Documentation OOF Spec

Documentation for Policy Specification and Retrieval for OOF
-------------------------------------------------------------

Change-Id: Idb063b85c8bc3ff45b04d522563cffe33b4224c9
Issue-ID: POLICY-536
Signed-off-by: Saryu Shah <ss3917@att.com>

1 files changed, 741 insertions, 0 deletions

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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+******************************************
+Policy Specification and Retrieval for OOF
+******************************************
+
+.. contents::
+    :depth: 2
+
+Introduction
+^^^^^^^^^^^^
+
+The OOF retrieves applicable constraints and objective functions as policies from the policy platform. These policies are retrieved at runtime, thus allowing an operator to change policies as and when needed. These policies are specified using policy models that are on-boarded during the OOF application deployment-time in the policy platform. The OOF-related policy models are typically derived from the constraints and objective functions of an OOF-application. Currently, for R2, these models will be pushed into the policy platform manually using the OOF policy uploader module.
+
+Policy Platform
+^^^^^^^^^^^^^^^
+
+The OOF currently relies on the following features of the policy platform: 
+
+* **Policy specification:** Optimization constraints and objective functions can be specified in terms of policies by service providers and operators.
+* **Policy prioritization:** Policies capturing constraints and objectives can be prioritized.
+* **Policy searching and filtering:** OOF policies can be searched and filtered based on different criteria; by scope or by name patterns
+
+OOF-HAS Service Design Policies
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Service design policies are typically defined as a part of a service design model and evaluated/enforced prior to the service instantiation phase. For example, Hardware Platform Enablement (HPA) policies are defined in an SDC service model and evaluated/enforced during the homing optimization process in ONAP. 
+
+The HPA requirements are captured in a VNF descriptor provided by a vendor. During the service-design phase, these requirements are extracted out from the VNF descriptor and captured in a service model. Some of the HPA requirements cannot be changed during the lifecycle of a service; while other optional requirements can be changed by a service designer or operator over time (e.g. the use of SR-IOV may be preferred by an operator if the SR-IOV capability is optionally provided by a vendor). Once a service model is designed and uploaded into the SDC repository, SDC notifies the policy service about the distribution of a new service model. The policy service then fetches the service model and extracts out the HPA requirements through model decomposition. Next, the policy service creates HPA policies for the homing service (OOF-HAS) by populating the HPA requirements in policy models provided by OOF, and stores the policies in a repository. When the homing service receives a homing request from SO, the homing service asks for the associated HPA policies from the policy platform. Finally, the homing service finds homing solutions based on the evaluation of the received HPA policies and returns the solutions to SO.
+
+Note that all HPA requirements for a given VM can be put in one policy or across different policies. Also, each HPA capability can be enhanced to include mandatory and score attributes. Keeping this in mind, HPA capabilities are defined here. As indicated, policy can have multiple capabilities.
