# Copyright 2012 OpenStack Foundation
# Copyright 2013 IBM Corp.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import logging
import os
import six
import subprocess

from ironicclient import exc as ironic_exceptions
import netaddr
from neutronclient.common import exceptions as exc
from novaclient import exceptions as nova_exceptions

from tempest.api.network import common as net_common
from tempest import clients
from tempest.common import isolated_creds
from tempest.common.utils import data_utils
from tempest.common.utils.linux import remote_client
from tempest import config
from tempest import exceptions
from tempest.openstack.common import log
import tempest.test

CONF = config.CONF

LOG = log.getLogger(__name__)

# NOTE(afazekas): Workaround for the stdout logging
LOG_nova_client = logging.getLogger('novaclient.client')
LOG_nova_client.addHandler(log.NullHandler())

LOG_cinder_client = logging.getLogger('cinderclient.client')
LOG_cinder_client.addHandler(log.NullHandler())


class OfficialClientTest(tempest.test.BaseTestCase):
    """
    Official Client test base class for scenario testing.

    Official Client tests are tests that have the following characteristics:

     * Test basic operations of an API, typically in an order that
       a regular user would perform those operations
     * Test only the correct inputs and action paths -- no fuzz or
       random input data is sent, only valid inputs.
     * Use only the default client tool for calling an API
    """

    @classmethod
    def setUpClass(cls):
        super(OfficialClientTest, cls).setUpClass()
        cls.isolated_creds = isolated_creds.IsolatedCreds(
            cls.__name__, tempest_client=False,
            network_resources=cls.network_resources)

        username, password, tenant_name = cls.credentials()

        cls.manager = clients.OfficialClientManager(
            username, password, tenant_name)
        cls.compute_client = cls.manager.compute_client
        cls.image_client = cls.manager.image_client
        cls.baremetal_client = cls.manager.baremetal_client
        cls.identity_client = cls.manager.identity_client
        cls.network_client = cls.manager.network_client
        cls.volume_client = cls.manager.volume_client
        cls.object_storage_client = cls.manager.object_storage_client
        cls.orchestration_client = cls.manager.orchestration_client
        cls.data_processing_client = cls.manager.data_processing_client
        cls.resource_keys = {}
        cls.os_resources = []

    @classmethod
    def _get_credentials(cls, get_creds, prefix):
        if CONF.compute.allow_tenant_isolation:
            username, tenant_name, password = get_creds()
        else:
            username = getattr(CONF.identity, prefix + 'username')
            password = getattr(CONF.identity, prefix + 'password')
            tenant_name = getattr(CONF.identity, prefix + 'tenant_name')
        return username, password, tenant_name

    @classmethod
    def credentials(cls):
        return cls._get_credentials(cls.isolated_creds.get_primary_creds, '')

    @classmethod
    def alt_credentials(cls):
        return cls._get_credentials(cls.isolated_creds.get_alt_creds, 'alt_')

    @classmethod
    def admin_credentials(cls):
        return cls._get_credentials(cls.isolated_creds.get_admin_creds,
                                    'admin_')

    @staticmethod
    def cleanup_resource(resource, test_name):

        LOG.debug("Deleting %r from shared resources of %s" %
                  (resource, test_name))
        try:
            # OpenStack resources are assumed to have a delete()
            # method which destroys the resource...
            resource.delete()
        except Exception as e:
            # If the resource is already missing, mission accomplished.
            # add status code as workaround for bug 1247568
            if (e.__class__.__name__ == 'NotFound' or
                    (hasattr(e, 'status_code') and e.status_code == 404)):
                return
            raise

        def is_deletion_complete():
            # Deletion testing is only required for objects whose
            # existence cannot be checked via retrieval.
            if isinstance(resource, dict):
                return True
            try:
                resource.get()
            except Exception as e:
                # Clients are expected to return an exception
                # called 'NotFound' if retrieval fails.
                if e.__class__.__name__ == 'NotFound':
                    return True
                raise
            return False

        # Block until resource deletion has completed or timed-out
        tempest.test.call_until_true(is_deletion_complete, 10, 1)

    @classmethod
    def tearDownClass(cls):
        # NOTE(jaypipes): Because scenario tests are typically run in a
        # specific order, and because test methods in scenario tests
        # generally create resources in a particular order, we destroy
        # resources in the reverse order in which resources are added to
        # the scenario test class object
        while cls.os_resources:
            thing = cls.os_resources.pop()
            cls.cleanup_resource(thing, cls.__name__)
        cls.isolated_creds.clear_isolated_creds()
        super(OfficialClientTest, cls).tearDownClass()

