Synnefo

#!/usr/bin/env python

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

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

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# or implied, of GRNET S.A.

"""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 sys

import time

from base64 import b64encode

from IPy import IP

from multiprocessing import Process, Queue

from random import choice

from optparse import OptionParser, OptionValueError

from kamaki.clients.compute import ComputeClient

from kamaki.clients.cyclades import CycladesClient

from kamaki.clients.image import ImageClient

from kamaki.clients import ClientError

from fabric.api import *

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"

DEFAULT_PLANKTON = "https://cyclades.okeanos.grnet.gr/plankton"

DEFAULT_PLANKTON_USER = "images@okeanos.grnet.gr"

# 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-"

red = '\x1b[31m'

yellow = '\x1b[33m'

green = '\x1b[32m'

normal = '\x1b[0m'

class burninFormatter(logging.Formatter):

    err_fmt = red + "ERROR: %(msg)s" + normal

    dbg_fmt = green + "* %(msg)s" + normal

    info_fmt = "%(msg)s"

    def __init__(self, fmt="%(levelno)s: %(msg)s"):

        logging.Formatter.__init__(self, fmt)

    def format(self, record):

        format_orig = self._fmt

        # Replace the original format with one customized by logging level

        if record.levelno == 10:    # DEBUG

            self._fmt = burninFormatter.dbg_fmt

        elif record.levelno == 20:  # INFO

            self._fmt = burninFormatter.info_fmt

        elif record.levelno == 40:  # ERROR

            self._fmt = burninFormatter.err_fmt

        result = logging.Formatter.format(self, record)

        self._fmt = format_orig

        return result

log = logging.getLogger("burnin")

log.setLevel(logging.DEBUG)

handler = logging.StreamHandler()

handler.setFormatter(burninFormatter())

log.addHandler(handler)

class UnauthorizedTestCase(unittest.TestCase):

    def test_unauthorized_access(self):

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

        log.info("Authentication test")

        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.plankton = ImageClient(PLANKTON, TOKEN)

        cls.images = cls.plankton.list_public()

        cls.dimages = cls.plankton.list_public(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 system images have unique names"""

        sys_images = filter(lambda x: x['owner'] == PLANKTON_USER,

                            self.dimages)

        names = sorted(map(lambda x: x["name"], sys_images))

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

    def test_005_image_metadata(self):

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

        keys = frozenset(["osfamily", "root_partition"])

        details = self.client.list_images(detail=True)

        for i in details:

            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"""

        log.info("Submit new server request")

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

                                           self.imageid, self.personality)

        log.info("Server id: " + str(server["id"]))

        log.info("Server password: " + server["adminPass"])

        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"""

        log.info("Server 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"""

        log.info("Server 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):

        log.info("Creating server metadata")

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

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

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

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

        userlist = users.split()

        # Determine the username to use for future connections

        # to this host

        cls = type(self)

        if "root" in userlist:

            cls.username = "root"

        elif users == None:

            cls.username = self._connect_loginname(os)

        else:

            cls.username = choice(userlist)

        self.assertIsNotNone(cls.username)

    def test_002d_verify_server_metadata(self):

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

        log.info("Verifying 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"""

        log.info("Waiting for server to become 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_INET,

                                        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"""

        log.info("Validate server's IPv4")

        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"""

        self._skipIf(NO_IPV6, "--no-ipv6 flag enabled")

        log.info("Validate server's IPv6")

        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"""

        log.info("Testing if server responds to pings in IPv4")

        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"""

        self._skipIf(NO_IPV6, "--no-ipv6 flag enabled")

        log.info("Testing if server responds to pings in IPv6")

        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"""

        log.info("Shutting down server")

        self.cyclades.shutdown_server(self.serverid)

    def test_009_server_becomes_stopped(self):

        """Test server becomes STOPPED"""

        log.info("Waiting until 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"""

        log.info("Starting server")

        self.cyclades.start_server(self.serverid)

    def test_011_server_becomes_active(self):

        """Test server becomes ACTIVE again"""

        log.info("Waiting until server becomes ACTIVE")

        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"""

        log.info("Testing if server is actually up and running")

        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")

        self._skipIf(NO_IPV6, "--no-ipv6 flag enabled")

        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")

        self._skipIf(NO_IPV6, "--no-ipv6 flag enabled")

        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")

        log.info("Trying to inject file for personality enforcement")

        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"""

        log.info("Deleting server")

        self.client.delete_server(self.serverid)

    def test_018_server_becomes_deleted(self):

        """Test server becomes DELETED"""

        log.info("Testing if 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"""

        log.info("Test if server is no longer listed")

        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)

        cls.servername = "%s%s for %s" % (SNF_TEST_PREFIX,

                                          TEST_RUN_ID,

                                          cls.imagename)

        #Dictionary initialization for the vms credentials

        cls.serverid = dict()

        cls.username = dict()

        cls.password = dict()

        cls.is_windows = cls.imagename.lower().find("windows") >= 0

    def _skipIf(self, condition, msg):

        if condition:

            self.skipTest(msg)

    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"])