# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.
""" P1 tests for Snapshots
"""
#Import Local Modules
from nose.plugins.attrib import             attr
from marvin.cloudstackTestCase import       cloudstackTestCase, unittest

from marvin.integration.lib.base import     (Snapshot,
                                             Template,
                                             VirtualMachine,
                                             Account,
                                             ServiceOffering,
                                             DiskOffering,
                                             Volume)

from marvin.integration.lib.common import   (get_domain,
                                             get_zone,
                                             get_template,
                                             list_events,
                                             list_volumes,
                                             list_snapshots,
                                             list_templates,
                                             list_virtual_machines,
                                             get_hypervisor_type)

from marvin.integration.lib.utils import    (cleanup_resources,
                                             format_volume_to_ext3,
                                             random_gen,
                                             is_snapshot_on_nfs)

from marvin.cloudstackAPI import            detachVolume
import time



class Services:
    """Test Snapshots Services
    """

    def __init__(self):
        self.services = {
                        "account": {
                                    "email": "test@test.com",
                                    "firstname": "Test",
                                    "lastname": "User",
                                    "username": "test",
                                    # Random characters are appended for unique
                                    # username
                                    "password": "password",
                         },
                         "service_offering": {
                                    "name": "Tiny Instance",
                                    "displaytext": "Tiny Instance",
                                    "cpunumber": 1,
                                    "cpuspeed": 200,    # in MHz
                                    "memory": 256,      # In MBs
                        },
                        "disk_offering": {
                                    "displaytext": "Small Disk",
                                    "name": "Small Disk",
                                    "disksize": 1
                        },
                        "server_with_disk":
                                    {
                                        "displayname": "Test VM -With Disk",
                                        "username": "root",
                                        "password": "password",
                                        "ssh_port": 22,
                                        "hypervisor": 'XenServer',
                                        "privateport": 22,
                                        "publicport": 22,
                                        "protocol": 'TCP',
                                },

                        "server_without_disk":
                                    {
                                        "displayname": "Test VM-No Disk",
                                        "username": "root",
                                        "password": "password",
                                        "ssh_port": 22,
                                        "hypervisor": 'XenServer',
                                        "privateport": 22,
                                        # For NAT rule creation
                                        "publicport": 22,
                                        "protocol": 'TCP',
                                },
                        "server": {
                                    "displayname": "TestVM",
                                    "username": "root",
                                    "password": "password",
                                    "ssh_port": 22,
                                    "hypervisor": 'XenServer',
                                    "privateport": 22,
                                    "publicport": 22,
                                    "protocol": 'TCP',
                                },
                        "recurring_snapshot": {
                                    "intervaltype": 'HOURLY',
                                    # Frequency of snapshots
                                    "maxsnaps": 1,  # Should be min 2
                                    "schedule": 1,
                                    "timezone": 'US/Arizona',
                                    # Timezone Formats - http://cloud.mindtouch.us/CloudStack_Documentation/Developer's_Guide%3A_CloudStack
                                },
                        "templates": {
                                    "displaytext": 'Template',
                                    "name": 'Template',
                                    "ostype": "CentOS 5.3 (64-bit)",
                                    "templatefilter": 'self',
                                },
                        "volume": {
                                   "diskname": "APP Data Volume",
                                   "size": 1,   # in GBs
                                   "xenserver": {"rootdiskdevice":"/dev/xvda",
                                                 "datadiskdevice_1": '/dev/xvdb',
                                                 "datadiskdevice_2": '/dev/xvdc',   # Data Disk
                                                 },
                                   "kvm":       {"rootdiskdevice": "/dev/vda",
                                                 "datadiskdevice_1": "/dev/vdb",
                                                 "datadiskdevice_2": "/dev/vdc"
                                                 },
                                   "vmware":    {"rootdiskdevice": "/dev/hda",
                                                 "datadiskdevice_1": "/dev/hdb",
                                                 "datadiskdevice_2": "/dev/hdc"
                                                 }
                        },
                        "paths": {
                                    "mount_dir": "/mnt/tmp",
                                    "sub_dir": "test",
                                    "sub_lvl_dir1": "test1",
                                    "sub_lvl_dir2": "test2",
                                    "random_data": "random.data",
                        },
                        "ostype": "CentOS 5.3 (64-bit)",
                        # Cent OS 5.3 (64 bit)
                        "sleep": 60,
                        "timeout": 10,
                    }


class TestSnapshots(cloudstackTestCase):

