from nova.exception import ImageNotFound from nova.api.ec2.cloud import CloudController from sfa.util.faults import SfaAPIError from sfa.rspecs.rspec import RSpec from sfa.rspecs.elements.hardware_type import HardwareType from sfa.rspecs.elements.node import Node from sfa.rspecs.elements.sliver import Sliver from sfa.rspecs.elements.login import Login from sfa.rspecs.elements.disk_image import DiskImage from sfa.rspecs.elements.services import Services from sfa.util.xrn import Xrn from sfa.util.osxrn import OSXrn from sfa.rspecs.version_manager import VersionManager def disk_image_to_rspec_object(image): img = DiskImage() img['name'] = image['name'] img['description'] = image['name'] img['os'] = image['name'] img['version'] = image['name'] return img class OSAggregate: def __init__(self, driver): self.driver = driver def instance_to_sliver(self, instance, slice_xrn=None): # should include? # * instance.image_ref # * instance.kernel_id # * instance.ramdisk_id import nova.db.sqlalchemy.models name=None type=None sliver_id = None if isinstance(instance, dict): # this is an isntance type dict name = instance['name'] type = instance['name'] elif isinstance(instance, nova.db.sqlalchemy.models.Instance): # this is an object that describes a running instance name = instance.display_name type = instance.instance_type.name else: raise SfaAPIError("instnace must be an instance_type dict or" + \ " a nova.db.sqlalchemy.models.Instance object") if slice_xrn: xrn = Xrn(slice_xrn, 'slice') sliver_id = xrn.get_sliver_id(instance.project_id, instance.hostname, instance.id) sliver = Sliver({'slice_id': sliver_id, 'name': name, 'type': 'plos-' + type, 'tags': []}) return sliver def get_machine_image_details(self, image): """ Returns a dict that contains the ami, aki and ari details for the specified ami image. """ disk_image = {} if image['container_format'] == 'ami': disk_image['ami'] = image disk_image['aki'] = self.driver.shell.image_manager.show(image['kernel_id']) disk_image['ari'] = self.driver.shell.image_manager.show(image['ramdisk_id']) return disk_image def get_disk_image(self, id=None, name=None): """ Look up a image bundle using the specifeid id or name """ disk_image = None try: if id: image = self.driver.shell.image_manager.show(image_id) elif name: image = self.driver.shell.image_manager.show_by_name(image_name) if image['container_format'] == 'ami': disk_image = self.get_machine_image_details(image) except ImageNotFound: pass return disk_image def get_available_disk_images(self): # get image records disk_images = [] for image in self.driver.shell.image_manager.detail(): if image['container_format'] == 'ami': disk_images.append(self.get_machine_image_details(image)) return disk_images def get_rspec(self, slice_xrn=None, version=None, options={}): version_manager = VersionManager() version = version_manager.get_version(version) if not slice_xrn: rspec_version = version_manager._get_version(version.type, version.version, 'ad') nodes = self.get_aggregate_nodes() else: rspec_version = version_manager._get_version(version.type, version.version, 'manifest') nodes = self.get_slice_nodes(slice_xrn) rspec = RSpec(version=rspec_version, user_options=options) rspec.version.add_nodes(nodes) return rspec.toxml() def get_slice_nodes(self, slice_xrn): name = OSXrn(xrn = slice_xrn).name instances = self.driver.shell.db.instance_get_all_by_project(name) rspec_nodes = [] for instance in instances: rspec_node = Node() xrn = OSXrn(instance.hostname, 'node') rspec_node['component_id'] = xrn.urn rspec_node['component_name'] = xrn.name rspec_node['component_manager_id'] = Xrn(self.driver.hrn, 'authority+cm').get_urn() sliver = self.instance_to_sliver(instance) disk_image = self.get_disk_image(instance.image_ref) sliver['disk_images'] = [disk_image_to_rspec_object(disk_image)] rspec_node['slivers'] = [sliver] rspec_nodes.append(rspec_node) return rspec_nodes def get_aggregate_nodes(self): zones = self.driver.shell.db.zone_get_all() if not zones: zones = ['cloud'] else: zones = [zone.name for zone in zones] # available sliver/instance/vm types instances = self.driver.shell.db.instance_type_get_all().values() # available images disk_images = self.get_available_disk_images() disk_image_objects = [disk_image_to_rspec_object(image) \ for image in disk_image] rspec_nodes = [] for zone