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| author |   Michael Hwang <mhwang@research.att.com> | 2017-11-06 14:52:37 -0500 |
|---|---|---|
| committer | Michael Hwang <mhwang@research.att.com> | 2017-11-06 14:53:29 -0500 |
| commit | 3d2b2aed3172d48325ed91ee6c1546c5172bac5e (patch) | |
| tree | ec0ae314c46c33998b11ae7a1e4e48d0720425ee /platformdoc/docs/components/component-specification | |
| parent | a73548f4eb6ba4bdb2b2064c7e24a4b74b467f5a (diff) | |
Merge in accumulated changes
Change-Id: I3cd9da556c31efe879f0ff1eaf48f63e4fc353aa
Issue-Id: DCAEGEN2-189
Signed-off-by: Michael Hwang <mhwang@research.att.com>
Diffstat (limited to 'platformdoc/docs/components/component-specification')
6 files changed, 355 insertions, 205 deletions
diff --git a/platformdoc/docs/components/component-specification/cdap-specification.md b/platformdoc/docs/components/component-specification/cdap-specification.md index 479cc944..d4d01406 100644 --- a/platformdoc/docs/components/component-specification/cdap-specification.md +++ b/platformdoc/docs/components/component-specification/cdap-specification.md @@ -1,31 +1,21 @@ # Component specification (CDAP) -## Overview +The CDAP component specification contains the following groups of information. Many of these are common to both CDAP and Docker components and are therefore described in the common specification. -This page contains details specific to CDAP applications. +* [Metadata](common-specification.md#metadata) +* [Interfaces](common-specification.md#interfaces) including the associated [Data Formats](/components/data-formats.md) +* [Parameters](#parameters) - for specifying parameters in your AppConfig, AppPreferences, and ProgramPreferences to the Designer and Policy. This of course is CDAP-specific and is described below. +* [Auxiliary Details](#auxiliary-details) +* [List of artifacts](common-specification.md#artifacts) -The component specification contains the following top-level groups of information: - -* Component [Metadata](#metadata) -* [Parameters](#Parameters): the section for specifying parameters in your AppConfig, AppPreferences, and ProgramPreferences to the Designer and Policy. -* [Interfaces](#interfaces): the connections from this component to other components -* [Auxiliary details](#auxiliary) -* [List of artifacts](#artifacts) - -Note: this page does not talk about [DCAE specific requirements](/components/component-type-cdap.md) that your component must adhere to. Please see that page for discussions about DMaaP, Policy, Metrics, and more. ## Current Limitations and TODOs -* Currently we only support CDAP applications that have a stream. * The integration of DMD is likely to significantly change the [Interfaces](#interfaces) section in this specification, see [DMaaP abstraction](/components/component-type-cdap.md#dmaap-abstraction). -## Metadata - -See [Metadata](common-specification.md#metadata) - ## Parameters -There is a `parameters` section in your component specification. This section contains three optional keys: [app_config](#appconfig), [app_preferences](#apppreferences), and [propram_preferences](#prorgram_preferences): +There is a `parameters` section in your component specification. This section contains three optional keys: [app_config](#appconfig), [app_preferences](#apppreferences), and [propram_preferences](#program_preferences): ``` "parameters" : { "app_config" : [ ...], @@ -42,21 +32,15 @@ There is a `parameters` section in your component specification. This section co * Despite the AppConfig being optional to *specify* in the case that you have no parameters in your AppConfig, it is *required for processing* in your application. That is because the DCAE platform will place important information into your AppConfig as discussed below. ### Parameter -We use the following definition of a _single parameter_, which is used in several places below: -``` - { - "name" : "param name", - "value" : "developer default", - "description" : "tell policy/ops what this does" - } -``` + +The following CDAP specific definitions use `param1` to refer to the common parameter layout in [Parameter](common-specification.md#parameters) ### AppConfig The `app_config` key refers to the [CDAP AppConfig](http://docs.cask.co/cdap/current/en/reference-manual/http-restful-api/configuration.html). It is expected to be a JSON: ``` "app_config" : [ // list of JSON - param1, // see Parameter above + param1, // common parameter layout ... ] ``` @@ -70,15 +54,15 @@ Unfortunately, at the time of writing, the AppConfig is a Java map of `string:st >>> ``` -The final AppConfig (after the designer and policy override parameter values) is passed into CDAP's AppConfig API when starting your application. +The final AppConfig (after the designer and policy override parameter values) is passed into CDAP's AppConfig API when starting the application. ### AppPreferences -In addition to the CDAP AppConfig, we support [Application Preferences](http://docs.cask.co/cdap/current/en/reference-manual/http-restful-api/preferences.html#set-preferences). +In addition to the CDAP AppConfig, the platform supports [Application Preferences](http://docs.cask.co/cdap/current/en/reference-manual/http-restful-api/preferences.html#set-preferences). The format of the `app_preferences` value is the same as the above: ``` "app_preferences" : [ // list of JSON - param1, // see Parameter above + param1, // common parameter layout ... ] ``` @@ -94,22 +78,20 @@ Preferences can also be specified [per program](http://docs.cask.co/cdap/current "program_id" : "program name 1", // the name of this CDAP program "program_type" : "e.g., flows", // "must be one of flows, mapreduce, schedules, spark, workflows, workers, or services", "program_pref" : [ // list