Call hpa driver

Issue-ID: MULTICLOUD-694
Signed-off-by: Haibin Huang <haibin.huang@intel.com>
Change-Id: Ifb585a5446e3337522cbd0f947076d9f8a9d4451

1 files changed, 1141 insertions, 0 deletions

diff --git a/share/newton_base/registration/registration_driver.py b/share/newton_base/registration/registration_driver.py
new file mode 100644
index 00000000..26954273
--- /dev/null
+++ b/share/newton_base/registration/registration_driver.py
@@ -0,0 +1,1141 @@
+# Copyright (c) 2020 Intel Inc.
+#
+# 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 json
+import uuid
+import traceback
+
+from keystoneauth1.exceptions import HttpError
+from rest_framework import status
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from common.exceptions import VimDriverNewtonException
+from common.msapi import extsys
+from common.msapi.helper import MultiCloudThreadHelper
+from common.msapi.helper import MultiCloudAAIHelper
+from common.utils import restcall
+from newton_base.util import VimDriverUtils
+from django.conf import settings
+from hpa import hpa_discovery
+
+logger = logging.getLogger(__name__)
+
+
+class Registry(APIView):
+
+    def __init__(self):
+        # logger.debug("Registry __init__: %s" % traceback.format_exc())
+        if not hasattr(self, "_logger"):
+            self._logger = logger
+
+        if not hasattr(self, "register_thread"):
+            # dedicate thread to offload vim registration process
+            self.register_thread = MultiCloudThreadHelper("vimupdater")
+
+        if not hasattr(self, "register_helper") or not self.register_helper:
+            if not hasattr(self, "proxy_prefix"):
+                self.proxy_prefix = "multicloud"
+            if not hasattr(self, "AAI_BASE_URL"):
+                self.AAI_BASE_URL = "127.0.0.1"
+            self.register_helper = RegistryHelper(
+                self.proxy_prefix or "multicloud",
+                self.AAI_BASE_URL or "127.0.0.1")
+
+    def post(self, request, vimid=""):
+        self._logger.info("registration with vimid: %s" % vimid)
+        self._logger.debug("with data: %s" % request.data)
+
+        try:
+            # Get the specified tenant id
+            specified_project_idorname = request.META.get("Project", None)
+
+            # compose the one time backlog item
+            backlog_item = {
+                "id": vimid,
+                "worker": self.register_helper.registryV0,
+                "payload": (vimid, specified_project_idorname),
+                "repeat": 0,
+                "status": (1,
+                           "The registration is on progress")
+            }
+            self.register_thread.add(backlog_item)
+            if 0 == self.register_thread.state():
+                self.register_thread.start()
+
+            return Response(status=status.HTTP_202_ACCEPTED)
+
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except HttpError as e:
+            self._logger.error("HttpError: status:%s, response:%s"
+                               % (e.http_status, e.response.json()))
+            return Response(data=e.response.json(), status=e.http_status)
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return Response(
+                data={'error': str(e)},
+                status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+    def get(self, request, vimid):
+        try:
+            backlog_item = self.register_thread.get(vimid)
+            if backlog_item:
+                return Response(
+                    data={'status': backlog_item.get(
+                        "status", "Status not available, vimid: %s" % vimid)},
+                    status=status.HTTP_200_OK)
+            else:
+                return Response(
+                    data={
+                        'error': "Registration process for "
+                                 "Cloud Region not found: %s"
+                                 % vimid
+                    },
+                    status=status.HTTP_404_NOT_FOUND)
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return Response(
+                data={'error': str(e)},
+                status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+    def delete(self, request, vimid=""):
+        self._logger.debug("Registration--delete::data> %s" % request.data)
+        self._logger.debug("Registration--delete::vimid > %s"% vimid)
+        try:
+
+            # compose the one time backlog item
+            backlog_item = {
+                "id": vimid,
+                "worker": self.register_helper.unregistryV0,
+                "payload": (vimid,),  # important to add , at the end
+                "repeat": 0,
+                "status": (1, "The de-registration is in progress")
+            }
+            self.register_thread.add(backlog_item)
+            if 0 == self.register_thread.state():
+                self.register_thread.start()
+
+            return Response(
+                status=status.HTTP_204_NO_CONTENT
+            )
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except HttpError as e:
+            self._logger.error("HttpError: status:%s, response:%s"
+                               % (e.http_status, e.response.json()))
+            return Response(data=e.response.json(), status=e.http_status)
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return Response(data={'error': str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+
+
+class RegistryHelper(MultiCloudAAIHelper):
+    '''
+    Helper code to discover and register a cloud region's resource
+    '''
+
+    def __init__(self, multicloud_prefix, aai_base_url):
+        # logger.debug("RegistryHelper __init__: %s" % traceback.format_exc())
+        self.proxy_prefix = multicloud_prefix
+        self.aai_base_url = aai_base_url
+        self._logger = logger
+        super(RegistryHelper, self).__init__(multicloud_prefix, aai_base_url)
+
+    def registryV1(self, cloud_owner, cloud_region_id):
+        # cloud_owner = payload.get("cloud-owner", None)