in zones: rspec_node = Node() xrn = OSXrn(zone, 'node') rspec_node['component_id'] = xrn.urn rspec_node['component_name'] = xrn.name rspec_node['component_manager_id'] = Xrn(self.driver.hrn, 'authority+cm').get_urn() rspec_node['exclusive'] = 'false' rspec_node['hardware_types'] = [HardwareType({'name': 'plos-pc'}), HardwareType({'name': 'pc'})] slivers = [] for instance in instances: sliver = self.instance_to_sliver(instance) sliver['disk_images'] = disk_image_objects slivers.append(sliver) rspec_node['slivers'] = slivers rspec_nodes.append(rspec_node) return rspec_nodes def create_project(self, slicename, users, options={}): """ Create the slice if it doesn't alredy exist """ import nova.exception.ProjectNotFound try: slice = self.driver.shell.auth_manager.get_project(slicename) except nova.exception.ProjectNotFound: # convert urns to user names usernames = [Xrn(user['urn']).get_leaf() for user in users] # assume that the first user is the project manager proj_manager = usernames[0] self.driver.shell.auth_manager.create_project(slicename, proj_manager) def create_project_users(self, slicename, users, options={}): """ Add requested users to the specified slice. """ # There doesn't seem to be an effcient way to # look up all the users of a project, so lets not # attempt to remove stale users . For now lets just # ensure that the specified users exist for user in users: username = Xrn(user['urn']).get_leaf() try: self.driver.shell.auth_manager.get_user(username) except nova.exception.UserNotFound: self.driver.shell.auth_manager.create_user(username) self.verify_user_keys(username, user['keys'], options) def verify_user_keys(self, username, keys, options={}): """ Add requested keys. """ append = options.get('append', True) existing_keys = self.driver.shell.db.key_pair_get_all_by_user(username) existing_pub_keys = [key.public_key for key in existing_keys] removed_pub_keys = set(existing_pub_keys).difference(keys) added_pub_keys = set(keys).difference(existing_pub_keys) pubkeys = [] # add new keys for public_key in added_pub_keys: key = {} key['user_id'] = username key['name'] = username key['public'] = public_key self.driver.shell.db.key_pair_create(key) # remove old keys if not append: for key in existing_keys: if key.public_key in removed_pub_keys: self.driver.shell.db.key_pair_destroy(username, key.name) def reserve_instance(self, image_id, kernel_id, ramdisk_id, \ instance_type, key_name, user_data): conn = self.driver.euca_shell logger.info('Reserving an instance: image: %s, kernel: ' \ '%s, ramdisk: %s, type: %s, key: %s' % \ (image_id, kernel_id, ramdisk_id, instance_type, key_name)) try: reservation = conn.run_instances(image_id=image_id, kernel_id=kernel_id, ramdisk_id=ramdisk_id, instance_type=instance_type, key_name=key_name, user_data = user_data) except EC2ResponseError, ec2RespError: logger.log_exc(ec2RespError) def run_instances(self, slicename, rspec, keyname, pubkeys): """ Create the instances thats requested in the rspec """ # the default image to use for instnaces that dont # explicitly request an image. # Just choose the first available image for now. available_images = self.get_available_disk_images() default_image = self.get_disk_images()[0] default_ami_id = CloudController.image_ec2_id(default_image['ami']['id']) default_aki_id = CloudController.image_ec2_id(default_image['aki']['id']) default_ari_id = CloudController.image_ec2_id(default_image['ari']['id']) # get requested slivers rspec = RSpec(rspec) requested_instances = defaultdict(list) # iterate over clouds/zones/nodes for node in rspec.version.get_nodes_with_slivers(): instance_types = node.get('slivers', []) if isinstance(instance_types, list): # iterate over sliver/instance types for instance_type in instance_types: ami_id = default_ami_id aki_id = default_aki_id ari_id = default_ari_id req_image = instance_type.get('disk_images') if req_image and isinstance(req_image, list): req_image_name = req_image[0]['name'] disk_image = self.get_disk_image(name=req_image_name) if disk_image: ami_id = CloudController.image_ec2_id(disk_image['ami']['id']) aki_id = CloudController.image_ec2_id(disk_image['aki']['id']) ari_id = CloudController.image_ec2_id(disk_image['ari']['id']) # start the instance self.reserve_instance(ami_id, aki_id, ari_id, \ instance_type['name'], keyname, pubkeys)