vDNS on Azure

Owned by Sudhakar Reddy
Last updated: Oct 14, 2018
4 min read

Introduction

This document explains the steps to on-board and instantiate vDNS on Azure

Pre-requisites

  1. ONAP environment should be available as mentioned here

Demo Video 

Refer to the video on how to on-board and instantiate vDNS on Azure(E2E)

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The detailed steps are provided below:

Onboarding and Service Design

  1. Onboard the vDNS VNF using the TOSCA designed using Simple profile nodes. TOSCA csar is available on  Github: https://github.com/onapdemo/demo/blob/beijing/tosca/aria_csars/simple_vdns.csar?raw=true 
  2. Import the vDNS VSP and create the VNF as shown in the video
  3. After creating the VNF, use the deployment artifact link to add the Azure specific TOSCA in the OTHER folder.
    1. Azure specific TOSCA for base vDNS is available on Github: https://github.com/onapdemo/demo/blob/beijing/tosca/aria_csars/azurevdns.csar?raw=true
    2. Azure specific TOSCA for DNS scaling is available on Github: https://github.com/onapdemo/demo/blob/beijing/tosca/aria_csars/dnsscaling.csar?raw=true
  4. Using SDC catalog, create the vDNS service by adding two VNFs that were imported.
  5. Distribute the service to SO and AAI

Service Provisioning

Once the service model gets distributed to SO & AAI, service instantiation can be done using VID UI

Pre-requisites 

Refer to vDNS on Azure page

Steps to instantiate

  1. Login to VID and click on Browse Service Models(Left menu)
  2. Click on Deploy and then enter the service instance name and other details to create the service.
  3. Once created, you can see the service instance details with an option to "Add VNF".
  4. Click on Add VNF and select the VNF module.Enter the VNF name and other details to create the VNF.
  5. Preload SDNC data by capturing the VNF model data information