+        # cloud_region_id = payload.get("cloud-region-id", None)
+        vimid = extsys.encode_vim_id(cloud_owner, cloud_region_id)
+        return self.registryV0(vimid)
+
+    def registryV0(self, vimid, project_idorname=None):
+        # populate proxy identity url
+        self._update_proxy_identity_endpoint(vimid)
+
+        # prepare request resource to vim instance
+        # get token:
+        viminfo = VimDriverUtils.get_vim_info(vimid)
+        sess = None
+        if not viminfo:
+            return (
+                10,
+                "Cloud Region not found in AAI: %s" % vimid
+            )
+        if project_idorname:
+            try:
+                # check if specified with tenant id
+                sess = VimDriverUtils.get_session(
+                    viminfo, tenant_name=None,
+                    tenant_id=project_idorname
+                )
+            except Exception as e:
+                pass
+
+            if not sess:
+                try:
+                    # check if specified with tenant name
+                    sess = VimDriverUtils.get_session(
+                        viminfo, tenant_name=project_idorname,
+                        tenant_id=None
+                    )
+                except Exception as e:
+                    pass
+
+        if not sess:
+            # set the default tenant since there is no tenant info in the VIM yet
+            sess = VimDriverUtils.get_session(
+                viminfo, tenant_name=viminfo.get('tenant', None))
+
+        # step 1. discover all projects and populate into AAI
+        retcode, status = self._discover_tenants(vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return (
+        #         retcode, status
+        #     )
+
+        # discover all flavors
+        retcode, status = self._discover_flavors(vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return (
+        #         retcode, status
+        #     )
+
+        # discover all images
+        retcode, status = self._discover_images(vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return (
+        #         retcode, status
+        #     )
+
+        # discover all az
+        retcode, status = self._discover_availability_zones(vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return (
+        #         retcode, status
+        #     )
+
+        # discover all vg
+        #self._discover_volumegroups(vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return (
+        #         retcode, status
+        #     )
+
+        # discover all snapshots
+        #self._discover_snapshots(vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return retcode, status
+
+        # discover all server groups
+        #self.discover_servergroups(request, vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return retcode, status
+
+        # discover all pservers
+        #self._discover_pservers(vimid, sess, viminfo)
+        # if 0 != retcode:
+        #     return retcode, status
+
+        return (
+            0,
+            "Registration finished for Cloud Region: %s" % vimid
+        )
+
+    def unregistryV1(self, cloud_owner, cloud_region_id):
+        # cloud_owner = payload.get("cloud-owner", None)
+        # cloud_region_id = payload.get("cloud-region-id", None)
+        vimid = extsys.encode_vim_id(cloud_owner, cloud_region_id)
+        return self.unregistryV0(vimid)
+
+    def unregistryV0(self, vimid):
+        # prepare request resource to vim instance
+        # get token:
+        viminfo = VimDriverUtils.get_vim_info(vimid)
+        if not viminfo:
+            return (
+                10,
+                "Cloud Region not found:" % vimid
+            )
+
+        cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+
+        # get the resource first
+        resource_url = ("/cloud-infrastructure/cloud-regions/"
+                        "cloud-region/%(cloud_owner)s/%(cloud_region_id)s?depth=all"
+                        % {
+                            "cloud_owner": cloud_owner,
+                            "cloud_region_id": cloud_region_id,
+                        })
+
+        # get cloud-region
+        retcode, content, status_code = \
+            restcall.req_to_aai(resource_url, "GET", nocache=True)
+
+        # add resource-version
+        cloudregiondata = {}
+        if retcode == 0 and content:
+            cloudregiondata = json.JSONDecoder().decode(content)
+        else:
+            return (
+                10,
+                "Cloud Region not found: %s, %s" % (cloud_owner, cloud_region_id)
+            )
+
+        # step 1. remove all tenants
+        tenants = cloudregiondata.get("tenants", None)
+        for tenant in tenants.get("tenant", []) if tenants else []:
+            # common prefix
+            aai_cloud_region = \
+                "/cloud-infrastructure/cloud-regions/cloud-region/%s/%s/tenants/tenant/%s" \
+                % (cloud_owner, cloud_region_id, tenant['tenant-id'])
+
+            # remove all vservers
+            try:
+                # get list of vservers
+                vservers = tenant.get('vservers', {}).get('vserver', [])
+                for vserver in vservers:
+                    try:
+                        # iterate vport, except will be raised if no l-interface exist
+                        for vport in vserver['l-interfaces']['l-interface']:
+                            # delete vport
+                            vport_delete_url =\
+                                aai_cloud_region + \
+                                "/vservers/vserver/%s/l-interfaces/l-interface/%s?resource-version=%s" \
+                                % (vserver['vserver-id'], vport['interface-name'],
+                                   vport['resource-version'])
+                            restcall.req_to_aai(vport_delete_url, "DELETE")
+                    except Exception as e:
+                        pass
+
+                    try:
+                        # delete vserver
+                        vserver_delete_url =\