    @classmethod
    def set_resource(cls, key, thing):
        LOG.debug("Adding %r to shared resources of %s" %
                  (thing, cls.__name__))
        cls.resource_keys[key] = thing
        cls.os_resources.append(thing)

    @classmethod
    def get_resource(cls, key):
        return cls.resource_keys[key]

    @classmethod
    def remove_resource(cls, key):
        thing = cls.resource_keys[key]
        cls.os_resources.remove(thing)
        del cls.resource_keys[key]

    def status_timeout(self, things, thing_id, expected_status,
                       error_status='ERROR',
                       not_found_exception=nova_exceptions.NotFound):
        """
        Given a thing and an expected status, do a loop, sleeping
        for a configurable amount of time, checking for the
        expected status to show. At any time, if the returned
        status of the thing is ERROR, fail out.
        """
        self._status_timeout(things, thing_id,
                             expected_status=expected_status,
                             error_status=error_status,
                             not_found_exception=not_found_exception)

    def delete_timeout(self, things, thing_id,
                       error_status='ERROR',
                       not_found_exception=nova_exceptions.NotFound):
        """
        Given a thing, do a loop, sleeping
        for a configurable amount of time, checking for the
        deleted status to show. At any time, if the returned
        status of the thing is ERROR, fail out.
        """
        self._status_timeout(things,
                             thing_id,
                             allow_notfound=True,
                             error_status=error_status,
                             not_found_exception=not_found_exception)

    def _status_timeout(self,
                        things,
                        thing_id,
                        expected_status=None,
                        allow_notfound=False,
                        error_status='ERROR',
                        not_found_exception=nova_exceptions.NotFound):

        log_status = expected_status if expected_status else ''
        if allow_notfound:
            log_status += ' or NotFound' if log_status != '' else 'NotFound'

        def check_status():
            # python-novaclient has resources available to its client
            # that all implement a get() method taking an identifier
            # for the singular resource to retrieve.
            try:
                thing = things.get(thing_id)
            except not_found_exception:
                if allow_notfound:
                    return True
                else:
                    raise

            new_status = thing.status

            # Some components are reporting error status in lower case
            # so case sensitive comparisons can really mess things
            # up.
            if new_status.lower() == error_status.lower():
                message = ("%s failed to get to expected status (%s). "
                           "In %s state.") % (thing, expected_status,
                                              new_status)
                raise exceptions.BuildErrorException(message,
                                                     server_id=thing_id)
            elif new_status == expected_status and expected_status is not None:
                return True  # All good.
            LOG.debug("Waiting for %s to get to %s status. "
                      "Currently in %s status",
                      thing, log_status, new_status)
        if not tempest.test.call_until_true(
            check_status,
            CONF.compute.build_timeout,
            CONF.compute.build_interval):
            message = ("Timed out waiting for thing %s "
                       "to become %s") % (thing_id, log_status)
            raise exceptions.TimeoutException(message)

    def _create_loginable_secgroup_rule_nova(self, client=None,
                                             secgroup_id=None):
        if client is None:
            client = self.compute_client
        if secgroup_id is None:
            sgs = client.security_groups.list()
            for sg in sgs:
                if sg.name == 'default':
                    secgroup_id = sg.id

        # These rules are intended to permit inbound ssh and icmp
        # traffic from all sources, so no group_id is provided.
        # Setting a group_id would only permit traffic from ports
        # belonging to the same security group.
        rulesets = [
            {
                # ssh
                'ip_protocol': 'tcp',
                'from_port': 22,
                'to_port': 22,
                'cidr': '0.0.0.0/0',
            },
            {
                # ping
                'ip_protocol': 'icmp',
                'from_port': -1,
                'to_port': -1,
                'cidr': '0.0.0.0/0',
            }
        ]
        rules = list()
        for ruleset in rulesets:
            sg_rule = client.security_group_rules.create(secgroup_id,
                                                         **ruleset)
            self.set_resource(sg_rule.id, sg_rule)
            rules.append(sg_rule)
        return rules

    def create_server(self, client=None, name=None, image=None, flavor=None,
                      wait=True, create_kwargs={}):
        if client is None:
            client = self.compute_client
        if name is None:
            name = data_utils.rand_name('scenario-server-')
        if image is None:
            image = CONF.compute.image_ref
        if flavor is None:
            flavor = CONF.compute.flavor_ref