+
+
+.. code-block:: bash
+   :caption: Template for the HPA policies
+   :linenos:
+
+    {
+        "service": "{the model name of a policy}",
+        "policyName": "{policy scope folder}.{policy name; must be unique}",
+        "description": "{description of a policy}",
+        "templateVersion": "{policy model version}",
+        "version": "{policy version}",
+        "priority": "{priority in 1-10; larger the number higher the priority is}",
+        "riskType": "{the type of risk}",
+        "riskLevel": "{the level of risk}",
+        "guard": "{True/False flag to indicate whether guard is applicable or not}",
+        "content": { 
+          "resource": "{resource name}",
+          "identity": "{policy identity}",
+          "policyScope": ["{a tag representing policy scope}"],
+          "policyType": "{policy type}",
+          "flavorFeatures": [
+            {
+              "flavorLabel": "{VM/VFC id}",
+              "flavorProperties":[
+                {
+                  "hpa-feature" : "{HPA feature type}",
+                  "mandatory" : "{mandatoriness of the feature}",
+                  "score" : "{priority of this feature if the feature is not mandatory for VM}"
+                  "architecture": "{supported architecuture}",
+                  "hpa-version": "{version for hpa capability}",
+                  "hpa-feature-attributes": [
+                    {
+                      "hpa-attribute-key": "{attribute name}", 
+                      "hpa-attribute-value": "{attribute value}",
+                      "operator": "{comparison operator}", 
+                      "unit": "{the unit of an attribute}"}
+                  ]
+                }
+              ] 
+            }
+          ]
+        }
+    }
+
+
+.. code-block:: bash
+   :caption: HPA Policy Example
+   :linenos:
+    
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+    #
+    # CPUTHREADPOLICY = prefer, isolate, require
+    # CPUPOLICY = shared, dedicated
+    # PCIETYPEVALUE: SRIOV, PCI-PASSTHROUGH
+    # CPUINST = aes, avx, sha_ni, mpx, adcx, mpx, pclmulqdq, rdrand,sse, etc
+    # MEMORYPAGESIZE = 4KB (unit=KB), 2MB (unit=MB), 1GB(unit=GB), ANY, Other explicit Page size
+
+    {
+        "service": "hpaPolicy",
+        "policyName": "oofBeijing.hpaPolicy_vGMuxInfra",
+        "description": "HPA policy for vGMuxInfra",
+        "templateVersion": "0.0.1",
+        "version": "1.0",
+        "priority": "3",
+        "riskType": "test",
+        "riskLevel": "2",
+        "guard": "False",
+        "content": { 
+          "resources": "vGMuxInfra",
+          "identity": "hpaPolicy_vGMuxInfra",
+          "policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vGMuxInfra"],
+          "policyType": "hpaPolicy",
+          "flavorFeatures": [
+            {
+              "flavorLabel": "flavor_label_vm_01",
+              "flavorProperties":[
+                {
+                  "hpa-feature" : "cpuTopology",
+                  "mandatory" : "True",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key":"numCpuSockets", "hpa-attribute-value": "2","operator": ">=", "unit": ""},
+                    {"hpa-attribute-key":"numCpuSockets", "hpa-attribute-value": "4","operator": "<=", "unit": ""},
+                    {"hpa-attribute-key":"numCpuCores", "hpa-attribute-value": "2", "operator":">=", "unit": ""},
+                    {"hpa-attribute-key":"numCpuCores", "hpa-attribute-value": "4", "operator":"<=", "unit": ""},
+                    {"hpa-attribute-key":"numCpuThreads", "hpa-attribute-value": "4", "operator":">=", "unit": ""},
+                    {"hpa-attribute-key":"numCpuThreads", "hpa-attribute-value": "8", "operator":"<=", "unit": ""}
+                  ]
+                },
+                {
+                  "hpa-feature" : "basicCapabilities",
+                  "mandatory" : "True",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key": "numVirtualCpu", "hpa-attribute-value": "6", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "virtualMemSize", "hpa-attribute-value":"6", "operator": "=", "unit": "GB"}
+                  ]
+                },
+                {
+                  "hpa-feature" : "ovsDpdk",
+                  "mandatory" : "False",
+                  "score" : "3",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                     {"hpa-attribute-key":"dataProcessingAccelerationLibrary", "hpa-attribute-value":"ovsDpdk_version", "operator": "=", "unit":""}
+                  ]
+                },