+                            aai_cloud_region +\
+                            "/vservers/vserver/%s?resource-version=%s" \
+                            % (vserver['vserver-id'],
+                               vserver['resource-version'])
+                        restcall.req_to_aai(vserver_delete_url, "DELETE")
+                    except Exception as e:
+                        continue
+
+            except Exception:
+                self._logger.error(traceback.format_exc())
+                pass
+
+            resource_url = ("/cloud-infrastructure/cloud-regions/"
+                            "cloud-region/%(cloud_owner)s/%(cloud_region_id)s/"
+                            "%(resource_type)ss/%(resource_type)s/%(resource_id)s/"
+                            "?resource-version=%(resource-version)s"
+                            % {
+                                "cloud_owner": cloud_owner,
+                                "cloud_region_id": cloud_region_id,
+                                "resource_type": "tenant",
+                                "resource_id": tenant["tenant-id"],
+                                "resource-version": tenant["resource-version"]
+                            })
+            # remove tenant
+            retcode, content, status_code = \
+                restcall.req_to_aai(resource_url, "DELETE")
+
+        # remove all flavors
+        flavors = cloudregiondata.get("flavors", None)
+        for flavor in flavors.get("flavor", []) if flavors else []:
+            # iterate hpa-capabilities
+            hpa_capabilities = flavor.get("hpa-capabilities", None)
+            for hpa_capability in hpa_capabilities.get("hpa-capability", [])\
+                    if hpa_capabilities else []:
+                resource_url = ("/cloud-infrastructure/cloud-regions/"
+                                "cloud-region/%(cloud_owner)s/%(cloud_region_id)s/"
+                                "%(resource_type)ss/%(resource_type)s/%(resource_id)s/"
+                                "hpa-capabilities/hpa-capability/%(hpa-capability-id)s/"
+                                "?resource-version=%(resource-version)s"
+                                % {
+                                    "cloud_owner": cloud_owner,
+                                    "cloud_region_id": cloud_region_id,
+                                    "resource_type": "flavor",
+                                    "resource_id": flavor["flavor-id"],
+                                    "hpa-capability-id": hpa_capability["hpa-capability-id"],
+                                    "resource-version": hpa_capability["resource-version"]
+                                })
+                # remove hpa-capability
+                retcode, content, status_code = \
+                    restcall.req_to_aai(resource_url, "DELETE")
+
+            # remove flavor
+            resource_url = ("/cloud-infrastructure/cloud-regions/"
+                            "cloud-region/%(cloud_owner)s/%(cloud_region_id)s/"
+                            "%(resource_type)ss/%(resource_type)s/%(resource_id)s/"
+                            "?resource-version=%(resource-version)s"
+                            % {
+                                "cloud_owner": cloud_owner,
+                                "cloud_region_id": cloud_region_id,
+                                "resource_type": "flavor",
+                                "resource_id": flavor["flavor-id"],
+                                "resource-version": flavor["resource-version"]
+                            })
+
+            retcode, content, status_code = \
+                restcall.req_to_aai(resource_url, "DELETE")
+
+        # remove all images
+        images = cloudregiondata.get("images", None)
+        for image in images.get("image", []) if images else []:
+            resource_url = ("/cloud-infrastructure/cloud-regions/"
+                            "cloud-region/%(cloud_owner)s/%(cloud_region_id)s/"
+                            "%(resource_type)ss/%(resource_type)s/%(resource_id)s/"
+                            "?resource-version=%(resource-version)s"
+                            % {
+                                "cloud_owner": cloud_owner,
+                                "cloud_region_id": cloud_region_id,
+                                "resource_type": "image",
+                                "resource_id": image["image-id"],
+                                "resource-version": image["resource-version"]
+                            })
+            # remove image
+            retcode, content, status_code = \
+                restcall.req_to_aai(resource_url, "DELETE")
+
+        # remove all az
+        azs = cloudregiondata.get("availability-zones", None)
+        for az in azs.get("availability-zone", []) if azs else []:
+            # delete az relationship first
+            resource_url = ("/cloud-infrastructure/cloud-regions/"
+                            "cloud-region/%(cloud_owner)s/%(cloud_region_id)s/"
+                            "%(resource_type)ss/%(resource_type)s/%(resource_id)s"
+                            % {
+                                "cloud_owner": cloud_owner,
+                                "cloud_region_id": cloud_region_id,
+                                "resource_type": "availability-zone",
+                                "resource_id": az["availability-zone-name"]
+                            })
+
+            rs = az.get("relationship-list", []).get("relationship", [])
+            for r in rs:
+                retcode, content, status_code = \
+                    restcall.req_to_aai(
+                        resource_url+"/relationship-list/relationship",
+                        "DELETE", content=r)
+
+            # delete az
+            resource_url2 = (resource_url + "?resource-version=%(resource-version)s"
+                             % {"resource-version": az["resource-version"]})
+            retcode, content, status_code = \
