Exemplo n.º 1
0
        "python /home/server.py h3 --get_state",
    )
    info("*** Send SEGTERM signal to the service running on the h2.\n"
         "Let it transfer its state through the internal network.\n")
    pid_old_service = (check_output(
        shlex.split("pgrep -f '^python /home/server.py h2$'")).decode(
            "utf-8").strip())
    for _ in range(3):
        check_output(shlex.split("kill {}".format(pid_old_service)))
        # Wait a little bit to let the signal work.
        time.sleep(1)

    service_log = counter_server_h3.getLogs()
    print("\n*** Current log of the service on h3: \n{}".format(service_log))

    mgr.removeContainer("counter_server_h2")

    info(
        "*** Mod the added flow to forward traffic from h1 to h3 to switch s1.\n"
    )
    check_output(
        shlex.split(
            'ovs-ofctl mod-flows s1 "in_port={}, actions=output:{}"'.format(
                s1_h1_port_num, s1_h3_port_num)))

    time.sleep(10)
    client_log = client_app.getLogs()
    print("\n*** Setup2: Current log of the client: \n{}".format(client_log))

    info("*** Migrate (Re-deploy) the couter service back to h2.\n")
    counter_server_h2 = mgr.addContainer(
Exemplo n.º 2
0
    net.addLink(switch1, switch2, bw=10, delay="10ms")
    net.addLink(switch2, h2, bw=10, delay="10ms")

    info("\n*** Starting network\n")
    net.start()

    info("*** Run ping and UDP latency measurement with single flow.\n")
    srv1_1 = mgr.addContainer(
        "srv1_1", "h1", "network_measurement", "sockperf server", docker_args={}
    )
    ret = h2.cmd("ping -c 10 -i 0.01 10.0.0.1")
    print(f"- Result of ping: \n{ret}")

    ret = h2.cmd("sockperf under-load -i 10.0.0.1 -t 3 --reply-every 1")
    print(f"- Result of Sockperf: \n{ret}")
    mgr.removeContainer("srv1_1")

    # Run netserver not in daemon mode, avoid container termination.
    srv1_1 = mgr.addContainer(
        "srv1_1", "h1", "network_measurement", "netserver -D", docker_args={}
    )
    # Wait netserver to start.
    time.sleep(1)

    print("** Run flent RRUL and ping tests (each 15 seconds.)")
    h2.cmd("flent rrul -p all_scaled -l 15 -H 10.0.0.1 -o /flent_data/rrul.png")
    h2.cmd("flent rrul -p ping_cdf -l 15 -H 10.0.0.1 -o /flent_data/ping.png")
    print("Generated plot and data are located in ./examples/.")

    if not AUTOTEST_MODE:
        CLI(net)
Exemplo n.º 3
0
def start() -> None:
    net = Containernet(build=False, link=TCLink, xterms=False)
    mgr = VNFManager(net)

    rx_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    rx_socket.bind(("127.0.0.1", 8016))
    cnt: int = 0
    active_container: bool = False
    full_tree: bool = False

    info("\n*** Adding Controller\n")
    controller1: RemoteController = net.addController(
        "controller1", controller=RemoteController, ip="127.0.0.1", port=6633)
    controller1.start()