    @classmethod
    def setUpClass(cls):
        cls.api_client = super(TestSnapshots, cls).getClsTestClient().getApiClient()
        cls.services = Services().services
        # Get Zone, Domain and templates
        cls.domain = get_domain(cls.api_client, cls.services)
        cls.zone = get_zone(cls.api_client, cls.services)
        cls.services['mode'] = cls.zone.networktype
        cls.disk_offering = DiskOffering.create(
                                    cls.api_client,
                                    cls.services["disk_offering"]
                                    )
        cls.template = get_template(
                            cls.api_client,
                            cls.zone.id,
                            cls.services["ostype"]
                            )

        cls.services["domainid"] = cls.domain.id
        cls.services["volume"]["zoneid"] = cls.services["server_with_disk"]["zoneid"] = cls.zone.id
        cls.services["server_with_disk"]["diskoffering"] = cls.disk_offering.id

        cls.services["server_without_disk"]["zoneid"] = cls.zone.id

        cls.services["templates"]["ostypeid"] = cls.template.ostypeid
        cls.services["zoneid"] = cls.zone.id
        cls.services["diskoffering"] = cls.disk_offering.id

        # Create VMs, NAT Rules etc
        cls.account = Account.create(
                            cls.api_client,
                            cls.services["account"],
                            domainid=cls.domain.id
                            )

        cls.services["account"] = cls.account.name

        cls.service_offering = ServiceOffering.create(
                                            cls.api_client,
                                            cls.services["service_offering"]
                                            )
        cls.virtual_machine = cls.virtual_machine_with_disk = \
                    VirtualMachine.create(
                                cls.api_client,
                                cls.services["server_with_disk"],
                                templateid=cls.template.id,
                                accountid=cls.account.name,
                                domainid=cls.account.domainid,
                                serviceofferingid=cls.service_offering.id,
                                mode=cls.services["mode"]
                                )

        # Get Hypervisor Type
        cls.hypervisor = (get_hypervisor_type(cls.api_client)).lower()

        cls._cleanup = [
                        cls.service_offering,
                        cls.disk_offering,
                        cls.account,
                        ]
        return

    @classmethod
    def tearDownClass(cls):
        try:
            #Cleanup resources used
            cleanup_resources(cls.api_client, cls._cleanup)
        except Exception as e:
            raise Exception("Warning: Exception during cleanup : %s" % e)
        return

    def setUp(self):
        self.apiclient = self.testClient.getApiClient()
        self.dbclient = self.testClient.getDbConnection()
        self.cleanup = []
        return

    def tearDown(self):
        try:
            #Clean up, terminate the created instance, volumes and snapshots
            cleanup_resources(self.apiclient, self.cleanup)
        except Exception as e:
            raise Exception("Warning: Exception during cleanup : %s" % e)
        return

    @attr(speed = "slow")
    @attr(tags = ["advanced", "advancedns", "smoke"])
    def test_02_snapshot_data_disk(self):
        """Test Snapshot Data Disk
        """

        volume = list_volumes(
                            self.apiclient,
                            virtualmachineid=self.virtual_machine_with_disk.id,
                            type='DATADISK',
                            listall=True
                            )
        self.assertEqual(
                            isinstance(volume, list),
                            True,
                            "Check list response returns a valid list"
                        )

        self.debug("Creating a Snapshot from data volume: %s" % volume[0].id)
        snapshot = Snapshot.create(
                                   self.apiclient,
                                   volume[0].id,
                                   account=self.account.name,
                                   domainid=self.account.domainid
                                   )
        snapshots = list_snapshots(
                                  self.apiclient,
                                  id=snapshot.id
                                  )
        self.assertEqual(
                            isinstance(snapshots, list),
                            True,
                            "Check list response returns a valid list"
                        )
        self.assertNotEqual(
                            snapshots,
                            None,
                            "Check if result exists in list item call"
                            )
        self.assertEqual(
                            snapshots[0].id,
                            snapshot.id,
                            "Check resource id in list resources call"
                        )
        self.assertTrue(is_snapshot_on_nfs(self.apiclient, self.dbclient, self.config, self.zone.id, snapshot.id))
        return

    @attr(speed = "slow")
    @attr(tags = ["advanced", "advancedns", "basic", "sg"])
    def test_01_volume_from_snapshot(self):
        """Test Creating snapshot from volume having spaces in name(KVM)
        """
        # Validate the following
        #1. Create a virtual machine and data volume
        #2. Attach data volume to VM
        #3. Login to machine; create temp/test directories on data volume and write some random data
        #4. Snapshot the Volume
        #5. Create another Volume from snapshot
        #6. Mount/Attach volume to another virtual machine
        #7. Compare data, data should match

        random_data_0 = random_gen(size=100)
        random_data_1 = random_gen(size=100)

        self.debug("random_data_0 : %s" % random_data_0)
        self.debug("random_data_1: %s" % random_data_1)

        try:
            ssh_client = self.virtual_machine.get_ssh_client()
        except Exception as e:
            self.fail("SSH failed for VM: %s" %
                      self.virtual_machine.ipaddress)

