"""
from mininet.node import Docker
from mininet.link import Link
+from emuvim.dcemulator.resourcemodel import NotEnoughResourcesAvailable
import logging
+import time
+import json
+
+LOG = logging.getLogger("dcemulator")
+LOG.setLevel(logging.DEBUG)
DCDPID_BASE = 1000 # start of switch dpid's used for data center switches
class EmulatorCompute(Docker):
"""
Emulator specific compute node class.
- Inherits from Dockernet's Docker host class.
+ Inherits from Containernet's Docker host class.
Represents a single container connected to a (logical)
data center.
We can add emulator specific helper functions to it.
def __init__(
self, name, dimage, **kwargs):
- logging.debug("Create EmulatorCompute instance: %s" % name)
- self.datacenter = None # pointer to current DC
-
+ self.datacenter = kwargs.get("datacenter") # pointer to current DC
+ self.flavor_name = kwargs.get("flavor_name")
+ LOG.debug("Starting compute instance %r in data center %r" % (name, str(self.datacenter)))
# call original Docker.__init__
Docker.__init__(self, name, dimage, **kwargs)
this compute instance is connected to.
"""
# format list of tuples (name, Ip, MAC, isUp, status)
- return [(str(i), i.IP(), i.MAC(), i.isUp(), i.status())
+ return [{'intf_name':str(i), 'ip':i.IP(), 'mac':i.MAC(), 'up':i.isUp(), 'status':i.status()}
for i in self.intfList()]
def getStatus(self):
status = {}
status["name"] = self.name
status["network"] = self.getNetworkStatus()
+ status["docker_network"] = self.dcinfo['NetworkSettings']['IPAddress']
status["image"] = self.dimage
+ status["flavor_name"] = self.flavor_name
status["cpu_quota"] = self.cpu_quota
status["cpu_period"] = self.cpu_period
status["cpu_shares"] = self.cpu_shares
DC_COUNTER = 1
- def __init__(self, label, metadata={}):
+ def __init__(self, label, metadata={}, resource_log_path=None):
self.net = None # DCNetwork to which we belong
# each node (DC) has a short internal name used by Mininet
# this is caused by Mininets naming limitations for swtiches etc.
self.label = label
# dict to store arbitrary metadata (e.g. latitude and longitude)
self.metadata = metadata
- self.switch = None # first prototype assumes one "bigswitch" per DC
- self.containers = {} # keep track of running containers
+ # path to which resource information should be logged (e.g. for experiments). None = no logging
+ self.resource_log_path = resource_log_path
+ # first prototype assumes one "bigswitch" per DC
+ self.switch = None
+ # keep track of running containers
+ self.containers = {}
+ # pointer to assigned resource model
+ self._resource_model = None
+
+ def __repr__(self):
+ return self.label
def _get_next_dc_dpid(self):
global DCDPID_BASE
"""
self.switch = self.net.addSwitch(
"%s.s1" % self.name, dpid=hex(self._get_next_dc_dpid())[2:])
- logging.debug("created data center switch: %s" % str(self.switch))
+ LOG.debug("created data center switch: %s" % str(self.switch))
def start(self):
pass
- def startCompute(self, name, image=None, command=None, network=None):
+ def startCompute(self, name, image=None, command=None, network=None, flavor_name="tiny"):
"""
Create a new container as compute resource and connect it to this
data center.
:param image: image name (string)
:param command: command (string)
:param network: networks list({"ip": "10.0.0.254/8"}, {"ip": "11.0.0.254/24"})
+ :param flavor_name: name of the flavor for this compute container
:return:
"""
assert name is not None
raise Exception("Container with name %s already exists." % name)
# set default parameter
if image is None:
- image = "ubuntu"
+ image = "ubuntu:trusty"
if network is None:
network = {} # {"ip": "10.0.0.254/8"}
if isinstance(network, dict):
network.append({})
# create the container
- d = self.net.addDocker("%s" % (name), dimage=image, dcmd=command)
+ d = self.net.addDocker(
+ "%s" % (name),
+ dimage=image,
+ dcmd=command,
+ datacenter=self,
+ flavor_name=flavor_name
+ )
+
+ # apply resource limits to container if a resource model is defined
+ if self._resource_model is not None:
+ try:
+ self._resource_model.allocate(d)
+ self._resource_model.write_allocation_log(d, self.resource_log_path)
+ except NotEnoughResourcesAvailable as ex:
+ LOG.warning("Allocation of container %r was blocked by resource model." % name)
+ LOG.info(ex.message)
+ # ensure that we remove the container
+ self.net.removeDocker(name)
+ return None
+
# connect all given networks
+ # if no --net option is given, network = [{}], so 1 empty dict in the list
+ # this results in 1 default interface with a default ip address
for nw in network:
- # TODO we cannot use TCLink here (see: https://github.com/mpeuster/dockernet/issues/3)
- self.net.addLink(d, self.switch, params1=nw, cls=Link)
+ # TODO we cannot use TCLink here (see: https://github.com/mpeuster/containernet/issues/3)
+ self.net.addLink(d, self.switch, params1=nw, cls=Link, intfName1=nw.get('id'))
# do bookkeeping
self.containers[name] = d
- d.datacenter = self
return d # we might use UUIDs for naming later on
def stopCompute(self, name):
assert name is not None
if name not in self.containers:
raise Exception("Container with name %s not found." % name)
+ LOG.debug("Stopping compute instance %r in data center %r" % (name, str(self)))
+
+ # stop the monitored metrics
+ if self.net.monitor_agent is not None:
+ self.net.monitor_agent.stop_metric(name)
+
+ # call resource model and free resources
+ if self._resource_model is not None:
+ self._resource_model.free(self.containers[name])
+ self._resource_model.write_free_log(self.containers[name], self.resource_log_path)
+
+ # remove links
self.net.removeLink(
link=None, node1=self.containers[name], node2=self.switch)
+
+ # remove container
self.net.removeDocker("%s" % (name))
del self.containers[name]
+
return True
def listCompute(self):
"n_running_containers": len(self.containers),
"metadata": self.metadata
}
+
+ def assignResourceModel(self, rm):
+ """
+ Assign a resource model to this DC.
+ :param rm: a BaseResourceModel object
+ :return:
+ """
+ if self._resource_model is not None:
+ raise Exception("There is already an resource model assigned to this DC.")
+ self._resource_model = rm
+ self.net.rm_registrar.register(self, rm)
+ LOG.info("Assigned RM: %r to DC: %r" % (rm, self))
+
projects / osm / vim-emu.git / blobdiff