        fixed_network_name = CONF.compute.fixed_network_name
        if 'nics' not in create_kwargs and fixed_network_name:
            networks = client.networks.list()
            # If several networks found, set the NetID on which to connect the
            # server to avoid the following error "Multiple possible networks
            # found, use a Network ID to be more specific."
            # See Tempest #1250866
            if len(networks) > 1:
                for network in networks:
                    if network.label == fixed_network_name:
                        create_kwargs['nics'] = [{'net-id': network.id}]
                        break
                # If we didn't find the network we were looking for :
                else:
                    msg = ("The network on which the NIC of the server must "
                           "be connected can not be found : "
                           "fixed_network_name=%s. Starting instance without "
                           "specifying a network.") % fixed_network_name
                    LOG.info(msg)

        LOG.debug("Creating a server (name: %s, image: %s, flavor: %s)",
                  name, image, flavor)
        server = client.servers.create(name, image, flavor, **create_kwargs)
        self.assertEqual(server.name, name)
        self.set_resource(name, server)
        if wait:
            self.status_timeout(client.servers, server.id, 'ACTIVE')
        # The instance retrieved on creation is missing network
        # details, necessitating retrieval after it becomes active to
        # ensure correct details.
        server = client.servers.get(server.id)
        self.set_resource(name, server)
        LOG.debug("Created server: %s", server)
        return server

    def create_volume(self, client=None, size=1, name=None,
                      snapshot_id=None, imageRef=None):
        if client is None:
            client = self.volume_client
        if name is None:
            name = data_utils.rand_name('scenario-volume-')
        LOG.debug("Creating a volume (size: %s, name: %s)", size, name)
        volume = client.volumes.create(size=size, display_name=name,
                                       snapshot_id=snapshot_id,
                                       imageRef=imageRef)
        self.set_resource(name, volume)
        self.assertEqual(name, volume.display_name)
        self.status_timeout(client.volumes, volume.id, 'available')
        LOG.debug("Created volume: %s", volume)
        return volume

    def create_server_snapshot(self, server, compute_client=None,
                               image_client=None, name=None):
        if compute_client is None:
            compute_client = self.compute_client
        if image_client is None:
            image_client = self.image_client
        if name is None:
            name = data_utils.rand_name('scenario-snapshot-')
        LOG.debug("Creating a snapshot image for server: %s", server.name)
        image_id = compute_client.servers.create_image(server, name)
        self.addCleanup(image_client.images.delete, image_id)
        self.status_timeout(image_client.images, image_id, 'active')
        snapshot_image = image_client.images.get(image_id)
        self.assertEqual(name, snapshot_image.name)
        LOG.debug("Created snapshot image %s for server %s",
                  snapshot_image.name, server.name)
        return snapshot_image

    def create_keypair(self, client=None, name=None):
        if client is None:
            client = self.compute_client
        if name is None:
            name = data_utils.rand_name('scenario-keypair-')
        keypair = client.keypairs.create(name)
        self.assertEqual(keypair.name, name)
        self.set_resource(name, keypair)
        return keypair

    def get_remote_client(self, server_or_ip, username=None, private_key=None):
        if isinstance(server_or_ip, six.string_types):
            ip = server_or_ip
        else:
            network_name_for_ssh = CONF.compute.network_for_ssh
            ip = server_or_ip.networks[network_name_for_ssh][0]
        if username is None:
            username = CONF.scenario.ssh_user
        if private_key is None:
            private_key = self.keypair.private_key
        return remote_client.RemoteClient(ip, username, pkey=private_key)

    def _log_console_output(self, servers=None):
        if not servers:
            servers = self.compute_client.servers.list()
        for server in servers:
            LOG.debug('Console output for %s', server.id)
            LOG.debug(server.get_console_output())

    def wait_for_volume_status(self, status):
        volume_id = self.volume.id
        self.status_timeout(
            self.volume_client.volumes, volume_id, status)

    def _image_create(self, name, fmt, path, properties={}):
        name = data_utils.rand_name('%s-' % name)
        image_file = open(path, 'rb')
        self.addCleanup(image_file.close)
        params = {
            'name': name,
            'container_format': fmt,
            'disk_format': fmt,
            'is_public': 'True',
        }
        params.update(properties)
        image = self.image_client.images.create(**params)
        self.addCleanup(self.image_client.images.delete, image)
        self.assertEqual("queued", image.status)
        image.update(data=image_file)
        return image.id

