from mininet.node import Docker
from mininet.link import Link
import logging
+import time
+import json
LOG = logging.getLogger("dcemulator")
LOG.setLevel(logging.DEBUG)
status["name"] = self.name
status["network"] = self.getNetworkStatus()
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
+ # 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
if len(network) < 1:
network.append({})
- # allocate in resource resource model and compute resource limits for new container
- if self._resource_model is not None:
- # TODO pass resource limits to new container (cf. Dockernet API) Issue #47
- (cpu_limit, mem_limit, disk_limit) = alloc = self._resource_model.allocate(name, flavor_name)
- LOG.debug("Allocation result: %r" % str(alloc))
# create the container
d = self.net.addDocker(
"%s" % (name),
dimage=image,
dcmd=command,
datacenter=self,
- flavor_name=flavor_name)
+ flavor_name=flavor_name
+ )
+
+ # apply resource limits to container if a resource model is defined
+ if self._resource_model is not None:
+ self._resource_model.allocate(d)
+ self._resource_model.write_allocation_log(d, self.resource_log_path)
+
# 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)
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)))
+
+ # 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]
- # call resource model and free resources
- if self._resource_model is not None:
- self._resource_model.free(name)
+
return True
def listCompute(self):
}
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