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| -rwxr-xr-x | docs/sections/design-components/component-specification/component-type-docker.rst | 2998 |
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diff --git a/docs/sections/design-components/component-specification/component-type-docker.rst b/docs/sections/design-components/component-specification/component-type-docker.rst index 70412c0f..7a0f8f0e 100755 --- a/docs/sections/design-components/component-specification/component-type-docker.rst +++ b/docs/sections/design-components/component-specification/component-type-docker.rst @@ -1,1437 +1,1561 @@ -.. This work is licensed under a Creative Commons Attribution 4.0 International License.
-.. http://creativecommons.org/licenses/by/4.0
-
-
-.. _component_specification:
-
-What is Component Specification?
-================================
-
-This page will discuss categories defined in :any:`component specification schema <dcae-component-schema>` and their usage.
-
-
-Meta Schema Definition
-----------------------
-
-
-The “Meta Schema” implementation defines how component specification
-JSON schemas can be written to define user input. It is itself a JSON
-schema (thus it is a “meta schema”). It requires the name of the
-component entry, component type (either ‘cdap’ or ‘docker’) and a
-description under “self” object. The meta schema version must be
-specified as the value of the “version” key. Then the input schema
-itself is described.
-
-There are four types of schema descriptions objects - jsonschema for
-inline standard JSON Schema definitions of JSON inputs, delimitedschema
-for delimited data input using a JSON description defined by AT&T,
-unstructured for unstructured text, and reference that allows a pointer
-to another artifact for a schema. The reference allows for XML and Protocol Buffer schema,
-but can be used as a pointer to JSON, Delimited Format, and Unstructured
-schemas as well.
-
-.. _metadata:
-
-Component Metadata
-------------------
-
-Metadata refers to the properties found under the ``self`` JSON. This
-group of properties is used to uniquely identify this component
-specification and identify the component that this specification is used
-to capture.
-
-Example:
-
-::
-
- "self": {
- "version": "1.0.0",
- "name": "yourapp.component.kpi_anomaly",
- "description": "Classifies VNF KPI data as anomalous",
- "component_type": "docker"
- },
-
-``self`` Schema:
-
-+-------------+--------+----------------+
-| Property | Type | Description |
-| Name | | |
-+=============+========+================+
-| version | string | *Required*. |
-| | | Semantic |
-| | | version |
-| | | for this |
-| | | specification |
-+-------------+--------+----------------+
-| name | string | *Required*. |
-| | | Full |
-| | | name of |
-| | | this |
-| | | component |
-| | | which is |
-| | | also |
-| | | used as |
-| | | this |
-| | | component's |
-| | | catalog |
-| | | id. |
-+-------------+--------+----------------+
-| description | string | *Required* |
-| | | Human-readable |
-| | | text |
-| | | describing |
-| | | the |
-| | | component |
-| | | and the |
-| | | components |
-| | | functional |
-| | | purpose. |
-+-------------+--------+----------------+
-| component_t\| string | *Required* |
-| ype | | Identify |
-| | | what |
-| | | containe\ |
-| | | rization |
-| | | technolo\ |
-| | | gy |
-| | | this |
-| | | componen\ |
-| | | t |
-| | | uses: |
-| | | *docker* |
-| | | or |
-| | | *cdap*. |
-| | | |
-+-------------+--------+----------------+
-
-.. _interfaces:
-
-Interfaces
-----------
-
-Interfaces are the JSON objects found under the ``streams`` key and the
-``services`` key. These are used to describe the interfaces that the
-component uses and the interfaces that the component provides. The
-description of each interface includes the associated :any:`data
-format <data-formats>`.
-
-Streams
-~~~~~~~
-
-- The ``streams`` JSON is for specifying data produced for consumption
- by other components, and the streams expected to subscribe to that is
- produced by other components. These are “fire and forget” type
- interfaces where the publisher of a stream does not expect or parse a
- response from the subscriber.
-- The term ``stream`` here is abstract and neither refers to “CDAP
- streams” or “DMaaP feeds”. While a stream is very likely a DMaaP
- feed, it could be a direct stream of data being routed via HTTP too.
- It abstractly refers to a sequence of data leaving a publisher.
-- Streams have anonymous publish/subscribe semantics, which decouples
- the production of information from its consumption. Like the component
- specification, the data format specification is represented/validated against this
- `Data Format json schema <https://gerrit.onap.org/r/gitweb?p=dcaegen2/platform/cli.git;a=blob;f=component-json-schemas/data-format/dcae-cli-v1/data-format-schema.json;h=be1568291300305c7adb9a8d244d39f9e6ddadbd;hb=HEAD>`__
-- In general, components are not aware of who they are communicating
- with.
-- Instead, components that are interested in data, subscribe to the
- relevant stream; components that generate data publish to the
- relevant stream.
-- There can be multiple publishers and subscribers to a stream. Streams
- are intended for unidirectional, streaming communication.
-
-Streams interfaces that implement an HTTP endpoint must support POST.
-
-Streams are split into:
-
-+-------------+----+----------+
-| Property | Ty\| Descript\|
-| Name | pe | ion |
-+=============+====+==========+
-| subscribes | JS\| *Require\|
-| | ON | d*. |
-| | li\| List of |
-| | st | all |
-| | | availabl\|
-| | | e |
-| | | stream |
-| | | interfac\|
-| | | es |
-| | | that |
-| | | this |
-| | | componen\|
-| | | t |
-| | | has that |
-| | | can be |
-| | | used for |
-| | | subscrib\|
-| | | ing |
-+-------------+----+----------+
-| publishes | JS\| *Require\|
-| | ON | d*. |
-| | li\| List of |
-| | st | all |
-| | | stream |
-| | | interfac\|
-| | | es |
-| | | that |
-| | | this |
-| | | componen\|
-| | | t |
-| | | will |
-| | | publish |
-| | | onto |
-+-------------+----+----------+
-
-Subscribes
-^^^^^^^^^^
-
-Example:
-
-.. code:: json
-
- "streams": {
- "subscribes": [{
- "format": "dcae.vnf.kpi",
- "version": "1.0.0",
- "route": "/data", // for CDAP this value is not used
- "type": "http"
- }],
- ...
- }
-
-This describes that ``yourapp.component.kpi_anomaly`` exposes an HTTP
-endpoint called ``/data`` which accepts requests that have the data
-format of ``dcae.vnf.kpi`` version ``1.0.0``.
-
-``subscribes`` Schema:
-
-+-------------+----+--------------------+
-| Property | Ty\| Descript\ |
-| Name | pe | ion |
-+=============+====+====================+
-| format | st\| *Require\ |
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | id of |
-| | | the data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\ |
-| | | e |
-+-------------+----+--------------------+
-| version | st\| *Require\ |
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | version |
-| | | of the |
-| | | data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\ |
-| | | e |
-+-------------+----+--------------------+
-| route | st\| *Require\ |
-| | ri\| d |
-| | ng | for HTTP |
-| | | and data |
-| | | router*. |
-| | | The HTTP |
-| | | route |
-| | | that |
-| | | this |
-| | | interfac\ |
-| | | e |
-| | | listens |
-| | | on |
-+-------------+----+--------------------+
-| config_key | st\| *Require\ |
-| | ri\| d \ |
-| | ng | for \ |
-| | | message_router\ |
-| | | and data \ |
-| | | router*. |
-| | | The HTTP |
-| | | route |
-| | | that |
-| | | this |
-| | | interfac\ |
-| | | e |
-| | | listens |
-| | | on |
-+-------------+----+--------------------+
-| type | st\| *Require\ |
-| | ri\| d*. |
-| | ng | Type of |
-| | | stream: |
-| | | ``http`` |
-| | | , |
-| | | ``message_router`` |
-| | | , |
-| | | ``data_router`` |
-+-------------+----+--------------------+
-
-.. _message-router:
-
-Message router
-''''''''''''''
-
-Message router subscribers are http clients rather than http services
-and performs a http a ``GET`` call. Thus, message router subscribers
-description is structured like message router publishers and requires
-``config_key``:
-
-.. code:: json
-
- "streams": {
- "subscribes": [{
- "format": "dcae.some-format",
- "version": "1.0.0",
- "config_key": "some_format_handle",
- "type": "message router"
- }],
- ...
- }
-
-
-.. _data-router:
-
-Data router
-'''''''''''
-
-Data router subscribers are http or https services that handle ``PUT``
-requests from data router. Developers must provide the ``route`` or url
-path/endpoint that is expected to handle data router requests. This will
-be used to construct the delivery url needed to register the subscriber
-to the provisioned feed. Developers must also provide a ``config_key``
-because there is dynamic configuration information associated with the
-feed that the application will need e.g. username and password. See the
-page on :any:`DMaaP connection objects <dmaap-data-router>` for more details on
-the configuration information.