    info("\n*** Adding Hosts\n")
    client1: DockerHost = net.addDockerHost(
        "client1",
        dimage="mec_test",
        ip="10.0.0.10",
        mac="00:00:00:00:00:01",
        docker_args={"volumes": {
            "/tmp": {
                "bind": "/tmp",
                "mode": "rw"
            }
        }},
    )
    probe1: DockerHost = net.addDockerHost(
        "probe1",
        dimage="mec_test",
        docker_args={},
        ip="10.0.0.40",
        mac="00:00:00:00:01:ff",
    )
    server1: DockerHost = net.addDockerHost(
        "server1",
        dimage="mec_test",
        ip="10.0.0.21",
        mac="00:00:00:00:01:01",
        docker_args={
            "cpuset_cpus": "0",
            "cpu_quota": 25000
        },
    )
    server2: DockerHost = net.addDockerHost(
        "server2",
        dimage="mec_test",
        ip="10.0.0.22",
        mac="00:00:00:00:01:02",
        docker_args={
            "cpuset_cpus": "0",
            "cpu_quota": 25000
        },
    )
    server3: DockerHost = net.addDockerHost(
        "server3",
        dimage="mec_test",
        ip="10.0.0.23",
        mac="00:00:00:00:01:03",
        docker_args={
            "cpuset_cpus": "0",
            "cpu_quota": 25000
        },
    )
    server4: DockerHost = net.addDockerHost(
        "server4",
        dimage="mec_test",
        ip="10.0.0.24",
        mac="00:00:00:00:01:04",
        docker_args={
            "cpuset_cpus": "0",
            "cpu_quota": 25000
        },
    )
    if full_tree:
        server5: DockerHost = net.addDockerHost(
            "server5",
            dimage="mec_test",
            ip="10.0.0.25",
            mac="00:00:00:00:01:05",
            docker_args={
                "cpuset_cpus": "0",
                "cpu_quota": 25000
            },
        )
        server6: DockerHost = net.addDockerHost(
            "server6",
            dimage="mec_test",
            ip="10.0.0.26",
            mac="00:00:00:00:01:06",
            docker_args={
                "cpuset_cpus": "0",
                "cpu_quota": 25000
            },
        )
        server7: DockerHost = net.addDockerHost(
            "server7",
            dimage="mec_test",
            ip="10.0.0.27",
            mac="00:00:00:00:01:07",
            docker_args={
                "cpuset_cpus": "0",
                "cpu_quota": 25000
            },
        )
        server8: DockerHost = net.addDockerHost(
            "server8",
            dimage="mec_test",
            ip="10.0.0.28",
            mac="00:00:00:00:01:08",
            docker_args={
                "cpuset_cpus": "0",
                "cpu_quota": 25000
            },
        )

    info("\n*** Adding Switches\n")
    switch1: OVSSwitch = net.addSwitch("switch1")

    switch11: OVSSwitch = net.addSwitch("switch11")
    switch12: OVSSwitch = net.addSwitch("switch12")

    switch111: OVSSwitch = net.addSwitch("switch111")
    switch112: OVSSwitch = net.addSwitch("switch112")
    switch121: OVSSwitch = net.addSwitch("switch121")
    switch122: OVSSwitch = net.addSwitch("switch122")

    switch1.start([controller1])
    switch1.cmdPrint("ovs-vsctl show")

    switch11.start([controller1])
    switch11.cmdPrint("ovs-vsctl show")
    switch12.start([controller1])
    switch12.cmdPrint("ovs-vsctl show")

    switch111.start([controller1])
    switch111.cmdPrint("ovs-vsctl show")
    switch112.start([controller1])
    switch112.cmdPrint("ovs-vsctl show")
    switch121.start([controller1])
    switch121.cmdPrint("ovs-vsctl show")
    switch122.start([controller1])
    switch122.cmdPrint("ovs-vsctl show")

    info("\n*** Adding Links\n")
    net.addLink(node1=switch1, node2=client1, delay="200ms", use_htb=True)
    net.addLink(node1=switch1, node2=probe1, delay="50ms", use_htb=True)

    net.addLink(node1=switch1, node2=switch11, delay="10ms", use_htb=True)
    if full_tree:
        net.addLink(node1=switch1, node2=switch12, delay="10ms", use_htb=True)

    net.addLink(node1=switch11, node2=switch111, delay="10ms", use_htb=True)
    net.addLink(node1=switch11, node2=switch112, delay="10ms", use_htb=True)
    if full_tree:
        net.addLink(node1=switch12,
                    node2=switch121,
                    delay="10ms",
                    use_htb=True)
        net.addLink(node1=switch12,
                    node2=switch122,
                    delay="10ms",
                    use_htb=True)

    net.addLink(node1=switch111, node2=server1, delay="100ms", use_htb=True)
    net.addLink(node1=switch111, node2=server2, delay="150ms", use_htb=True)
    net.addLink(node1=switch112, node2=server3, delay="200ms", use_htb=True)
    net.addLink(node1=switch112, node2=server4, delay="250ms", use_htb=True)
    if full_tree:
        net.addLink(node1=switch121,
                    node2=server5,
                    delay="300ms",
                    use_htb=True)
        net.addLink(node1=switch121,
                    node2=server6,
                    delay="350ms",
                    use_htb=True)
        net.addLink(node1=switch122,
                    node2=server7,
                    delay="400ms",
                    use_htb=True)
        net.addLink(node1=switch122,
                    node2=server8,
                    delay="450ms",
                    use_htb=True)