+                {
+                  "hpa-feature" : "cpuInstructionSetExtensions",
+                  "mandatory" : "True",
+                  "architecture": "INTEL-64",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key":"instructionSetExtensions", "hpa-attribute-value":["<CPUINST>", "<CPUINST>"] "operator": "ALL", "unit":""}
+                  ]
+                }
+              ] 
+            },
+            {
+              "flavorLabel": "flavor_label_vm_02",
+              "flavorProperties":[
+                {
+                  "hpa-feature" : "cpuPinningy",
+                  "mandatory" : "True",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key":"logicalCpuThreadPinningPolicy", "hpa-attribute-value":"<CPUTHREADPOLICY>", "operator": "=", "unit":""},
+                    {"hpa-attribute-key":"logicalCpuPinningPolicy", "hpa-attribute-value": "<CPUPOLICY>","operator": "=", "unit":""},
+                  ]
+                },
+                {
+                  "hpa-feature" : "basicCapabilities",
+                  "mandatory" : "True",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key": "numVirtualCpu", "hpa-attribute-value": "6", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "virtualMemSize", "hpa-attribute-value":"6", "operator": "=", "unit": "GB"}
+                  ]
+                },
+                {
+                  "hpa-feature" : "localStorage",
+                  "mandatory" : "False",
+                  "score" : "5",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key": "diskSize", "hpa-attribute-value": "2", "operator": "=", "unit": "GB"},   
+                    {"hpa-attribute-key": "ephemeralDiskSize", "hpa-attribute-value": "2", "operator": "=", "unit": "GB"},
+                    {"hpa-attribute-key": "swapMemSize", "hpa-attribute-value":"16", "operator": "=", "unit": "MB"},
+                  ]
+                },
+                {
+                  "hpa-feature" : "pcie",
+                  "mandatory" : "True",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key": "pciCount", "hpa-attribute-value": "2", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "pciVendorId", "hpa-attribute-value":"8086", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "pciDeviceId", "hpa-attribute-value": "2", "operator": "=", "unit": ""} 
+                    {"hpa-attribute-key": "functionType", "hpa-attribute-value": "<PCITYPEVALUE>","operator": "=", "unit": ""} 
+                  ]
+                }
+              ] 
+            },
+            {
+              "flavorLabel": "flavor_label_vm_03",
+              "flavorProperties":[
+                {
+                  "hpa-feature" : "numa",
+                  "mandatory" : "False",
+                  "score" : "5",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key": "numaNodes", "hpa-attribute-value": "2", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "numaCpu-0", "hpa-attribute-value":"2", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "numaMem-0", "hpa-attribute-value": "2048", "operator": "=", "unit": "MB"}
+                    {"hpa-attribute-key": "numaCpu-1", "hpa-attribute-value":"4", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "numaMem-1", "value": "4096", "operator": "=", "unit": "MB"}
+                  ]
+                },
+                {
+                  "hpa-feature" : "basicCapabilities",
+                  "mandatory" : "True",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                    {"hpa-attribute-key": "numVirtualCpu", "hpa-attribute-value": "6", "operator": "=", "unit": ""},
+                    {"hpa-attribute-key": "virtualMemSize", "hpa-attribute-value":"6", "operator": "=", "unit": "GB"}
+                  ]
+                },
+                {
+                  "hpa-feature" : "hugePages",
+                  "mandatory" : "False",
+                  "score" : "7",
+                  "architecture": "generic",
+                  "hpa-version": "v1",
+                  "hpa-feature-attributes": [
+                     {"hpa-attribute-key": "memoryPageSize", "hpa-attribute-value": "<MEMORYPAGESIZE>", "operator": "=", "unit": ""}
+                  ]
+                }
+              ] 
+            }
+          ]
+        }
+    }
+    
+
+.. code-block:: bash
+   :caption: Distance Policy Example
+   :linenos:
+        
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by VNF vendors 
+    # or service designers. However, the policy can be updated over time by operators.