+                restcall.req_to_aai(resource_url2, "DELETE")
+
+
+        # remove all vg
+
+        # remove all snapshots
+        snapshots = cloudregiondata.get("snapshots", None)
+        for snapshot in snapshots.get("snapshot", []) if snapshots else []:
+            resource_url = ("/cloud-infrastructure/cloud-regions/"
+                            "cloud-region/%(cloud_owner)s/%(cloud_region_id)s/"
+                            "%(resource_type)ss/%(resource_type)s/%(resource_id)s/"
+                            "?resource-version=%(resource-version)s"
+                            % {
+                                "cloud_owner": cloud_owner,
+                                "cloud_region_id": cloud_region_id,
+                                "resource_type": "snapshot",
+                                "resource_id": snapshot["snapshot-id"],
+                                "resource-version": snapshot["resource-version"]
+                            })
+            # remove snapshot
+            retcode, content, status_code = \
+                restcall.req_to_aai(resource_url, "DELETE")
+
+        # remove all server groups
+
+        # remove all pservers
+
+        # remove cloud region itself
+        resource_url = ("/cloud-infrastructure/cloud-regions/"
+                        "cloud-region/%(cloud_owner)s/%(cloud_region_id)s"
+                        "?resource-version=%(resource-version)s"
+                        % {
+                            "cloud_owner": cloud_owner,
+                            "cloud_region_id": cloud_region_id,
+                            "resource-version": cloudregiondata["resource-version"]
+                        })
+        # remove cloud region
+        retcode, content, status_code = \
+            restcall.req_to_aai(resource_url, "DELETE")
+
+        return retcode, content
+
+    def _discover_tenants(self, vimid="", session=None, viminfo=None):
+        try:
+            # iterate all projects and populate them into AAI
+            cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+            for tenant in self._get_list_resources(
+                    "projects", "identity", session, viminfo, vimid,
+                    "projects"):
+                tenant_info = {
+                    'tenant-id': tenant['id'],
+                    'tenant-name': tenant['name'],
+                }
+                self._update_resoure(
+                    cloud_owner, cloud_region_id, tenant['id'],
+                    tenant_info, "tenant")
+            return 0, "succeed"
+        except VimDriverNewtonException as e:
+            self._logger.error(
+                "VimDriverNewtonException: status:%s, response:%s"
+                % (e.http_status, e.content))
+            return (
+                e.http_status, e.content
+            )
+        except HttpError as e:
+            if e.http_status == status.HTTP_403_FORBIDDEN:
+                ### get the tenant information from the token response
+                try:
+                    ### get tenant info from the session
+                    tmp_auth_state = VimDriverUtils.get_auth_state(session)
+                    tmp_auth_info = json.loads(tmp_auth_state)
+                    tmp_auth_data = tmp_auth_info['body']
+                    tenant = tmp_auth_data['token']['project']
+                    tenant_info = {
+                        'tenant-id': tenant['id'],
+                        'tenant-name': tenant['name'],
+                    }
+
+                    self._update_resoure(
+                        cloud_owner, cloud_region_id, tenant['id'],
+                        tenant_info, "tenant")
+
+                    return 0, "succeed"
+
+                except Exception as ex:
+                    self._logger.error(traceback.format_exc())
+                    return (
+                        11,
+                        str(ex)
+                    )
+            else:
+                self._logger.error(
+                    "HttpError: status:%s, response:%s"
+                    % (e.http_status, e.response.json()))
+                return (
+                    e.http_status, e.response.json()
+                )
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return (
+                11,
+                str(e)
+            )
+
+    def _discover_flavors(self, vimid="", session=None, viminfo=None):
+        try:
+            cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+            for flavor in self._get_list_resources(
+                    "/flavors/detail", "compute", session, viminfo, vimid,
+                    "flavors"):
+                flavor_info = {
+                    'flavor-id': flavor['id'],
+                    'flavor-name': flavor['name'],
+                    'flavor-vcpus': flavor['vcpus'],
+                    'flavor-ram': flavor['ram'],
+                    'flavor-disk': flavor['disk'],
+                    'flavor-ephemeral': flavor['OS-FLV-EXT-DATA:ephemeral'],
+                    'flavor-swap': flavor['swap'],
+                    'flavor-is-public': flavor['os-flavor-access:is_public'],
+                    'flavor-disabled': flavor['OS-FLV-DISABLED:disabled'],
+                }
+
+                if flavor.get('links') and len(flavor['links']) > 0:
+                    flavor_info['flavor-selflink'] =\
+                        flavor['links'][0]['href'] or 'http://0.0.0.0'
+                else:
+                    flavor_info['flavor-selflink'] = 'http://0.0.0.0'
+
+                # add hpa capabilities
+                if (flavor['name'].find('onap.') == 0):
+                    req_resouce = "/flavors/%s/os-extra_specs" % flavor['id']
+                    extraResp = self._get_list_resources(
+                        req_resouce, "compute", session,
+                        viminfo, vimid, "extra_specs")
+
+                    vimtype = viminfo['version']
+                    hpa =  hpa_discovery.HPADiscovery()
+                    for extra_spec in extraResp:
+                        data = {"flavor": flavor, "extra_specs": extraResp, "viminfo": viminfo, "vimtype": vimtype}
+                        hpa_capability = hpa.get_hpa_capabilities(data)
+                        hpa_capabilities.append(hpa_capability)
+
+                    flavor_info['hpa-capabilities'] = \
+                        {'hpa-capability': hpa_capabilities}
+                    logger.debug("hpa_capabilities:%s" % hpa_capabilities)
+
+                retcode, content = self._update_resoure(
+                    cloud_owner, cloud_region_id, flavor['id'],
+                    flavor_info, "flavor")
+
+            return (0, "succeed")
+        except VimDriverNewtonException as e:
+            self._logger.error(
+                "VimDriverNewtonException: status:%s, response:%s" %
+                (e.http_status, e.content))
+            return (
+                e.http_status, e.content
+            )
+        except HttpError as e:
+            self._logger.error("HttpError: status:%s, response:%s" %
+                               (e.http_status, e.response.json()))
+            return (
+                e.http_status, e.response.json()
+            )
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return (
+                11, str(e)
+            )
+
+    def _discover_images(self, vimid="", session=None, viminfo=None):
+        try:
+            cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+            for image in self._get_list_resources(
+                    "/v2/images", "image", session, viminfo, vimid,
+                    "images"):
+                image_info = {
+                    'image-id': image['id'],
+                    'image-name': image['name'],
+                    'image-selflink': image['self'],
+
+                    'image-os-distro': image.get('os_distro') or 'Unknown',
+                    'image-os-version': image.get('os_version') or 'Unknown',
+                    'application': image.get('application'),
+                    'application-vendor': image.get('application_vendor'),
+                    'application-version': image.get('application_version'),
+                    'image-architecture': image.get('architecture'),
+                }
+
+                ret = self._update_resoure(
+                    cloud_owner, cloud_region_id, image['id'], image_info,
+                    "image")
+                if ret != 0:
+                    # failed to update image
+                    self._logger.debug(
+                        "failed to populate image info into AAI: %s,"
+                        " image id: %s, ret:%s"
+                        % (vimid, image_info['image-id'], ret))
+                    continue
+
+                schema = image['schema']
+                if schema:
+                    req_resource = schema
+                    service = {'service_type': "image",
+                               'interface': 'public',
+                               'region_name': viminfo['openstack_region_id']
+                               if viminfo.get('openstack_region_id')
+                               else viminfo['cloud_region_id']
+                               }
+
+                    self._logger.info("making request with URI:%s" %
+                                      req_resource)
+                    resp = session.get(req_resource, endpoint_filter=service)
+                    self._logger.info("request returns with status %s" %
+                                      resp.status_code)
+                    if resp.status_code == status.HTTP_200_OK:
+                        self._logger.debug("with content:%s" %
+                                           resp.json())
+                        pass
+                    content = resp.json()
+
+                    # if resp.status_code == status.HTTP_200_OK:
+                        # parse the schema? TBD
+                        # self.update_image(cloud_owner, cloud_region_id, image_info)
+                        #metadata_info = {}
+            return (0, "succeed")
+        except VimDriverNewtonException as e:
+            self._logger.error("VimDriverNewtonException:"
+                               " status:%s, response:%s" %
+                               (e.http_status, e.content))
+            return (
+                e.http_status, e.content
+            )
+        except HttpError as e:
+            self._logger.error("HttpError: status:%s, response:%s" %
+                               (e.http_status, e.response.json()))
+            return (
+                e.http_status, e.response.json()
+            )
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return (
+                11, str(e)
+            )
+
+    def _discover_availability_zones(self, vimid="", session=None,
+                                     viminfo=None):
+        try:
+            az_pserver_info = {}
+            cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+            for az in self._get_list_resources(
+                    "/os-availability-zone/detail", "compute", session,
+                    viminfo, vimid,
+                    "availabilityZoneInfo"):
+                az_info = {
+                    'availability-zone-name': az['zoneName'],
+                    'operational-status': az['zoneState']['available']
+                    if az.get('zoneState') else '',
+                    'hypervisor-type': '',
+                }
+                # filter out the default az: "internal" and "nova"
+                azName = az.get('zoneName', None)
+                # comment it for test the registration process only
+                #  if azName == 'nova':
+                #    continue
+                if azName == 'internal':
+                    continue
+
+                # get list of host names
+                pservers_info = [k for (k, v) in list(az['hosts'].items())]
+                # set the association between az and pservers
+                az_pserver_info[azName] = pservers_info
