+++ /dev/null
-"""
-This is an example topology for the distributed cloud emulator (dcemulator).
-(c) 2015 by Manuel Peuster <manuel.peuster@upb.de>
-
-
-This is an example that shows how a user of the emulation tool can
-define network topologies with multiple emulated cloud data centers.
-
-The definition is done with a Python API which looks very similar to the
-Mininet API (in fact it is a wrapper for it).
-
-We only specify the topology *between* data centers not within a single
-data center (data center internal setups or placements are not of interest,
-we want to experiment with VNF chains deployed across multiple PoPs).
-
-The original Mininet API has to be completely hidden and not be used by this
-script.
-"""
-import logging
-from mininet.log import setLogLevel
-from dcemulator.net import DCNetwork
-from api.zerorpcapi import ZeroRpcApiEndpoint
-from api.zerorpcapi_DCNetwork import ZeroRpcApiEndpointDCNetwork
-
-logging.basicConfig(level=logging.INFO)
-
-
-def create_topology1():
- """
- 1. Create a data center network object (DCNetwork)
- """
- net = DCNetwork()
-
- """
- 1b. add a monitoring agent to the DCNetwork
- """
- mon_api = ZeroRpcApiEndpointDCNetwork("0.0.0.0", 5151)
- mon_api.connectDCNetwork(net)
- mon_api.start()
- """
- 2. Add (logical) data centers to the topology
- (each data center is one "bigswitch" in our simplified
- first prototype)
- """
- dc1 = net.addDatacenter("datacenter1")
- dc2 = net.addDatacenter("datacenter2")
- dc3 = net.addDatacenter("long_data_center_name3")
- dc4 = net.addDatacenter(
- "datacenter4",
- metadata={"mydata": "we can also add arbitrary metadata to each DC"})
-
- """
- 3. You can add additional SDN switches for data center
- interconnections to the network.
- """
- s1 = net.addSwitch("s1")
-
- """
- 4. Add links between your data centers and additional switches
- to define you topology.
- These links can use Mininet's features to limit bw, add delay or jitter.
- """
- net.addLink(dc1, dc2)
- net.addLink("datacenter1", s1)
- net.addLink(s1, dc3)
- net.addLink(s1, "datacenter4")
-
- """
- 5. We want to access and control our data centers from the outside,
- e.g., we want to connect an orchestrator to start/stop compute
- resources aka. VNFs (represented by Docker containers in the emulated)
-
- So we need to instantiate API endpoints (e.g. a zerorpc or REST
- interface). Depending on the endpoint implementations, we can connect
- one or more data centers to it, which can then be controlled through
- this API, e.g., start/stop/list compute instances.
- """
- # create a new instance of a endpoint implementation
- zapi1 = ZeroRpcApiEndpoint("0.0.0.0", 4242)
- # connect data centers to this endpoint
- zapi1.connectDatacenter(dc1)
- zapi1.connectDatacenter(dc2)
- zapi1.connectDatacenter(dc3)
- zapi1.connectDatacenter(dc4)
- # run API endpoint server (in another thread, don't block)
- zapi1.start()
-
- """
- 5.1. For our example, we create a second endpoint to illustrate that
- this is supported by our design. This feature allows us to have
- one API endpoint for each data center. This makes the emulation
- environment more realistic because you can easily create one
- OpenStack-like REST API endpoint for *each* data center.
- This will look like a real-world multi PoP/data center deployment
- from the perspective of an orchestrator.
- """
- zapi2 = ZeroRpcApiEndpoint("0.0.0.0", 4343)
- zapi2.connectDatacenter(dc3)
- zapi2.connectDatacenter(dc4)
- zapi2.start()
-
- """
- 6. Finally we are done and can start our network (the emulator).
- We can also enter the Mininet CLI to interactively interact
- with our compute resources (just like in default Mininet).
- But we can also implement fully automated experiments that
- can be executed again and again.
- """
- net.start()
- net.CLI()
- # when the user types exit in the CLI, we stop the emulator
- net.stop()
-
-
-def main():
- setLogLevel('info') # set Mininet loglevel
- create_topology1()
-
-
-if __name__ == '__main__':
- main()
projects / osm / vim-emu.git / blobdiff