    1. POST /restconf/operations/VNF-API:preload-vnf-topology-operation

      vDNS Preload Request Body 
      {
	"input": {
		"vnf-topology-information": {
			"vnf-topology-identifier": {
				"service-type": "{{vdns_vnf_id}}",
				"vnf-name": "Vfmodule_vLB_BASE_140902",
				"vnf-type": "AzureVdnsVsp..base_vlb..module-0",
				"generic-vnf-name": "zdfw1lb01lb01",
				"generic-vnf-type": "azure-vdns-service/azure-vdns-vsp 0"
			},
			"vnf-assignments": {
				"availability-zones": [],
				"vnf-networks": [],
				"vnf-vms": []
			},
			"vnf-parameters": [{
					"vnf-parameter-name": "vlb_image_name",
					"vnf-parameter-value": "ubuntu16-ecomp.qcow2"
				},
				{
					"vnf-parameter-name": "vlb_flavor_name",
					"vnf-parameter-value": "m1.medium"
				},
				{
					"vnf-parameter-name": "vlb_private_net_id",
					"vnf-parameter-value": "vlb_vdns_vsubnet"
				},
				{
					"vnf-parameter-name": "pktgen_private_net_id",
					"vnf-parameter-value": "vpg_vlb_vsubnet"
				},
				{
					"vnf-parameter-name": "onap_private_subnet_id",
					"vnf-parameter-value": "public_vsubnet"
				},
				{
					"vnf-parameter-name": "vlb_private_net_cidr",
					"vnf-parameter-value": "172.23.10.0/24"
				},
				{
					"vnf-parameter-name": "pktgen_private_net_cidr",
					"vnf-parameter-value": "172.23.9.0/24"
				},
				{
					"vnf-parameter-name": "onap_private_net_cidr",
					"vnf-parameter-value": "172.23.8.0/24"
				},
				{
					"vnf-parameter-name": "vlb_private_ip_0",
					"vnf-parameter-value": "172.23.10.111"
				},
				{
					"vnf-parameter-name": "vlb_private_ip_1",
					"vnf-parameter-value": "172.23.8.1"
				},
				{
					"vnf-parameter-name": "vlb_private_ip_2",
					"vnf-parameter-value": "172.23.9.111"
				},
				{
					"vnf-parameter-name": "vdns_private_ip_0",
					"vnf-parameter-value": "172.23.10.211"
				},
				{
					"vnf-parameter-name": "vdns_private_ip_1",
					"vnf-parameter-value": "172.23.8.3"
				},
				{
					"vnf-parameter-name": "vpg_private_ip_0",
					"vnf-parameter-value": "172.23.9.110"
				},
				{
					"vnf-parameter-name": "vpg_private_ip_1",
					"vnf-parameter-value": "172.23.8.2"
				},
				{
					"vnf-parameter-name": "vlb_name_0",
					"vnf-parameter-value": "zdfw1lb01lb01"
				},
				{
					"vnf-parameter-name": "vdns_name_0",
					"vnf-parameter-value": "zdfw1lb01dns01"
				},
				{
					"vnf-parameter-name": "vpg_name_0",
					"vnf-parameter-value": "zdfw1lb01pg01"
				},
				{
					"vnf-parameter-name": "dcae_collector_ip",
					"vnf-parameter-value": "{{sdnc_ip}}"
				},
				{
					"vnf-parameter-name": "dcae_collector_port",
					"vnf-parameter-value": "30235"
				},
				{
					"vnf-parameter-name": "repo_url_blob",
					"vnf-parameter-value": "https://raw.githubusercontent.com/onapdemo/onap-scripts/beijing/usecases"
				},
				{
					"vnf-parameter-name": "repo_url_artifacts",
					"vnf-parameter-value": "https://nexus.onap.org/content/groups/public"
				},
				{
					"vnf-parameter-name": "demo_artifacts_version",
					"vnf-parameter-value": "1.1.1"
				},
				{
					"vnf-parameter-name": "install_script_version",
					"vnf-parameter-value": "1.1.1"
				},
				{
					"vnf-parameter-name": "pub_key",
					"vnf-parameter-value": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC+nbU5EGLqxaArpZYl5zzLCZaJf+U8ycmUNNHabgIBpngdv77cCVE7lT8ajs/Y6O4amUgAIXKPWcaYolhcV9IfLFY3Wt8LcKd97NSAaq5wlTFinsofC9L65MTqgK7vVQ6gvRWrekmHjeCgsfi20gQWmMKOXJhD+Mz4S0v9JHsWinY6xrxgzabFlDE0giasxFXQzBbmWtZwn9443NrpNkKA2phKjXQM6v7Pi9Th6gOUMPSVo8sxfYJ1WUkLI7Qxrcb+mfPQkHAJpTvxIot+cHdDY61l2QuIDbV4FFO4Cn3P3mFrrBnu99h1fxa8klmPDv7APcpbZoo/O7CyapQt78Jn"
				},
				{
					"vnf-parameter-name": "cloud_env",
					"vnf-parameter-value": "azure"
				}
			]
		},
		"request-information": {
			"request-id": "robot19",
			"order-version": "1",
			"notification-url": "openecomp.org",
			"order-number": "1",
			"request-action": "PreloadVNFRequest"
		},
		"sdnc-request-header": {
			"svc-request-id": "robot19",
			"svc-notification-url": "http://openecomp.org:8080/adapters/rest/SDNCNotify",
			"svc-action": "reserve"
		}
	}
}

    In preload parameters, repo_url_blob refers to Github link where the modified scripts for vDNS installation are kept.

    {
"vnf-parameter-name": "repo_url_blob",
"vnf-parameter-value": "https://raw.githubusercontent.com/onapdemo/onap-scripts/master/usecases"
}
  6. Click on Add VF module.The vf-module should match the naming convention : "Vfmodule_<ANY_STRING>". This ensures the Policy to create the vf-module name for the scaling by replacing "Vfmodule_" to "vDNS_"
  7. Enter the details and submit the request. This will instantiate the PG(Packet Generator), LB(Load Balancer) and DNS VMs on Azure

Testing vDNS Instantiation

  1. SSH to PG VM.
    1. ssh ubuntu@vpgtestapp.eastus.cloudapp.azure.com 
    2. Password: Qwertyuiop@@1

  2. Execute the command: nslookup host1.dnsdemo.onap.org 172.23.9.111 


  3. sudo tcpdump -i eth1

ClosedLoop Execution

The closed loop flow in case vDNS spawn a new DNS server based on the event trigger generated by DCAE.

Steps to create ClosedLoop

  1. Push policies

    First go through below link and validate the health of the policy pods.

    https://lf-onap.atlassian.net/wiki/display/DW/Policy+on+OOM

    Then do these steps

    1. Go to pap container
    2. Go to  /tmp/policy-install/config/
    3. execute command "export PRELOAD_POLICIES=true"
    4. execute push-policies.sh (./push-policies.sh)