        volume = Volume.create(
                               self.apiclient,
                               self.services["volume"],
                               zoneid=self.zone.id,
                               account=self.account.name,
                               domainid=self.account.domainid,
                               diskofferingid=self.disk_offering.id
                               )
        self.debug("Created volume with ID: %s" % volume.id)
        self.virtual_machine.attach_volume(
                                           self.apiclient,
                                           volume
                                           )
        self.debug("Attach volume: %s to VM: %s" %
                                (volume.id, self.virtual_machine.id))


        self.debug("Formatting volume: %s to ext3" % volume.id)
        #Format partition using ext3
        # Note that this is the second data disk partition of virtual machine as it was already containing
        # data disk before attaching the new volume, Hence datadiskdevice_2
        format_volume_to_ext3(
                              ssh_client,
                              self.services["volume"][self.hypervisor]["datadiskdevice_2"]
                              )
        cmds = [    "fdisk -l",
                    "mkdir -p %s" % self.services["paths"]["mount_dir"],
                    "mount -t ext3 %s1 %s" % (
                                      self.services["volume"][self.hypervisor]["datadiskdevice_2"],
                                      self.services["paths"]["mount_dir"]
                                      ),
                    "mkdir -p %s/%s/{%s,%s} " % (
                                    self.services["paths"]["mount_dir"],
                                    self.services["paths"]["sub_dir"],
                                    self.services["paths"]["sub_lvl_dir1"],
                                    self.services["paths"]["sub_lvl_dir2"]
                                    ),
                    "echo %s > %s/%s/%s/%s" % (
                                    random_data_0,
                                    self.services["paths"]["mount_dir"],
                                    self.services["paths"]["sub_dir"],
                                    self.services["paths"]["sub_lvl_dir1"],
                                    self.services["paths"]["random_data"]
                                    ),
                    "echo %s > %s/%s/%s/%s" % (
                                    random_data_1,
                                    self.services["paths"]["mount_dir"],
                                    self.services["paths"]["sub_dir"],
                                    self.services["paths"]["sub_lvl_dir2"],
                                    self.services["paths"]["random_data"]
                                    ),
                    "cat %s/%s/%s/%s" % (
                                    self.services["paths"]["mount_dir"],
                                    self.services["paths"]["sub_dir"],
                                    self.services["paths"]["sub_lvl_dir1"],
                                    self.services["paths"]["random_data"]
                                    )
                ]
        for c in cmds:
            self.debug("Command: %s" % c)
            result = ssh_client.execute(c)
            self.debug(result)

        # Unmount the Sec Storage
        cmds = [
                    "umount %s" % (self.services["paths"]["mount_dir"]),
                ]
        for c in cmds:
            self.debug("Command: %s" % c)
            ssh_client.execute(c)

        list_volume_response = Volume.list(
                                    self.apiclient,
                                    virtualmachineid=self.virtual_machine.id,
                                    type='DATADISK',
                                    id=volume.id
                                    )

        self.assertEqual(
                         isinstance(list_volume_response, list),
                         True,
                         "Check list volume response for valid data"
                         )
        volume_response = list_volume_response[0]
        #Create snapshot from attached volume
        snapshot = Snapshot.create(
                                   self.apiclient,
                                   volume_response.id,
                                   account=self.account.name,
                                   domainid=self.account.domainid
                                   )
        self.debug("Created snapshot: %s" % snapshot.id)
        #Create volume from snapshot
        volume_from_snapshot = Volume.create_from_snapshot(
                                        self.apiclient,
                                        snapshot.id,
                                        self.services["volume"],
                                        account=self.account.name,
                                        domainid=self.account.domainid
                                        )

        # Detach the volume from virtual machine
        self.virtual_machine.detach_volume(
                                           self.apiclient,
                                           volume
                                           )
        self.debug("Detached volume: %s from VM: %s" %
                                (volume.id, self.virtual_machine.id))

        self.debug("Created Volume: %s from Snapshot: %s" % (
                                            volume_from_snapshot.id,
                                            snapshot.id))
        volumes = Volume.list(
                                self.apiclient,
                                id=volume_from_snapshot.id
                                )
        self.assertEqual(
                            isinstance(volumes, list),
                            True,
                            "Check list response returns a valid list"
                        )

        self.assertNotEqual(
                            len(volumes),
                            None,
                            "Check Volume list Length"
                      )
        self.assertEqual(
                        volumes[0].id,
                        volume_from_snapshot.id,
                        "Check Volume in the List Volumes"
                    )
        #Attaching volume to new VM
        new_virtual_machine = VirtualMachine.create(
                                    self.apiclient,
                                    self.services["server_without_disk"],
                                    templateid=self.template.id,
                                    accountid=self.account.name,
                                    domainid=self.account.domainid,
                                    serviceofferingid=self.service_offering.id,
                                    mode=self.services["mode"]
                                )
        self.debug("Deployed new VM for account: %s" % self.account.name)
        #self.cleanup.append(new_virtual_machine)

        self.debug("Attaching volume: %s to VM: %s" % (
                                            volume_from_snapshot.id,
                                            new_virtual_machine.id
                                            ))

        new_virtual_machine.attach_volume(
                                           self.apiclient,
                                           volume_from_snapshot
                                           )