    info("\n*** Starting Network\n")
    net.build()
    net.start()
    net.pingAll()  # optional

    info("\n*** Adding Docker Containers\n")
    client1_container: APPContainer = mgr.addContainer(
        name="client1_container",
        dhost="client1",
        dimage="mec_test",
        docker_args={},
        dcmd="python3.6 /tmp/client.py",
    )
    probe1_container: APPContainer = mgr.addContainer(
        name="probe1_container",
        dhost="probe1",
        dimage="mec_test",
        docker_args={},
        dcmd="python3.6 /tmp/probe_agent.py",
    )

    probing_server1_container: APPContainer = mgr.addContainer(
        name="probing_server1_container",
        dhost="server1",
        dimage="mec_test",
        docker_args={},
        dcmd="python3.6 /tmp/probe_server.py",
    )
    probing_server2_container: APPContainer = mgr.addContainer(
        name="probing_server2_container",
        dhost="server2",
        dimage="mec_test",
        docker_args={},
        dcmd="python3.6 /tmp/probe_server.py",
    )
    probing_server3_container: APPContainer = mgr.addContainer(
        name="probing_server3_container",
        dhost="server3",
        dimage="mec_test",
        docker_args={},
        dcmd="python3.6 /tmp/probe_server.py",
    )
    probing_server4_container: APPContainer = mgr.addContainer(
        name="probing_server4_container",
        dhost="server4",
        dimage="mec_test",
        docker_args={},
        dcmd="python3.6 /tmp/probe_server.py",
    )
    if full_tree:
        probing_server5_container: APPContainer = mgr.addContainer(
            name="probing_server5_container",
            dhost="server5",
            dimage="mec_test",
            docker_args={},
            dcmd="python3.6 /tmp/probe_server.py",
        )
        probing_server6_container: APPContainer = mgr.addContainer(
            name="probing_server6_container",
            dhost="server6",
            dimage="mec_test",
            docker_args={},
            dcmd="python3.6 /tmp/probe_server.py",
        )
        probing_server7_container: APPContainer = mgr.addContainer(
            name="probing_server7_container",
            dhost="server7",
            dimage="mec_test",
            docker_args={},
            dcmd="python3.6 /tmp/probe_server.py",
        )
        probing_server8_container: APPContainer = mgr.addContainer(
            name="probing_server8_container",
            dhost="server8",
            dimage="mec_test",
            docker_args={},
            dcmd="python3.6 /tmp/probe_server.py",
        )

    time.sleep(5)

    print(
        f"client 1 : \n{client1_container.dins.logs().decode('utf-8')}\n"
        f"probe 1 : \n{probe1_container.dins.logs().decode('utf-8')}\n"
        f"probing server 1 : \n{probing_server1_container.dins.logs().decode('utf-8')}\n"
        f"probing server 2 : \n{probing_server2_container.dins.logs().decode('utf-8')}\n"
        f"probing server 3 : \n{probing_server3_container.dins.logs().decode('utf-8')}\n"
        f"probing server 4 : \n{probing_server4_container.dins.logs().decode('utf-8')}\n"
    )
    if full_tree:
        print(
            f"probing server 5 : \n{probing_server5_container.dins.logs().decode('utf-8')}\n"
            f"probing server 6 : \n{probing_server6_container.dins.logs().decode('utf-8')}\n"
            f"probing server 7 : \n{probing_server7_container.dins.logs().decode('utf-8')}\n"
            f"probing server 8 : \n{probing_server8_container.dins.logs().decode('utf-8')}\n"
        )