    def glance_image_create(self):
        qcow2_img_path = (CONF.scenario.img_dir + "/" +
                          CONF.scenario.qcow2_img_file)
        aki_img_path = CONF.scenario.img_dir + "/" + CONF.scenario.aki_img_file
        ari_img_path = CONF.scenario.img_dir + "/" + CONF.scenario.ari_img_file
        ami_img_path = CONF.scenario.img_dir + "/" + CONF.scenario.ami_img_file
        LOG.debug("paths: img: %s, ami: %s, ari: %s, aki: %s"
                  % (qcow2_img_path, ami_img_path, ari_img_path, aki_img_path))
        try:
            self.image = self._image_create('scenario-img',
                                            'bare',
                                            qcow2_img_path,
                                            properties={'disk_format':
                                                        'qcow2'})
        except IOError:
            LOG.debug("A qcow2 image was not found. Try to get a uec image.")
            kernel = self._image_create('scenario-aki', 'aki', aki_img_path)
            ramdisk = self._image_create('scenario-ari', 'ari', ari_img_path)
            properties = {
                'properties': {'kernel_id': kernel, 'ramdisk_id': ramdisk}
            }
            self.image = self._image_create('scenario-ami', 'ami',
                                            path=ami_img_path,
                                            properties=properties)
        LOG.debug("image:%s" % self.image)


class BaremetalScenarioTest(OfficialClientTest):
    @classmethod
    def setUpClass(cls):
        super(BaremetalScenarioTest, cls).setUpClass()

        if (not CONF.service_available.ironic or
           not CONF.baremetal.driver_enabled):
            msg = 'Ironic not available or Ironic compute driver not enabled'
            raise cls.skipException(msg)

        # use an admin client manager for baremetal client
        username, password, tenant = cls.admin_credentials()
        manager = clients.OfficialClientManager(username, password, tenant)
        cls.baremetal_client = manager.baremetal_client

        # allow any issues obtaining the node list to raise early
        cls.baremetal_client.node.list()

    def _node_state_timeout(self, node_id, state_attr,
                            target_states, timeout=10, interval=1):
        if not isinstance(target_states, list):
            target_states = [target_states]

        def check_state():
            node = self.get_node(node_id=node_id)
            if getattr(node, state_attr) in target_states:
                return True
            return False

        if not tempest.test.call_until_true(
            check_state, timeout, interval):
            msg = ("Timed out waiting for node %s to reach %s state(s) %s" %
                   (node_id, state_attr, target_states))
            raise exceptions.TimeoutException(msg)

    def wait_provisioning_state(self, node_id, state, timeout):
        self._node_state_timeout(
            node_id=node_id, state_attr='provision_state',
            target_states=state, timeout=timeout)

    def wait_power_state(self, node_id, state):
        self._node_state_timeout(
            node_id=node_id, state_attr='power_state',
            target_states=state, timeout=CONF.baremetal.power_timeout)

    def wait_node(self, instance_id):
        """Waits for a node to be associated with instance_id."""
        def _get_node():
            node = None
            try:
                node = self.get_node(instance_id=instance_id)
            except ironic_exceptions.HTTPNotFound:
                pass
            return node is not None

        if not tempest.test.call_until_true(
            _get_node, CONF.baremetal.association_timeout, 1):
            msg = ('Timed out waiting to get Ironic node by instance id %s'
                   % instance_id)
            raise exceptions.TimeoutException(msg)

    def get_node(self, node_id=None, instance_id=None):
        if node_id:
            return self.baremetal_client.node.get(node_id)
        elif instance_id:
            return self.baremetal_client.node.get_by_instance_uuid(instance_id)

    def get_ports(self, node_id):
        ports = []
        for port in self.baremetal_client.node.list_ports(node_id):
            ports.append(self.baremetal_client.port.get(port.uuid))
        return ports


class NetworkScenarioTest(OfficialClientTest):
    """
    Base class for network scenario tests
    """

    @classmethod
    def check_preconditions(cls):
        if (CONF.service_available.neutron):
            cls.enabled = True
            # verify that neutron_available is telling the truth
            try:
                cls.network_client.list_networks()
            except exc.EndpointNotFound:
                cls.enabled = False
                raise
        else:
            cls.enabled = False
            msg = 'Neutron not available'
            raise cls.skipException(msg)