-
-Example (not tied to the larger example):
-
-.. code:: json
-
- "streams": {
- "subscribes": [{
- "config_key": "some-sub-dr",
- "format": "sandbox.platform.any",
- "route": "/identity",
- "type": "data_router",
- "version": "0.1.0"
- }],
- ...
- }
-
-Publishes
-^^^^^^^^^
-
-Example:
-
-.. code:: json
-
- "streams": {
- ...
- "publishes": [{
- "format": "yourapp.format.integerClassification",
- "version": "1.0.0",
- "config_key": "prediction",
- "type": "http"
- }]
- },
-
-This describes that ``yourapp.component.kpi_anomaly`` publishes by making
-POST requests to streams that support the data format
-``yourapp.format.integerClassification`` version ``1.0.0``.
-
-``publishes`` Schema:
-
-+-------------+----+--------------------+
-| Property | Ty\| Descript\ |
-| Name | pe | ion |
-+=============+====+====================+
-| format | st\| *Require\ |
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | id of |
-| | | the data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\ |
-| | | e |
-+-------------+----+--------------------+
-| version | st\| *Require\ |
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | version |
-| | | of the |
-| | | data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\ |
-| | | e |
-+-------------+----+--------------------+
-| config_key | st\| *Require\ |
-| | ri\| d*. |
-| | ng | The JSON |
-| | | key in |
-| | | the |
-| | | generate\ |
-| | | d |
-| | | applicat |
-| | | ion |
-| | | configur\ |
-| | | ation |
-| | | that |
-| | | will be |
-| | | used to |
-| | | pass the |
-| | | downstre\ |
-| | | am |
-| | | componen\ |
-| | | t’s |
-| | | (the |
-| | | subscrib\ |
-| | | er’s) |
-| | | connecti\ |
-| | | on |
-| | | informat\ |
-| | | ion. |
-+-------------+----+--------------------+
-| type | st\| *Require\ |
-| | ri\| d*. |
-| | ng | Type of |
-| | | stream: |
-| | | ``http`` |
-| | | , |
-| | | ``message_router`` |
-| | | , |
-| | | ``data_router`` |
-+-------------+----+--------------------+
-
-.. message-router-1:
-
-Message router
-''''''''''''''
-
-Message router publishers are http clients of DMaap message_router.
-Developers must provide a ``config_key`` because there is dynamic
-configuration information associated with the feed that the application
-needs to receive e.g. topic url, username, password. See the page on
-:any:`DMaaP connection objects <dmaap-message-router>` for more details on
-the configuration information.
-
-Example (not tied to the larger example):
-
-.. code:: json
-
- "streams": {
- ...
- "publishes": [{
- "config_key": "some-pub-mr",
- "format": "sandbox.platform.any",
- "type": "message_router",
- "version": "0.1.0"
- }]
- }
-
-.. data-router-1:
-
-Data router
-'''''''''''
-
-Data router publishers are http clients that make ``PUT`` requests to
-data router. Developers must also provide a ``config_key`` because there
-is dynamic configuration information associated with the feed that the
-application will need to receive e.g. publish url, username, password.
-See the page on :any:`DMaaP connection objects <dmaap-data-router>` for more details on
-the configuration information.
-
-Example (not tied to the larger example):
-
-.. code:: json
-
- "streams": {
- ...
- "publishes": [{
- "config_key": "some-pub-dr",
- "format": "sandbox.platform.any",
- "type": "data_router",
- "version": "0.1.0"
- }]
- }
-
-Quick Reference
-^^^^^^^^^^^^^^^
-
-Refer to this :doc:`Quick Reference <streams-grid>` for a
-comparison of the Streams ‘Publishes’ and ‘Subscribes’ sections.
-
-Services
-~~~~~~~~
-
-- The publish / subscribe model is a very flexible communication
- paradigm, but its many-to-many one-way transport is not appropriate
- for RPC request / reply interactions, which are often required in a
- distributed system.
-- Request / reply is done via a Service, which is defined by a pair of
- messages: one for the request and one for the reply.
-
-Services are split into:
-
-+-------------+----+----------+
-| Property | Ty\| Descript\|
-| Name | pe | ion |
-+=============+====+==========+
-| calls | JS\| *Require\|
-| | ON | d*. |
-| | li\| List of |
-| | st | all |
-| | | service |
-| | | interfac\|
-| | | es |
-| | | that |
-| | | this |
-| | | componen\|
-| | | t |
-| | | will |
-| | | call |
-+-------------+----+----------+
-| provides | JS\| *Require\|
-| | ON | d*. |
-| | li\| List of |
-| | st | all |
-| | | service |
-| | | interfac\|
-| | | es |
-| | | that |
-| | | this |
-| | | componen\|
-| | | t |
-| | | exposes |
-| | | and |
-| | | provides |
-+-------------+----+----------+
-
-Calls
-^^^^^
-
-The JSON ``services/calls`` is for specifying that the component relies
-on an HTTP(S) service—the component sends that service an HTTP request,
-and that service responds with an HTTP reply. An example of this is how
-string matching (SM) depends on the AAI Broker. SM performs a
-synchronous REST call to the AAI broker, providing it the VMNAME of the
-VNF, and the AAI Broker responds with additional details about the VNF.
-This dependency is expressed via ``services/calls``. In contrast, the
-output of string matching (the alerts it computes) is sent directly to
-policy as a fire-and-forget interface, so that is an example of a
-``stream``.
-
-Example:
-
-.. code:: json
-
- "services": {
- "calls": [{
- "config_key": "vnf-db",
- "request": {
- "format": "dcae.vnf.meta",
- "version": "1.0.0"
- },
- "response": {
- "format": "dcae.vnf.kpi",
- "version": "1.0.0"
- }
- }],
- ...
- }
-
-This describes that ``yourapp.component.kpi_anomaly`` will make HTTP
-calls to a downstream component that accepts requests of data format
-``dcae.vnf.meta`` version ``1.0.0`` and is expecting the response to be
-``dcae.vnf.kpi`` version ``1.0.0``.
-
-``calls`` Schema:
-
-+-------------+----+----------+
-| Property | Ty\| Descript\|
-| Name | pe | ion |
-+=============+====+==========+
-| request | JS\| *Require\|
-| | ON | d*. |
-| | ob\| Descript\|
-| | je\| ion |
-| | ct | of the |
-| | | expected |
-| | | request |
-| | | for this |
-| | | downstre\|
-| | | am |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-| response | JS\| *Require\|
-| | ON | d*. |
-| | ob\| Descript\|
-| | je\| ion |
-| | ct | of the |
-| | | expected |
-| | | response |
-| | | for this |
-| | | downstre\|
-| | | am |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-| config_key | st\| *Require\|
-| | ri\| d*. |
-| | ng | The JSON |
-| | | key in |
-| | | the |
-| | | generate\|
-| | | d |
-| | | applicat |
-| | | ion |
-| | | configur\|
-| | | ation |
-| | | that |
-| | | will be |
-| | | used to |
-| | | pass the |
-| | | downstre\|
-| | | am |
-| | | componen |
-| | | t |
-| | | connecti\|
-| | | on |
-| | | informat\|
-| | | ion. |
-+-------------+----+----------+
-
-The JSON object schema for both ``request`` and ``response``:
-
-+-------------+----+----------+
-| Property | Ty\| Descript\|
-| Name | pe | ion |
-+=============+====+==========+
-| format | st\| *Require\|
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | id of |
-| | | the data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-| version | st\| *Require\|
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | version |
-| | | of the |
-| | | data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-
-Provides
-^^^^^^^^
-
-Example:
-
-.. code:: json
-
- "services": {
- ...
- "provides": [{
- "route": "/score-vnf",
- "request": {
- "format": "dcae.vnf.meta",
- "version": "1.0.0"
- },
- "response": {
- "format": "yourapp.format.integerClassification",
- "version": "1.0.0"
- }
- }]
- },
-
-This describes that ``yourapp.component.kpi_anomaly`` provides a service
-interface and it is exposed on the ``/score-vnf`` HTTP endpoint. The
-endpoint accepts requests that have the data format ``dcae.vnf.meta``
-version ``1.0.0`` and gives back a response of
-``yourapp.format.integerClassification`` version ``1.0.0``.
