Synnefo

#!/usr/bin/env python

# Copyright 2011 GRNET S.A. All rights reserved.

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"""Perform integration testing on a running Synnefo deployment"""

import __main__

import datetime

import inspect

import logging

import os

import paramiko

import prctl

import subprocess

import signal

import socket

import struct

import sys

import time

import hashlib

from base64 import b64encode

from pwd import getpwuid

from grp import getgrgid

from IPy import IP

from multiprocessing import Process, Queue

from random import choice

from kamaki.clients.compute import ComputeClient

from kamaki.clients.cyclades import CycladesClient

from vncauthproxy.d3des import generate_response as d3des_generate_response

# Use backported unittest functionality if Python < 2.7

try:

    import unittest2 as unittest

except ImportError:

    if sys.version_info < (2, 7):

        raise Exception("The unittest2 package is required for Python < 2.7")

    import unittest

API = None

TOKEN = None

DEFAULT_API = "https://cyclades.okeanos.grnet.gr/api/v1.1"

# A unique id identifying this test run

TEST_RUN_ID = datetime.datetime.strftime(datetime.datetime.now(),

                                         "%Y%m%d%H%M%S")

SNF_TEST_PREFIX = "snf-test-"

# Setup logging (FIXME - verigak)

logging.basicConfig(format="%(message)s")

log = logging.getLogger("burnin")

log.setLevel(logging.INFO)

class UnauthorizedTestCase(unittest.TestCase):

    def test_unauthorized_access(self):

        """Test access without a valid token fails"""

        falseToken = '12345'

        c=ComputeClient(API, falseToken)

        with self.assertRaises(ClientError) as cm:

            c.list_servers()

        self.assertEqual(cm.exception.status, 401)

class ImagesTestCase(unittest.TestCase):

    """Test image lists for consistency"""

    @classmethod

    def setUpClass(cls):

        """Initialize kamaki, get (detailed) list of images"""

        log.info("Getting simple and detailed list of images")

        cls.client = ComputeClient(API, TOKEN)

        cls.images = cls.client.list_images()

        cls.dimages = cls.client.list_images(detail=True)

    def test_001_list_images(self):

        """Test image list actually returns images"""

        self.assertGreater(len(self.images), 0)

    def test_002_list_images_detailed(self):

        """Test detailed image list is the same length as list"""

        self.assertEqual(len(self.dimages), len(self.images))

    def test_003_same_image_names(self):

        """Test detailed and simple image list contain same names"""

        names = sorted(map(lambda x: x["name"], self.images))

        dnames = sorted(map(lambda x: x["name"], self.dimages))

        self.assertEqual(names, dnames)

    def test_004_unique_image_names(self):

        """Test images have unique names"""

        names = sorted(map(lambda x: x["name"], self.images))

        self.assertEqual(sorted(list(set(names))), names)

    def test_005_image_metadata(self):

        """Test every image has specific metadata defined"""

        keys = frozenset(["os", "description", "size"])

        for i in self.dimages:

            self.assertTrue(keys.issubset(i["metadata"]["values"].keys()))

class FlavorsTestCase(unittest.TestCase):

    """Test flavor lists for consistency"""

    @classmethod

    def setUpClass(cls):

        """Initialize kamaki, get (detailed) list of flavors"""

        log.info("Getting simple and detailed list of flavors")

        cls.client = ComputeClient(API, TOKEN)

        cls.flavors = cls.client.list_flavors()

        cls.dflavors = cls.client.list_flavors(detail=True)

    def test_001_list_flavors(self):

        """Test flavor list actually returns flavors"""

        self.assertGreater(len(self.flavors), 0)

    def test_002_list_flavors_detailed(self):

        """Test detailed flavor list is the same length as list"""

        self.assertEquals(len(self.dflavors), len(self.flavors))

    def test_003_same_flavor_names(self):

        """Test detailed and simple flavor list contain same names"""

        names = sorted(map(lambda x: x["name"], self.flavors))

        dnames = sorted(map(lambda x: x["name"], self.dflavors))

        self.assertEqual(names, dnames)

    def test_004_unique_flavor_names(self):

        """Test flavors have unique names"""

        names = sorted(map(lambda x: x["name"], self.flavors))

        self.assertEqual(sorted(list(set(names))), names)

    def test_005_well_formed_flavor_names(self):

