There are two configuration files for A1 Policy Management Service, config/application_configuration.json and config/application.yaml
The first (config/application_configuration.json) contains configuration needed by the application, such as which near-RT-RICs, controller, or DMaaP topic to use.
The second (config/application.yaml) contains logging and security configurations.

Note: Version numbers used in this page may not be the most recent ... you should verify the latest version numbers for released pre-built components in the docker image repository (https://nexus3.onap.org)

Static configuration - Settings that cannot be changed at runtime (application.yaml)

The file ./config/application.yaml is read by the application at startup. It provides the following configurable features:

• server; configuration for the WEB server
  • used port for HTTP/HTTPS, this is however not the port numbers visible outside the container
  • SSL parameters for setting up using of key store and trust store databases.
• webclient; configuration parameters for a web client used by the component
  
  • SSL parameters for setting up using of key store and trust store databases.
  • Usage of HTTP Proxy; if configured, the proxy will be used for accessing the near-RT-RICs
• logging; setting of of which information that is logged.
• filepath; the local path to a file used for dynamic "Dynamic configuration" (if used). See next chapter.

For details about the parameters in this file, see documentation in the file.
Sample 

(A sample static config file can be found in the repo: application.yaml

...

See also Istanbul - Configuration of Certs

Dynamic configuration - Settings that can be changed at runtime (application_configuration.json or REST or Consul or ConfigMap)

The component has configuration that can be updated in runtime. This configuration can either be loaded from a file (accessible from the container), or from a CBS/Consul database (Cloudify), or using the Configuration REST API. The configuration is re-read and refreshed at regular intervals.

The configuration includes:

• Optional Controller configuration, e.g. an SDNC instance (with A1-Adapter)
• One entry for each near-RT-RIC, which includes:
  • The base URL of the near-RT-RIC
  • A optional list of O1 identifiers that near-RT-RIC is controlling. An application can query this service which near-RT-RIC should be addressed for which component (e.g. cells, sectors, locations, etc.) .
  • An optional reference to the controller to use, or excluded if the near-RT-RIC can be accessed directly from this A1 Policy Management Service.
• Optional configuration for using of DMAAP. There can be one stream for requests to the component and an other stream for responses.

For details about the syntax of the file, there is an example in source code repository/config/application_configuration.json. This file is also included in the docker container /opt/app/policy-agent/data/application_configuration.json_example.

Sample JSON Configuration

A sample configuration is included below.

...

...

(Jakarta))

#
# ============LICENSE_START=======================================================
# ONAP : ccsdk oran
# ================================================================================
# Copyright (C) 2020 Nordix Foundation. All rights reserved.
# ================================================================================
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0
# ============LICENSE_END=========================================================
#
spring:
  profiles:
    active: prod
  main:
    allow-bean-definition-overriding: true
  aop:
    auto: false
management:
  endpoints:
    web:
      exposure:
        # Enabling of springboot actuator features. See springboot documentation.
        include: "loggers,logfile,health,info,metrics,threaddump,heapdump"
 
logging:
  # Configuration of logging
  level:
    ROOT: ERROR
    org.springframework: ERROR
    org.springframework.data: ERROR
    org.springframework.web.reactive.function.client.ExchangeFunctions: ERROR
    org.onap.ccsdk.oran.a1policymanagementservice: INFO
    # org.onap.ccsdk.oran.a1policymanagementservice.tasks: TRACE 
  file:
    name: /var/log/policy-agent/application.log
server:
   # Configuration of the HTTP/REST server. The parameters are defined and handeled by the springboot framework.
   # See springboot documentation.
   port : 8433
   http-port: 8081
   ssl:
      key-store-type: JKS
      key-store-password: policy_agent
      key-store: /opt/app/policy-agent/etc/cert/keystore.jks
      key-password: policy_agent
      key-alias: policy_agent
app:
  # Location of the component configuration file. The file will only be used if the Consul database is not used;
  # configuration from the Consul will override the file.
  filepath: /opt/app/policy-agent/data/application_configuration.json
  webclient:
    # Configuration of the trust store used for the HTTP client (outgoing requests)
    # The file location and the password for the truststore is only relevant if trust-store-used == true
    # Note that the same keystore as for the server is used.
    trust-store-used: false
    trust-store-password: policy_agent
    trust-store: /opt/app/policy-agent/etc/cert/truststore.jks
    # Configuration of usage of HTTP Proxy for the southbound accesses.
    # The HTTP proxy (if configured) will only be used for accessing NearRT RIC:s
    # proxy-type can be either HTTP, SOCKS4 or SOCKS5
    http.proxy-host:
    http.proxy-port: 0
    http.proxy-type: HTTP
  # path where the service can store data
  vardata-directory: /var/policy-management-service
  config-file-schema-path:

See also Jakarta - Configuration of Certs

Dynamic configuration - Settings that can be changed at runtime (application_configuration.json or REST)

The component has configuration that can be updated in runtime. This configuration can either be loaded from a file (accessible from the container) or using the Configuration REST API. The configuration is re-read and refreshed at regular intervals.

The configuration includes:

• controller : Optional A1 Controller configuration, e.g. an SDNC instance (with A1-Adapter)
  • name : for use later in the configuration
  • baseUrl : the URL of the A1 controller (e.g. SDNC + A1 Adapter)
  • userName & password : to configure security parameters to access to the controller
  • The A1 Policy Management service can entirely by-pass the A1-Controller (SDNC + A1 Adapter) if desired - it is optional to access the near-RT-RIC through an A1-Controller.
    In the configuration the "controller" property is optional in the "ric" objects (below)
    If all configured rics bypass the A1-Controller (do not have "controller" values) then the "controller" object at the top of the configuration can be omitted.
    If all configured rics bypass the A1-Controller there is no need to start an A1-Controller.
    There is no functional gain in accessing the near-RT-RIC through an A1-Controller.
• ric : One entry for each near-RT-RIC, which includes:
  • name : a friendly name to refer to the near-RT-RIC
  • baseUrl : The base URL of the A1 interface endpoint in the near-RT-RIC.
  • managedElementIds : A optional list of identifiers that near-RT-RIC is using. An application can query the A1 Policy Management Service to retrieve "RIC" instance associated with these identiefiers. (e.g. cells, sectors, locations, etc.) .
  • controller : An optional reference to the controller to use, or excluded if the near-RT-RIC can be accessed directly from this A1 Policy Management Service.
  • customAdapterClass: Note: This functionality is not available in Jakarta ... will be added in Kohn release:
    • An optional java class name to be used for the southbound interface towards the NearRT RIC. If this is not given the PMS will automatically discover the A1-P API version supported by the NearRT-RIC.
      This parameter can be used for explicitly defining a class to be used. See the example below using the "customAdapterClass" property. The class used has to be in the class path of the built container.
      This means that the PMS can be extended to support any protocol towards the NearRT RIC without changing its implementation.
      On how to implement such an adapter class, see the source code and the actual class referred to in the configuration example below.
• DMaaP configuration: Optional. Used if the A1 Policy Management Service is configured to send/receive API calls over a DMaaP topic:
  • streams_subscribes : Information on the DMaaP topic to receive API requests
  • streams_publishes : Information on the DMaaP topic to publish API responses

For details about the syntax of the file, there is an example in source code repository /config/application_configuration.json (Jakarta). This file is also included in the docker container /opt/app/policy-agent/data/application_configuration.json_example.

Sample JSON Configuration

A sample configuration is included below.
(Note the configuration below is just a sample, and should be updated to match particular deployments. 
The deployment below assumes an A1 Controller function (SDNC) exists - addressable at the url given, using the authentication credentials given, with 4 'RIC's urls specified, and that the specified DMaaP topics are available.)


{
  "description": "Application configuration",
  "config": {    
    "controller": [
      {
        "name": "controller1",
        "baseUrl": "http://sdnc_controller:8181",
        "userName": "admin",
        "password": "Kp8bJ4SXszM0WXlhak3eHlcse2gAw84vaoGGmJvUy2U"
      }
    ],
    "ric": [
      {
        "name": "controller1ric1",
        "baseUrl": "http://sdnc_controller:8181ric1:8085/", 
        "userNamemanagedElementIds": "admin[
          "kista_1",
          "password": "Kp8bJ4SXszM0WXlhak3eHlcse2gAw84vaoGGmJvUy2U"kista_2"         ]
      },
    ],  {
  "ric": [     "name": "ric2",
{        "baseUrl": "name": "ric1http://ric2:8085/",
        "baseUrlcustomAdapterClass": "http://ric1:8085/org.onap.ccsdk.oran.a1policymanagementservice.clients.StdA1ClientVersion2$Factory",   
        "managedElementIds": [
          "kista_13",
          "kista_24"
            ]
      },
       {
        "name": "ric2ric3",
        "baseUrl": "http://ric2ric3:8085/",
        "customAdapterClasscontroller": "org.onap.ccsdk.oran.a1policymanagementservice.clients.StdA1ClientVersion2$Factorycontroller1", 
  