+
+                az_info['hypervisor-type'] = 'QEMU' # default for OpenStack
+
+                ret, content = self._update_resoure(
+                    cloud_owner, cloud_region_id, az['zoneName'], az_info,
+                    "availability-zone")
+                if ret != 0:
+                    # failed to update image
+                    self._logger.debug(
+                        "failed to populate az info into AAI: "
+                        "%s, az name: %s, ret:%s"
+                        % (vimid, az_info['availability-zone-name'], ret))
+                    # return (
+                    #     ret,
+                    #     "fail to popluate az info into AAI:%s" % content
+                    # )
+                    continue
+
+                # populate pservers:
+                for hostname in pservers_info:
+                    if hostname == "":
+                        continue
+
+                    pservername = vimid+"_"+hostname
+                    selflink = ""
+                    # if self.proxy_prefix[3:] == "/v1":
+                    #     selflink = "%s/%s/%s/compute/os-hypervisors/detail?hypervisor_hostname_pattern=%s"%\
+                    #            (self.proxy_prefix, cloud_owner, cloud_region_id , hostname)
+                    # else:
+                    #     selflink = "%s/%s/compute/os-hypervisors/detail?hypervisor_hostname_pattern=%s" % \
+                    #                (self.proxy_prefix, vimid, hostname)
+
+                    pinfo = {
+                        "hostname": pservername,
+                        "server-selflink": selflink,
+                        "pserver-id": hostname
+                    }
+                    self._update_pserver(cloud_owner, cloud_region_id, pinfo)
+                    self._update_pserver_relation_az(cloud_owner, cloud_region_id, pinfo, azName)
+                    self._update_pserver_relation_cloudregion(cloud_owner, cloud_region_id, pinfo)
+
+            return (0, az_pserver_info)
+        except VimDriverNewtonException as e:
+            self._logger.error(
+                "VimDriverNewtonException: status:%s,"
+                " response:%s" % (e.http_status, e.content))
+            return (
+                e.http_status, e.content
+            )
+        except HttpError as e:
+            self._logger.error(
+                "HttpError: status:%s, response:%s" %
+                (e.http_status, e.response.json()))
+            return (
+                e.http_status, e.response.json()
+            )
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return (
+                11, str(e)
+            )
+
+    # def _discover_volumegroups(self, vimid="", session=None, viminfo=None):
+    #     cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+    #     for cg in self._get_list_resources(
+    #             "/consistencygroups/detail", "volumev3", session,
+    #             viminfo, vimid,
+    #             "consistencygroups"):
+    #         vg_info = {
+    #             'volume-group-id': cg['id'],
+    #             'volume-group-name': cg['name'],
+    #             'vnf-type': '',
+    #         }
+    #
+    #         ret = self._update_resoure(
+    #             cloud_owner, cloud_region_id, cg['id'], vg_info,
+    #             "volume-group")
+    #         if ret != 0:
+    #             # failed to update image
+    #             self._logger.debug("failed to populate volumegroup info into AAI: %s, volume-group-id: %s, ret:%s"
+    #                                % (vimid, vg_info['volume-group-id'], ret))
+
+    def _discover_snapshots(self, vimid="", session=None, viminfo=None):
+        try:
+            cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+            for ss in self._get_list_resources(
+                    "/snapshots/detail", "volumev3", session,
+                    viminfo, vimid,
+                    "snapshots"):
+                snapshot_info = {
+                    'snapshot-id': ss['id'],
+                    'snapshot-name': ss['name'],
+                }
+                if ss.get('metadata'):
+                    snapshot_info['snapshot-architecture'] = ss['metadata'].get('architecture')
+                    snapshot_info['application'] = ss['metadata'].get('architecture')
+                    snapshot_info['snapshot-os-distro'] = ss['metadata'].get('os-distro')
+                    snapshot_info['snapshot-os-version'] = ss['metadata'].get('os-version')
+                    snapshot_info['application-vendor'] = ss['metadata'].get('vendor')
+                    snapshot_info['application-version'] = ss['metadata'].get('version')
+                    snapshot_info['snapshot-selflink'] = ss['metadata'].get('selflink')
+                    snapshot_info['prev-snapshot-id'] = ss['metadata'].get('prev-snapshot-id')
+
+                ret, content = self._update_resoure(
+                    cloud_owner, cloud_region_id, ss['id'], snapshot_info,
+                    "snapshot")
+                if ret != 0:
+                    # failed to update image
+                    self._logger.debug("failed to populate snapshot info into AAI: %s, snapshot-id: %s, ret:%s"
+                                       % (vimid, snapshot_info['snapshot-id'], ret))
+                    return (
+                        ret,
+                        "fail to populate snapshot into AAI:%s" % content
+                    )
+            return 0, "Succeed"
+        except VimDriverNewtonException as e:
+            self._logger.error("VimDriverNewtonException: status:%s, response:%s" % (e.http_status, e.content))
+            return (
+                e.http_status, e.content
+            )
+        except HttpError as e:
+            self._logger.error("HttpError: status:%s, response:%s" % (e.http_status, e.response.json()))
+            return (
+                e.http_status, e.response.json()
+            )
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return (