        """Test flavors have names of the form CxxRyyDzz

        Where xx is vCPU count, yy is RAM in MiB, zz is Disk in GiB

        """

        for f in self.dflavors:

            self.assertEqual("C%dR%dD%d" % (f["cpu"], f["ram"], f["disk"]),

                             f["name"],

                             "Flavor %s does not match its specs." % f["name"])

class ServersTestCase(unittest.TestCase):

    """Test server lists for consistency"""

    @classmethod

    def setUpClass(cls):

        """Initialize kamaki, get (detailed) list of servers"""

        log.info("Getting simple and detailed list of servers")

        cls.client = ComputeClient(API, TOKEN)

        cls.servers = cls.client.list_servers()

        cls.dservers = cls.client.list_servers(detail=True)

    def test_001_list_servers(self):

        """Test server list actually returns servers"""

        self.assertGreater(len(self.servers), 0)

    def test_002_list_servers_detailed(self):

        """Test detailed server list is the same length as list"""

        self.assertEqual(len(self.dservers), len(self.servers))

    def test_003_same_server_names(self):

        """Test detailed and simple flavor list contain same names"""

        names = sorted(map(lambda x: x["name"], self.servers))

        dnames = sorted(map(lambda x: x["name"], self.dservers))

        self.assertEqual(names, dnames)

# This class gets replicated into actual TestCases dynamically

class SpawnServerTestCase(unittest.TestCase):

    """Test scenario for server of the specified image"""

    @classmethod

    def setUpClass(cls):

        """Initialize a kamaki instance"""

        log.info("Spawning server for image `%s'", cls.imagename)

        cls.client = ComputeClient(API, TOKEN)

        cls.cyclades = CycladesClient(API, TOKEN)

    def _get_ipv4(self, server):

        """Get the public IPv4 of a server from the detailed server info"""

        public_addrs = filter(lambda x: x["id"] == "public",

                              server["addresses"]["values"])

        self.assertEqual(len(public_addrs), 1)

        ipv4_addrs = filter(lambda x: x["version"] == 4,

                            public_addrs[0]["values"])

        self.assertEqual(len(ipv4_addrs), 1)

        return ipv4_addrs[0]["addr"]

    def _get_ipv6(self, server):

        """Get the public IPv6 of a server from the detailed server info"""

        public_addrs = filter(lambda x: x["id"] == "public",

                              server["addresses"]["values"])

        self.assertEqual(len(public_addrs), 1)

        ipv6_addrs = filter(lambda x: x["version"] == 6,

                            public_addrs[0]["values"])

        self.assertEqual(len(ipv6_addrs), 1)

        return ipv6_addrs[0]["addr"]

    def _connect_loginname(self, os):

        """Return the login name for connections based on the server OS"""

        if os in ("Ubuntu", "Kubuntu", "Fedora"):

            return "user"

        elif os in ("windows", "windows_alpha1"):

            return "Administrator"

        else:

            return "root"

    def _verify_server_status(self, current_status, new_status):

        """Verify a server has switched to a specified status"""

        server = self.client.get_server_details(self.serverid)

        if server["status"] not in (current_status, new_status):

            return None  # Do not raise exception, return so the test fails

        self.assertEquals(server["status"], new_status)

    def _get_connected_tcp_socket(self, family, host, port):

        """Get a connected socket from the specified family to host:port"""

        sock = None

        for res in \

            socket.getaddrinfo(host, port, family, socket.SOCK_STREAM, 0,

                               socket.AI_PASSIVE):

            af, socktype, proto, canonname, sa = res

            try:

                sock = socket.socket(af, socktype, proto)

            except socket.error as msg:

                sock = None

                continue

            try:

                sock.connect(sa)

            except socket.error as msg:

                sock.close()

                sock = None

                continue

        self.assertIsNotNone(sock)

        return sock

    def _ping_once(self, ipv6, ip):

        """Test server responds to a single IPv4 or IPv6 ping"""

        cmd = "ping%s -c 2 -w 3 %s" % ("6" if ipv6 else "", ip)

        ping = subprocess.Popen(cmd, shell=True,

                                stdout=subprocess.PIPE, stderr=subprocess.PIPE)

