blob: 6adf57c0d3b4de3f167682a5045778c7c27fe625 [file] [log] [blame]
"""
Distributed Cloud Emulator (dcemulator)
(c) 2015 by Manuel Peuster <manuel.peuster@upb.de>
"""
import logging
DCDPID_BASE = 1000 # start of switch dpid's used for data center switches
class Datacenter(object):
"""
Represents a logical data center to which compute resources
(Docker containers) can be added at runtime.
Will also implement resource bookkeeping in later versions.
"""
def __init__(self, name):
self.net = None # DCNetwork to which we belong
self.name = name
self.switch = None # first prototype assumes one "bigswitch" per DC
self.containers = {} # keep track of running containers
def _get_next_dc_dpid(self):
global DCDPID_BASE
DCDPID_BASE += 1
return DCDPID_BASE
def create(self):
"""
Each data center is represented by a single switch to which
compute resources can be connected at run time.
TODO: This will be changed in the future to support multiple networks
per data center
"""
self.switch = self.net.mnet.addSwitch(
"%s.s1" % self.name, dpid=hex(self._get_next_dc_dpid())[2:])
logging.debug("created data center switch: %s" % str(self.switch))
def start(self):
pass
def addCompute(self, name):
"""
Create a new container as compute resource and connect it to this
data center.
"""
# TODO ip management
d = self.net.addDocker("%s.%s" % (self.name, name), dimage="ubuntu")
self.net.addLink(d, self.switch, params1={"ip": "10.0.0.254/8"})
self.containers[name] = d
def removeCompute(self, name):
"""
Stop and remove a container from this data center.
"""
assert name in self.containers
self.net.removeLink(
link=None, node1=self.containers[name], node2=self.switch)
self.net.removeDocker("%s.%s" % (self.name, name))
del self.containers[name]