-
-``provides`` Schema for a Docker component:
-
-+-------------+----+----------+
-| Property | Ty\| Descript\|
-| Name | pe | ion |
-+=============+====+==========+
-| request | JS\| *Require\|
-| | ON | d*. |
-| | ob\| Descript\|
-| | je\| ion |
-| | ct | of the |
-| | | expected |
-| | | request |
-| | | for this |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-| response | JS\| *Require\|
-| | ON | d*. |
-| | ob\| Descript\|
-| | je\| ion |
-| | ct | of the |
-| | | expected |
-| | | response |
-| | | for this |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-| route | st\| *Require\|
-| | ri\| d*. |
-| | ng | The HTTP |
-| | | route |
-| | | that |
-| | | this |
-| | | interfac\|
-| | | e |
-| | | listens |
-| | | on |
-+-------------+----+----------+
-
-The JSON object schema for both ``request`` and ``response``:
-
-+-------------+----+----------+
-| Property | Ty\| Descript\|
-| Name | pe | ion |
-+=============+====+==========+
-| format | st\| *Require\|
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | id of |
-| | | the data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-| version | st\| *Require\|
-| | ri\| d*. |
-| | ng | Data |
-| | | format |
-| | | version |
-| | | of the |
-| | | data |
-| | | format |
-| | | that is |
-| | | used by |
-| | | this |
-| | | interfac\|
-| | | e |
-+-------------+----+----------+
-
-Note, for CDAP, there is a slight variation due to the way CDAP exposes
-services:
-
-::
-
- "provides":[ // note this is a list of JSON
- {
- "request":{ ...},
- "response":{ ...},
- "service_name":"name CDAP service",
- "service_endpoint":"greet", // E.g the URL is /services/service_name/methods/service_endpoint
- "verb":"GET" // GET, PUT, or POST
- }
- ]
-
-``provides`` Schema for a CDAP component:
-
-+-------------+----+-----------+
-| Property | Ty\| Descript\ |
-| Name | pe | ion |
-+=============+====+===========+
-| request | JS\| *Require\ |
-| | ON | d*. |
-| | ob\| Descript\ |
-| | je\| ion |
-| | ct | of the |
-| | | expected |
-| | | request |
-| | | data |
-| | | format |
-| | | for this |
-| | | interfac\ |
-| | | e |
-+-------------+----+-----------+
-| response | JS\| *Require\ |
-| | ON | d*. |
-| | ob\| Descript\ |
-| | je\| ion |
-| | ct | of the |
-| | | expected |
-| | | response |
-| | | for this |
-| | | interfac\ |
-| | | e |
-+-------------+----+-----------+
-| service_nam\| st\| *Require\ |
-| e | ri\| d*. |
-| | ng | The CDAP |
-| | | service |
-| | | name (eg |
-| | | “Greetin\ |
-| | | g”) |
-+-------------+----+-----------+
-| service_end | st\| *Require\ |
-| point | ri\| d*. |
-| | ng | The CDAP |
-| | | service |
-| | | endpoint |
-| | | for this |
-| | | service_n\|
-| | | ame |
-| | | (eg |
-| | | “/greet” |
-| | | ) |
-+-------------+----+-----------+
-| verb | st\| *Require\ |
-| | ri\| d*. |
-| | ng | ‘GET’, |
-| | | ‘PUT’ or |
-| | | ‘POST’ |
-+-------------+----+-----------+
-
-.. _common-specification-parameters:
-
-Parameters
-----------
-
-``parameters`` is where to specify the component’s application
-configuration parameters that are not connection information.
-
-+---------------+------------+----------------------------------+
-| Property Name | Type | Description |
-+===============+============+==================================+
-| parameters | JSON array | Each entry is a parameter object |
-+---------------+------------+----------------------------------+
-
-Parameter object has the following available properties:
-
-+--------------+----+----------+------+
-| Property | Ty\| Descript\| Defa\|
-| Name | pe | ion | ult |
-+==============+====+==========+======+
-| name | st\| *Require\| |
-| | ri\| d*. | |
-| | ng | The | |
-| | | property | |
-| | | name | |
-| | | that | |
-| | | will be | |
-| | | used as | |
-| | | the key | |
-| | | in the | |
-| | | generate\| |
-| | | d | |
-| | | config | |
-+--------------+----+----------+------+
-| value | an\| *Require\| |
-| | y | d*. | |
-| | | The | |
-| | | default | |
-| | | value | |
-| | | for the | |
-| | | given | |
-| | | paramete\| |
-| | | r | |
-+--------------+----+----------+------+
-| description | st\| *Require\| |
-| | ri\| d*. | |
-| | ng | Human-re\| |
-| | | adable | |
-| | | text | |
-| | | describi\| |
-| | | ng | |
-| | | the | |
-| | | paramete\| |
-| | | r | |
-| | | like | |
-| | | what its | |
-| | | for | |
-+--------------+----+----------+------+
-| type | st\| The | |
-| | ri\| required | |
-| | ng | data | |
-| | | type for | |
-| | | the | |
-| | | paramete\| |
-| | | r | |
-+--------------+----+----------+------+
-| required | bo\| An | true |
-| | ol\| optional | |
-| | ea\| key that | |
-| | n | declares | |
-| | | a | |
-| | | paramete\| |
-| | | r | |
-| | | as | |
-| | | required | |
-| | | (true) | |
-| | | or not | |
-| | | (false) | |
-+--------------+----+----------+------+
-| constraints | ar\| The | |
-| | ra\| optional | |
-| | y | list of | |
-| | | sequence | |
-| | | d | |
-| | | constrai\| |
-| | | nt | |
-| | | clauses | |
-| | | for the | |
-| | | paramete\| |
-| | | r. | |
-| | | See | |
-| | | below | |
-+--------------+----+----------+------+
-| entry_schem\ | st\| The | |
-| a | ri\| optional | |
-| | ng | key that | |
-| | | is used | |
-| | | to | |
-| | | declare | |
-| | | the name | |
-| | | of the | |
-| | | Datatype | |
-| | | definiti\| |
-| | | on | |
-| | | for | |
-| | | entries | |
-| | | of set | |
-| | | types | |
-| | | such as | |
-| | | the | |
-| | | TOSCA | |
-| | | ‘list’ | |
-| | | or | |
-| | | ‘map’. | |
-| | | Only 1 | |
-| | | level is | |
-| | | supporte\| |
-| | | d | |
-| | | at this | |
-| | | time | |
-+--------------+----+----------+------+
-| designer_ed\ | bo\| An | |
-| itable | ol\| optional | |
-| | ea\| key that | |
-| | n | declares | |
-| | | a | |
-| | | paramete\| |
-| | | r | |
-| | | to be | |
-| | | editable | |
-| | | by | |
-| | | designer | |
-| | | (true) | |
-| | | or not | |
-| | | (false) | |
-+--------------+----+----------+------+
-| sourced_at_d\| bo\| An | |
-| eployment | ol\| optional | |
-| | ea\| key that | |
-| | n | declares | |
-| | | a | |
-| | | paramete\| |
-| | | r’s | |
-| | | value to | |
-| | | be | |
-| | | assigned | |
-| | | at | |
-| | | deployme\| |
-| | | nt | |
-| | | time | |
-| | | (true) | |
-+--------------+----+----------+------+
-| policy_edit\ | bo\| An | |
-| able | ol\| optional | |
-| | ea\| key that | |
-| | n | declares | |
-| | | a | |
-| | | paramete\| |
-| | | r | |
-| | | to be | |
-| | | editable | |
-| | | by | |
-| | | policy | |
-| | | (true) | |
-| | | or not | |
-| | | (false) | |
-+--------------+----+----------+------+
-| policy_sche\ | ar\| The | |
-| ma | ra\| optional | |
-| | y | list of | |
-| | | schema | |
-| | | definiti\| |
-| | | ons | |
-| | | used for | |
-| | | policy. | |
-| | | See | |
-| | | below | |
-+--------------+----+----------+------+
-
-Example:
-
-.. code:: json
-
- "parameters": [
- {
- "name": "threshold",
- "value": 0.75,
- "description": "Probability threshold to exceed to be anomalous"
- }
- ]
-
-Many of the parameter properties have been copied from TOSCA model
-property definitions and are to be used for service design composition
-and policy creation. See `section 3.5.8 *Property
-definition* <http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.1/TOSCA-Simple-Profile-YAML-v1.1.html>`__.