    # time.sleep(2)
    # CLI(net)
    time.sleep(30)

    server_container: APPContainer = None

    info("\n*** Await REST instruction from Controller\n"
         )  # REST -> REpresentational State Transfer
    while True:
        data, addr = rx_socket.recvfrom(1024)
        _: str = data.decode()
        print(f"{_} {_[_.__len__()-1]}")
        if active_container:  # if container set, remove it
            mgr.removeContainer(server_container.name)
            time.sleep(2)  # prevent hang on waitContainerStart()
            print("removing container")
        server_container: APPContainer = mgr.addContainer(
            name="server_container",
            # update dhost appropriate to target host
            dhost=f"server{_[_.__len__()-1]}",
            dimage="mec_test",
            docker_args={},
            dcmd="python3.6 /tmp/server.py",
        )
        print(
            f"New container : \n{server_container.dins.logs().decode('utf-8')} on server{_[_.__len__()-1]}"
        )
        cnt += 1
        active_container = True
        time.sleep(10)  # dont allow container change too frequent
        if cnt > 10:
            break

    info("\n*** Removing Docker Containers\n")
    mgr.removeContainer(client1_container.name)
    mgr.removeContainer(probe1_container.name)

    mgr.removeContainer(probing_server1_container.name)
    mgr.removeContainer(probing_server2_container.name)
    mgr.removeContainer(probing_server3_container.name)
    mgr.removeContainer(probing_server4_container.name)
    if full_tree:
        mgr.removeContainer(probing_server5_container.name)
        mgr.removeContainer(probing_server6_container.name)
        mgr.removeContainer(probing_server7_container.name)
        mgr.removeContainer(probing_server8_container.name)

    info("\n*** Stopping Network\n")
    net.stop()
    mgr.stop()
Exemplo n.º 4
0
                            "D6",
                            "drone_mqtt_client",
                            "python3 /home/drone_client_mqtt.py",
                            docker_args={})

    print("*** Adding the MQTT client")
    srv8 = mgr.addContainer("WebServer", "WS", "server", "", docker_args={})

    print("*** Adding the web server")
    srv9 = mgr.addContainer("WebClient",
                            "WC",
                            "client",
                            "bash",
                            docker_args={})

    spawnXtermDocker("WebClient")
    CLI(net)

    mgr.removeContainer("dr1")
    mgr.removeContainer("dr2")
    mgr.removeContainer("dr3")
    mgr.removeContainer("dr4")
    mgr.removeContainer("dr5")
    mgr.removeContainer("dr6")
    mgr.removeContainer("MQTTBroker")
    mgr.removeContainer("WebClient")
    mgr.removeContainer("WebServer")

    net.stop()
    mgr.stop()
Exemplo n.º 5
0
def testDockerInDocker(n):

    net = Containernet(controller=Controller, link=TCLink)
    mgr = VNFManager(net)

    info("*** Adding controller\n")
    net.addController("c0")

    info("*** Adding Docker hosts and switches in a chain topology\n")
    last_sw = None
    hosts = list()
    # Connect hosts
    for i in range(n):
        # Unlimited access to CPU(s) cycles in CPU_SETS
        host = net.addDockerHost(
            "h%s" % (i + 1),
            dimage="dev_test",
            ip="10.0.0.%s" % (i + 1),
            docker_args={"cpuset_cpus": "0"},
        )
        hosts.append(host)
        switch = net.addSwitch("s%s" % (i + 1))
        net.addLink(switch, host, bw=10, delay="10ms")
        if last_sw:
            # Connect switches
            net.addLink(switch, last_sw, bw=10, delay="10ms")
        last_sw = switch

    info("*** Starting network\n")
    net.start()

    info(
        "*** Run a simple ping test between two internal containers deployed on h1 and h%s\n"
        % n)
    head = mgr.addContainer("head",
                            "h1",
                            "dev_test",
                            "/bin/bash",
                            docker_args={})
    tail = mgr.addContainer("tail",
                            "h%s" % n,
                            "dev_test",
                            "ping -c 3 10.0.0.1",
                            docker_args={})

    info("*** Tail start ping head, wait for 5s...")
    time.sleep(5)
    info("\nThe ping result of tail to head: \n")
    print(tail.dins.logs().decode("utf-8"))
    mgr.removeContainer(head.name)
    mgr.removeContainer(tail.name)

    time.sleep(3)