of JSON - param1, // see Parameter above + param1, // common parameter layout ... ] }, - // repeat for each program you want to pass a preferences JSON to + // repeat for each program that receives a program_preferences JSON ] ``` Each `program_pref` JSON is passed into the CDAP API as the preference for `program_id`. -## Interfaces -See [Interfaces](common-specification.md#interfaces) NOTE: for CDAP, this section is very likely to change when DMD is available. The _future_ vision, as per [DMaaP intentionally abstracted](/components/component-type-cdap.md#dmaap-abstraction) is that you would publish your data as a series of files on HDFS, and DMD will pick them up and send them to the appropriate DMaaP feeds or directly when needed. -## Auxiliary +## Auxiliary Details `auxiliary` contains details about CDAP specific parameters. @@ -126,7 +108,7 @@ program_id | string | name of CDAP entity (eg "WhoFlow") Example: ```json -+"auxiliary": { +"auxiliary": { "streamname" : "who", "artifact_name" : "HelloWorld", "artifact_version" : "3.4.3", @@ -143,21 +125,3 @@ The `programs` key is identical to the `program_preferences` key discussed [abov * each JSON in the list does not contain `program_pref` * this is required! You must include all of your programs in this, as it is used to start each program as well as for DCAE to perform periodic healthchecks on your application. Don't forget about your services; they are programs too. -+ -## Artifacts - -`artifacts` contains a list of artifacts associated with this component. This is where you specify your CDAP jar. - -Property Name | Type | Description -------------- | ---- | ----------- -artifacts | JSON array | Each entry is a artifact object - -Each artifact object has: - -Property Name | Type | Description -------------- | ---- | ----------- -uri | string | *Required*. Uri to the artifact -type | string | *Required*. For CDAP, use `jar` - -This file is uploading using the CLI tool at the same time as your component specification. - diff --git a/platformdoc/docs/components/component-specification/common-specification.md b/platformdoc/docs/components/component-specification/common-specification.md index 77f2a7f0..06f7f76c 100644 --- a/platformdoc/docs/components/component-specification/common-specification.md +++ b/platformdoc/docs/components/component-specification/common-specification.md @@ -1,11 +1,11 @@ -# Component specification (Common elements) +# Common Elements of the Component Specification -This page describes component specification sections that are common (or nearly) to both Docker and CDAP. +This page describes the component specification (JSON) sections that are common to both Docker and CDAP components. Differences for each are pointed out below. Elements that are very different, and described in the CDAP or Docker specific pages. ## Component Metadata -Metadata refers to the properties found under the `self` JSON. This group of properties are used to uniquely identify this component specification and identify the component that this specification is used to capture. The metadata section, represented under `self`, is used to uniquely identify your component among all components in the catalog. +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. -From the specification example above: +Example: ``` "self": { @@ -16,26 +16,27 @@ From the specification example above: }, ``` -Here is a breakdown of the schema: +`self` Schema: Property Name | Type | Description ------------- | ---- | ----------- 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. The name includes a namespace that is dot-separated. -description | string | Human-readable text blurb describing the component and the components functional purpose. +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_type | string | *Required*. Identify what containerization technology this component uses: `docker` or `cdap`. ## 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 [data format](/components/data-formats.md). ### Streams - * The `streams` JSON is for specifying that you produce data that can be consumed by other components, and the streams you expect to subscribe to 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. + * 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. * 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. +* 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: @@ -47,7 +48,7 @@ publishes | JSON list | *Required*. List of all stream interfaces that this com #### Subscribes -From the example specification: +Example: ```json "streams": { @@ -63,18 +64,20 @@ From the example specification: This describes that `asimov.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`. -The JSON object schema used in `subscribes`: +`subscribes` Schema: Property Name | Type | Description ------------- | ---- | ----------- format | string | *Required*. Data format id of the data format that is used by this interface version | string | *Required*. Data format version of the data format that is used by this interface -route | string | *Required*. The HTTP route that this interface listens on +route | string | *Required for HTTP and data router*. The HTTP route that this interface listens on +config_key | string | *Required for message_router and data router*. The HTTP route that this interface listens on type | string | *Required*. Type of stream: `http`, `message_router`, `data_router` + ##### Message router -Message router subscribers are http clients rather than http services and performs a http `GET` call. Thus, message router subscribers description is structured like message router publishers and requires `config_key`: +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`: ```json "streams": { @@ -90,7 +93,7 @@ Message