    @classmethod
    def setUpClass(cls):
        super(NetworkScenarioTest, cls).setUpClass()
        if CONF.compute.allow_tenant_isolation:
            cls.tenant_id = cls.isolated_creds.get_primary_tenant().id
        else:
            cls.tenant_id = cls.manager._get_identity_client(
                CONF.identity.username,
                CONF.identity.password,
                CONF.identity.tenant_name).tenant_id

    def _create_network(self, tenant_id, namestart='network-smoke-'):
        name = data_utils.rand_name(namestart)
        body = dict(
            network=dict(
                name=name,
                tenant_id=tenant_id,
            ),
        )
        result = self.network_client.create_network(body=body)
        network = net_common.DeletableNetwork(client=self.network_client,
                                              **result['network'])
        self.assertEqual(network.name, name)
        self.set_resource(name, network)
        return network

    def _list_networks(self, **kwargs):
        nets = self.network_client.list_networks(**kwargs)
        return nets['networks']

    def _list_subnets(self, **kwargs):
        subnets = self.network_client.list_subnets(**kwargs)
        return subnets['subnets']

    def _list_routers(self, **kwargs):
        routers = self.network_client.list_routers(**kwargs)
        return routers['routers']

    def _list_ports(self, **kwargs):
        ports = self.network_client.list_ports(**kwargs)
        return ports['ports']

    def _get_tenant_own_network_num(self, tenant_id):
        nets = self._list_networks(tenant_id=tenant_id)
        return len(nets)

    def _get_tenant_own_subnet_num(self, tenant_id):
        subnets = self._list_subnets(tenant_id=tenant_id)
        return len(subnets)

    def _get_tenant_own_port_num(self, tenant_id):
        ports = self._list_ports(tenant_id=tenant_id)
        return len(ports)

    def _create_subnet(self, network, namestart='subnet-smoke-', **kwargs):
        """
        Create a subnet for the given network within the cidr block
        configured for tenant networks.
        """

        def cidr_in_use(cidr, tenant_id):
            """
            :return True if subnet with cidr already exist in tenant
                False else
            """
            cidr_in_use = self._list_subnets(tenant_id=tenant_id, cidr=cidr)
            return len(cidr_in_use) != 0

        tenant_cidr = netaddr.IPNetwork(CONF.network.tenant_network_cidr)
        result = None
        # Repeatedly attempt subnet creation with sequential cidr
        # blocks until an unallocated block is found.
        for subnet_cidr in tenant_cidr.subnet(
            CONF.network.tenant_network_mask_bits):
            str_cidr = str(subnet_cidr)
            if cidr_in_use(str_cidr, tenant_id=network.tenant_id):
                continue

            body = dict(
                subnet=dict(
                    name=data_utils.rand_name(namestart),
                    ip_version=4,
                    network_id=network.id,
                    tenant_id=network.tenant_id,
                    cidr=str_cidr,
                ),
            )
            body['subnet'].update(kwargs)
            try:
                result = self.network_client.create_subnet(body=body)
                break
            except exc.NeutronClientException as e:
                is_overlapping_cidr = 'overlaps with another subnet' in str(e)
                if not is_overlapping_cidr:
                    raise
        self.assertIsNotNone(result, 'Unable to allocate tenant network')
        subnet = net_common.DeletableSubnet(client=self.network_client,
                                            **result['subnet'])
        self.assertEqual(subnet.cidr, str_cidr)
        self.set_resource(data_utils.rand_name(namestart), subnet)
        return subnet

    def _create_port(self, network, namestart='port-quotatest-'):
        name = data_utils.rand_name(namestart)
        body = dict(
            port=dict(name=name,
                      network_id=network.id,
                      tenant_id=network.tenant_id))
        result = self.network_client.create_port(body=body)
        self.assertIsNotNone(result, 'Unable to allocate port')
        port = net_common.DeletablePort(client=self.network_client,
                                        **result['port'])
        self.set_resource(name, port)
        return port

    def _get_server_port_id(self, server, ip_addr=None):
        ports = self._list_ports(device_id=server.id, fixed_ip=ip_addr)
        self.assertEqual(len(ports), 1,
                         "Unable to determine which port to target.")
        return ports[0]['id']