+
+    {
+      "service": "distancePolicy",
+      "policyName": "oofBeijing.distancePolicy_vGMuxInfra",
+      "description": "Distance Policy for vGMuxInfra",
+      "templateVersion": "0.0.1",
+      "version": "oofBeijing",
+      "priority": "3",
+      "riskType": "test",
+      "riskLevel": "2",
+      "guard": "False",
+      "content": {
+        "distanceProperties": {
+          "locationInfo": customer_location",
+          "distance": { "value": "500", "operator": "<", "unit": "km" }
+        },
+        "resources": ["vGMuxInfra", "vG"],
+        "applicableResources": "any",
+        "identity": "distance-vGMuxInfra",
+        "policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vGMuxInfra"],
+        "policyType": "distancePolicy"
+      }
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA Basic Capabilities Policy Example
+   :linenos:
+            
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+
+    {
+        "hpa-feature" : "basicCapabilities",
+        "mandatory" : "False",
+        "score" : "5",
+        "architecture": "generic",
+        "hpa-version": "v1",
+        "hpa-feature-attributes": [
+           {"hpa-attribute-key": "numVirtualCpu", "hpa-attribute-value": "6", "operator": "=", "unit": ""},
+           {"hpa-attribute-key": "virtualMemSize", "hpa-attribute-value":"6", "operator": "=", "unit": "GB"}
+        ]
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA OVS DPDK Policy Example
+   :linenos:
+    
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+    #
+    # For this policy others architectures are also applicable.
+
+    {
+        "hpa-feature" : "ovsDpdk",
+        "mandatory" : "False",
+        "score" : "5",
+        "architecture": "INTEL-64",
+        "hpa-version": "v1",
+        "hpa-feature-attributes": [
+          {"hpa-attribute-key":"dataProcessingAccelerationLibrary", "hpa-attribute-value":"ovsDpdk_version", "operator": "=", "unit":""}
+         ]
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA CPU Pinning Policy Example
+   :linenos:
+        
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+
+    {
+       "hpa-feature" : "cpuPinning",
+       "mandatory" : "False",
+       "score" : "5",
+       "architecture": "generic",
+       "hpa-version": "v1",
+       "hpa-feature-attributes": [
+         {"hpa-attribute-key":"logicalCpuThreadPinningPolicy", "hpa-attribute-value":"<CPUTHREADPOLICY>", "operator": "=", "unit":""},
+         {"hpa-attribute-key":"logicalCpuPinningPolicy", "hpa-attribute-value": "<CPUPOLICY>","operator": "=", "unit":""},
+        ]
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA NUMA Policy Example
+   :linenos:
+            
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+
+    {
+        "hpa-feature" : "numa",
+        "mandatory" : "False",
+        "score" : "5",
+        "architecture": "generic",
+        "hpa-version": "v1",
+        "hpa-feature-attributes": [
+           {"hpa-attribute-key": "numaNodes", "hpa-attribute-value": "2", "operator": "=", "unit": ""},
+           {"hpa-attribute-key": "numaCpu-0", "hpa-attribute-value":"2", "operator": "=", "unit": ""},
+           {"hpa-attribute-key": "numaMem-0", "hpa-attribute-value": "2048", "operator": "=", "unit": "MB"},
+           {"hpa-attribute-key": "numaCpu-1", "hpa-attribute-value":"4", "operator": "=", "unit": ""},
+           {"hpa-attribute-key": "numaMem-1", "hpa-attribute-value": "4096", "operator": "=", "unit": "MB"}
+        ]
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA CPU Topology Policy Example
+   :linenos:
+    
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+
+    {
+       "hpa-feature" : "cpuTopology",
+       "mandatory" : "False",
+       "score" : "5",
+       "architecture": "generic",
+       "hpa-version": "v1",
+       "hpa-feature-attributes": [
+          {"hpa-attribute-key":"numCpuSockets", "hpa-attribute-value": "2","operator": ">=", "unit": ""},
+          {"hpa-attribute-key":"numCpuSockets", "hpa-attribute-value": "4","operator": "<=", "unit": ""},
+          {"hpa-attribute-key":"numCpuCores", "hpa-attribute-value": "2", "operator":">=", "unit": ""},
+          {"hpa-attribute-key":"numCpuCores", "hpa-attribute-value": "4", "operator":"<=", "unit": ""},
+          {"hpa-attribute-key":"numCpuThreads", "hpa-attribute-value": "4", "operator":">=", "unit": ""},
+          {"hpa-attribute-key":"numCpuThreads", "hpa-attribute-value": "8", "operator":"<=", "unit": ""}
+       ]
+    }
+    
+
+.. code-block:: bash
+   :caption: Affinity Policy Example
+   :linenos:
+        
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+
+    {
+        "service": "affinityPolicy",
+        "policyName": "oofBeijing.affinityPolicy_vcpe",
+        "description": "Affinity policy for vCPE",
+        "templateVersion": "1702.03",
+        "version": "oofBeijing",
+        "priority": "5",
+        "riskType": "test",
+        "riskLevel": "2",
+        "guard": "False",
+        "content": {
+            "identity": "affinity_vCPE",
+            "policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vGMuxInfra"],
+            "affinityProperties": {
+                "qualifier": "different",
+                "category": "complex"
+            },
+            "policyType": "affinityPolicy",
+            "resources": ["vGMuxInfra", "vG"],
+            "applicableResources": "all"
+        }
+    }
+    
+
+.. code-block:: bash
+   :caption: Capacity Policy Example
+   :linenos:
+            
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers. This policy cannot be changed during the life-cycle of a service.