        # Rebooting is required so that newly attached disks are detected
        self.debug("Rebooting : %s" % new_virtual_machine.id)

        new_virtual_machine.reboot(self.apiclient)

        try:
            #Login to VM to verify test directories and files
            ssh = new_virtual_machine.get_ssh_client()

            # Mount datadiskdevice_1 because this is the first data disk of the new virtual machine
            cmds = ["fdisk -l",
                    "mkdir -p %s" % self.services["paths"]["mount_dir"],
                    "mount -t ext3 %s1 %s" % (
                                      self.services["volume"][self.hypervisor]["datadiskdevice_1"],
                                      self.services["paths"]["mount_dir"]
                                      ),
               ]

            for c in cmds:
                self.debug("Command: %s" % c)
                result = ssh.execute(c)
                self.debug(result)

            returned_data_0 = ssh.execute(
                            "cat %s/%s/%s/%s" % (
                                    self.services["paths"]["mount_dir"],
                                    self.services["paths"]["sub_dir"],
                                    self.services["paths"]["sub_lvl_dir1"],
                                    self.services["paths"]["random_data"]
                            ))
            returned_data_1 = ssh.execute(
                            "cat %s/%s/%s/%s" % (
                                    self.services["paths"]["mount_dir"],
                                    self.services["paths"]["sub_dir"],
                                    self.services["paths"]["sub_lvl_dir2"],
                                    self.services["paths"]["random_data"]
                            ))
        except Exception as e:
            self.fail("SSH access failed for VM: %s, Exception: %s" %
                                (new_virtual_machine.ipaddress, e))

        self.debug("returned_data_0: %s" % returned_data_0[0])
        self.debug("returned_data_1: %s" % returned_data_1[0])

        #Verify returned data
        self.assertEqual(
                random_data_0,
                returned_data_0[0],
                "Verify newly attached volume contents with existing one"
                )
        self.assertEqual(
                random_data_1,
                returned_data_1[0],
                "Verify newly attached volume contents with existing one"
                )
        # Unmount the Sec Storage
        cmds = [
                    "umount %s" % (self.services["paths"]["mount_dir"]),
                ]
        for c in cmds:
            self.debug("Command: %s" % c)
            ssh_client.execute(c)
        return

    @attr(speed = "slow")
    @attr(tags = ["advanced", "advancedns", "smoke"])
    def test_04_delete_snapshot(self):
        """Test Delete Snapshot
        """

        #1. Snapshot the Volume
        #2. Delete the snapshot
        #3. Verify snapshot is removed by calling List Snapshots API
        #4. Verify snapshot was removed from image store

        self.debug("Creating volume under account: %s" % self.account.name)
        volume = Volume.create(
                               self.apiclient,
                               self.services["volume"],
                               zoneid=self.zone.id,
                               account=self.account.name,
                               domainid=self.account.domainid,
                               diskofferingid=self.disk_offering.id
                               )
        self.debug("Created volume: %s" % volume.id)
        self.debug("Attaching volume to vm: %s" % self.virtual_machine.id)

        self.virtual_machine.attach_volume(
                                           self.apiclient,
                                           volume
                                           )
        self.debug("Volume attached to vm")

        volumes = list_volumes(
                               self.apiclient,
                               virtualmachineid=self.virtual_machine.id,
                               type='DATADISK',
                               id=volume.id
                               )
        self.assertEqual(
                            isinstance(volumes, list),
                            True,
                            "Check list response returns a valid list"
                        )
        snapshot = Snapshot.create(
                                   self.apiclient,
                                   volumes[0].id,
                                   account=self.account.name,
                                   domainid=self.account.domainid
                                   )
        snapshot.delete(self.apiclient)
        snapshots = list_snapshots(
                                   self.apiclient,
                                   id=snapshot.id
                                   )
        self.assertEqual(
                         snapshots,
                         None,
                         "Check if result exists in list item call"
                         )
        self.assertFalse(is_snapshot_on_nfs(self.apiclient, self.dbclient, self.config, self.zone.id, snapshot.id))
        return

