"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(
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)
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()
"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()
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()
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()
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()
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()