-
-The property ``constraints`` is a list of objects where each constraint
-object:
-
-+--------------+----+----------+
-| Property | Ty\| Descript\|
-| Name | pe | ion |
-+==============+====+==========+
-| equal | | Constrai\|
-| | | ns |
-| | | a |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value |
-| | | equal to |
-| | | (‘=’) |
-| | | the |
-| | | value |
-| | | declared |
-+--------------+----+----------+
-| greater_tha\ | nu\| Constrai\|
-| n | mb\| ns |
-| | er | a |
-| | | property |
-| | | or |
-| | | paramete |
-| | | r |
-| | | to a |
-| | | value |
-| | | greater |
-| | | than |
-| | | (‘>’) |
-| | | the |
-| | | value |
-| | | declared |
-+--------------+----+----------+
-| greater_or_e\| nu\| Constrai\|
-| qual | mb\| ns |
-| | er | a |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value |
-| | | greater |
-| | | than or |
-| | | equal to |
-| | | (‘>=’) |
-| | | the |
-| | | value |
-| | | declared |
-+--------------+----+----------+
-| less_than | nu\| Constrai\|
-| | mb\| ns |
-| | er | a |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value |
-| | | less |
-| | | than |
-| | | (‘<’) |
-| | | the |
-| | | value |
-| | | declared |
-+--------------+----+----------+
-| less_or_equ\ | nu\| Constrai\|
-| al | mb\| ns |
-| | er | a |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value |
-| | | less |
-| | | than or |
-| | | equal to |
-| | | (‘<=’) |
-| | | the |
-| | | value |
-| | | declared |
-+--------------+----+----------+
-| valid_value\ | ar\| Constrai\|
-| s | ra\| ns |
-| | y | a |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value |
-| | | that is |
-| | | in the |
-| | | list of |
-| | | declared |
-| | | values |
-+--------------+----+----------+
-| length | nu\| Constrai\|
-| | mb\| ns |
-| | er | the |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value of |
-| | | a given |
-| | | length |
-+--------------+----+----------+
-| min_length | nu\| Constrai\|
-| | mb\| ns |
-| | er | the |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value to |
-| | | a |
-| | | minimum |
-| | | length |
-+--------------+----+----------+
-| max_length | nu\| Constrai\|
-| | mb\| ns |
-| | er | the |
-| | | property |
-| | | or |
-| | | paramete\|
-| | | r |
-| | | to a |
-| | | value to |
-| | | a |
-| | | maximum |
-| | | length |
-+--------------+----+----------+
-
-``threshold`` is the configuration parameter and will get set to 0.75
-when the configuration gets generated.
-
-The property ``policy_schema`` is a list of objects where each
-policy_schema object:
-
-+-------------+----+----------+------+
-| Property | Ty\| Descript\| Defa\|
-| Name | pe | ion | ult |
-+=============+====+==========+======+
-| name | st\| *Require\| |
-| | ri\| d*. | |
-| | ng | paramete\| |
-| | | r | |
-| | | name | |
-+-------------+----+----------+------+
-| value | st\| default | |
-| | ri\| value | |
-| | ng | for the | |
-| | | paramete\| |
-| | | r | |
-+-------------+----+----------+------+
-| description | st\| paramete\| |
-| | ri\| r | |
-| | ng | descript\| |
-| | | ion | |
-+-------------+----+----------+------+
-| type | en\| *Require\| |
-| | um | d*. | |
-| | | data | |
-| | | type of | |
-| | | the | |
-| | | paramete\| |
-| | | r, | |
-| | | ‘string’ | |
-| | | , | |
-| | | ‘number’ | |
-| | | , | |
-| | | ‘boolean | |
-| | | ’, | |
-| | | ‘datetim\| |
-| | | e’, | |
-| | | ‘list’, | |
-| | | or ‘map’ | |
-+-------------+----+----------+------+
-| required | bo\| is | true |
-| | ol\| paramete\| |
-| | ea\| r | |
-| | n | required | |
-| | | or not? | |
-+-------------+----+----------+------+
-| constraints | ar\| The | |
-| | ra\| optional | |
-| | y | list of | |
-| | | sequence\| |
-| | | d | |
-| | | constrai\| |
-| | | nt | |
-| | | clauses | |
-| | | for the | |
-| | | paramete\| |
-| | | r. | |
-| | | See | |
-| | | above | |
-+-------------+----+----------+------+
-| entry_schem\| st\| The | |
-| a | ri\| optional | |
-| | ng | key that | |
-| | | is used | |
-| | | to | |
-| | | declare | |
-| | | the name | |
-| | | of the | |
-| | | Datatype | |
-| | | definiti\| |
-| | | on | |
-| | | for | |
-| | | certain | |
-| | | types. | |
-| | | entry_sc\| |
-| | | hema | |
-| | | must be | |
-| | | defined | |
-| | | when the | |
-| | | type is | |
-| | | either | |
-| | | list or | |
-| | | map. If | |
-| | | the type | |
-| | | is list | |
-| | | and the | |
-| | | entry | |
-| | | type is | |
-| | | a simple | |
-| | | type | |
-| | | (string, | |
-| | | number, | |
-| | | bookean, | |
-| | | datetime | |
-| | | ), | |
-| | | follow | |
-| | | with an | |
-| | | string | |
-| | | to | |
-| | | describe | |
-| | | the | |
-| | | entry | |
-+-------------+----+----------+------+
-| | If | | |
-| | th\| | |
-| | e | | |
-| | ty\| | |
-| | pe | | |
-| | is | | |
-| | li\| | |
-| | st | | |
-| | an\| | |
-| | d | | |
-| | th\| | |
-| | e | | |
-| | en\| | |
-| | tr\| | |
-| | y | | |
-| | ty\| | |
-| | pe | | |
-| | is | | |
-| | a | | |
-| | ma\| | |
-| | p, | | |
-| | fo\| | |
-| | ll\| | |
-| | ow | | |
-| | wi\| | |
-| | th | | |
-| | an | | |
-| | ar\| | |
-| | ra\| | |
-| | y | | |
-| | to | | |
-| | de\| | |
-| | sc\| | |
-| | ri\| | |
-| | be | | |
-| | th\| | |
-| | e | | |
-| | ke\| | |
-| | ys | | |
-| | fo\| | |
-| | r | | |
-| | th\| | |
-| | e | | |
-| | en\| | |
-| | tr\| | |
-| | y | | |
-| | ma\| | |
-| | p | | |
-+-------------+----+----------+------+
-| | If | | |
-| | th\| | |
-| | e | | |
-| | ty\| | |
-| | pe | | |
-| | is | | |
-| | li\| | |
-| | st | | |
-| | an\| | |
-| | d | | |
-| | th\| | |
-| | e | | |
-| | en\| | |
-| | tr\| | |
-| | y | | |
-| | ty\| | |
-| | pe | | |
-| | is | | |
-| | a | | |
-| | li\| | |
-| | st | | |
-| | , | | |
-| | th\| | |
-| | at | | |
-| | is | | |
-| | no\| | |
-| | t | | |
-| | cu\| | |
-| | rr\| | |
-| | en\| | |
-| | tl\| | |
-| | y | | |
-| | su\| | |
-| | pp\| | |
-| | or\| | |
-| | te\| | |
-| | d \| | |
-+-------------+----+----------+------+
-| | If | | |
-| | th\| | |
-| | e | | |
-| | ty\| | |
-| | pe | | |
-| | is | | |
-| | ma\| | |
-| | p, | | |
-| | fo\| | |
-| | ll\| | |
-| | ow | | |
-| | wi\| | |
-| | th | | |
-| | an | | |
-| | ar\| | |
-| | ay | | |
-| | to | | |
-| | de\| | |
-| | sc\| | |
-| | ri\| | |
-| | be | | |
-| | th\| | |
-| | e | | |
-| | ke\| | |
-| | ys | | |
-| | fo\| | |
-| | r | | |
-| | th\| | |
-| | e | | |
-| | ma\| | |
-| | p | | |
-+-------------+----+----------+------+
-
-
-.. _artifacts:
-
-Artifacts
----------
-
-``artifacts`` contains a list of artifacts associated with this
-component. For Docker, this is the full path (including the registry) to
-the Docker image. For CDAP, this is the full path to the CDAP jar.
-
-+---------------+------------+---------------------------------+
-| Property Name | Type | Description |
-+===============+============+=================================+
-| artifacts | JSON array | Each entry is a artifact object |
-+---------------+------------+---------------------------------+
-
-``artifact`` Schema:
-
-+---------------+--------+--------------------------------------------+
-| Property Name | Type | Description |
-+===============+========+============================================+
-| uri | string | *Required*. Uri to the artifact, full path |
-+---------------+--------+--------------------------------------------+
-| type | string | *Required*. ``docker image`` or ``jar`` |
-+---------------+--------+--------------------------------------------+
-
-.. _auxilary:
-
-Auxilary
---------
-
-
-Health check
-~~~~~~~~~~~~
-
-Component developers are required to provide a way for the platform to
-periodically check the health of their running components. The
-details of the definition used by your component is to be provided
-through the :any:`Docker auxiliary specification <docker-auxiliary-details>`.
