--- /dev/null
+##############################################################################
+# 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
+##############################################################################
+
+""" Logical model
+
+"""
+
+import sys
+import os
+
+from yardstick.orchestrator.heat import HeatTemplate
+
+
+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
+
+
+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
+
+ def add_member(self, name):
+ self.members.add(name)
+
+ @staticmethod
+ def get(name):
+ if name in PlacementGroup.map:
+ return PlacementGroup.map[name]
+ else:
+ return None
+
+
+class Router(Object):
+ '''Class that represents a router in the logical model'''
+ def __init__(self, name, network_name, context, external_gateway_info):
+ super(Router, 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
+
+
+class Network(Object):
+ '''Class that represents a network in the logical model'''
+ list = []
+
+ def __init__(self, name, context, attrs):
+ super(Network, self).__init__(name, context)
+ self.stack_name = context.name + "-" + self.name
+ self.subnet_stack_name = self.stack_name + "-subnet"
+ self.subnet_cidr = attrs["cidr"]
+ self.router = None
+
+ if "external_network" in attrs:
+ self.router = Router("router", self.name,
+ context, attrs["external_network"])
+
+ Network.list.append(self)
+
+ 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
+ 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
+ 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
+
+
+class Server(Object):
+ '''Class that represents a server in the logical model'''
+ list = []
+
+ def __init__(self, name, context, attrs):
+ super(Server, self).__init__(name, context)
+ self.stack_name = context.name + "-" + self.name
+ self.keypair_name = context.keypair_name
+ self.secgroup_name = context.secgroup_name
+
+ 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
+ if "floating_ip" in attrs:
+ self.floating_ip = {}
+
+ 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)
+
+ template.add_server(server_name, self.image, self.flavor,
+ ports=port_name_list,
+ key_name=self.keypair_name,
+ scheduler_hints=scheduler_hints)
+
+ 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 = "%s-%s" % (template.name, self.name)
+ self._add_instance(template, server_name, networks,
+ scheduler_hints=scheduler_hints)
+ else:
+ for i in range(self.instances):
+ server_name = "%s-%s-%d" % (template.name, self.name, i)
+ self._add_instance(template, server_name, networks,
+ scheduler_hints=scheduler_hints)
+
+
+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})
+
+
+class Context(object):
+ '''Class that represents a context in the logical model'''
+ list = []
+
+ def __init__(self):
+ self.name = None
+ self.stack = None
+ self.networks = []
+ self.servers = []
+ self.placement_groups = []
+ self.keypair_name = None
+ self.secgroup_name = None
+ self._server_map = {}
+ self._image = None
+ self._flavor = None
+ self._user = None
+ Context.list.append(self)
+
+ def init(self, attrs):
+ '''initializes itself from the supplied arguments'''
+ self.name = attrs["name"]
+ self.keypair_name = self.name + "-key"
+ self.secgroup_name = self.name + "-secgroup"
+
+ if "image" in attrs:
+ self._image = attrs["image"]
+
+ if "flavor" in attrs:
+ self._flavor = attrs["flavor"]
+
+ if "user" in attrs:
+ self._user = attrs["user"]
+
+ if "placement_groups" in attrs:
+ for name, pgattrs in attrs["placement_groups"].items():
+ pg = PlacementGroup(name, self, pgattrs["policy"])
+ self.placement_groups.append(pg)
+
+ for name, netattrs in attrs["networks"].items():
+ network = Network(name, self, netattrs)
+ self.networks.append(network)
+
+ for name, serverattrs in attrs["servers"].items():
+ server = Server(name, self, serverattrs)
+ self.servers.append(server)
+ self._server_map[server.dn] = server
+
+ @property
+ def image(self):
+ '''returns application's default image name'''
+ return self._image
+
+ @property
+ def flavor(self):
+ '''returns application's default flavor name'''
+ return self._flavor
+
+ @property
+ def user(self):
+ '''return login user name corresponding to image'''
+ return self._user
+
+ def _add_resources_to_template(self, template):
+ '''add to the template the resources represented by this context'''
+ template.add_keypair(self.keypair_name)
+ template.add_security_group(self.secgroup_name)
+
+ for network in self.networks:
+ template.add_network(network.stack_name)
+ template.add_subnet(network.subnet_stack_name, network.stack_name,
+ network.subnet_cidr)
+
+ if network.router:
+ template.add_router(network.router.stack_name,
+ network.router.external_gateway_info,
+ network.subnet_stack_name)
+ template.add_router_interface(network.router.stack_if_name,
+ network.router.stack_name,
+ network.subnet_stack_name)
+
+ # create a list of servers sorted by increasing no of placement groups
+ list_of_servers = sorted(self.servers,
+ key=lambda s: len(s.placement_groups))
+
+ availability_servers = []
+ for server in list_of_servers:
+ for pg in server.placement_groups:
+ if pg.policy == "availability":
+ availability_servers.append(server)
+ break
+
+ # add servers with scheduler hints derived from placement groups
+ added_servers = []
+ for server in availability_servers:
+ scheduler_hints = {}
+ for pg in server.placement_groups:
+ update_scheduler_hints(scheduler_hints, added_servers, pg)
+ server.add_to_template(template, self.networks, scheduler_hints)
+ added_servers.append(server.stack_name)
+
+ affinity_servers = []
+ for server in list_of_servers:
+ for pg in server.placement_groups:
+ if pg.policy == "affinity":
+ affinity_servers.append(server)
+ break
+
+ for server in affinity_servers:
+ if server.stack_name in added_servers:
+ continue
+ scheduler_hints = {}
+ for pg in server.placement_groups:
+ update_scheduler_hints(scheduler_hints, added_servers, pg)
+ server.add_to_template(template, self.networks, scheduler_hints)
+ added_servers.append(server.stack_name)
+
+ def deploy(self):
+ '''deploys template into a stack using cloud'''
+ print "Deploying context as stack '%s' using auth_url %s" % (
+ self.name, os.environ.get('OS_AUTH_URL'))
+
+ template = HeatTemplate(self.name)
+ self._add_resources_to_template(template)
+
+ try:
+ self.stack = template.create()
+ except KeyboardInterrupt:
+ sys.exit("\nStack create interrupted")
+ except RuntimeError as err:
+ sys.exit("error: failed to deploy stack: '%s'" % err.args)
+ except Exception as err:
+ sys.exit("error: failed to deploy stack: '%s'" % err)
+
+ # copy some vital stack output into context
+ for server in Server.list:
+ for port in server.ports.itervalues():
+ port["ipaddr"] = self.stack.outputs[port["stack_name"]]
+
+ if server.floating_ip:
+ server.floating_ip["ipaddr"] = \
+ self.stack.outputs[server.floating_ip["stack_name"]]
+
+ print "Context deployed"
+
+ def undeploy(self):
+ '''undeploys stack from cloud'''
+ if self.stack:
+ print "Undeploying context (stack) '%s'" % self.name
+ self.stack.delete()
+ self.stack = None
+ print "Context undeployed"
+
+ def get_server(self, name):
+ '''lookup server object by name from context'''
+ return self._server_map[name]
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