    @attr(speed = "slow")
    @attr(tags = ["advanced", "advancedns", "basic", "sg"])
    def test_03_snapshot_detachedDisk(self):
        """Test snapshot from detached disk
        """
        # Validate the following
        # 1. login in VM  and write some data on data disk(use fdisk to
        #    partition datadisk,fdisk, and make filesystem using
        #    mkfs.ext3)
        # 2. Detach the data disk and write some data on data disk
        # 3. perform the snapshot on the detached volume
        # 4. listvolumes with VM id shouldn't show the detached volume
        # 5. listSnapshots should list the snapshot that was created
        # 6. verify backup_snap_id was non null in the `snapshots` table

        volumes = list_volumes(
                               self.apiclient,
                               virtualmachineid=self.virtual_machine.id,
                               type='DATADISK',
                               listall=True
                               )
        self.assertEqual(
                            isinstance(volumes, list),
                            True,
                            "Check list response returns a valid list"
                        )
        volume = volumes[0]
        random_data_0 = random_gen(size=100)
        random_data_1 = random_gen(size=100)
        try:
            ssh_client = self.virtual_machine.get_ssh_client()

            #Format partition using ext3
            format_volume_to_ext3(
                              ssh_client,
                              self.services["volume"][self.hypervisor]["datadiskdevice_1"]
                              )
            cmds = [
                    "mkdir -p %s" % self.services["paths"]["mount_dir"],
                    "mount %s1 %s" % (
                                      self.services["volume"][self.hypervisor]["datadiskdevice_1"],
                                      self.services["paths"]["mount_dir"]
                                      ),
                    "pushd %s" % self.services["paths"]["mount_dir"],
                    "mkdir -p %s/{%s,%s} " % (
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir1"],
                                                self.services["paths"]["sub_lvl_dir2"]
                                            ),
                    "echo %s > %s/%s/%s" % (
                                               random_data_0,
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir1"],
                                                self.services["paths"]["random_data"]
                                            ),
                    "echo %s > %s/%s/%s" % (
                                                random_data_1,
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir2"],
                                                self.services["paths"]["random_data"]
                                            ),
                    "sync",
                    "umount %s" % (self.services["paths"]["mount_dir"]),
                ]
            for c in cmds:
                self.debug(ssh_client.execute(c))

            #detach volume from VM
            cmd = detachVolume.detachVolumeCmd()
            cmd.id = volume.id
            self.apiclient.detachVolume(cmd)

            #Create snapshot from detached volume
            snapshot = Snapshot.create(self.apiclient, volume.id)
            self.cleanup.append(snapshot)

            volumes = list_volumes(
                               self.apiclient,
                               virtualmachineid=self.virtual_machine.id,
                               type='DATADISK',
                               listall=True
                               )

            self.assertEqual(
                            volumes,
                            None,
                            "Check Volume is detached"
                      )

            # Verify the snapshot was created or not
            snapshots = list_snapshots(
                                   self.apiclient,
                                   id=snapshot.id
                                   )
            self.assertNotEqual(
                            snapshots,
                            None,
                            "Check if result exists in list snapshots call"
                            )
            self.assertEqual(
                            snapshots[0].id,
                            snapshot.id,
                            "Check snapshot id in list resources call"
                        )
        except Exception as e:
            self.fail("SSH failed for VM with IP: %s - %s" %
                                (self.virtual_machine.ssh_ip, e))

        qresultset = self.dbclient.execute(
                        "select id from snapshots where uuid = '%s';" \
                        % snapshot.id
                        )
        self.assertNotEqual(
                            len(qresultset),
                            0,
                            "Check DB Query result set"
                            )

        qresult = qresultset[0]
        self.assertNotEqual(
                            str(qresult[0]),
                            'NULL',
                            "Check if backup_snap_id is not null"
                        )
        return

    @attr(speed = "slow")
    @attr(tags = ["advanced", "advancedns", "smoke", "xen"])
    def test_07_template_from_snapshot(self):
        """Create Template from snapshot
        """

        #1. Login to machine; create temp/test directories on data volume
        #2. Snapshot the Volume
        #3. Create Template from snapshot
        #4. Deploy Virtual machine using this template
        #5. Login to newly created virtual machine
        #6. Compare data in the root disk with the one that was written on the volume, it should match

        random_data_0 = random_gen(size=100)
        random_data_1 = random_gen(size=100)

        try:
            #Login to virtual machine
            ssh_client = self.virtual_machine.get_ssh_client()

            cmds = [
                    "mkdir -p %s" % self.services["paths"]["mount_dir"],
                    "mount %s1 %s" % (
                                      self.services["volume"][self.hypervisor]["rootdiskdevice"],
                                      self.services["paths"]["mount_dir"]
                                      ),
                    "mkdir -p %s/%s/{%s,%s} " % (
                                                self.services["paths"]["mount_dir"],
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir1"],
                                                self.services["paths"]["sub_lvl_dir2"]
                                            ),
                    "echo %s > %s/%s/%s/%s" % (
                                                random_data_0,
                                                self.services["paths"]["mount_dir"],
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir1"],
                                                self.services["paths"]["random_data"]
                                            ),
                    "echo %s > %s/%s/%s/%s" % (
                                                random_data_1,
                                                self.services["paths"]["mount_dir"],
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir2"],
                                                self.services["paths"]["random_data"]
                                        ),
		             "sync",
                ]

            for c in cmds:
                self.debug(c)
                result = ssh_client.execute(c)
                self.debug(result)

        except Exception as e:
            self.fail("SSH failed for VM with IP address: %s" %
                                    self.virtual_machine.ipaddress)