-
-
+.. This work is licensed under a Creative Commons Attribution 4.0 International License. +.. http://creativecommons.org/licenses/by/4.0 + + +.. _component_specification: + +What is Component Specification? +================================ + +This page will discuss categories defined in :any:`component specification schema <dcae-component-schema>` and their usage. + + +Meta Schema Definition +---------------------- + + +The “Meta Schema” implementation defines how component specification +JSON schemas can be written to define user input. It is itself a JSON +schema (thus it is a “meta schema”). It requires the name of the +component entry, component type (either ‘cdap’ or ‘docker’) and a +description under “self” object. The meta schema version must be +specified as the value of the “version” key. Then the input schema +itself is described. + +There are four types of schema descriptions objects - jsonschema for +inline standard JSON Schema definitions of JSON inputs, delimitedschema +for delimited data input using a JSON description defined by AT&T, +unstructured for unstructured text, and reference that allows a pointer +to another artifact for a schema. The reference allows for XML and Protocol Buffer schema, +but can be used as a pointer to JSON, Delimited Format, and Unstructured +schemas as well. + +.. _metadata: + +Component Metadata +------------------ + +Metadata refers to the properties found under the ``self`` JSON. This +group of properties is used to uniquely identify this component +specification and identify the component that this specification is used +to capture. + +Example: + +:: + + "self": { + "version": "1.0.0", + "name": "yourapp.component.kpi_anomaly", + "description": "Classifies VNF KPI data as anomalous", + "component_type": "docker" + }, + +``self`` Schema: + ++-------------+--------+----------------+ +| Property | Type | Description | +| Name | | | ++=============+========+================+ +| version | string | *Required*. | +| | | Semantic | +| | | version | +| | | for this | +| | | specification | ++-------------+--------+----------------+ +| name | string | *Required*. | +| | | Full | +| | | name of | +| | | this | +| | | component | +| | | which is | +| | | also | +| | | used as | +| | | this | +| | | component's | +| | | catalog | +| | | id. | ++-------------+--------+----------------+ +| description | string | *Required* | +| | | Human-readable | +| | | text | +| | | describing | +| | | the | +| | | component | +| | | and the | +| | | components | +| | | functional | +| | | purpose. | ++-------------+--------+----------------+ +| component_t\| string | *Required* | +| ype | | Identify | +| | | what | +| | | containe\ | +| | | rization | +| | | technolo\ | +| | | gy | +| | | this | +| | | componen\ | +| | | t | +| | | uses: | +| | | *docker* | +| | | or | +| | | *cdap*. | +| | | | ++-------------+--------+----------------+ + +.. _interfaces: + +Interfaces +---------- + +Interfaces are the JSON objects found under the ``streams`` key and the +``services`` key. These are used to describe the interfaces that the +component uses and the interfaces that the component provides. The +description of each interface includes the associated :any:`data +format <data-formats>`. + +Streams +~~~~~~~ + +- The ``streams`` JSON is for specifying data produced for consumption + by other components, and the streams expected to subscribe to that is + produced by other components. These are “fire and forget” type + interfaces where the publisher of a stream does not expect or parse a + response from the subscriber. +- The term ``stream`` here is abstract and neither refers to “CDAP + streams” or “DMaaP feeds”. While a stream is very likely a DMaaP + feed, it could be a direct stream of data being routed via HTTP too. + It abstractly refers to a sequence of data leaving a publisher. +- Streams have anonymous publish/subscribe semantics, which decouples + the production of information from its consumption. Like the component + specification, the data format specification is represented/validated against this + `Data Format json schema <https://gerrit.onap.org/r/gitweb?p=dcaegen2/platform/cli.git;a=blob;f=component-json-schemas/data-format/dcae-cli-v1/data-format-schema.json;h=be1568291300305c7adb9a8d244d39f9e6ddadbd;hb=HEAD>`__ +- In general, components are not aware of who they are communicating + with. +- Instead, components that are interested in data, subscribe to the + relevant stream; components that generate data publish to the + relevant stream. +- There can be multiple publishers and subscribers to a stream. Streams + are intended for unidirectional, streaming communication. + +Streams interfaces that implement an HTTP endpoint must support POST. + +Streams are split into: + ++-------------+----+----------+ +| Property | Ty\| Descript\| +| Name | pe | ion | ++=============+====+==========+ +| subscribes | JS\| *Require\| +| | ON | d*. | +| | li\| List of | +| | st | all | +| | | availabl\| +| | | e | +| | | stream | +| | | interfac\| +| | | es | +| | | that | +| | | this | +| | | componen\| +| | | t | +| | | has that | +| | | can be | +| | | used for | +| | | subscrib\| +| | | ing | ++-------------+----+----------+ +| publishes | JS\| *Require\| +| | ON | d*. | +| | li\| List of | +| | st | all | +| | | stream | +| | | interfac\| +| | | es | +| | | that | +| | | this | +| | | componen\| +| | | t | +| | | will | +| | | publish | +| | | onto | ++-------------+----+----------+ + +Subscribes +^^^^^^^^^^ + +Example: + +.. code:: json + + "streams": { + "subscribes": [{ + "format": "dcae.vnf.kpi", + "version": "1.0.0", + "route": "/data", // for CDAP this value is not used + "type": "http" + }], + ... + } + +This describes that ``yourapp.component.kpi_anomaly`` exposes an HTTP +endpoint called ``/data`` which accepts requests that have the data +format of ``dcae.vnf.kpi`` version ``1.0.0``. + +``subscribes`` Schema: + ++-------------+----+--------------------+ +| Property | Ty\| Descript\ | +| Name | pe | ion | ++=============+====+====================+ +| format | st\| *Require\ | +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | id of | +| | | the data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\ | +| | | e | ++-------------+----+--------------------+ +| version | st\| *Require\ | +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | version | +| | | of the | +| | | data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\ | +| | | e | ++-------------+----+--------------------+ +| route | st\| *Require\ | +| | ri\| d | +| | ng | for HTTP | +| | | and data | +| | | router*. | +| | | The HTTP | +| | | route | +| | | that | +| | | this | +| | | interfac\ | +| | | e | +| | | listens | +| | | on | ++-------------+----+--------------------+ +| config_key | st\| *Require\ | +| | ri\| d \ | +| | ng | for \ | +| | | message_router\ | +| | | and data \ | +| | | router*. | +| | | The HTTP | +| | | route | +| | | that | +| | | this | +| | | interfac\ | +| | | e | +| | | listens | +| | | on | ++-------------+----+--------------------+ +| type | st\| *Require\ | +| | ri\| d*. | +| | ng | Type of | +| | | stream: | +| | | ``http`` | +| | | , | +| | | ``message_router`` | +| | | , | +| | | ``data_router`` | ++-------------+----+--------------------+ + +.. _message-router: + +Message router +'''''''''''''' + +Message router subscribers are http clients rather than http services +and performs a http a ``GET`` call. Thus, message router subscribers +description is structured like message router publishers and requires +``config_key``: + +.. code:: json + + "streams": { + "subscribes": [{ + "format": "dcae.some-format", + "version": "1.0.0", + "config_key": "some_format_handle", + "type": "message router" + }], + ... + } + + +.. _data-router: + +Data router +''''''''''' + +Data router subscribers are http or https services that handle ``PUT`` +requests from data router. Developers must provide the ``route`` or url +path/endpoint that is expected to handle data router requests. This will +be used to construct the delivery url needed to register the subscriber +to the provisioned feed. Developers must also provide a ``config_key`` +because there is dynamic configuration information associated with the +feed that the application will need e.g. username and password. See the +page on :any:`DMaaP connection objects <dmaap-data-router>` for more details on +the configuration information. + +Example (not tied to the larger example): + +.. code:: json + + "streams": { + "subscribes": [{ + "config_key": "some-sub-dr", + "format": "sandbox.platform.any", + "route": "/identity", + "type": "data_router", + "version": "0.1.0" + }], + ... + } + +Publishes +^^^^^^^^^ + +Example: + +.. code:: json + + "streams": { + ... + "publishes": [{ + "format": "yourapp.format.integerClassification", + "version": "1.0.0", + "config_key": "prediction", + "type": "http" + }] + }, + +This