        (stdout, stderr) = ping.communicate()

        ret = ping.wait()

        self.assertEquals(ret, 0)

    def _get_hostname_over_ssh(self, hostip, username, password):

        ssh = paramiko.SSHClient()

        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        try:

            ssh.connect(hostip, username=username, password=password)

        except socket.error:

            raise AssertionError

        stdin, stdout, stderr = ssh.exec_command("hostname")

        lines = stdout.readlines()

        self.assertEqual(len(lines), 1)

        return lines[0]

    def _try_until_timeout_expires(self, warn_timeout, fail_timeout,

                                   opmsg, callable, *args, **kwargs):

        if warn_timeout == fail_timeout:

            warn_timeout = fail_timeout + 1

        warn_tmout = time.time() + warn_timeout

        fail_tmout = time.time() + fail_timeout

        while True:

            self.assertLess(time.time(), fail_tmout,

                            "operation `%s' timed out" % opmsg)

            if time.time() > warn_tmout:

                log.warning("Server %d: `%s' operation `%s' not done yet",

                            self.serverid, self.servername, opmsg)

            try:

                log.info("%s... " % opmsg)

                return callable(*args, **kwargs)

            except AssertionError:

                pass

            time.sleep(self.query_interval)

    def _insist_on_tcp_connection(self, family, host, port):

        familystr = {socket.AF_INET: "IPv4", socket.AF_INET6: "IPv6",

                     socket.AF_UNSPEC: "Unspecified-IPv4/6"}

        msg = "connect over %s to %s:%s" % \

              (familystr.get(family, "Unknown"), host, port)

        sock = self._try_until_timeout_expires(

                self.action_timeout, self.action_timeout,

                msg, self._get_connected_tcp_socket,

                family, host, port)

        return sock

    def _insist_on_status_transition(self, current_status, new_status,

                                    fail_timeout, warn_timeout=None):

        msg = "Server %d: `%s', waiting for %s -> %s" % \

              (self.serverid, self.servername, current_status, new_status)

        if warn_timeout is None:

            warn_timeout = fail_timeout

        self._try_until_timeout_expires(warn_timeout, fail_timeout,

                                        msg, self._verify_server_status,

                                        current_status, new_status)

        # Ensure the status is actually the expected one

        server = self.client.get_server_details(self.serverid)

        self.assertEquals(server["status"], new_status)

    def _insist_on_ssh_hostname(self, hostip, username, password):

        msg = "SSH to %s, as %s/%s" % (hostip, username, password)

        hostname = self._try_until_timeout_expires(

                self.action_timeout, self.action_timeout,

                msg, self._get_hostname_over_ssh,

                hostip, username, password)

        # The hostname must be of the form 'prefix-id'

        self.assertTrue(hostname.endswith("-%d\n" % self.serverid))

    def _check_file_through_ssh(self, hostip, username, password, remotepath, content):

        msg = "Trying file injection through SSH to %s, as %s/%s" % (hostip, username, password)

        log.info(msg)

        try:

            ssh = paramiko.SSHClient()

            ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

            ssh.connect(hostip, username=username, password=password)

        except socket.error:

            raise AssertionError

        transport = paramiko.Transport((hostip,22))

        transport.connect(username = username, password = password)

        localpath = '/tmp/'+SNF_TEST_PREFIX+'injection'

        sftp = paramiko.SFTPClient.from_transport(transport)

        sftp.get(remotepath, localpath)

        sftp.close()

        transport.close()

        f = open(localpath)

        remote_content = b64encode(f.read())

        # Check if files are the same

        return (remote_content == content)

    def _skipIf(self, condition, msg):

        if condition:

            self.skipTest(msg)

    def test_001_submit_create_server(self):

        """Test submit create server request"""

        server = self.client.create_server(self.servername, self.flavorid,

                                           self.imageid, self.personality)

        self.assertEqual(server["name"], self.servername)

        self.assertEqual(server["flavorRef"], self.flavorid)

        self.assertEqual(server["imageRef"], self.imageid)

        self.assertEqual(server["status"], "BUILD")

        # Update class attributes to reflect data on building server

        cls = type(self)

        cls.serverid = server["id"]

        cls.username = None

        cls.passwd = server["adminPass"]

    def test_002a_server_is_building_in_list(self):