        # Unmount the Volume
        cmds = [
                    "umount %s" % (self.services["paths"]["mount_dir"]),
                ]
        for c in cmds:
            self.debug(c)
            ssh_client.execute(c)

        volumes = list_volumes(
                        self.apiclient,
                        virtualmachineid=self.virtual_machine.id,
                        type='ROOT',
                        listall=True
                        )
        self.assertEqual(
                            isinstance(volumes, list),
                            True,
                            "Check list response returns a valid list"
                        )

        volume = volumes[0]

        #Create a snapshot of volume
        snapshot = Snapshot.create(
                                   self.apiclient,
                                   volume.id,
                                   account=self.account.name,
                                   domainid=self.account.domainid
                                   )

        self.debug("Snapshot created from volume ID: %s" % volume.id)
        # Generate template from the snapshot
        template = Template.create_from_snapshot(
                                    self.apiclient,
                                    snapshot,
                                    self.services["templates"]
                                    )
        self.cleanup.append(template)
        self.debug("Template created from snapshot ID: %s" % snapshot.id)

        # Verify created template
        templates = list_templates(
                                self.apiclient,
                                templatefilter=\
                                self.services["templates"]["templatefilter"],
                                id=template.id
                                )
        self.assertNotEqual(
                            templates,
                            None,
                            "Check if result exists in list item call"
                            )

        self.assertEqual(
                            templates[0].id,
                            template.id,
                            "Check new template id in list resources call"
                        )
        self.debug("Deploying new VM from template: %s" % template.id)

        # Deploy new virtual machine using template
        new_virtual_machine = VirtualMachine.create(
                                    self.apiclient,
                                    self.services["server_without_disk"],
                                    templateid=template.id,
                                    accountid=self.account.name,
                                    domainid=self.account.domainid,
                                    serviceofferingid=self.service_offering.id,
                                    mode=self.services["mode"]
                                    )
        self.cleanup.append(new_virtual_machine)

        try:
            #Login to VM & mount directory
            ssh = new_virtual_machine.get_ssh_client()

            cmds = [
                    "mkdir -p %s" % self.services["paths"]["mount_dir"],
                    "mount %s1 %s" % (
                                      self.services["volume"][self.hypervisor]["rootdiskdevice"],
                                      self.services["paths"]["mount_dir"]
                                      )
               ]

            for c in cmds:
                ssh.execute(c)

            returned_data_0 = ssh.execute("cat %s/%s/%s/%s" % (
                                                self.services["paths"]["mount_dir"],
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir1"],
                                                self.services["paths"]["random_data"]
                                    ))
            self.debug(returned_data_0)
            returned_data_1 = ssh.execute("cat %s/%s/%s/%s" % (
                                                self.services["paths"]["mount_dir"],
                                                self.services["paths"]["sub_dir"],
                                                self.services["paths"]["sub_lvl_dir2"],
                                                self.services["paths"]["random_data"]
                                    ))
            self.debug(returned_data_1)
        except Exception as e:
            self.fail("SSH failed for VM with IP address: %s" %
                                    new_virtual_machine.ipaddress)
        #Verify returned data
        self.assertEqual(
                random_data_0,
                returned_data_0[0],
                "Verify newly attached volume contents with existing one"
                )
        self.assertEqual(
                random_data_1,
                returned_data_1[0],
                "Verify newly attached volume contents with existing one"
                )
        # Unmount the volume
        cmds = [
                    "umount %s" % (self.services["paths"]["mount_dir"]),
                ]
        try:
            for c in cmds:
                self.debug(c)
                ssh_client.execute(c)

        except Exception as e:
            self.fail("SSH failed for VM with IP address: %s, Exception: %s" %
                                    (new_virtual_machine.ipaddress, e))
        return


class TestCreateVMSnapshotTemplate(cloudstackTestCase):

    @classmethod
    def setUpClass(cls):
        cls.api_client = super(TestCreateVMSnapshotTemplate, cls).getClsTestClient().getApiClient()
        cls.services = Services().services
        # Get Zone, Domain and templates
        cls.domain = get_domain(cls.api_client, cls.services)
        cls.zone = get_zone(cls.api_client, cls.services)
        cls.services['mode'] = cls.zone.networktype

        cls.template = get_template(
                            cls.api_client,
                            cls.zone.id,
                            cls.services["ostype"]
                            )
        cls.services["domainid"] = cls.domain.id
        cls.services["server"]["zoneid"] = cls.zone.id