    info("*** Run CPU resource limitation test.")
    info("Update CPU limitation of all Docker hosts (h1-h%s) to %.2f %% \n" %
         (n, 50.0 / n))
    info("Update Memory limitation of all Docker hosts (h1-h%s) to 10MB\n" % n)
    info(
        "Deploy the stress app (100 % CPU and 300M memory) inside all Docker hosts to test the CPU/Memory limitation\n"
    )
    containers = list()
    # Mark: CPU percent = cpu_quota / cpu_period. The default CPU period is
    # 100ms = 100000 us
    for i, h in enumerate(hosts):
        h.dins.update(cpu_quota=int(50000 / n))
        h.dins.update(mem_limit=10 * (1024**2))  # in bytes
        c = mgr.addContainer(
            "stress_app_%s" % (i + 1),
            h.name,
            "dev_test",
            "stress-ng -c 1 -m 1 --vm-bytes 300M",
            docker_args={},
        )
        containers.append(c)

    info("Start monitoring resource usage of internal containers"
         "with default sample count: 3 and sample period: 1 sec\n")
    for c in containers:
        usages = mgr.monResourceStats(c.name)
        if usages:
            print(
                " The average CPU and Memory usage of container:{} is {:.2f}%, {:.2f}MB"
                .format(
                    c.name,
                    (sum(u[0] for u in usages) / len(usages)),
                    (sum(u[1] for u in usages) / len(usages)),
                ))
        else:
            print("[ERROR] Failed to get resource usages from manager")

    for c in containers:
        mgr.removeContainer(c.name)

    info("*** Stopping network\n")
    net.stop()
    mgr.stop()
def myTopology():
    net = Containernet(
        switch=OVSKernelSwitch,
        build=False,
        autoSetMacs=True,
        autoStaticArp=True,
        link=TCLink,
    )

    mgr = VNFManager(net)
    setLogLevel("info")

    info("*** Add Switches\n")
    sconfig1 = {"dpid": "%016x" % 1}
    sconfig2 = {"dpid": "%016x" % 2}
    sconfig3 = {"dpid": "%016x" % 3}
    sconfig4 = {"dpid": "%016x" % 4}
    sconfig5 = {"dpid": "%016x" % 5}
    net.addSwitch("s1", **sconfig1)
    net.addSwitch("s2", **sconfig2)
    net.addSwitch("s3", **sconfig3)
    net.addSwitch("s4", **sconfig4)
    net.addSwitch("s5", **sconfig5)

    info("*** Add Hosts\n")
    host_config = dict(inNamespace=True)
    #net.addHost("h1", **host_config, ip="192.0.0.1")
    h1 = net.addDockerHost(
        "h1",
        dimage="dev_test",
        ip="192.0.0.1",
        docker_args={"hostname": "h1"},
    )
    h2 = net.addDockerHost(
        "h2",
        dimage="dev_test",
        ip="192.0.0.2",
        docker_args={"hostname": "h2"},
    )
    h3 = net.addDockerHost(
        "h3",
        dimage="dev_test",
        ip="192.0.0.3",
        docker_args={"hostname": "h3"},
    )
    h4 = net.addDockerHost(
        "h4",
        dimage="dev_test",
        ip="192.0.0.4",
        docker_args={"hostname": "h4"},
    )
    h5 = net.addDockerHost(
        "h5",
        dimage="dev_test",
        ip="192.0.0.5",
        docker_args={"hostname": "h5"},
    )
    h6 = net.addDockerHost(
        "h6",
        dimage="dev_test",
        ip="192.0.0.6",
        docker_args={"hostname": "h6"},
    )
    h7 = net.addDockerHost(
        "h7",
        dimage="dev_test",
        ip="192.0.0.7",
        docker_args={"hostname": "h7"},
    )
    h8 = net.addDockerHost(
        "h8",
        dimage="dev_test",
        ip="192.0.0.8",
        docker_args={"hostname": "h8"},
    )

    info("*** Add Links\n")
    net.addLink("h1", "s1", bw=B1)
    net.addLink("h2", "s1", bw=B1)
    net.addLink("h3", "s1", bw=B1)
    net.addLink("h4", "s5", bw=B2)
    net.addLink("h5", "s5", bw=B2)
    net.addLink("s1", "s2", bw=B1)
    net.addLink("s2", "s3", bw=B1, delay=DELAY)
    net.addLink("s3", "s4", bw=B1, delay=DELAY)
    net.addLink("s2", "s4", bw=B2)
    net.addLink("s1", "s4", bw=B1)
    net.addLink("s1", "s5", bw=B1)
    net.addLink("s4", "h6", bw=B1)
    net.addLink("s4", "h7", bw=B1)
    net.addLink("s4", "h8", bw=B1)