        """Test server is in BUILD state, in server list"""

        servers = self.client.list_servers(detail=True)

        servers = filter(lambda x: x["name"] == self.servername, servers)

        self.assertEqual(len(servers), 1)

        server = servers[0]

        self.assertEqual(server["name"], self.servername)

        self.assertEqual(server["flavorRef"], self.flavorid)

        self.assertEqual(server["imageRef"], self.imageid)

        self.assertEqual(server["status"], "BUILD")

    def test_002b_server_is_building_in_details(self):

        """Test server is in BUILD state, in details"""

        server = self.client.get_server_details(self.serverid)

        self.assertEqual(server["name"], self.servername)

        self.assertEqual(server["flavorRef"], self.flavorid)

        self.assertEqual(server["imageRef"], self.imageid)

        self.assertEqual(server["status"], "BUILD")

    def test_002c_set_server_metadata(self):

        image = self.client.get_image_details(self.imageid)

        os = image["metadata"]["values"]["os"]

        loginname = image["metadata"]["values"].get("users", None)

        self.client.update_server_metadata(self.serverid, OS=os)

        # Determine the username to use for future connections

        # to this host

        cls = type(self)

        cls.username = loginname

        if not cls.username:

            cls.username = self._connect_loginname(os)

        self.assertIsNotNone(cls.username)

    def test_002d_verify_server_metadata(self):

        """Test server metadata keys are set based on image metadata"""

        servermeta = self.client.get_server_metadata(self.serverid)

        imagemeta = self.client.get_image_metadata(self.imageid)

        self.assertEqual(servermeta["OS"], imagemeta["os"])

    def test_003_server_becomes_active(self):

        """Test server becomes ACTIVE"""

        self._insist_on_status_transition("BUILD", "ACTIVE",

                                         self.build_fail, self.build_warning)

    def test_003a_get_server_oob_console(self):

        """Test getting OOB server console over VNC

        Implementation of RFB protocol follows

        http://www.realvnc.com/docs/rfbproto.pdf.

        """

        console = self.cyclades.get_server_console(self.serverid)

        self.assertEquals(console['type'], "vnc")

        sock = self._insist_on_tcp_connection(socket.AF_UNSPEC,

                                        console["host"], console["port"])

        # Step 1. ProtocolVersion message (par. 6.1.1)

        version = sock.recv(1024)

        self.assertEquals(version, 'RFB 003.008\n')

        sock.send(version)

        # Step 2. Security (par 6.1.2): Only VNC Authentication supported

        sec = sock.recv(1024)

        self.assertEquals(list(sec), ['\x01', '\x02'])

        # Step 3. Request VNC Authentication (par 6.1.2)

        sock.send('\x02')

        # Step 4. Receive Challenge (par 6.2.2)

        challenge = sock.recv(1024)

        self.assertEquals(len(challenge), 16)

        # Step 5. DES-Encrypt challenge, use password as key (par 6.2.2)

        response = d3des_generate_response(

            (console["password"] + '\0' * 8)[:8], challenge)

        sock.send(response)

        # Step 6. SecurityResult (par 6.1.3)

        result = sock.recv(4)

        self.assertEquals(list(result), ['\x00', '\x00', '\x00', '\x00'])

        sock.close()

    def test_004_server_has_ipv4(self):

        """Test active server has a valid IPv4 address"""

        server = self.client.get_server_details(self.serverid)

        ipv4 = self._get_ipv4(server)

        self.assertEquals(IP(ipv4).version(), 4)

    def test_005_server_has_ipv6(self):

        """Test active server has a valid IPv6 address"""

        server = self.client.get_server_details(self.serverid)

        ipv6 = self._get_ipv6(server)

        self.assertEquals(IP(ipv6).version(), 6)

    def test_006_server_responds_to_ping_IPv4(self):

        """Test server responds to ping on IPv4 address"""

        server = self.client.get_server_details(self.serverid)

        ip = self._get_ipv4(server)

        self._try_until_timeout_expires(self.action_timeout,

                                        self.action_timeout,

                                        "PING IPv4 to %s" % ip,

                                        self._ping_once,

                                        False, ip)

    def test_007_server_responds_to_ping_IPv6(self):

        """Test server responds to ping on IPv6 address"""

        server = self.client.get_server_details(self.serverid)

        ip = self._get_ipv6(server)

        self._try_until_timeout_expires(self.action_timeout,

                                        self.action_timeout,

                                        "PING IPv6 to %s" % ip,

                                        self._ping_once,

                                        True, ip)

    def test_008_submit_shutdown_request(self):