    def _create_floating_ip(self, thing, external_network_id, port_id=None):
        if not port_id:
            port_id = self._get_server_port_id(thing)
        body = dict(
            floatingip=dict(
                floating_network_id=external_network_id,
                port_id=port_id,
                tenant_id=thing.tenant_id,
            )
        )
        result = self.network_client.create_floatingip(body=body)
        floating_ip = net_common.DeletableFloatingIp(
            client=self.network_client,
            **result['floatingip'])
        self.set_resource(data_utils.rand_name('floatingip-'), floating_ip)
        return floating_ip

    def _associate_floating_ip(self, floating_ip, server):
        port_id = self._get_server_port_id(server)
        floating_ip.update(port_id=port_id)
        self.assertEqual(port_id, floating_ip.port_id)
        return floating_ip

    def _disassociate_floating_ip(self, floating_ip):
        """
        :param floating_ip: type DeletableFloatingIp
        """
        floating_ip.update(port_id=None)
        self.assertIsNone(floating_ip.port_id)
        return floating_ip

    def _ping_ip_address(self, ip_address, should_succeed=True):
        cmd = ['ping', '-c1', '-w1', ip_address]

        def ping():
            proc = subprocess.Popen(cmd,
                                    stdout=subprocess.PIPE,
                                    stderr=subprocess.PIPE)
            proc.wait()
            return (proc.returncode == 0) == should_succeed

        return tempest.test.call_until_true(
            ping, CONF.compute.ping_timeout, 1)

    def _create_pool(self, lb_method, protocol, subnet_id):
        """Wrapper utility that returns a test pool."""
        name = data_utils.rand_name('pool-')
        body = {
            "pool": {
                "protocol": protocol,
                "name": name,
                "subnet_id": subnet_id,
                "lb_method": lb_method
            }
        }
        resp = self.network_client.create_pool(body=body)
        pool = net_common.DeletablePool(client=self.network_client,
                                        **resp['pool'])
        self.assertEqual(pool['name'], name)
        self.set_resource(name, pool)
        return pool

    def _create_member(self, address, protocol_port, pool_id):
        """Wrapper utility that returns a test member."""
        body = {
            "member": {
                "protocol_port": protocol_port,
                "pool_id": pool_id,
                "address": address
            }
        }
        resp = self.network_client.create_member(body)
        member = net_common.DeletableMember(client=self.network_client,
                                            **resp['member'])
        self.set_resource(data_utils.rand_name('member-'), member)
        return member

    def _create_vip(self, protocol, protocol_port, subnet_id, pool_id):
        """Wrapper utility that returns a test vip."""
        name = data_utils.rand_name('vip-')
        body = {
            "vip": {
                "protocol": protocol,
                "name": name,
                "subnet_id": subnet_id,
                "pool_id": pool_id,
                "protocol_port": protocol_port
            }
        }
        resp = self.network_client.create_vip(body)
        vip = net_common.DeletableVip(client=self.network_client,
                                      **resp['vip'])
        self.assertEqual(vip['name'], name)
        self.set_resource(name, vip)
        return vip

    def _check_vm_connectivity(self, ip_address,
                               username=None,
                               private_key=None,
                               should_connect=True):
        """
        :param ip_address: server to test against
        :param username: server's ssh username
        :param private_key: server's ssh private key to be used
        :param should_connect: True/False indicates positive/negative test
            positive - attempt ping and ssh
            negative - attempt ping and fail if succeed

        :raises: AssertError if the result of the connectivity check does
            not match the value of the should_connect param
        """
        if should_connect:
            msg = "Timed out waiting for %s to become reachable" % ip_address
        else:
            msg = "ip address %s is reachable" % ip_address
        self.assertTrue(self._ping_ip_address(ip_address,
                                              should_succeed=should_connect),
                        msg=msg)
        if should_connect:
            # no need to check ssh for negative connectivity
            linux_client = self.get_remote_client(ip_address, username,
                                                  private_key)
            linux_client.validate_authentication()

    def _check_remote_connectivity(self, source, dest, should_succeed=True):
        """
        check ping server via source ssh connection