+
+    {
+        "service": "capacityPolicy",
+        "policyName": "oofBeijing.capacityPolicy_vGMuxInfra",
+        "description": "Capacity policy for vGMuxInfra",
+        "templateVersion": "1702.03",
+        "version": "oofBeijing",
+        "priority": "5",
+        "riskType": "test",
+        "riskLevel": "2",
+        "guard": "False",
+        "content": {
+            "identity": "capacity_vGMuxInfra",
+            "policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vGMuxInfra"],
+            "controller": "multicloud",
+            "capacityProperties": {
+                "cpu": {"value": 2, "operator": ">"},
+                "memory": {"value": 4, "operator": ">", "unit": "GB"}
+                "storage": {"value": 80, "operator": ">", "unit": "GB"}
+            },
+            "policyType": "vim_fit",
+            "resources": ["vGMuxInfra"],
+            "applicableResources": "any"
+        }
+    }
+    
+
+.. code-block:: bash
+   :caption: Min Guarantee Policy Example
+   :linenos:
+                
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers.  This policy cannot be changed during the life-cycle of a service. 
+    # A min-guarantee policy can be specified using the HPA policy model.
+
+    {
+        "service": "minGuaranteePolicy",
+        "policyName": "oofBeijing.minGuaranee_vGMuxInfra",
+        "description": "Min guarantee policy for vGMuxInfra",
+        "templateVersion": "1702.03",
+        "version": "oofBeijing",
+        "priority": "5",
+        "riskType": "test",
+        "riskLevel": "2",
+        "guard": "False",
+        "content": {
+            "identity": "minGuarantee_vGMuxInfra",
+            "policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vGMuxInfra"],
+            "minGuaranteeProperty": {
+                "cpu": "true",
+                "memory": "false",
+            },
+            "type": "minGuaranteePolicy",
+            "resources": ["vGMuxInfra"],
+            "applicableResources": "any"
+        }
+    }
+    
+
+.. code-block:: bash
+   :caption: Optimization Policy Example
+   :linenos:
+                
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers.  This policy cannot be changed during the life-cycle of a service. 