        """Test submit request to shutdown server"""

        self.cyclades.shutdown_server(self.serverid)

    def test_009_server_becomes_stopped(self):

        """Test server becomes STOPPED"""

        self._insist_on_status_transition("ACTIVE", "STOPPED",

                                         self.action_timeout,

                                         self.action_timeout)

    def test_010_submit_start_request(self):

        """Test submit start server request"""

        self.cyclades.start_server(self.serverid)

    def test_011_server_becomes_active(self):

        """Test server becomes ACTIVE again"""

        self._insist_on_status_transition("STOPPED", "ACTIVE",

                                         self.action_timeout,

                                         self.action_timeout)

    def test_011a_server_responds_to_ping_IPv4(self):

        """Test server OS is actually up and running again"""

        self.test_006_server_responds_to_ping_IPv4()

    def test_012_ssh_to_server_IPv4(self):

        """Test SSH to server public IPv4 works, verify hostname"""

        self._skipIf(self.is_windows, "only valid for Linux servers")

        server = self.client.get_server_details(self.serverid)

        self._insist_on_ssh_hostname(self._get_ipv4(server),

                                     self.username, self.passwd)

    def test_013_ssh_to_server_IPv6(self):

        """Test SSH to server public IPv6 works, verify hostname"""

        self._skipIf(self.is_windows, "only valid for Linux servers")

        server = self.client.get_server_details(self.serverid)

        self._insist_on_ssh_hostname(self._get_ipv6(server),

                                     self.username, self.passwd)

    def test_014_rdp_to_server_IPv4(self):

        "Test RDP connection to server public IPv4 works"""

        self._skipIf(not self.is_windows, "only valid for Windows servers")

        server = self.client.get_server_details(self.serverid)

        ipv4 = self._get_ipv4(server)

        sock = _insist_on_tcp_connection(socket.AF_INET, ipv4, 3389)

        # No actual RDP processing done. We assume the RDP server is there

        # if the connection to the RDP port is successful.

        # FIXME: Use rdesktop, analyze exit code? see manpage [costasd]

        sock.close()

    def test_015_rdp_to_server_IPv6(self):

        "Test RDP connection to server public IPv6 works"""

        self._skipIf(not self.is_windows, "only valid for Windows servers")

        server = self.client.get_server_details(self.serverid)

        ipv6 = self._get_ipv6(server)

        sock = _get_tcp_connection(socket.AF_INET6, ipv6, 3389)

        # No actual RDP processing done. We assume the RDP server is there

        # if the connection to the RDP port is successful.

        sock.close()

    def test_016_personality_is_enforced(self):

        """Test file injection for personality enforcement"""

        self._skipIf(self.is_windows, "only implemented for Linux servers")

        self._skipIf(self.personality == None, "No personality file selected")

        server = self.client.get_server_details(self.serverid)

        for inj_file in self.personality:

            equal_files = self._check_file_through_ssh(self._get_ipv4(server), inj_file['owner'], 

                                                       self.passwd, inj_file['path'], inj_file['contents'])

            self.assertTrue(equal_files)

    def test_017_submit_delete_request(self):

        """Test submit request to delete server"""

        self.client.delete_server(self.serverid)

    def test_018_server_becomes_deleted(self):

        """Test server becomes DELETED"""

        self._insist_on_status_transition("ACTIVE", "DELETED",

                                         self.action_timeout,

                                         self.action_timeout)

    def test_019_server_no_longer_in_server_list(self):

        """Test server is no longer in server list"""

        servers = self.client.list_servers()

        self.assertNotIn(self.serverid, [s["id"] for s in servers])

class NetworkTestCase(unittest.TestCase):

    """ Testing networking in cyclades """

    @classmethod

    def setUpClass(cls):

        "Initialize kamaki, get list of current networks"

        cls.client = CycladesClient(API, TOKEN)

        cls.compute = ComputeClient(API, TOKEN)

        images = cls.compute.list_images(detail = True)

        flavors = cls.compute.list_flavors(detail = True)

        cls.imageid = choice([im['id'] for im in images if not im['name'].lower().find("windows") >= 0])

        cls.flavorid = choice([f['id'] for f in flavors if f['disk'] >= 20])

        for image in images:

            if image['id'] == cls.imageid:

                imagename = image['name']

        cls.servername = "%s%s for %s" % (SNF_TEST_PREFIX, TEST_RUN_ID, imagename)

