Source code for yardstick.benchmark.contexts.model

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# Copyright (c) 2015 Ericsson AB and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
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""" Logical model

"""


[docs]class Object(object): '''Base class for classes in the logical model Contains common attributes and methods ''' def __init__(self, name, context): # model identities and reference self.name = name self._context = context # stack identities self.stack_name = None self.stack_id = None @property def dn(self): '''returns distinguished name for object''' return self.name + "." + self._context.name
[docs]class PlacementGroup(Object): '''Class that represents a placement group in the logical model Concept comes from the OVF specification. Policy should be one of "availability" or "affinity (there are more but they are not supported)" ''' map = {} def __init__(self, name, context, policy): if policy not in ["affinity", "availability"]: raise ValueError("placement group '%s', policy '%s' is not valid" % (name, policy)) self.name = name self.members = set() self.stack_name = context.name + "-" + name self.policy = policy PlacementGroup.map[name] = self
[docs] def add_member(self, name): self.members.add(name)
@staticmethod
[docs] def get(name): if name in PlacementGroup.map: return PlacementGroup.map[name] else: return None
[docs]class Router(Object): '''Class that represents a router in the logical model''' def __init__(self, name, network_name, context, external_gateway_info): super(self.__class__, self).__init__(name, context) self.stack_name = context.name + "-" + network_name + "-" + self.name self.stack_if_name = self.stack_name + "-if0" self.external_gateway_info = external_gateway_info
[docs]class Network(Object): '''Class that represents a network in the logical model''' list = [] def __init__(self, name, context, attrs): super(self.__class__, self).__init__(name, context) self.stack_name = context.name + "-" + self.name self.subnet_stack_name = self.stack_name + "-subnet" self.subnet_cidr = attrs.get('cidr', '10.0.1.0/24') self.router = None if "external_network" in attrs: self.router = Router("router", self.name, context, attrs["external_network"]) Network.list.append(self)
[docs] def has_route_to(self, network_name): '''determines if this network has a route to the named network''' if self.router and self.router.external_gateway_info == network_name: return True return False
@staticmethod
[docs] def find_by_route_to(external_network): '''finds a network that has a route to the specified network''' for network in Network.list: if network.has_route_to(external_network): return network
@staticmethod
[docs] def find_external_network(): '''return the name of an external network some network in this context has a route to''' for network in Network.list: if network.router: return network.router.external_gateway_info return None
[docs]class Server(Object): '''Class that represents a server in the logical model''' list = [] def __init__(self, name, context, attrs): super(self.__class__, self).__init__(name, context) self.stack_name = self.name + "." + context.name self.keypair_name = context.keypair_name self.secgroup_name = context.secgroup_name self.user = context.user self.context = context self.public_ip = None self.private_ip = None if attrs is None: attrs = {} self.placement_groups = [] placement = attrs.get("placement", []) placement = placement if type(placement) is list else [placement] for p in placement: pg = PlacementGroup.get(p) if not pg: raise ValueError("server '%s', placement '%s' is invalid" % (name, p)) self.placement_groups.append(pg) pg.add_member(self.stack_name) self.instances = 1 if "instances" in attrs: self.instances = attrs["instances"] # dict with key network name, each item is a dict with port name and ip self.ports = {} self.floating_ip = None self.floating_ip_assoc = None if "floating_ip" in attrs: self.floating_ip = {} self.floating_ip_assoc = {} if self.floating_ip is not None: ext_net = Network.find_external_network() assert ext_net is not None self.floating_ip["external_network"] = ext_net self._image = None if "image" in attrs: self._image = attrs["image"] self._flavor = None if "flavor" in attrs: self._flavor = attrs["flavor"] Server.list.append(self) @property def image(self): '''returns a server's image name''' if self._image: return self._image else: return self._context.image @property def flavor(self): '''returns a server's flavor name''' if self._flavor: return self._flavor else: return self._context.flavor def _add_instance(self, template, server_name, networks, scheduler_hints): '''adds to the template one server and corresponding resources''' port_name_list = [] for network in networks: port_name = server_name + "-" + network.name + "-port" self.ports[network.name] = {"stack_name": port_name} template.add_port(port_name, network.stack_name, network.subnet_stack_name, sec_group_id=self.secgroup_name) port_name_list.append(port_name) if self.floating_ip: external_network = self.floating_ip["external_network"] if network.has_route_to(external_network): self.floating_ip["stack_name"] = server_name + "-fip" template.add_floating_ip(self.floating_ip["stack_name"], external_network, port_name, network.router.stack_if_name, self.secgroup_name) self.floating_ip_assoc["stack_name"] = \ server_name + "-fip-assoc" template.add_floating_ip_association( self.floating_ip_assoc["stack_name"], self.floating_ip["stack_name"], server_name) template.add_server(server_name, self.image, self.flavor, ports=port_name_list, user=self.user, key_name=self.keypair_name, scheduler_hints=scheduler_hints)
[docs] def add_to_template(self, template, networks, scheduler_hints=None): '''adds to the template one or more servers (instances)''' if self.instances == 1: server_name = self.stack_name self._add_instance(template, server_name, networks, scheduler_hints=scheduler_hints) else: # TODO(hafe) fix or remove, no test/sample for this for i in range(self.instances): server_name = "%s-%d" % (self.stack_name, i) self._add_instance(template, server_name, networks, scheduler_hints=scheduler_hints)
[docs]def update_scheduler_hints(scheduler_hints, added_servers, placement_group): ''' update scheduler hints from server's placement configuration TODO: this code is openstack specific and should move somewhere else ''' if placement_group.policy == "affinity": if "same_host" in scheduler_hints: host_list = scheduler_hints["same_host"] else: host_list = scheduler_hints["same_host"] = [] else: if "different_host" in scheduler_hints: host_list = scheduler_hints["different_host"] else: host_list = scheduler_hints["different_host"] = [] for name in added_servers: if name in placement_group.members: host_list.append({'get_resource': name})