+                    
+    {
+        "service": "PlacementOptimizationPolicy",
+        "policyName": "oofBeijing.PlacementOptimizationPolicy_vGMuxInfra",
+        "description": "Placement Optimization Policy for vGMuxInfra",
+        "templateVersion": "1702.03",
+        "version": "oofBeijing",
+        "priority": "5",
+        "riskType": "test",
+        "riskLevel": "3",
+        "guard": "False",
+        "content": {
+            "objectiveParameter": {
+                "parameterAttributes": [
+                    {
+                        "resources": ["vGMuxInfra"],
+                        "customerLocationInfo": "customer_loc",
+                        "parameter": "distance",
+                        "weight": "1",
+                        "operator": "product"=
+                    },
+                    {
+                        "resources": ["vG"],
+                        "customerLocationInfo": "customer_loc",
+                        "parameter": "distance",
+                        "weight": "1",
+                        "operator": "product"
+                    }
+                ],
+                "operator": "sum"
+            },
+            "identity": "optimization",
+            "policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vGMuxInfra"],
+            "policyType": "placementOptimization",
+            "objective": "minimize"
+        }
+    }
+
+
+.. code-block:: bash
+   :caption: HPA PCIe Policy Example
+   :linenos:
+    
+    # NOTE:
+    #
+    # PCIETYPEVALUE: SRIOV, PCI-PASSTHROUGH
+
+    {
+        "hpa-feature" : "pcie",
+        "mandatory" : "False",
+        "score" : "5",
+        "architecture": "generic",
+        "hpa-version": "v1",
+        "hpa-feature-attributes": [
+          {"hpa-attribute-key": "pciCount", "hpa-attribute-value": "2", "operator": "=", "unit": ""},
+          {"hpa-attribute-key": "pciVendorId", "hpa-attribute-value":"8086", "operator": "=", "unit": ""},
+          {"hpa-attribute-key": "pciDeviceId", "hpa-attribute-value": "2", "operator": "=", "unit": ""} 
+          {"hpa-attribute-key": "functionType", "hpa-attribute-value": "<PCIETYPEVALUE>","operator": "=", "unit": ""} 
+         ]
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA Local Storage Policy Example
+   :linenos:
+                
+    # NOTE:
+    #
+    # The fields in this example policy are typically generated from a TOSCA service model specified by 
+    # VNF vendors or service designers.  This policy cannot be changed during the life-cycle of a service. 
+
+    {
+        "hpa-feature" : "localStorage",
+        "mandatory" : "False",
+        "score" : "5",
+        "architecture": "generic",
+        "hpa-version": "v1",
+        "hpa-feature-attributes": [
+           {"hpa-attribute-key": "diskSize", "hpa-attribute-value": "2", "operator": "=", "unit": "GB"},   
+           {"hpa-attribute-key": "ephemeralDiskSize", "hpa-attribute-value": "2", "operator": "=", "unit": "GB"},
+           {"hpa-attribute-key": "swapMemSize", "hpa-attribute-value":"16", "operator": "=", "unit": "MB"},
+         ]
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA CPU Instruction Set Extensions Policy Example
+   :linenos:
+                
+    # NOTE:
+    #
+    # instructionSetExtensions attribute has a list of all instruction set extensions required. 
+    # CPUINST = aes, avx, sha_ni, mpx, adcx, mpx, pclmulqdq, rdrand, sse, etc
+                    
+    {
+        "hpa-feature" : "cpuInstructionSetExtensions",
+        "mandatory" : "False",
+        "score" : "5",
+        "architecture": "INTEL-64",
+        "hpa-version": "v1",
+        "hpa-feature-attributes": [
+          {"hpa-attribute-key":"instructionSetExtensions", "hpa-attribute-value":["<CPUINST>", "<CPUINST>"] "operator": "ALL", "unit":""}
+         ]
+    }
+    
+
+.. code-block:: bash
+   :caption: HPA Huge Pages Policy Example
+   :linenos:
+                
+    # NOTE:
+    #
+    # MEMORYPAGESIZE = 4KB (unit=KB), 2MB (unit=MB), 1GB(unit GB), ANY, Other explicit Page size
+                    
+    {
+        "hpa-feature" : "hugePages",
+        "mandatory" : "False",
+        "score" : "5",
+        "architecture": "generic",
+        "hpa-version": "v1",
+        "hpa-feature-attributes": [
+          {"hpa-attribute-key": "memoryPageSize", "hpa-attribute-value": "<MEMORYPAGESIZE>", "operator": "=", "unit": ""}
+        ]
+    }
+    
+
+.. code-block:: bash
+   :caption: VNF Policy Example
+   :linenos:
+                
+    # NOTE:
+    #
+    # VNF policy captures the location of inventories and customer information.