+                11, str(e)
+            )
+
+    # def _discover_servergroups(self, vimid="", session=None, viminfo=None):
+    #     for sg in self._get_list_resources(
+    #             "/os-server-groups", "compute", session,
+    #             viminfo, vimid,
+    #             "security groups"):
+
+    def _update_pserver_relation_az(self, cloud_owner, cloud_region_id, pserverinfo, azName):
+        related_link = \
+            "/aai/%s/cloud-infrastructure/cloud-regions/"\
+            "cloud-region/%s/%s/"\
+            "availability-zones/availability-zone/%s" % (
+                settings.AAI_SCHEMA_VERSION, cloud_owner,
+                cloud_region_id, azName)
+
+        relationship_data = \
+            {
+                'related-to': 'availability-zone',
+                'related-link': related_link,
+                'relationship-data': [
+                    {
+                        'relationship-key': 'availability-zone.availability-zone-name',
+                        'relationship-value': azName
+                    }
+                ],
+                "related-to-property": [
+                    {
+                        "property-key": "availability-zone.availability-zone-name"
+                    }
+                ]
+            }
+
+        retcode, content, status_code = \
+            restcall.req_to_aai("/cloud-infrastructure/pservers/pserver/%s"
+                                "/relationship-list/relationship"
+                                % (pserverinfo['hostname']), "PUT",
+                                content=relationship_data)
+
+        self._logger.debug("update_pserver_az_relation,vimid:%s_%s, "
+                           "az:%s req_to_aai: %s, return %s, %s, %s"
+                           % (cloud_owner, cloud_region_id, azName,
+                              pserverinfo['hostname'], retcode, content,
+                              status_code))
+        return (
+            0,
+            "succeed"
+        )
+
+    def _update_pserver_relation_cloudregion(
+            self,
+            cloud_owner,
+            cloud_region_id,
+            pserverinfo
+    ):
+        related_link = \
+            "/aai/%s/cloud-infrastructure/cloud-regions/"\
+            "cloud-region/%s/%s" % (
+                settings.AAI_SCHEMA_VERSION, cloud_owner,
+                cloud_region_id)
+
+        relationship_data = \
+            {
+                'related-to': 'cloud-region',
+                'related-link': related_link,
+                'relationship-data': [
+                    {
+                        'relationship-key': 'cloud-region.cloud-owner',
+                        'relationship-value': cloud_owner
+                    },
+                    {
+                        'relationship-key': 'cloud-region.cloud-region-id',
+                        'relationship-value': cloud_region_id
+                    }
+                ],
+                "related-to-property": [
+                    {
+                        "property-key": "cloud-region.cloud-owner"
+                    },
+                    {
+                        "property-key": "cloud-region.cloud-region-id"
+                    }
+                ]
+            }
+
+        retcode, content, status_code = \
+            restcall.req_to_aai("/cloud-infrastructure/pservers/pserver"
+                                "/%s/relationship-list/relationship"
+                                % (pserverinfo['hostname']), "PUT",
+                                content=relationship_data)
+
+        self._logger.debug("update_pserver_cloudregion_relation,vimid:%s_%s"
+                           " req_to_aai: %s, return %s, %s, %s"
+                           % (cloud_owner, cloud_region_id,
+                              pserverinfo['hostname'], retcode, content,
+                              status_code))
+        return (
+            0,
+            "succeed"
+        )
+
+    def _update_pserver(self, cloud_owner, cloud_region_id, pserverinfo):
+        '''
+        populate pserver into AAI
+        :param cloud_owner:
+        :param cloud_region_id:
+        :param pserverinfo:
+            hostname: string
+            in-maint: boolean
+
+            pserver-name2: string
+            pserver-id: string
+            ptnii-equip-name: string
+            number-of-cpus: integer
+            disk-in-gigabytes: integer
+            ram-in-megabytes: integer
+            equip-type: string
+            equip-vendor: string
+            equip-model: string
+            fqdn: string
+            pserver-selflink: string
+            ipv4-oam-address: string
+            serial-number: string
+            ipaddress-v4-loopback-0: string
+            ipaddress-v6-loopback-0: string
+            ipaddress-v4-aim: string
+            ipaddress-v6-aim: string
+            ipaddress-v6-oam: string
+            inv-status: string
+            internet-topology: string
+            purpose: string
+            prov-status: string
+            management-option: string
+            host-profile: string
+
+        :return:
+        '''
+
+        if cloud_owner and cloud_region_id:
+            resource_url = "/cloud-infrastructure/pservers/pserver/%s" \
+                           % (pserverinfo['hostname'])
+
+            # get cloud-region
+            retcode, content, status_code = \
+                restcall.req_to_aai(resource_url, "GET", nocache=True)
+
+            # add resource-version to url
+            if retcode == 0 and content:
+                content = json.JSONDecoder().decode(content)
+                #pserverinfo["resource-version"] = content["resource-version"]
+                content.update(pserverinfo)
+                pserverinfo = content
+
+            retcode, content, status_code = \
+                restcall.req_to_aai(resource_url, "PUT", content=pserverinfo)
+
+            self._logger.debug(
+                "update_snapshot,vimid:%s_%s req_to_aai: %s,"