  2. Preload vDNS scaling data in SDNC. As mentioned in earlier section, the vnf-name should prepend with "vDNS_"

    DNS scaling Preload request body 
    {
	"input": {
		"vnf-topology-information": {
			"vnf-topology-identifier": {
				"service-type": "{{vdns_vnf_id}}",
				"vnf-name": "vDNS_vLB_BASE_140902",
				"vnf-type": "AzureVdnsVsp..dnsscaling..module-1",
				"generic-vnf-name": "zdfw1lb01lb01",
				"generic-vnf-type": "azure-vdns-service/azure-vdns-vsp 0"
			},
			"vnf-assignments": {
				"availability-zones": [],
				"vnf-networks": [],
				"vnf-vms": []
			},
			"vnf-parameters": [{
					"vnf-parameter-name": "vlb_image_name",
					"vnf-parameter-value": "ubuntu16-ecomp.qcow2"
				},
				{
					"vnf-parameter-name": "vlb_flavor_name",
					"vnf-parameter-value": "m1.medium"
				},
				{
					"vnf-parameter-name": "vlb_private_net_id",
					"vnf-parameter-value": "vlb_vdns_vsubnet"
				},
				{
					"vnf-parameter-name": "onap_private_subnet_id",
					"vnf-parameter-value": "public_vsubnet"
				},
				{
					"vnf-parameter-name": "vlb_private_net_cidr",
					"vnf-parameter-value": "172.23.10.0/24"
				},
				{
					"vnf-parameter-name": "onap_private_net_cidr",
					"vnf-parameter-value": "172.23.8.0/24"
				},
				{
					"vnf-parameter-name": "vlb_private_ip_0",
					"vnf-parameter-value": "172.23.10.111"
				},
				{
					"vnf-parameter-name": "vlb_private_ip_1",
					"vnf-parameter-value": "172.23.8.1"
				},
				{
					"vnf-parameter-name": "vdns_private_ip_0",
					"vnf-parameter-value": "172.23.10.212"
				},
				{
					"vnf-parameter-name": "vdns_private_ip_1",
					"vnf-parameter-value": "172.23.8.3"
				},
				{
					"vnf-parameter-name": "vdns_name_0",
					"vnf-parameter-value": "zdfw1lb01dns02"
				},
				{
					"vnf-parameter-name": "repo_url_blob",
					"vnf-parameter-value": "https://raw.githubusercontent.com/onapdemo/onap-scripts/beijing/usecases"
				},
				{
					"vnf-parameter-name": "repo_url_artifacts",
					"vnf-parameter-value": "https://nexus.onap.org/content/groups/public"
				},
				{
					"vnf-parameter-name": "demo_artifacts_version",
					"vnf-parameter-value": "1.1.1"
				},
				{
					"vnf-parameter-name": "install_script_version",
					"vnf-parameter-value": "1.1.1"
				},
				{
					"vnf-parameter-name": "pub_key",
					"vnf-parameter-value": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC+nbU5EGLqxaArpZYl5zzLCZaJf+U8ycmUNNHabgIBpngdv77cCVE7lT8ajs/Y6O4amUgAIXKPWcaYolhcV9IfLFY3Wt8LcKd97NSAaq5wlTFinsofC9L65MTqgK7vVQ6gvRWrekmHjeCgsfi20gQWmMKOXJhD+Mz4S0v9JHsWinY6xrxgzabFlDE0giasxFXQzBbmWtZwn9443NrpNkKA2phKjXQM6v7Pi9Th6gOUMPSVo8sxfYJ1WUkLI7Qxrcb+mfPQkHAJpTvxIot+cHdDY61l2QuIDbV4FFO4Cn3P3mFrrBnu99h1fxa8klmPDv7APcpbZoo/O7CyapQt78Jn"
				},
				{
					"vnf-parameter-name": "cloud_env",
					"vnf-parameter-value": "azure"
				}
			]
		},
		"request-information": {
			"request-id": "robot19",
			"order-version": "1",
			"notification-url": "openecomp.org",
			"order-number": "1",
			"request-action": "PreloadVNFRequest"
		},
		"sdnc-request-header": {
			"svc-request-id": "robot19",
			"svc-notification-url": "http://openecomp.org:8080/adapters/rest/SDNCNotify",
			"svc-action": "reserve"
		}
	}
}

  3. Heat bridge creation - In case of Openstack, heat bridge creation involves fetching the data from Openstack stack details and creating the vservers in AAI. In case of Azure, we will execute a CURL request to AAI to create vservers directly.