        #Dictionary initialization for the vms credentials

        cls.serverid = dict()

        cls.username = dict()

        cls.password = dict()

    def _get_ipv4(self, server):

        """Get the public IPv4 of a server from the detailed server info"""

        public_addrs = filter(lambda x: x["id"] == "public",

                              server["addresses"]["values"])

        self.assertEqual(len(public_addrs), 1)

        ipv4_addrs = filter(lambda x: x["version"] == 4,

                            public_addrs[0]["values"])

        self.assertEqual(len(ipv4_addrs), 1)

        return ipv4_addrs[0]["addr"]

    def _connect_loginname(self, os):

        """Return the login name for connections based on the server OS"""

        if os in ("Ubuntu", "Kubuntu", "Fedora"):

            return "user"

        elif os in ("windows", "windows_alpha1"):

            return "Administrator"

        else:

            return "root"

    def test_0001_submit_create_server_A(self):

        """Test submit create server request"""

        serverA = self.client.create_server(self.servername, self.flavorid,

                                           self.imageid, personality=None)

        self.assertEqual(server["name"], self.servername)

        self.assertEqual(server["flavorRef"], self.flavorid)

        self.assertEqual(server["imageRef"], self.imageid)

        self.assertEqual(server["status"], "BUILD")

        # Update class attributes to reflect data on building server

        cls = type(self)

        cls.serverid['A'] = serverA["id"]

        cls.username['A'] = None

        cls.password['A'] = serverA["adminPass"]

    def test_0001_submit_create_server_B(self):

        """Test submit create server request"""

        serverB = self.client.create_server(self.servername, self.flavorid,

                                           self.imageid, personality=None)

        self.assertEqual(server["name"], self.servername)

        self.assertEqual(server["flavorRef"], self.flavorid)

        self.assertEqual(server["imageRef"], self.imageid)

        self.assertEqual(server["status"], "BUILD")

        # Update class attributes to reflect data on building server

        cls = type(self)

        cls.serverid['B'] = serverB["id"]

        cls.username['B'] = None

        cls.password['B'] = serverB["adminPass"]

    def test_0001_serverA_becomes_active(self):

        """Test server becomes ACTIVE"""

        fail_tmout = time.time()+self.action_timeout

        while True:

            d = self.client.get_server_details(self.serverid['A'])

            status = d['status']

            if status == 'ACTIVE':

                active = True

                break

            elif time.time() > fail_tmout:

                self.assertLess(time.time(), fail_tmout)

            else:

                time.sleep(self.query_interval)

        self.assertTrue(active)

    def test_0001_serverB_becomes_active(self):

        """Test server becomes ACTIVE"""

        fail_tmout = time.time()+self.action_timeout

        while True:

            d = self.client.get_server_details(self.serverid['B'])

            status = d['status']

            if status == 'ACTIVE':

                active = True

                break

            elif time.time() > fail_tmout:

                self.assertLess(time.time(), fail_tmout)

            else:

                time.sleep(self.query_interval)

        self.assertTrue(active)

    def test_001_create_network(self):

        """Test submit create network request"""

        name = SNF_TEST_PREFIX+TEST_RUN_ID

        previous_num = len(self.client.list_networks())

        network =  self.client.create_network(name)        

        #Test if right name is assigned

        self.assertEqual(network['name'], name)

        # Update class attributes

        cls = type(self)

        cls.networkid = network['id']

        networks = self.client.list_networks()

        #Test if new network is created

        self.assertTrue(len(networks) > previous_num)

    def test_002_connect_to_network(self):

        """Test connect VM to network"""

        self.client.connect_server(self.serverid['A'], self.networkid)

        self.client.connect_server(self.serverid['B'], self.networkid)