+                " return %s, %s, %s" % (
+                    cloud_owner, cloud_region_id,
+                    pserverinfo['hostname'],
+                    retcode, content, status_code))
+
+            return retcode, content
+        else:
+            # unknown cloud owner,region_id
+            return (
+                10,
+                "Cloud Region not found: %s,%s"
+                % (cloud_owner, cloud_region_id)
+            )
+
+    def _discover_pservers(self, vimid="", session=None, viminfo=None):
+        try:
+            cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+            for hypervisor in self._get_list_resources(
+                    "/os-hypervisors/detail", "compute", session,
+                    viminfo, vimid,
+                    "hypervisors"):
+                hypervisor_info = {
+                    'hostname': hypervisor['hypervisor_hostname'],
+                    'in-maint': hypervisor['state'],
+
+                    'pserver-id': hypervisor.get('id'),
+                    'ptnii-equip-name': hypervisor.get('id'),
+                    'disk-in-gigabytes': hypervisor.get('local_gb'),
+                    'ram-in-megabytes': hypervisor.get('memory_mb'),
+                    'pserver-selflink': hypervisor.get('hypervisor_links'),
+                    'ipv4-oam-address': hypervisor.get('host_ip'),
+                }
+
+                if hypervisor.get('cpu_info'):
+                    cpu_info = json.loads(hypervisor['cpu_info'])
+                    if cpu_info.get('topology'):
+                        cputopo = cpu_info.get('topology')
+                        n_cpus = cputopo['cores'] * cputopo['threads'] * cputopo['sockets']
+                        hypervisor_info['number-of-cpus'] = n_cpus
+
+                ret, content = self._update_pserver(cloud_owner, cloud_region_id,
+                                          hypervisor_info)
+                if ret != 0:
+                    # failed to update image
+                    self._logger.debug(
+                        "failed to populate pserver info into AAI:"
+                        " %s, hostname: %s, ret:%s"
+                        % (vimid, hypervisor_info['hostname'], ret))
+                    return ret, "fail to update pserver to AAI:%s" % content
+
+            return 0, "succeed"
+        except VimDriverNewtonException as e:
+            self._logger.error(
+                "VimDriverNewtonException: status:%s, response:%s"
+                % (e.http_status, e.content))
+            return (
+                e.http_status, e.content
+            )
+        except HttpError as e:
+            self._logger.error(
+                "HttpError: status:%s, response:%s"
+                % (e.http_status, e.response.json()))
+            return (
+                e.http_status, e.response.json()
+            )
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return (
+                11, str(e)
+            )
+
+    def _update_proxy_identity_endpoint(self, vimid):
+        '''
+        update cloud_region's identity url
+        :param cloud_owner:
+        :param cloud_region_id:
+        :param url:
+        :return:
+        '''
+        try:
+            cloud_owner, cloud_region_id = extsys.decode_vim_id(vimid)
+            if cloud_owner and cloud_region_id:
+                resource_url = \
+                    "/cloud-infrastructure/cloud-regions" \
+                    "/cloud-region/%s/%s" \
+                    % (cloud_owner, cloud_region_id)
+
+                # get cloud-region
+                retcode, content, status_code = \
+                    restcall.req_to_aai(resource_url, "GET", nocache=True)
+
+                # add resource-version to url
+                if retcode == 0 and content:
+                    viminfo = json.JSONDecoder().decode(content)
+                    viminfo['identity-url'] =\
+                        self.proxy_prefix + "/%s/identity/v2.0" % vimid \
+                            if self.proxy_prefix[-3:] == "/v0" \
+                            else self.proxy_prefix +\
+                                 "/%s/%s/identity/v2.0"\
+                                 % extsys.decode_vim_id(vimid)
+
+                    retcode, content, status_code = \
+                        restcall.req_to_aai(
+                            "/cloud-infrastructure/cloud-regions"
+                            "/cloud-region/%s/%s"
+                            % (cloud_owner, cloud_region_id), "PUT",
+                            content=viminfo)
+
+                    self._logger.debug(
+                        "update_proxy_identity_endpoint,vimid:"
+                        "%s req_to_aai: %s, return %s, %s, %s"
+                        % (vimid, viminfo['identity-url'],
+                           retcode, content, status_code))
+                    return 0, "succeed"
+                else:
+                    self._logger.debug(
+                        "failure: update_proxy_identity_endpoint,vimid:"
+                        "%s req_to_aai: return %s, %s, %s"
+                        % (vimid, retcode, content, status_code))
+                    return retcode, content
+            else:
+                return (
+                    10,
+                    "Cloud Region not found: %s" % vimid
+                )
+
+        except VimDriverNewtonException as e:
+            self._logger.error(
+                "VimDriverNewtonException: status:%s, response:%s"
+                % (e.http_status, e.content))
+            return (
+                e.http_status, e.content
+            )
+        except HttpError as e:
+            self._logger.error(
+                "HttpError: status:%s, response:%s"
+                % (e.http_status, e.response.json()))
+            return (
+                e.http_status, e.response.json()
+            )
+        except Exception as e:
+            self._logger.error(traceback.format_exc())
+            return (
+                11, str(e)
+            )
+