+                    
+    {
+        "service": "vnfPolicy",
+        "policyName": "oofBeijing.vnfPolicy_vGMuxInfra",
+        "description": "vnfPolicy",
+        "templateVersion": "1702.03",
+        "version": "oofBeijing",
+        "priority": "6",
+        "riskType": "test",
+        "riskLevel": "3",
+        "guard": "False",
+        "content": {
+            "identity": "vnf_vGMuxInfra",
+            "policyScope": ["vCPE", "INTERNATIONAL", "ip", "vGMuxInfra"],
+            "policyType": "vnf_policy",
+            "resources": ["vGMuxInfra"],
+            "applicableResources": "any",
+            "vnfProperties": [
+                {
+                    "inventoryProvider": "aai",
+                    "serviceType": "",
+                    "inventoryType": "cloudRegionId",
+                    "customerId": ""
+                },
+                {
+                    "inventoryProvider": "multicloud",
+                    "serviceType": "HNGATEWAY",
+                    "inventoryType": "serviceInstanceId",
+                    "customerId": "21014aa2-526b-11e6-beb8-9e71128cae77"
+                }
+            ]
+        }
+    }
+    
+
+.. code-block:: bash
+   :caption: Subscriber Role Policy Example
+   :linenos:
+                
+    # NOTE:
+    #
+    # Subscriber role policy to capture the role of a subscriber and related provisioning states.
+    
+    {
+     "service": "SubscriberPolicy",
+     "policyName": "oofBeijing.SubscriberPolicy_v1",
+     "description": "Subscriber Policy",
+     "templateVersion": "0.0.1",
+     "version": "oofBeijing",
+     "priority": "1",
+     "riskType": "test",
+     "riskLevel": "3",
+     "guard": "False",
+     "content": {
+            "identity": "subscriber",
+            "policyScope": ["vCPE", "subscriber_x", "subscriber_y"],
+            "properties": {
+                    "subscriberName": ["subscriber_x", "subscriber_y"],
+                    "subscriberRole": ["Test"],
+                    "provStatus": ["CAPPED"]
+            },
+            "policyType": "SubscriberPolicy"
+     }
+    }
+    
+
+Modes for Fetching Policies
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+OOF can fetch optimzation policies using the getConfig API of the policy system. The policies can be searched and filtered in two different modes; by-name and by-scope from the policy system.
+
+**By-name**: OOF can send an explicite policy name or a regular expression matching a set of policy names as a part of the getConfig API payload. In return, OOF expects to receive a specific policy or a set of policies with name matching to the regular expression.
+
+**By-scope**: A scope is the domain to which a policy is applicable. Scope information can be captured as a set of attribute-value pairs, which can be sent as a part of the getConfig API payload. In response, the policy system is expected to return a set of policies with the matching attribute-value pairs. A policy can only be included in the response if all the matching attribute-value pairs exist.
+
+OOF can requerst prioritization by enabling a prioritization flag in the getConfig API call to the policy system, and expects to receive a single policy with the highest priority policy among the set of policies meeting the search criteria.
+
+
+TOSCA Policy Models
+^^^^^^^^^^^^^^^^^^^
+
+The following TOSCA policy models need to be uploaded as a dictionary during the deployment-time of an optimization application. Currently, the model uploading porcess is manual since the policy system does not offer an interface to upload models programatically. Once the models are uploaded, policy templates are created in the policy portal/GUI using which optimization policies can be created. Alternatively, the policy system offers CRUD REST APIs using which the policies can be managed by the application.
+
+* HPA Policy
+* Affinity Policy
+* Distance Policy
+* Capacity Policy
+* VNF Policy
+* Optimization Policy
+* Query Policy
+* Subscriber Policy
+
+
+End of Document
+
+.. SSNote: Wiki page ref. https://wiki.onap.org/display/DW/Policy+Specification+and+Retrieval+for+OOF
+
+