        # Create VMs, NAT Rules etc
        cls.account = Account.create(
                            cls.api_client,
                            cls.services["account"],
                            domainid=cls.domain.id
                            )

        cls.services["account"] = cls.account.name

        cls.service_offering = ServiceOffering.create(
                                            cls.api_client,
                                            cls.services["service_offering"]
                                            )
        cls._cleanup = [
                        cls.service_offering,
                        cls.account,
                        ]
        return

    @classmethod
    def tearDownClass(cls):
        try:
            #Cleanup resources used
            cleanup_resources(cls.api_client, cls._cleanup)
        except Exception as e:
            raise Exception("Warning: Exception during cleanup : %s" % e)
        return

    def setUp(self):
        self.apiclient = self.testClient.getApiClient()
        self.dbclient = self.testClient.getDbConnection()
        self.cleanup = []
        return

    def tearDown(self):
        try:
            #Clean up, terminate the created instance, volumes and snapshots
            cleanup_resources(self.apiclient, self.cleanup)
        except Exception as e:
            raise Exception("Warning: Exception during cleanup : %s" % e)
        return

    @attr(speed = "slow")
    @attr(tags = ["advanced", "advancedns"])
    def test_01_createVM_snapshotTemplate(self):
        """Test create VM, Snapshot and Template
        """
        # Validate the following
        # 1. Deploy VM using default template, small service offering
        #    and small data disk offering.
        # 2. Perform snapshot on the root disk of this VM.
        # 3. Create a template from snapshot.
        # 4. Create a instance from above created template.
        # 5. listSnapshots should list the snapshot that was created.
        # 6. verify that secondary storage NFS share contains the reqd
        #  volume under /secondary/snapshots/$accountid/$volumeid/$snapshot_uuid
        # 7. verify backup_snap_id was non null in the `snapshots` table
        # 8. listTemplates() should return the newly created Template,
        #    and check for template state as READY"
        # 9. listVirtualMachines() command should return the deployed VM.
        #    State of this VM should be Running.

        #Create Virtual Machine
        self.virtual_machine = VirtualMachine.create(
                                self.apiclient,
                                self.services["server"],
                                templateid=self.template.id,
                                accountid=self.account.name,
                                domainid=self.account.domainid,
                                serviceofferingid=self.service_offering.id
                                )
        self.debug("Created VM with ID: %s" % self.virtual_machine.id)
        # Get the Root disk of VM
        volumes = list_volumes(
                            self.apiclient,
                            virtualmachineid=self.virtual_machine.id,
                            type='ROOT',
                            listall=True
                            )
        volume = volumes[0]

        # Create a snapshot from the ROOTDISK
        snapshot = Snapshot.create(self.apiclient, volume.id)
        self.debug("Snapshot created: ID - %s" % snapshot.id)
        self.cleanup.append(snapshot)

        snapshots = list_snapshots(
                                   self.apiclient,
                                   id=snapshot.id
                                   )
        self.assertEqual(
                            isinstance(snapshots, list),
                            True,
                            "Check list response returns a valid list"
                        )
        self.assertNotEqual(
                            snapshots,
                            None,
                            "Check if result exists in list snapshots call"
                            )
        self.assertEqual(
                            snapshots[0].id,
                            snapshot.id,
                            "Check snapshot id in list resources call"
                        )
        self.debug("select backup_snap_id, account_id, volume_id from snapshots where uuid = '%s';" \
                        % snapshot.id)
        snapshot_uuid = snapshot.id

        # Generate template from the snapshot
        template = Template.create_from_snapshot(
                                    self.apiclient,
                                    snapshot,
                                    self.services["templates"]
                                    )
        self.debug("Created template from snapshot: %s" % template.id)
        self.cleanup.append(template)

        templates = list_templates(
                                self.apiclient,
                                templatefilter=\
                                self.services["templates"]["templatefilter"],
                                id=template.id
                                )

        self.assertNotEqual(
                            templates,
                            None,
                            "Check if result exists in list item call"
                            )

        self.assertEqual(
                            templates[0].isready,
                            True,
                            "Check new template state in list templates call"
                        )

        # Deploy new virtual machine using template
        new_virtual_machine = VirtualMachine.create(
                                    self.apiclient,
                                    self.services["server"],
                                    templateid=template.id,
                                    accountid=self.account.name,
                                    domainid=self.account.domainid,
                                    serviceofferingid=self.service_offering.id
                                    )
        self.debug("Created VM with ID: %s from template: %s" % (
                                                        new_virtual_machine.id,
                                                        template.id
                                                        ))
        self.cleanup.append(new_virtual_machine)