describes that ``yourapp.component.kpi_anomaly`` publishes by making +POST requests to streams that support the data format +``yourapp.format.integerClassification`` version ``1.0.0``. + +``publishes`` Schema: + ++-------------+----+--------------------+ +| Property | Ty\| Descript\ | +| Name | pe | ion | ++=============+====+====================+ +| format | st\| *Require\ | +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | id of | +| | | the data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\ | +| | | e | ++-------------+----+--------------------+ +| version | st\| *Require\ | +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | version | +| | | of the | +| | | data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\ | +| | | e | ++-------------+----+--------------------+ +| config_key | st\| *Require\ | +| | ri\| d*. | +| | ng | The JSON | +| | | key in | +| | | the | +| | | generate\ | +| | | d | +| | | applicat | +| | | ion | +| | | configur\ | +| | | ation | +| | | that | +| | | will be | +| | | used to | +| | | pass the | +| | | downstre\ | +| | | am | +| | | componen\ | +| | | t’s | +| | | (the | +| | | subscrib\ | +| | | er’s) | +| | | connecti\ | +| | | on | +| | | informat\ | +| | | ion. | ++-------------+----+--------------------+ +| type | st\| *Require\ | +| | ri\| d*. | +| | ng | Type of | +| | | stream: | +| | | ``http`` | +| | | , | +| | | ``message_router`` | +| | | , | +| | | ``data_router`` | ++-------------+----+--------------------+ + +.. message-router-1: + +Message router +'''''''''''''' + +Message router publishers are http clients of DMaap message_router. +Developers must provide a ``config_key`` because there is dynamic +configuration information associated with the feed that the application +needs to receive e.g. topic url, username, password. See the page on +:any:`DMaaP connection objects <dmaap-message-router>` for more details on +the configuration information. + +Example (not tied to the larger example): + +.. code:: json + + "streams": { + ... + "publishes": [{ + "config_key": "some-pub-mr", + "format": "sandbox.platform.any", + "type": "message_router", + "version": "0.1.0" + }] + } + +.. data-router-1: + +Data router +''''''''''' + +Data router publishers are http clients that make ``PUT`` requests to +data router. Developers must also provide a ``config_key`` because there +is dynamic configuration information associated with the feed that the +application will need to receive e.g. publish url, username, password. +See the page on :any:`DMaaP connection objects <dmaap-data-router>` for more details on +the configuration information. + +Example (not tied to the larger example): + +.. code:: json + + "streams": { + ... + "publishes": [{ + "config_key": "some-pub-dr", + "format": "sandbox.platform.any", + "type": "data_router", + "version": "0.1.0" + }] + } + +Quick Reference +^^^^^^^^^^^^^^^ + +Refer to this :doc:`Quick Reference <streams-grid>` for a +comparison of the Streams ‘Publishes’ and ‘Subscribes’ sections. + +Services +~~~~~~~~ + +- The publish / subscribe model is a very flexible communication + paradigm, but its many-to-many one-way transport is not appropriate + for RPC request / reply interactions, which are often required in a + distributed system. +- Request / reply is done via a Service, which is defined by a pair of + messages: one for the request and one for the reply. + +Services are split into: + ++-------------+----+----------+ +| Property | Ty\| Descript\| +| Name | pe | ion | ++=============+====+==========+ +| calls | JS\| *Require\| +| | ON | d*. | +| | li\| List of | +| | st | all | +| | | service | +| | | interfac\| +| | | es | +| | | that | +| | | this | +| | | componen\| +| | | t | +| | | will | +| | | call | ++-------------+----+----------+ +| provides | JS\| *Require\| +| | ON | d*. | +| | li\| List of | +| | st | all | +| | | service | +| | | interfac\| +| | | es | +| | | that | +| | | this | +| | | componen\| +| | | t | +| | | exposes | +| | | and | +| | | provides | ++-------------+----+----------+ + +Calls +^^^^^ + +The JSON ``services/calls`` is for specifying that the component relies +on an HTTP(S) service—the component sends that service an HTTP request, +and that service responds with an HTTP reply. An example of this is how +string matching (SM) depends on the AAI Broker. SM performs a +synchronous REST call to the AAI broker, providing it the VMNAME of the +VNF, and the AAI Broker responds with additional details about the VNF. +This dependency is expressed via ``services/calls``. In contrast, the +output of string matching (the alerts it computes) is sent directly to +policy as a fire-and-forget interface, so that is an example of a +``stream``. + +Example: + +.. code:: json + + "services": { + "calls": [{ + "config_key": "vnf-db", + "request": { + "format": "dcae.vnf.meta", + "version": "1.0.0" + }, + "response": { + "format": "dcae.vnf.kpi", + "version": "1.0.0" + } + }], + ... + } + +This describes that ``yourapp.component.kpi_anomaly`` will make HTTP +calls to a downstream component that accepts requests of data format +``dcae.vnf.meta`` version ``1.0.0`` and is expecting the response to be +``dcae.vnf.kpi`` version ``1.0.0``. + +``calls`` Schema: + ++-------------+----+----------+ +| Property | Ty\| Descript\| +| Name | pe | ion | ++=============+====+==========+ +| request | JS\| *Require\| +| | ON | d*. | +| | ob\| Descript\| +| | je\| ion | +| | ct | of the | +| | | expected | +| | | request | +| | | for this | +| | | downstre\| +| | | am | +| | | interfac\| +| | | e | ++-------------+----+----------+ +| response | JS\| *Require\| +| | ON | d*. | +| | ob\| Descript\| +| | je\| ion | +| | ct | of the | +| | | expected | +| | | response | +| | | for this | +| | | downstre\| +| | | am | +| | | interfac\| +| | | e | ++-------------+----+----------+ +| config_key | st\| *Require\| +| | ri\| d*. | +| | ng | The JSON | +| | | key in | +| | | the | +| | | generate\| +| | | d | +| | | applicat | +| | | ion | +| | | configur\| +| | | ation | +| | | that | +| | | will be | +| | | used to | +| | | pass the | +| | | downstre\| +| | | am | +| | | componen | +| | | t | +| | | connecti\| +| | | on | +| | | informat\| +| | | ion. | ++-------------+----+----------+ + +The JSON object schema for both ``request`` and ``response``: + ++-------------+----+----------+ +| Property | Ty\| Descript\| +| Name | pe | ion | ++=============+====+==========+ +| format | st\| *Require\| +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | id of | +| | | the data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\| +| | | e | ++-------------+----+----------+ +| version | st\| *Require\| +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | version | +| | | of the | +| | | data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\| +| | | e | ++-------------+----+----------+ + +Provides +^^^^^^^^ + +Example: + +.. code:: json + + "services": { + ... + "provides": [{ + "route": "/score-vnf", + "request": { + "format": "dcae.vnf.meta", + "version": "1.0.0" + }, + "response": { + "format": "yourapp.format.integerClassification", + "version": "1.0.0" + } + }] + }, + +This describes that ``yourapp.component.kpi_anomaly`` provides a service +interface and it is exposed on the ``/score-vnf`` HTTP endpoint. The +endpoint accepts requests that have the data format ``dcae.vnf.meta`` +version ``1.0.0`` and gives back a response of +``yourapp.format.integerClassification`` version ``1.0.0``. + +``provides`` Schema for a Docker component: + ++-------------+----+----------+ +| Property | Ty\| Descript\| +| Name | pe | ion | ++=============+====+==========+ +| request | JS\| *Require\| +| | ON | d*. | +| | ob\| Descript\| +| | je\| ion | +| | ct | of the | +| | | expected | +| | | request | +| | | for this | +| | | interfac\| +| | | e | ++-------------+----+----------+ +| response | JS\| *Require\| +| | ON | d*. | +| | ob\| Descript\| +| | je\| ion | +| | ct | of the | +| | | expected | +| | | response | +| | | for this | +| | | interfac\| +| | | e | ++-------------+----+----------+ +| route | st\| *Require\| +| | ri\| d*. | +| | ng | The HTTP | +| | | route | +| | | that | +| | | this | +| | | interfac\| +| | | e | +| | | listens | +| | | on | ++-------------+----+----------+ + +The JSON object schema for both ``request`` and ``response``: + ++-------------+----+----------+ +| Property | Ty\| Descript\| +| Name | pe | ion | ++=============+====+==========+ +| format | st\| *Require\| +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | id of | +| | | the data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\| +| | | e | ++-------------+----+----------+ +| version | st\| *Require\| +| | ri\| d*. | +| | ng | Data | +| | | format | +| | | version | +| | | of the | +| | | data | +| | | format | +| | | that is | +| | | used by | +| | | this | +| | | interfac\| +| | | e | ++-------------+----+----------+ + +Note, for CDAP, there is a slight variation due to the way CDAP exposes +services: + +:: + + "provides":[ // note this is a list of JSON + { + "request":{ ...