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