src/emuvim/examples/simple_topology_restapi.py

   1 """
   2 Copyright (c) 2015 SONATA-NFV
   3 ALL RIGHTS RESERVED.
   4
   5 Licensed under the Apache License, Version 2.0 (the "License");
   6 you may not use this file except in compliance with the License.
   7 You may obtain a copy of the License at
   8
   9     http://www.apache.org/licenses/LICENSE-2.0
  10
  11 Unless required by applicable law or agreed to in writing, software
  12 distributed under the License is distributed on an "AS IS" BASIS,
  13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 See the License for the specific language governing permissions and
  15 limitations under the License.
  16
  17 Neither the name of the SONATA-NFV [, ANY ADDITIONAL AFFILIATION]
  18 nor the names of its contributors may be used to endorse or promote
  19 products derived from this software without specific prior written
  20 permission.
  21
  22 This work has been performed in the framework of the SONATA project,
  23 funded by the European Commission under Grant number 671517 through
  24 the Horizon 2020 and 5G-PPP programmes. The authors would like to
  25 acknowledge the contributions of their colleagues of the SONATA
  26 partner consortium (www.sonata-nfv.eu).
  27 """
  28 import logging
  29 from mininet.log import setLogLevel
  30 from emuvim.dcemulator.net import DCNetwork
  31 from emuvim.api.rest.rest_api_endpoint import RestApiEndpoint
  32
  33 from emuvim.api.zerorpc.compute import ZeroRpcApiEndpoint
  34 from emuvim.api.zerorpc.network import ZeroRpcApiEndpointDCNetwork
  35
  36 logging.basicConfig(level=logging.INFO)
  37
  38
  39 def create_topology1():
  40     """
  41     1. Create a data center network object (DCNetwork)
  42     """
  43     net = DCNetwork(monitor=True, enable_learning=True)
  44
  45     """
  46     1b. add a monitoring agent to the DCNetwork
  47     """
  48     #keep old zeroRPC interface to test the prometheus metric query
  49     mon_api = ZeroRpcApiEndpointDCNetwork("0.0.0.0", 5151)
  50     mon_api.connectDCNetwork(net)
  51     mon_api.start()
  52     """
  53     2. Add (logical) data centers to the topology
  54        (each data center is one "bigswitch" in our simplified
  55         first prototype)
  56     """
  57     dc1 = net.addDatacenter("datacenter1")
  58     dc2 = net.addDatacenter("datacenter2")
  59     dc3 = net.addDatacenter("long_data_center_name3")
  60     dc4 = net.addDatacenter(
  61         "datacenter4",
  62         metadata={"mydata": "we can also add arbitrary metadata to each DC"})
  63
  64     """
  65     3. You can add additional SDN switches for data center
  66        interconnections to the network.
  67     """
  68     s1 = net.addSwitch("s1")
  69
  70     """
  71     4. Add links between your data centers and additional switches
  72        to define you topology.
  73        These links can use Mininet's features to limit bw, add delay or jitter.
  74     """
  75     net.addLink(dc1, dc2)
  76     net.addLink("datacenter1", s1)
  77     net.addLink(s1, dc3)
  78     net.addLink(s1, "datacenter4")
  79
  80     """
  81     5. We want to access and control our data centers from the outside,
  82        e.g., we want to connect an orchestrator to start/stop compute
  83        resources aka. VNFs (represented by Docker containers in the emulated)
  84
  85        So we need to instantiate API endpoints (e.g. a zerorpc or REST
  86        interface). Depending on the endpoint implementations, we can connect
  87        one or more data centers to it, which can then be controlled through
  88        this API, e.g., start/stop/list compute instances.
  89     """
  90     # keep the old zeroRPC interface for the prometheus metric query test
  91     zapi1 = ZeroRpcApiEndpoint("0.0.0.0", 4242)
  92     # connect data centers to this endpoint
  93     zapi1.connectDatacenter(dc1)
  94     zapi1.connectDatacenter(dc2)
  95     # run API endpoint server (in another thread, don't block)
  96     zapi1.start()
  97
  98     # create a new instance of a endpoint implementation
  99     api1 = RestApiEndpoint("127.0.0.1", 5001)
 100     # connect data centers to this endpoint
 101     api1.connectDatacenter(dc1)
 102     api1.connectDatacenter(dc2)
 103     api1.connectDatacenter(dc3)
 104     api1.connectDatacenter(dc4)
 105     # connect total network also, needed to do the chaining and monitoring
 106     api1.connectDCNetwork(net)
 107     # run API endpoint server (in another thread, don't block)
 108     api1.start()
 109
 110     """
 111     6. Finally we are done and can start our network (the emulator).
 112        We can also enter the Mininet CLI to interactively interact
 113        with our compute resources (just like in default Mininet).
 114        But we can also implement fully automated experiments that
 115        can be executed again and again.
 116     """
 117     net.start()
 118     net.CLI()
 119     # when the user types exit in the CLI, we stop the emulator
 120     net.stop()
 121
 122
 123 def main():
 124     setLogLevel('info')  # set Mininet loglevel
 125     create_topology1()
 126
 127
 128 if __name__ == '__main__':
 129     main()