        #Insist on connecting until action timeout

        fail_tmout = time.time()+self.action_timeout

        while True:

            connected = (self.client.get_network_details(self.networkid))

            connections = connected['servers']['values']

            if (self.serverid['A'] in connections) and (self.serverid['B'] in connections):

                conn_exists = True

                break

            elif time.time() > fail_tmout:

                self.assertLess(time.time(), fail_tmout)

            else:

                time.sleep(self.query_interval)

        self.assertTrue(conn_exists)

    def test_002a_setup_interface_A(self):

        server = self.client.get_server_details(self.serverid['A'])

        image = self.client.get_image_details(self.serverid['A'])

        os = image['metadata']['values']['os']

        loginname = image["metadata"]["values"].get("users", None)

        hostip = self._get_ipv4(server) 

        if not loginname:

            loginname = self._connect_loginname(os)

        try:

            ssh = paramiko.SSHClient()

            ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

            ssh.connect(hostip, username = loginname, password = self.password['A'])

        except socket.error:

            raise AssertionError

        stdin, stdout, stderr = ssh.exec_command("ifconfig eth1 %s up"%("192.168.0.42"))

        lines = stdout.readlines()

        self.assertEqual(len(lines), 0)

    def test_002b_setup_interface_B(self):

        server = self.client.get_server_details(self.serverid['B'])

        image = self.client.get_image_details(self.serverid['B'])

        os = image['metadata']['values']['os']

        loginname = image["metadata"]["values"].get("users", None)

        hostip = self._get_ipv4(server) 

        if not loginname:

            loginname = self._connect_loginname(os)

        try:

            ssh = paramiko.SSHClient()

            ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

            ssh.connect(hostip, username = loginname, password = self.password['B'])

        except socket.error:

            raise AssertionError

        stdin, stdout, stderr = ssh.exec_command("ifconfig eth1 %s up"%("192.168.0.43"))

        lines = stdout.readlines()

        self.assertEqual(len(lines), 0)

    def test_002a_test_connection_exists(self):

        """Ping serverB from serverA to test if connection exists"""

        server = self.client.get_server_details(self.serverid['A'])

        image = self.client.get_image_details(self.serverid['A'])

        os = image['metadata']['values']['os']

        loginname = image["metadata"]["values"].get("users", None)

        hostip = self._get_ipv4(server)

        if not loginname:

            loginname = self._connect_loginname(os)

        try:

            ssh = paramiko.SSHClient()

            ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

            ssh.connect(hostip, username = loginname, password = self.password['A'])

        except socket.error:

            raise AssertionError

        cmd = "if ping -c 2 -w 3 %s >/dev/null; then echo \"True\"; fi;" % ("192.168.0.43")

        stdin, stdout, stderr = ssh.exec_command(cmd)

        lines = stdout.readlines()

        for i in lines:

            if i=='True\n':

                exists = True

        self.assertTrue(exists)

    def test_003_disconnect_from_network(self):

        prev_state = self.client.get_network_details(self.networkid)

        prev_conn = len(prev_state['servers']['values'])

        self.client.disconnect_server(self.serverid['A'], self.networkid)

        self.client.disconnect_server(self.serverid['B'], self.networkid)

        #Insist on deleting until action timeout

        fail_tmout = time.time()+self.action_timeout

        while True:

            connected = (self.client.get_network_details(self.networkid))

            connections = connected['servers']['values']

            if (self.serverid['A'] not in connections) and (self.serverid['B'] not in connections):

                conn_exists = False

                break

            elif time.time() > fail_tmout:

                self.assertLess(time.time(), fail_tmout)

            else:

                time.sleep(self.query_interval)

        self.assertFalse(conn_exists)

    def test_004_destroy_network(self):

        """Test submit delete network request"""

        self.client.delete_network(self.networkid)        

        networks = self.client.list_networks()

        curr_net = []

        for net in networks:

            curr_net.append(net['id'])

        self.assertTrue(self.networkid not in curr_net)

    def test_005_cleanup_servers(self):

        """Cleanup servers created for this test"""

        self.compute.delete_server(self.serverid['A'])

        self.compute.delete_server(self.serverid['B'])

        fail_tmout = time.time()+self.action_timeout

        #Ensure server gets deleted

        status = dict() 

        while True:

            details = self.compute.get_server_details(self.serverid['A'])

            status['A'] = details['status']

            details = self.compute.get_server_details(self.serverid['B'])

            status['B'] = details['status']

            if (status['A'] == 'DELETED') and (status['B'] == 'DELETED'):

                deleted = True

                break

            elif time.time() > fail_tmout: 

                self.assertLess(time.time(), fail_tmout)

            else:

                time.sleep(self.query_interval)

        self.assertTrue(deleted)

class TestRunnerProcess(Process):