        # Newly deployed VM should be 'Running'
        virtual_machines = list_virtual_machines(
                                self.apiclient,
                                id=new_virtual_machine.id,
                                account=self.account.name,
                                domainid=self.account.domainid
                                )
        self.assertEqual(
                            isinstance(virtual_machines, list),
                            True,
                            "Check list response returns a valid list"
                        )
        self.assertNotEqual(
                             len(virtual_machines),
                             0,
                             "Check list virtual machines response"
                             )
        for virtual_machine in virtual_machines:
            self.assertEqual(
                        virtual_machine.state,
                        'Running',
                        "Check list VM response for Running state"
                    )
        self.assertTrue(is_snapshot_on_nfs(self.apiclient, self.dbclient, self.config, self.zone.id, snapshot_uuid))
        return

class TestSnapshotEvents(cloudstackTestCase):

    @classmethod
    def setUpClass(cls):
        cls.api_client = super(TestSnapshotEvents, cls).getClsTestClient().getApiClient()
        cls.services = Services().services
        # Get Zone, Domain and templates
        cls.domain = get_domain(cls.api_client, cls.services)
        cls.zone = get_zone(cls.api_client, cls.services)
        cls.services['mode'] = cls.zone.networktype

        template = get_template(
                            cls.api_client,
                            cls.zone.id,
                            cls.services["ostype"]
                            )
        cls.services["server"]["zoneid"] = cls.zone.id

        cls.services["template"] = template.id

        # Create VMs, NAT Rules etc
        cls.account = Account.create(
                            cls.api_client,
                            cls.services["account"],
                            domainid=cls.domain.id
                            )

        cls.services["account"] = cls.account.name

        cls.service_offering = ServiceOffering.create(
                                            cls.api_client,
                                            cls.services["service_offering"]
                                            )
        cls.virtual_machine = VirtualMachine.create(
                                cls.api_client,
                                cls.services["server"],
                                templateid=template.id,
                                accountid=cls.account.name,
                                domainid=cls.account.domainid,
                                serviceofferingid=cls.service_offering.id
                                )

        cls._cleanup = [
                        cls.service_offering,
                        cls.account,
                        ]
        return

    @classmethod
    def tearDownClass(cls):
        try:
            #Cleanup resources used
            cleanup_resources(cls.api_client, cls._cleanup)
        except Exception as e:
            raise Exception("Warning: Exception during cleanup : %s" % e)
        return

    def setUp(self):
        self.apiclient = self.testClient.getApiClient()
        self.dbclient = self.testClient.getDbConnection()
        self.cleanup = []
        return

    def tearDown(self):
        try:
            #Clean up, terminate the created instance, volumes and snapshots
            cleanup_resources(self.apiclient, self.cleanup)
        except Exception as e:
            raise Exception("Warning: Exception during cleanup : %s" % e)
        return

    @attr(speed = "slow")
    @attr(tags = ["advanced", "advancedns"])
    def test_05_snapshot_events(self):
        """Test snapshot events
        """
        # Validate the following
        # 1. Perform snapshot on the root disk of this VM and check the events/alerts.
        # 2. delete the snapshots and check the events/alerts
        # 3. listEvents() shows created/deleted snapshot events

        # Get the Root disk of VM
        volumes = list_volumes(
                            self.apiclient,
                            virtualmachineid=self.virtual_machine.id,
                            type='ROOT',
                            listall=True
                            )
        self.assertEqual(
                            isinstance(volumes, list),
                            True,
                            "Check list response returns a valid list"
                        )
        volume = volumes[0]

        # Create a snapshot from the ROOTDISK
        snapshot = Snapshot.create(self.apiclient, volume.id)
        self.debug("Snapshot created with ID: %s" % snapshot.id)

        snapshots = list_snapshots(
                                   self.apiclient,
                                   id=snapshot.id
                                   )
        self.assertEqual(
                            isinstance(snapshots, list),
                            True,
                            "Check list response returns a valid list"
                        )
        self.assertNotEqual(
                            snapshots,
                            None,
                            "Check if result exists in list snapshots call"
                            )
        self.assertEqual(
                            snapshots[0].id,
                            snapshot.id,
                            "Check snapshot id in list resources call"
                        )
        snapshot.delete(self.apiclient)

        # Sleep to ensure that snapshot is deleted properly
        time.sleep(self.services["sleep"])
        events = list_events(
                             self.apiclient,
                             account=self.account.name,
                             domainid=self.account.domainid,
                             type='SNAPSHOT.DELETE'
                             )
        self.assertEqual(
                            isinstance(events, list),
                            True,
                            "Check list response returns a valid list"
                        )
        self.assertNotEqual(
                            events,
                            None,
                            "Check if event exists in list events call"
                            )
        self.assertIn(
                            events[0].state,
                            ['Completed', 'Scheduled'],
                            "Check events state in list events call"
                        )
        return
