
 184         # attempt to remove stale users . For now lets just
 185         # ensure that the specified users exist
 186         for user in users:
 187             username = Xrn(user['urn']).get_leaf()
 188             try:
 189                 self.driver.shell.auth_manager.get_user(username)
 190             except nova.exception.UserNotFound:
 191                 self.driver.shell.auth_manager.create_user(username)
 192             self.verify_user_keys(username, user['keys'], options)
 193
 194
 195     def verify_user_keys(self, username, keys, options={}):
 196         """
 197         Add requested keys.
 198         """
 199         append = options.get('append', True)
 200         existing_keys = self.driver.shell.db.key_pair_get_all_by_user(username)
 201         existing_pub_keys = [key.public_key for key in existing_keys]
 202         removed_pub_keys = set(existing_pub_keys).difference(keys)
 203         added_pub_keys = set(keys).difference(existing_pub_keys)
 204         pubkeys = []
 205         # add new keys
 206         for public_key in added_pub_keys:
 207             key = {}
 208             key['user_id'] = username
 209             key['name'] =  username
 210             key['public'] = public_key
 211             self.driver.shell.db.key_pair_create(key)
 212
 213         # remove old keys
 214         if not append:
 215             for key in existing_keys:
 216                 if key.public_key in removed_pub_keys:
 217                     self.driver.shell.db.key_pair_destroy(username, key.name)
 218
 219     def reserve_instance(self, image_id, kernel_id, ramdisk_id, \
 220                          instance_type, key_name, user_data):
 221         conn  = self.driver.euca_shell
 222         logger.info('Reserving an instance: image: %s, kernel: ' \
 223                     '%s, ramdisk: %s, type: %s, key: %s' % \
 224                     (image_id, kernel_id, ramdisk_id,
 225                     instance_type, key_name))
 226         try:
 227             reservation = conn.run_instances(image_id=image_id,
 228                                              kernel_id=kernel_id,
 229                                              ramdisk_id=ramdisk_id,
 230                                              instance_type=instance_type,
 231                                              key_name=key_name,
 232                                              user_data = user_data)
 233         except EC2ResponseError, ec2RespError:
 234             logger.log_exc(ec2RespError)
 235
 236     def run_instances(self, slicename, rspec, keyname, pubkeys):
 237         """
 238         Create the instances thats requested in the rspec
 239         """
 240         # the default image to use for instnaces that dont
 241         # explicitly request an image.
 242         # Just choose the first available image for now.
 243         available_images = self.get_available_disk_images()
 244         default_image = self.get_disk_images()[0]
 245         default_ami_id = CloudController.image_ec2_id(default_image['ami']['id'])
 246         default_aki_id = CloudController.image_ec2_id(default_image['aki']['id'])
 247         default_ari_id = CloudController.image_ec2_id(default_image['ari']['id'])
 248
 249         # get requested slivers
 250         rspec = RSpec(rspec)
 251         requested_instances = defaultdict(list)
 252         # iterate over clouds/zones/nodes
 253         for node in rspec.version.get_nodes_with_slivers():
 254             instance_types = node.get('slivers', [])
 255             if isinstance(instance_types, list):
 256                 # iterate over sliver/instance types
 257                 for instance_type in instance_types:
 258                     ami_id = default_ami_id
 259                     aki_id = default_aki_id
 260                     ari_id = default_ari_id
 261                     req_image = instance_type.get('disk_images')
 262                     if req_image and isinstance(req_image, list):
 263                         req_image_name = req_image[0]['name']
 264                         disk_image = self.get_disk_image(name=req_image_name)
 265                         if disk_image:
 266                             ami_id = CloudController.image_ec2_id(disk_image['ami']['id'])
 267                             aki_id = CloudController.image_ec2_id(disk_image['aki']['id'])
 268                             ari_id = CloudController.image_ec2_id(disk_image['ari']['id'])
 269                     # start the instance
 270                     self.reserve_instance(ami_id, aki_id, ari_id, \
 271                                           instance_type['name'], keyname, pubkeys)