        :param source: RemoteClient: an ssh connection from which to ping
        :param dest: and IP to ping against
        :param should_succeed: boolean should ping succeed or not
        :returns: boolean -- should_succeed == ping
        :returns: ping is false if ping failed
        """
        def ping_remote():
            try:
                source.ping_host(dest)
            except exceptions.SSHExecCommandFailed:
                LOG.exception('Failed to ping host via ssh connection')
                return not should_succeed
            return should_succeed

        return tempest.test.call_until_true(ping_remote,
                                            CONF.compute.ping_timeout,
                                            1)

    def _create_security_group_nova(self, client=None,
                                    namestart='secgroup-smoke-',
                                    tenant_id=None):
        if client is None:
            client = self.compute_client
        # Create security group
        sg_name = data_utils.rand_name(namestart)
        sg_desc = sg_name + " description"
        secgroup = client.security_groups.create(sg_name, sg_desc)
        self.assertEqual(secgroup.name, sg_name)
        self.assertEqual(secgroup.description, sg_desc)
        self.set_resource(sg_name, secgroup)

        # Add rules to the security group
        self._create_loginable_secgroup_rule_nova(client, secgroup.id)

        return secgroup

    def _create_security_group_neutron(self, tenant_id, client=None,
                                       namestart='secgroup-smoke-'):
        if client is None:
            client = self.network_client
        secgroup = self._create_empty_security_group(namestart=namestart,
                                                     client=client,
                                                     tenant_id=tenant_id)

        # Add rules to the security group
        rules = self._create_loginable_secgroup_rule_neutron(secgroup=secgroup)
        for rule in rules:
            self.assertEqual(tenant_id, rule.tenant_id)
            self.assertEqual(secgroup.id, rule.security_group_id)
        return secgroup

    def _create_empty_security_group(self, tenant_id, client=None,
                                     namestart='secgroup-smoke-'):
        """Create a security group without rules.

        Default rules will be created:
         - IPv4 egress to any
         - IPv6 egress to any

        :param tenant_id: secgroup will be created in this tenant
        :returns: DeletableSecurityGroup -- containing the secgroup created
        """
        if client is None:
            client = self.network_client
        sg_name = data_utils.rand_name(namestart)
        sg_desc = sg_name + " description"
        sg_dict = dict(name=sg_name,
                       description=sg_desc)
        sg_dict['tenant_id'] = tenant_id
        body = dict(security_group=sg_dict)
        result = client.create_security_group(body=body)
        secgroup = net_common.DeletableSecurityGroup(
            client=client,
            **result['security_group']
        )
        self.assertEqual(secgroup.name, sg_name)
        self.assertEqual(tenant_id, secgroup.tenant_id)
        self.assertEqual(secgroup.description, sg_desc)
        self.set_resource(sg_name, secgroup)
        return secgroup

    def _default_security_group(self, tenant_id, client=None):
        """Get default secgroup for given tenant_id.

        :returns: DeletableSecurityGroup -- default secgroup for given tenant
        """
        if client is None:
            client = self.network_client
        sgs = [
            sg for sg in client.list_security_groups().values()[0]
            if sg['tenant_id'] == tenant_id and sg['name'] == 'default'
        ]
        msg = "No default security group for tenant %s." % (tenant_id)
        self.assertTrue(len(sgs) > 0, msg)
        if len(sgs) > 1:
            msg = "Found %d default security groups" % len(sgs)
            raise exc.NeutronClientNoUniqueMatch(msg=msg)
        return net_common.DeletableSecurityGroup(client=client,
                                                 **sgs[0])

    def _create_security_group_rule(self, client=None, secgroup=None,
                                    tenant_id=None, **kwargs):
        """Create a rule from a dictionary of rule parameters.

        Create a rule in a secgroup. if secgroup not defined will search for
        default secgroup in tenant_id.

        :param secgroup: type DeletableSecurityGroup.
        :param secgroup_id: search for secgroup by id
            default -- choose default secgroup for given tenant_id
        :param tenant_id: if secgroup not passed -- the tenant in which to
            search for default secgroup
        :param kwargs: a dictionary containing rule parameters:
            for example, to allow incoming ssh:
            rule = {
                    direction: 'ingress'
                    protocol:'tcp',
                    port_range_min: 22,
                    port_range_max: 22
                    }
        """
        if client is None:
            client = self.network_client
        if secgroup is None:
            secgroup = self._default_security_group(tenant_id)

        ruleset = dict(security_group_id=secgroup.id,
                       tenant_id=secgroup.tenant_id,
                       )
        ruleset.update(kwargs)

        body = dict(security_group_rule=dict(ruleset))
        sg_rule = client.create_security_group_rule(body=body)
        sg_rule = net_common.DeletableSecurityGroupRule(
            client=client,
            **sg_rule['security_group_rule']
        )
        self.set_resource(sg_rule.id, sg_rule)
        self.assertEqual(secgroup.tenant_id, sg_rule.tenant_id)
        self.assertEqual(secgroup.id, sg_rule.security_group_id)