}, + "response":{ ...}, + "service_name":"name CDAP service", + "service_endpoint":"greet", // E.g the URL is /services/service_name/methods/service_endpoint + "verb":"GET" // GET, PUT, or POST + } + ] + +``provides`` Schema for a CDAP component: + ++-------------+----+-----------+ +| Property | Ty\| Descript\ | +| Name | pe | ion | ++=============+====+===========+ +| request | JS\| *Require\ | +| | ON | d*. | +| | ob\| Descript\ | +| | je\| ion | +| | ct | of the | +| | | expected | +| | | request | +| | | data | +| | | format | +| | | for this | +| | | interfac\ | +| | | e | ++-------------+----+-----------+ +| response | JS\| *Require\ | +| | ON | d*. | +| | ob\| Descript\ | +| | je\| ion | +| | ct | of the | +| | | expected | +| | | response | +| | | for this | +| | | interfac\ | +| | | e | ++-------------+----+-----------+ +| service_nam\| st\| *Require\ | +| e | ri\| d*. | +| | ng | The CDAP | +| | | service | +| | | name (eg | +| | | “Greetin\ | +| | | g”) | ++-------------+----+-----------+ +| service_end | st\| *Require\ | +| point | ri\| d*. | +| | ng | The CDAP | +| | | service | +| | | endpoint | +| | | for this | +| | | service_n\| +| | | ame | +| | | (eg | +| | | “/greet” | +| | | ) | ++-------------+----+-----------+ +| verb | st\| *Require\ | +| | ri\| d*. | +| | ng | ‘GET’, | +| | | ‘PUT’ or | +| | | ‘POST’ | ++-------------+----+-----------+ + +.. _common-specification-parameters: + +Parameters +---------- + +``parameters`` is where to specify the component’s application +configuration parameters that are not connection information. + ++---------------+------------+----------------------------------+ +| Property Name | Type | Description | ++===============+============+==================================+ +| parameters | JSON array | Each entry is a parameter object | ++---------------+------------+----------------------------------+ + +Parameter object has the following available properties: + ++--------------+----+----------+------+ +| Property | Ty\| Descript\| Defa\| +| Name | pe | ion | ult | ++==============+====+==========+======+ +| name | st\| *Require\| | +| | ri\| d*. | | +| | ng | The | | +| | | property | | +| | | name | | +| | | that | | +| | | will be | | +| | | used as | | +| | | the key | | +| | | in the | | +| | | generate\| | +| | | d | | +| | | config | | ++--------------+----+----------+------+ +| value | an\| *Require\| | +| | y | d*. | | +| | | The | | +| | | default | | +| | | value | | +| | | for the | | +| | | given | | +| | | paramete\| | +| | | r | | ++--------------+----+----------+------+ +| description | st\| *Require\| | +| | ri\| d*. | | +| | ng | Human-re\| | +| | | adable | | +| | | text | | +| | | describi\| | +| | | ng | | +| | | the | | +| | | paramete\| | +| | | r | | +| | | like | | +| | | what its | | +| | | for | | ++--------------+----+----------+------+ +| type | st\| The | | +| | ri\| required | | +| | ng | data | | +| | | type for | | +| | | the | | +| | | paramete\| | +| | | r | | ++--------------+----+----------+------+ +| required | bo\| An | true | +| | ol\| optional | | +| | ea\| key that | | +| | n | declares | | +| | | a | | +| | | paramete\| | +| | | r | | +| | | as | | +| | | required | | +| | | (true) | | +| | | or not | | +| | | (false) | | ++--------------+----+----------+------+ +| constraints | ar\| The | | +| | ra\| optional | | +| | y | list of | | +| | | sequence | | +| | | d | | +| | | constrai\| | +| | | nt | | +| | | clauses | | +| | | for the | | +| | | paramete\| | +| | | r. | | +| | | See | | +| | | below | | ++--------------+----+----------+------+ +| entry_schem\ | st\| The | | +| a | ri\| optional | | +| | ng | key that | | +| | | is used | | +| | | to | | +| | | declare | | +| | | the name | | +| | | of the | | +| | | Datatype | | +| | | definiti\| | +| | | on | | +| | | for | | +| | | entries | | +| | | of set | | +| | | types | | +| | | such as | | +| | | the | | +| | | TOSCA | | +| | | ‘list’ | | +| | | or | | +| | | ‘map’. | | +| | | Only 1 | | +| | | level is | | +| | | supporte\| | +| | | d | | +| | | at this | | +| | | time | | ++--------------+----+----------+------+ +| designer_ed\ | bo\| An | | +| itable | ol\| optional | | +| | ea\| key that | | +| | n | declares | | +| | | a | | +| | | paramete\| | +| | | r | | +| | | to be | | +| | | editable | | +| | | by | | +| | | designer | | +| | | (true) | | +| | | or not | | +| | | (false) | | ++--------------+----+----------+------+ +| sourced_at_d\| bo\| An | | +| eployment | ol\| optional | | +| | ea\| key that | | +| | n | declares | | +| | | a | | +| | | paramete\| | +| | | r’s | | +| | | value to | | +| | | be | | +| | | assigned | | +| | | at | | +| | | deployme\| | +| | | nt | | +| | | time | | +| | | (true) | | ++--------------+----+----------+------+ +| policy_edit\ | bo\| An | | +| able | ol\| optional | | +| | ea\| key that | | +| | n | declares | | +| | | a | | +| | | paramete\| | +| | | r | | +| | | to be | | +| | | editable | | +| | | by | | +| | | policy | | +| | | (true) | | +| | | or not | | +| | | (false) | | ++--------------+----+----------+------+ +| policy_sche\ | ar\| The | | +| ma | ra\| optional | | +| | y | list of | | +| | | schema | | +| | | definiti\| | +| | | ons | | +| | | used for | | +| | | policy. | | +| | | See | | +| | | below | | ++--------------+----+----------+------+ + +Example: + +.. code:: json + + "parameters": [ + { + "name": "threshold", + "value": 0.75, + "description": "Probability threshold to exceed to be anomalous" + } + ] + +Many of the parameter properties have been copied from TOSCA model +property definitions and are to be used for service design composition +and policy creation. See `section 3.5.8 *Property +definition* <http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.1/TOSCA-Simple-Profile-YAML-v1.1.html>`__. + +The property ``constraints`` is a list of objects where each constraint +object: + ++--------------+----+----------+ +| Property | Ty\| Descript\| +| Name | pe | ion | ++==============+====+==========+ +| equal | | Constrai\| +| | | ns | +| | | a | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value | +| | | equal to | +| | | (‘=’) | +| | | the | +| | | value | +| | | declared | ++--------------+----+----------+ +| greater_tha\ | nu\| Constrai\| +| n | mb\| ns | +| | er | a | +| | | property | +| | | or | +| | | paramete | +| | | r | +| | | to a | +| | | value | +| | | greater | +| | | than | +| | | (‘>’) | +| | | the | +| | | value | +| | | declared | ++--------------+----+----------+ +| greater_or_e\| nu\| Constrai\| +| qual | mb\| ns | +| | er | a | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value | +| | | greater | +| | | than or | +| | | equal to | +| | | (‘>=’) | +| | | the | +| | | value | +| | | declared | ++--------------+----+----------+ +| less_than | nu\| Constrai\| +| | mb\| ns | +| | er | a | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value | +| | | less | +| | | than | +| | | (‘<’) | +| | | the | +| | | value | +| | | declared | ++--------------+----+----------+ +| less_or_equ\ | nu\| Constrai\| +| al | mb\| ns | +| | er | a | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value | +| | | less | +| | | than or | +| | | equal to | +| | | (‘<=’) | +| | | the | +| | | value | +| | | declared | ++--------------+----+----------+ +| valid_value\ | ar\| Constrai\| +| s | ra\| ns | +| | y | a | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value | +| | | that is | +| | | in the | +| | | list of | +| | | declared | +| | | values | ++--------------+----+----------+ +| length | nu\| Constrai\| +| | mb\| ns | +| | er | the | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value of | +| | | a given | +| | | length | ++--------------+----+----------+ +| min_length | nu\| Constrai\| +| | mb\| ns | +| | er | the | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value to | +| | | a | +| | | minimum | +| | | length | ++--------------+----+----------+ +| max_length | nu\| Constrai\| +| | mb\| ns | +| | er | the | +| | | property | +| | | or | +| | | paramete\| +| | | r | +| | | to a | +| | | value to | +| | | a | +| | | maximum | +| | | length | ++--------------+----+----------+ + +``threshold`` is the configuration parameter and will get set to 0.75 +when the configuration gets generated. + +The property ``policy_schema`` is a list of objects where each +policy_schema object: + ++-------------+----+----------+------+ +| Property | Ty\| Descript\| Defa\| +| Name | pe | ion | ult | ++=============+====+==========+======+ +| name | st\| *Require\| | +| | ri\| d*. | | +| | ng | paramete\| | +| | | r | | +| | | name | | ++-------------+----+----------+------+ +| value | st\| default | | +| | ri\| value | | +| | ng | for the | | +| | | paramete\| | +| | | r | | ++-------------+----+----------+------+ +| description | st\| paramete\| | +| | ri\| r | | +| | ng | descript\| | +| | | ion | | ++-------------+----+----------+------+ +| type | en\| *Require\| | +| | um | d*. | | +| | | data | | +| | | type of | | +| | | the | | +| | | paramete\| | +| | | r, | | +| | | ‘string’ | | +| | | , | | +| | | ‘number’ | | +| | | , | | +| | | ‘boolean | | +| | | ’, | | +| | | ‘datetim\| | +| | | e’, | | +| | | ‘list’, | | +| | | or ‘map’ | | ++-------------+----+----------+------+ +| required | bo\| is | true | +| | ol\| paramete\| | +| | ea\| r | | +| | n | required | | +| | | or not? | | ++-------------+----+----------+------+ +| constraints | ar\| The | | +| | ra\| optional | | +| | y | list of | | +| | | sequence\| | +| | | d | | +| | | constrai\| | +| | | nt | | +| | | clauses | | +| | | for the | | +| | | paramete\| | +| | | r. | | +| | | See | | +| | | above | | ++-------------+----+----------+------+ +| entry_schem\| st\| The | | +| a | ri\| optional | | +| | ng | key that | | +| | | is used | | +| | | to | | +| | | declare | | +| | | the name | | +| | | of the | | +| | | Datatype | | +| | | definiti\| | +| | | on | | +| | | for | | +| | | certain | | +| | | types. | | +| | | entry_sc\| | +| | | hema | | +| | | must be | | +| | | defined | | +| | | when the | | +| | | type is | | +| | | either | | +| | | list or | | +| | | map. If | | +| | | the type | | +| | | is list | | +| | | and the | | +| | | entry | | +| | | type is | | +| | | a simple | | +| | | type | | +| | | (string, | | +| | | number, | | +| | | bookean, | | +| | | datetime | | +| | | ), | | +| | | follow | | +| | | with an | | +| | | string | | +| | | to | | +| | | describe | | +| | | the | | +| | | entry | | ++-------------+----+----------+------+ +| | If | | | +| | th\| | | +| | e | | | +| | ty\| | | +| | pe | | | +| | is | | | +| | li\| | | +| | st | | | +| | an\| | | +| | d | | | +| | th\| | | +| | e | | | +| | en\| | | +| | tr\| | | +| | y | | | +| | ty\| | | +| | pe | | | +| | is | | | +| | a | | | +| | ma\| | | +| | p, | | | +| | fo\| | | +| | ll\| | | +| | ow | | | +| | wi\| | | +| | th | | | +| | an | | | +| | ar\| | | +| | ra\| | | +| | y | | | +| | to | | | +| | de\| | | +| | sc\| | | +| | ri\| | | +| | be | | | +| | th\| | | +| | e | | | +| | ke\| | | +| | ys | | | +| | fo\| | | +| | r | | | +| | th\| | | +| | e | | | +| | en\| | | +| | tr\| | | +| | y | | | +| | ma\| | | +| | p | | | ++-------------+----+----------+------+ +| | If | | | +| | th\| | | +| | e | | | +| | ty\| | | +| | pe | | | +| | is | | | +| | li\| | | +| | st | | | +| | an\| | | +| | d | | | +| | th\| | | +| | e | | | +| | en\| | | +| | tr\| | | +| | y | | | +| | ty\| | | +| | pe | | | +| | is | | | +| | a | | | +| | li\| | | +| | st | | | +| | , | | | +| | th\| | | +| | at | | | +| | is | | | +| | no\| | | +| | t | | | +| | cu\| | | +| | rr\| | | +| | en\| | | +| | tl\| | | +| | y | | | +| | su\| | | +| | pp\| | | +| | or\| | | +| | te\| | | +| | d \| | | ++-------------+----+----------+------+ +| | If | | | +| | th\| | | +| | e | | | +| | ty\| | | +| | pe | | | +| | is | | | +| | ma\| | | +| | p, | | | +| | fo\| | | +| | ll\| | | +| | ow | | | +| | wi\| | | +| | th | | | +| | an | | | +| | ar\| | | +| | ay | | | +| | to | | | +| | de\| | | +| | sc\| | | +| | ri\| | | +| | be | | | +| | th\| | | +| | e | | | +| | ke\| | | +| | ys | | | +| | fo\| | | +| | r | | | +| | th\| | | +| | e | | | +| | ma\| | | +| | p | | | ++-------------+----+----------+------+ + + +.. _artifacts: + +Artifacts +--------- + +``artifacts`` contains a list of artifacts associated with this +component. For Docker, this is the full path (including the registry) to +the Docker image. For CDAP, this is the full path to the CDAP jar. + ++---------------+------------+---------------------------------+ +| Property Name | Type | Description | ++===============+============+=================================+ +| artifacts | JSON array | Each entry is a artifact object | ++---------------+------------+---------------------------------+ + +``artifact`` Schema: + ++---------------+--------+--------------------------------------------+ +| Property Name | Type | Description | ++===============+========+============================================+ +| uri | string | *Required*. Uri to the artifact, full path | ++---------------+--------+--------------------------------------------+ +| type | string | *Required*. ``docker image`` or ``jar`` | ++---------------+--------+--------------------------------------------+ + +.. _auxilary: + +Auxilary +-------- + + +Health check +~~~~~~~~~~~~ + +Component developers are required to provide a way for the platform to +periodically check the health of their running components. The +details of the definition used by your component is to be provided +through the :any:`Docker auxiliary specification <docker-auxiliary-details>`. + +The information contained in the auxilary_docker field is the Docker component specification schema. Some properties of the docker component specification include - + +healthcheck : Defines the health check that Consul should perform for this component + +log_info : Component specific details for logging, includes the path in the container where logs are written that can also be used for logstash/kibana style reporting. + +ports : Port mapping to be used for Docker containers. Each entry is of the format <container port>:<host port>. + +tls_info : Component information for use of tls certificates, where they will be available, whether or not to use them + +policy : Information for Policy configuration and reconfiguration + +databases: Information about databases the application should connect to + +volumes: Contains information on volume mapping for the docker containers + + +Schema portion: + +.. code:: json + + "auxilary_docker": { + "title": "Docker component specification schema", + "type": "object", + "properties": { + "healthcheck": { + "description": "Define the health check that Consul should perfom for this component", + "type": "object", + "oneOf": [ + { "$ref": "#/definitions/docker_healthcheck_http" }, + { "$ref": "#/definitions/docker_healthcheck_script" } + ] + }, + "ports": { + "description": "Port mapping to be used for Docker containers. Each entry is of the format <container port>:<host port>.", + "type": "array", + "items": { + "type": "string" + } + }, + "log_info": { + "description": "Component specific details for logging", + "type": "object", + "properties": { + "log_directory": { + "description": "The path in the container where the component writes its logs. If the component is following the EELF requirements, this would be the directory where the four EELF files are being written. (Other logs can be placed in the directory--if their names in '.log', they'll also be sent into ELK.)", + "type": "string" + }, + "alternate_fb_path": { + "description": "By default, the log volume is mounted at /var/log/onap/<component_type> in the sidecar container's file system. 'alternate_fb_path' allows overriding the default. Will affect how the log data can be found in the ELK system.", + "type": "string" + } + }, + "additionalProperties": false + }, + "tls_info": { + "description": "Component information to use tls certificates", + "type": "object", + "properties": { + "cert_directory": { + "description": "The path in the container where the component certificates will be placed by the init container", + "type": "string" + }, + "use_tls": { + "description": "Boolean flag to determine if the application is using tls certificates", + "type": "boolean" + } + }, + "required": [ + "cert_directory","use_tls" + ], + "additionalProperties": false + }, + "databases": { + "description": "The databases the application is connecting to using the pgaas", + "type": "object", + "additionalProperties": { + "type": "string", + "enum": [ + "postgres" + ] + } + }, + "policy": { + "properties": { + "trigger_type": { + "description": "Only value of docker is supported at this time.", + "type": "string", + "enum": ["docker"] + }, + "script_path": { + "description": "Script command that will be executed for policy reconfiguration", + "type": "string" + } + }, + "required": [ + "trigger_type","script_path" + ], + "additionalProperties": false + }, + "volumes": { + "description": "Volume mapping to be used for Docker containers. Each entry is of the format below", + "type": "array", + "items": { + "type": "object", + "properties": { + "host":{ + "type":"object", + "path": {"type": "string"} + }, + "container":{ + "type":"object", + "bind": { "type": "string"}, + "mode": { "type": "string"} + } + } + } + } + }, + "required": [ + "healthcheck" + ], + "additionalProperties": false + } + |