    AAI -Add vserver bulk 
    PUT /aai/v11/bulkadd


{
	"transactions": [{
			"put": [{
				"uri": "/cloud-infrastructure/cloud-regions/cloud-region/ATT/EastUS/tenants/tenant/56487312973496734634634/vservers/vserver/61a4361c-bced-4354-8e55-e266bf6173c0",
				"body": {
					"vserver-id": "61a4361c-bced-4354-8e55-e266bf6173c0",
					"vserver-name": "zdfw1lb01lb01",
					"vserver-name2": "zdfw1lb01lb01",
					"prov-status": "ACTIVE",
					"in-maint": false,
					"is-closed-loop-disabled": false,
					"vserver-selflink": "",
					"relationship-list": {
						"relationship": [{
							"related-to": "generic-vnf",
							"relationship-data": [{
								"relationship-key": "generic-vnf.vnf-id",
								"relationship-value": "{{vdns_vnf_id}}"
							}]
						}]
					}
				}
			}]
		},
		{
			"put": [{
				"uri": "/cloud-infrastructure/cloud-regions/cloud-region/ATT/EastUS/tenants/tenant/56487312973496734634634/vservers/vserver/6daff648-77ee-4bc5-bc50-df6e6c3c182b",
				"body": {
					"vserver-id": "6daff648-77ee-4bc5-bc50-df6e6c3c182b",
					"vserver-name": "zdfw1lb01pg01",
					"vserver-name2": "zdfw1lb01pg01",
					"prov-status": "ACTIVE",
					"in-maint": false,
					"is-closed-loop-disabled": false,
					"vserver-selflink": "",
					"relationship-list": {
						"relationship": [{
							"related-to": "generic-vnf",
							"relationship-data": [{
								"relationship-key": "generic-vnf.vnf-id",
								"relationship-value": "{{vdns_vnf_id}}"
							}]
						}]
					}
				}
			}]
		},
		{
			"put": [{
				"uri": "/cloud-infrastructure/cloud-regions/cloud-region/ATT/EastUS/tenants/tenant/56487312973496734634634/vservers/vserver/6bcd939d-cd0b-4eaa-bc46-e2ea4163276f",
				"body": {
					"vserver-id": "6bcd939d-cd0b-4eaa-bc46-e2ea4163276f",
					"vserver-name": "zdfw1lb01dns01",
					"vserver-name2": "zdfw1lb01dns01",
					"prov-status": "ACTIVE",
					"in-maint": false,
					"is-closed-loop-disabled": false,
					"vserver-selflink": "",
					"relationship-list": {
						"relationship": [{
							"related-to": "generic-vnf",
							"relationship-data": [{
								"relationship-key": "generic-vnf.vnf-id",
								"relationship-value": "{{vdns_vnf_id}}"
							}]
						}]
					}
				}
			}]
		}
	]
}

  4. Create a dummy vf-module in AAI -  This ensures Policy to pick the vf-module model data and will send the same in request body to SO create Vf-Module request.

    AAI - Create vf-module Dummy 
    PUT /aai/v11/network/generic-vnfs/generic-vnf/{{vdns_vnf_id}}/vf-modules/vf-module/dummy_{{vdns_vnf_id}}


{
  "is-base-vf-module": false,
  "model-invariant-id": "972f1ca6-4b23-478d-9c6f-a6137146569f",
  "model-version-id": "e8bdc61d-2a89-4bc8-917c-e0e624150dcb",
  "vf-module-id": "dummy_{{vdns_vnf_id}}",
  "vf-module-name": "dummy_{{vdns_vnf_id}}"
}

Running vDNS with Robot Framework

This vDNS automation handles model creation and instantiation.

Run the vDNS script as following:

  • Connect to the Azure VM where ONAP is deployed via SSH and execute the following commands

    [root@onap-tanmay:/home/ubuntu/oom/kubernetes/robot]# cd /opt/aee/oom/kubernetes/robot/
[root@onap-tanmay:/home/ubuntu/oom/kubernetes/robot]# ./demo-k8s.sh instantiateAzureVDNS


 

Output of the Execution-

 

Console -

Azure Portal - 

Log-

vDNS on Azure

Additional information

Based on the preferences, User can modify following files to instantiate vFW on Azure.

    1. integration_preload_parameters.py
      This file is available under /dockerdata-nfs/<namespace>/robot/eteshare/config/ in Azure VM where ONAP is deployed. User can modify preload parameters for vDNS Instantiation under - "azurevdns_preload.template".
    2. integration_robot_properties.py
      This file is available under /dockerdata-nfs/<namespace>/robot/eteshare/config/ in Azure VM where ONAP is deployed. User can modify fields such as "AZURE_SUBSCRIPTION_ID" , "AZURE_TENANT_ID" , "AZURE_CLIENT_ID" , "AZURE_CLIENT_SECRET" , "AZURE_CLOUD_OWNER" , "AZURE_CLOUD_REGION"

Make sure you compile these python file after any modification using command - python <filename>