               "managedElementIds": [
          "kista_35",
          "kista_46"
        ]
      },
       {
        "name": "ric3ric4",
        "baseUrl": "http://ric3ric4:8085/",
        "controller": "controller1", 
         "managedElementIds": [
          "kista_7",
          "kista_8",
          "kista_59",
          "kista_10",
          "kista_6"
_11"
         ]
      }
]    ]
  },
  "streams_publishes": {
   { "dmaap_publisher": {
      "nametype": "ric4message_router",
        "baseUrldmaap_info": "http://ric4:8085/",{
        "controllertopic_url": "controller1",http://admin:admin@localhost:6845/events/A1-POLICY-AGENT-WRITE"
         "managedElementIds":}
[    }
  },
   "kistastreams_7",
  subscribes": {
    "dmaap_subscriber": {
      "type": "kistamessage_8router",
   
      "kistadmaap_9info",: {
         "kistatopic_10url",
          "kista_11: "http://admin:admin@localhost:6845/events/A1-POLICY-AGENT-READ/users/policy-agent?timeout=15000&limit=100"
         ]  }
    }
    ]
  }
}

JSON Schema for the application configuration

The configuration must comply to the following JSON schema. There are several tools on internet publicly available tools (e.g. online) where it is possible to validate JSON against a schema. to validate JSON objects against their schema. 
The schema is available in the gerrit repo : application_configuration_schema.json (Jakarta)

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "config": {
      "type": "object",
      "properties": {
        "//description": {
          "type": "string"
        },
        "description": {
          "type": "string"
        },
        "controller": {
          "type": "array",
          "items": [
            {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string"
                },
                "baseUrl": {
                  "type": "string"
                },
                "userName": {
                  "type": "string"
                },
                "password": {
                  "type": "string"
                }
              },
              "required": [
                "name",
                "baseUrl",
                "userName",
                "password"
              ],
              "additionalProperties": false
            }
          ]
        },
        "ric": {
          "type": "array",
          "items":
[        },
    {    "ric": {
          "type": "objectarray",
              "propertiesitems": {[
                "name": {
                  "type": "stringobject",
              "properties": {
},                 "baseUrlname": {
                  "type": "string"
                },
                "controllerbaseUrl": {
                  "type": "string"
                },
                 "customAdapterClasscontroller" : {
                  "type": "string"
                },
                "managedElementIds": {
                  "type": "array",
                  "items": [
                    {
                      "type": "string"
                    },
                    {
                      "type": "string"
                    }
                  ]
                }
              },
              "required": [
                "name",
                "baseUrl",
                "managedElementIds"
              ],
              "additionalProperties": false
            }
          ]
        },
        "streams_publishes": {
          "type": "object",
          "properties": {
            "dmaap_publisher": {
              "type": "object",
              "properties": {
                "type": {
                  "type": "string"
                },
                "dmaap_info": {
                  "type": "object",
                  "properties": {
                    "topic_url": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "topic_url"
                  ],
                  "additionalProperties": false]
                }
              },
              "required": [
                "type",
                "dmaap_info"
              ],
              "additionalProperties": false
            }
          },
          "required": [
            "dmaap_publisher"
          ],
           "additionalProperties":
false         },
        "streams_subscribes": {
          "type": "object",
          "properties": {
            "dmaap_subscriber": {
              "type": "object",
              "properties": {
                "type": {
                  "type": "string"
                },
                "dmaap_info": {
                  "type": "object",
                  "properties": {
                    "topic_url": {
                      "type": "string"
                    }
                  },
                  "required": [
 
                  "topic_urlrequired": [
                 ],
   "topic_url"
                 "additionalProperties": false]
                }
              },
              "required": [
                "type",
                "dmaap_info"
              ],
               "additionalProperties":
false             }
          },
          "required": [
            "dmaap_subscriber"
          ],
           "additionalProperties": false
        }
      },
      "required": [
        "ric"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "config"
  ],
  "additionalProperties": false
}