    info("*** Add controller\n")
    controller = RemoteController("c0", ip="127.0.0.1", port=6633)
    net.addController(controller)
    net.build()
    #controller.start()
    #s1.start( [controller] )
    #s2.start( [controller] )
    #s1.cmd("ovs-vsctl set port s1-eth4 qos=@newqos -- --id=@newqos create QoS type=linux-htb other-config:max-rate=1000000 queues:123=@1q queues:234=@2q -- --id=@1q create queue other-config:min-rate=100000 other-config:max-rate=700000 -- --id=@2q create queue other-config:min-rate=100000 other-config:max-rate=700000")
    #s1.cmd("ovs-ofctl add-flow s1 nw_src=192.0.0.2,nw_dst=192.0.0.7,actions=enqueue:4:123")
    net.start()
    srv1 = mgr.addContainer(
        "srv1",
        "h1",
        "servernew",
        "python /home/servernew.py",
        docker_args={},
    )  #autonomus
    srv2 = mgr.addContainer(
        "srv2",
        "h2",
        "dev_test",
        "bash",
        docker_args={},
    )  #udp
    srv3 = mgr.addContainer(
        "srv3",
        "h3",
        "eclipse-mosquitto",
        "bash",
        docker_args={},
    )  #brocker
    srv4 = mgr.addContainer(
        "srv4",
        "h4",
        "aksakalli/mqtt-client",
        "bash /home/clientnew.sh",
        docker_args={},
    )
    srv5 = mgr.addContainer(
        "srv5",
        "h5",
        "aksakalli/mqtt-client",
        "bash",
        docker_args={},
    )
    srv6 = mgr.addContainer(
        "srv6",
        "h6",
        "dev_test",
        "bash",
        docker_args={},
    )
    srv7 = mgr.addContainer(
        "srv7",
        "h7",
        "dev_test",
        "bash",
        docker_args={},
    )
    srv8 = mgr.addContainer(
        "srv8",
        "h8",
        "dev_test",
        "bash",
        docker_args={},
    )
    spawnXtermDocker("srv2")
    spawnXtermDocker("srv7")
    CLI(net)
    mgr.removeContainer("srv1")
    mgr.removeContainer("srv2")
    mgr.removeContainer("srv3")
    mgr.removeContainer("srv4")
    mgr.removeContainer("srv5")
    mgr.removeContainer("srv6")
    mgr.removeContainer("srv7")
    mgr.removeContainer("srv8")
    net.stop()
    mgr.stop()
Exemplo n.º 7
0
    info("\n*** Starting network\n")
    net.start()

    srv1 = mgr.addContainer("srv1",
                            "mqttServer",
                            "eclipse-mosquitto",
                            "",
                            docker_args={})
    srv2 = mgr.addContainer("srv2",
                            "webServer",
                            "webserver",
                            "",
                            docker_args={})
    srv3 = mgr.addContainer(
        "srv3",
        "drone",
        "drone",
        "python /drone/drone.py --ip 10.0.0.1 --port 1883 --debug",
        docker_args={})
    srv4 = mgr.addContainer("srv4", "client", "client", "bash", docker_args={})

    spawnXtermDocker("srv4")
    CLI(net)

    mgr.removeContainer("srv1")
    mgr.removeContainer("srv2")
    mgr.removeContainer("srv3")
    mgr.removeContainer("srv4")
    net.stop()
    mgr.stop()
Exemplo n.º 8
0
        docker_args={
            "volumes": FFPP_VOLS,
            "working_dir": "/ffpp_app",
            "nano_cpus": int(3e8),
        },
    )
    time.sleep(1)
    spawnXtermDocker("distributor")
    CLI(net)

    print("- Add the dummy VNF on the host h2.")
    dummy_vnf = mgr.addContainer(
        "dummy_vnf",
        "h2",
        "ffpp",
        "bash",
        docker_args={
            "volumes": FFPP_VOLS,
            "working_dir": "/ffpp_app",
            "nano_cpus": int(3e8),
        },
    )
    spawnXtermDocker("dummy_vnf")
    time.sleep(1)
    CLI(net)

    mgr.removeContainer("distributor")
    mgr.removeContainer("dummy_vnf")
    net.stop()
    mgr.stop()
Exemplo n.º 9
0
def myTopology():
    net = Containernet(
        switch=OVSKernelSwitch,
        build=False,
        autoSetMacs=True,
        autoStaticArp=True,
        link=TCLink,
    )