    """A distinct process used to execute part of the tests in parallel"""

    def __init__(self, **kw):

        Process.__init__(self, **kw)

        kwargs = kw["kwargs"]

        self.testq = kwargs["testq"]

        self.runner = kwargs["runner"]

    def run(self):

        # Make sure this test runner process dies with the parent

        # and is not left behind.

        #

        # WARNING: This uses the prctl(2) call and is

        # Linux-specific.

        prctl.set_pdeathsig(signal.SIGHUP)

        while True:

            log.debug("I am process %d, GETting from queue is %s",

                     os.getpid(), self.testq)

            msg = self.testq.get()

            log.debug("Dequeued msg: %s", msg)

            if msg == "TEST_RUNNER_TERMINATE":

                raise SystemExit

            elif issubclass(msg, unittest.TestCase):

                # Assemble a TestSuite, and run it

                suite = unittest.TestLoader().loadTestsFromTestCase(msg)

                self.runner.run(suite)

            else:

                raise Exception("Cannot handle msg: %s" % msg)

def _run_cases_in_parallel(cases, fanout=1, runner=None):

    """Run instances of TestCase in parallel, in a number of distinct processes

    The cases iterable specifies the TestCases to be executed in parallel,

    by test runners running in distinct processes.

    The fanout parameter specifies the number of processes to spawn,

    and defaults to 1.

    The runner argument specifies the test runner class to use inside each

    runner process.

    """

    if runner is None:

        runner = unittest.TextTestRunner(verbosity=2, failfast=True)

    # testq: The master process enqueues TestCase objects into this queue,

    #        test runner processes pick them up for execution, in parallel.

    testq = Queue()

    runners = []

    for i in xrange(0, fanout):

        kwargs = dict(testq=testq, runner=runner)

        runners.append(TestRunnerProcess(kwargs=kwargs))

    log.info("Spawning %d test runner processes", len(runners))

    for p in runners:

        p.start()

    log.debug("Spawned %d test runners, PIDs are %s",

              len(runners), [p.pid for p in runners])

    # Enqueue test cases

    map(testq.put, cases)

    map(testq.put, ["TEST_RUNNER_TERMINATE"] * len(runners))

    log.debug("Joining %d processes", len(runners))

    for p in runners:

        p.join()

    log.debug("Done joining %d processes", len(runners))

def _spawn_server_test_case(**kwargs):

    """Construct a new unit test case class from SpawnServerTestCase"""

    name = "SpawnServerTestCase_%s" % kwargs["imageid"]

    cls = type(name, (SpawnServerTestCase,), kwargs)

    # Patch extra parameters into test names by manipulating method docstrings

    for (mname, m) in \

        inspect.getmembers(cls, lambda x: inspect.ismethod(x)):

            if hasattr(m, __doc__):

                m.__func__.__doc__ = "[%s] %s" % (imagename, m.__doc__)

    # Make sure the class can be pickled, by listing it among

    # the attributes of __main__. A PicklingError is raised otherwise.

    setattr(__main__, name, cls)

    return cls 

def _spawn_network_test_case(**kwargs):

    """Construct a new unit test case class from NetworkTestCase"""

    name = "NetworkTestCase"+TEST_RUN_ID

    cls = type(name, (NetworkTestCase,), kwargs)

    # Make sure the class can be pickled, by listing it among

    # the attributes of __main__. A PicklingError is raised otherwise.

    setattr(__main__, name, cls)

    return cls 

def cleanup_servers(delete_stale=False):

    c = ComputeClient(API, TOKEN)

    servers = c.list_servers()

    stale = [s for s in servers if s["name"].startswith(SNF_TEST_PREFIX)]

    if len(stale) == 0:

        return

    print >> sys.stderr, "Found these stale servers from previous runs:"

    print "    " + \

          "\n    ".join(["%d: %s" % (s["id"], s["name"]) for s in stale])

    if delete_stale:

        print >> sys.stderr, "Deleting %d stale servers:" % len(stale)

        for server in stale:

            c.delete_server(server["id"])

        print >> sys.stderr, "    ...done"

    else:

        print >> sys.stderr, "Use --delete-stale to delete them."

def parse_arguments(args):

    from optparse import OptionParser