        return sg_rule

    def _create_loginable_secgroup_rule_neutron(self, client=None,
                                                secgroup=None):
        """These rules are intended to permit inbound ssh and icmp
        traffic from all sources, so no group_id is provided.
        Setting a group_id would only permit traffic from ports
        belonging to the same security group.
        """

        if client is None:
            client = self.network_client
        rules = []
        rulesets = [
            dict(
                # ssh
                protocol='tcp',
                port_range_min=22,
                port_range_max=22,
            ),
            dict(
                # ping
                protocol='icmp',
            )
        ]
        for ruleset in rulesets:
            for r_direction in ['ingress', 'egress']:
                ruleset['direction'] = r_direction
                try:
                    sg_rule = self._create_security_group_rule(
                        client=client, secgroup=secgroup, **ruleset)
                except exc.NeutronClientException as ex:
                    # if rule already exist - skip rule and continue
                    if not (ex.status_code is 409 and 'Security group rule'
                            ' already exists' in ex.message):
                        raise ex
                else:
                    self.assertEqual(r_direction, sg_rule.direction)
                    rules.append(sg_rule)

        return rules

    def _ssh_to_server(self, server, private_key):
        ssh_login = CONF.compute.image_ssh_user
        return self.get_remote_client(server,
                                      username=ssh_login,
                                      private_key=private_key)

    def _show_quota_network(self, tenant_id):
        quota = self.network_client.show_quota(tenant_id)
        return quota['quota']['network']

    def _show_quota_subnet(self, tenant_id):
        quota = self.network_client.show_quota(tenant_id)
        return quota['quota']['subnet']

    def _show_quota_port(self, tenant_id):
        quota = self.network_client.show_quota(tenant_id)
        return quota['quota']['port']

    def _get_router(self, tenant_id):
        """Retrieve a router for the given tenant id.

        If a public router has been configured, it will be returned.

        If a public router has not been configured, but a public
        network has, a tenant router will be created and returned that
        routes traffic to the public network.
        """
        router_id = CONF.network.public_router_id
        network_id = CONF.network.public_network_id
        if router_id:
            result = self.network_client.show_router(router_id)
            return net_common.AttributeDict(**result['router'])
        elif network_id:
            router = self._create_router(tenant_id)
            router.add_gateway(network_id)
            return router
        else:
            raise Exception("Neither of 'public_router_id' or "
                            "'public_network_id' has been defined.")

    def _create_router(self, tenant_id, namestart='router-smoke-'):
        name = data_utils.rand_name(namestart)
        body = dict(
            router=dict(
                name=name,
                admin_state_up=True,
                tenant_id=tenant_id,
            ),
        )
        result = self.network_client.create_router(body=body)
        router = net_common.DeletableRouter(client=self.network_client,
                                            **result['router'])
        self.assertEqual(router.name, name)
        self.set_resource(name, router)
        return router

    def _create_networks(self, tenant_id=None):
        """Create a network with a subnet connected to a router.

        :returns: network, subnet, router
        """
        if tenant_id is None:
            tenant_id = self.tenant_id
        network = self._create_network(tenant_id)
        router = self._get_router(tenant_id)
        subnet = self._create_subnet(network)
        subnet.add_to_router(router.id)
        return network, subnet, router


class OrchestrationScenarioTest(OfficialClientTest):
    """
    Base class for orchestration scenario tests
    """

    @classmethod
    def setUpClass(cls):
        super(OrchestrationScenarioTest, cls).setUpClass()
        if not CONF.service_available.heat:
            raise cls.skipException("Heat support is required")

    @classmethod
    def credentials(cls):
        username = CONF.identity.admin_username
        password = CONF.identity.admin_password
        tenant_name = CONF.identity.tenant_name
        return username, password, tenant_name

    def _load_template(self, base_file, file_name):
        filepath = os.path.join(os.path.dirname(os.path.realpath(base_file)),
                                file_name)
        with open(filepath) as f:
            return f.read()

    @classmethod
    def _stack_rand_name(cls):
        return data_utils.rand_name(cls.__name__ + '-')

    @classmethod
    def _get_default_network(cls):
        networks = cls.network_client.list_networks()
        for net in networks['networks']:
            if net['name'] == CONF.compute.fixed_network_name:
                return net