2 Distributed Cloud Emulator (dcemulator)
3 (c) 2015 by Manuel Peuster <manuel.peuster@upb.de>
5 from mininet
.node
import Docker
9 DCDPID_BASE
= 1000 # start of switch dpid's used for data center switches
12 class EmulatorCompute(Docker
):
14 Emulator specific compute node class.
15 Inherits from Dockernet's Docker host class.
16 Represents a single container connected to a (logical)
18 We can add emulator specific helper functions to it.
22 self
, name
, dimage
, **kwargs
):
23 logging
.debug("Create EmulatorCompute instance: %s" % name
)
25 # call original Docker.__init__
26 Docker
.__init
__(self
, name
, dimage
, **kwargs
)
28 def getNetworkStatus(self
):
30 Helper method to receive information about the virtual networks
31 this compute instance is connected to.
33 # format list of tuples (name, Ip, MAC, isUp, status)
34 return [(str(i
), i
.IP(), i
.MAC(), i
.isUp(), i
.status())
35 for i
in self
.intfList()]
39 Helper method to receive information about this compute instance.
42 status
["name"] = self
.name
43 status
["network"] = self
.getNetworkStatus()
44 status
["image"] = self
.dimage
45 status
["cpu_quota"] = self
.cpu_quota
46 status
["cpu_period"] = self
.cpu_period
47 status
["cpu_shares"] = self
.cpu_shares
48 status
["cpuset"] = self
.cpuset
49 status
["mem_limit"] = self
.mem_limit
50 status
["memswap_limit"] = self
.memswap_limit
51 status
["state"] = self
.dcli
.inspect_container(self
.dc
)["State"]
52 status
["id"] = self
.dcli
.inspect_container(self
.dc
)["Id"]
56 class Datacenter(object):
58 Represents a logical data center to which compute resources
59 (Docker containers) can be added at runtime.
61 Will also implement resource bookkeeping in later versions.
64 def __init__(self
, name
):
65 self
.net
= None # DCNetwork to which we belong
67 self
.switch
= None # first prototype assumes one "bigswitch" per DC
68 self
.containers
= {} # keep track of running containers
70 def _get_next_dc_dpid(self
):
77 Each data center is represented by a single switch to which
78 compute resources can be connected at run time.
80 TODO: This will be changed in the future to support multiple networks
83 self
.switch
= self
.net
.mnet
.addSwitch(
84 "%s.s1" % self
.name
, dpid
=hex(self
._get
_next
_dc
_dpid
())[2:])
85 logging
.debug("created data center switch: %s" % str(self
.switch
))
90 def startCompute(self
, name
, image
=None, network
=None):
92 Create a new container as compute resource and connect it to this
95 TODO: This interface will change to support multiple networks to which
96 a single container can be connected.
98 assert name
is not None
99 # set default parameter
103 network
= {} # {"ip": "10.0.0.254/8"}
104 # create the container and connect it to the given network
105 d
= self
.net
.addDocker("%s" % (name
), dimage
=image
)
106 self
.net
.addLink(d
, self
.switch
, params1
=network
)
107 self
.containers
[name
] = d
108 return name
# we might use UUIDs for naming later on
110 def stopCompute(self
, name
):
112 Stop and remove a container from this data center.
114 assert name
in self
.containers
116 link
=None, node1
=self
.containers
[name
], node2
=self
.switch
)
117 self
.net
.removeDocker("%s" % (name
))
118 del self
.containers
[name
]
121 def listCompute(self
):
123 Return a list of all running containers assigned to this
126 return self
.containers
.itervalues()