    mgr = VNFManager(net)
    setLogLevel("info")

    info("*** Add Switches\n")
    sconfig1 = {"dpid": "%016x" % 1}
    sconfig2 = {"dpid": "%016x" % 2}
    sconfig3 = {"dpid": "%016x" % 3}
    sconfig4 = {"dpid": "%016x" % 4}
    net.addSwitch("s1", **sconfig1)
    net.addSwitch("s2", **sconfig2)
    net.addSwitch("s3", **sconfig3)
    net.addSwitch("s4", **sconfig4)
    info("*** Add Hosts\n")
    host_config = dict(inNamespace=True)
    #net.addHost("h1", **host_config, ip="192.0.0.1")
    h1 = net.addDockerHost(
        "h1",
        dimage="dev_test",
        ip="192.0.0.1",
        docker_args={"hostname": "h1"},
    )
    h2 = net.addDockerHost(
        "h2",
        dimage="dev_test",
        ip="192.0.0.2",
        docker_args={"hostname": "h2"},
    )
    h3 = net.addDockerHost(
        "h3",
        dimage="dev_test",
        ip="192.0.0.3",
        docker_args={"hostname": "h3"},
    )
    h4 = net.addDockerHost(
        "h4",
        dimage="dev_test",
        ip="192.0.0.4",
        docker_args={"hostname": "h4"},
    )
    h5 = net.addDockerHost(
        "h5",
        dimage="dev_test",
        ip="192.0.0.5",
        docker_args={"hostname": "h5"},
    )
    h6 = net.addDockerHost(
        "h6",
        dimage="dev_test",
        ip="192.0.0.6",
        docker_args={"hostname": "h6"},
    )
    h7 = net.addDockerHost(
        "h7",
        dimage="dev_test",
        ip="192.0.0.7",
        docker_args={"hostname": "h7"},
    )

    info("*** Add Links\n")
    net.addLink("h1", "s1", bw=B1)
    net.addLink("h2", "s1", bw=B1)
    net.addLink("h3", "s1", bw=B1)
    net.addLink("h4", "s1", bw=B1)
    net.addLink("s1", "s2", bw=B1)
    net.addLink("s2", "s3", bw=B1, delay=DELAY)
    net.addLink("s3", "s4", bw=B1, delay=DELAY)
    net.addLink("s2", "s4", bw=B2)
    net.addLink("s1", "s4", bw=B1)
    net.addLink("s4", "h5", bw=B1)
    net.addLink("s4", "h6", bw=B1)
    net.addLink("s4", "h7", bw=B1)

    info("*** Add controller\n")
    controller = RemoteController("c1", ip="127.0.0.1", port=6633)
    net.addController(controller)
    net.build()
    net.start()
    srv1 = mgr.addContainer(
        "srv1",
        "h1",
        "echo_server",
        "python /home/server_ad.py",
        docker_args={},
    )
    srv2 = mgr.addContainer(
        "srv2",
        "h2",
        "echo_server",
        "python /home/server.py",
        docker_args={},
    )
    srv3 = mgr.addContainer(
        "srv3",
        "h3",
        "echo_server",
        "python /home/server.py",
        docker_args={},
    )
    srv4 = mgr.addContainer(
        "srv4",
        "h4",
        "dev_test",
        "bash",
        docker_args={},
    )
    srv5 = mgr.addContainer(
        "srv5",
        "h5",
        "dev_test",
        "bash",
        docker_args={},
    )
    srv6 = mgr.addContainer(
        "srv6",
        "h6",
        "dev_test",
        "bash",
        docker_args={},
    )
    srv7 = mgr.addContainer(
        "srv7",
        "h7",
        "dev_test",
        "bash",
        docker_args={},
    )
    spawnXtermDocker("srv5")
    spawnXtermDocker("srv1")
    CLI(net)
    mgr.removeContainer("srv1")
    mgr.removeContainer("srv2")
    mgr.removeContainer("srv3")
    mgr.removeContainer("srv4")
    mgr.removeContainer("srv5")
    mgr.removeContainer("srv6")
    mgr.removeContainer("srv7")
    net.stop()
    mgr.stop()