router subscribers are http clients rather than http services and perfor ##### 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 your subscriber to the provisioned feed. Developers must also provide a `config_key` because there is dynamic configuration information associated with the feed that your application will need e.g. username and password. See the page on [DMaaP connection objects](../dcae-cli/dmaap-connection-objects) for more details on the configuration information. +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 [DMaaP connection objects](../dcae-cli/dmaap-connection-objects) for more details on the configuration information. Example (not tied to the larger example): @@ -109,7 +112,7 @@ Example (not tied to the larger example): #### Publishes -From the example specification: +Example: ```json "streams": { @@ -126,18 +129,36 @@ From the example specification: This describes that `asimov.component.kpi_anomaly` publishes by making POST requests to streams that support the data format `asimov.format.integerClassification` version `1.0.0`. -The JSON object schema used in `publishes`: +`publishes` Schema: Property Name | Type | Description ------------- | ---- | ----------- format | string | *Required*. Data format id of the data format that is used by this interface version | string | *Required*. Data format version of the data format that is used by this interface -config_key | string | *Required*. The JSON key in the generated application configuration that will be used to pass the downstream component connection information. -type | string | *Required*. Type of stream: `http`, `message router` +config_key | string | *Required*. The JSON key in the generated application configuration that will be used to pass the downstream component's (the subscriber's) connection information. +type | string | *Required*. Type of stream: `http`, `message router`, `data router` + +##### 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 will need to receive e.g. topic url, username, password. See the page on [DMaaP connection objects](../dcae-cli/dmaap-connection-objects/#message_router) for more details on the configuration information. + +Example (not tied to the larger example): + +```json +"streams": { +... + "publishes": [{ + "config_key": "some-pub-mr", + "format": "sandbox.platform.any", + "type": "message_router", + "version": "0.1.0" + }] +} +``` ##### 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 your application will need to receive e.g. publish url, username, password. See the page on [DMaaP connection objects](../dcae-cli/dmaap-connection-objects) for more details on the configuration information. +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 [DMaaP connection objects](../dcae-cli/dmaap-connection-objects) for more details on the configuration information. Example (not tied to the larger example): @@ -153,6 +174,11 @@ Example (not tied to the larger example): } ``` +#### Quick Reference + +Refer to this [Quick Reference](/components/component-specification/streams-grid.md) 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 @@ -167,10 +193,10 @@ calls | JSON list | *Required*. List of all service interfaces that this compon provides | JSON list | *Required*. List of all service interfaces that this component exposes and provides #### Calls -The JSON `services/calls` is for specifying that your component relies on an HTTP(S) service---your component sends that service an HTTP request, and that service responds with an HTTP reply. +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`. -From the example specification: +Example: ```json "services": { @@ -191,7 +217,7 @@ From the example specification: This describes that `asimov.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`. -The JSON object schema used in `calls`: +`calls` Schema: Property Name | Type | Description ------------- | ---- | ----------- @@ -208,7 +234,7 @@ version | string | *Required*. Data format version of the data format that is u #### Provides -From the example specification: +Example: ```json "services": { @@ -229,7 +255,7 @@ From the example specification: This describes that `asimov.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 `asimov.format.integerClassification` version `1.0.0`. -The JSON object schema used in `provides`: +`provides` Schema for a Docker component: Property Name | Type | Description ------------- | ---- | ----------- @@ -256,3 +282,116 @@ Note, for CDAP, there is a slight variation due to the way CDAP exposes services } ] ``` + +`provides` Schema for a CDAP component: + +Property Name | Type | Description +------------- | ---- | ----------- +request | JSON object | *Required*. Description of the expected request data format for this interface +response | JSON object | *Required*. Description of the expected response for this interface +service_name | string | *Required*. The CDAP service name (eg "Greeting") +service_endpoint | string | *Required*. The CDAP service endpoint for this service_name (eg "/greet") +verb | string | *Required*. 'GET', 'PUT' or 'POST' + + +## 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 Name | Type | Description | Default +------------- | ---- | ----------- | ------- +name | string | *Required*. The property name that will be used as the key in the generated config | +value | any | *Required*. The default value for the given parameter | +description | string | *Required*. Human-readable text describing the parameter like what its for | +type | string | The required data type for the parameter | +required | boolean | An optional key that declares a parameter as required (true) or not (false) | true +constraints | array | The optional list of sequenced constraint clauses for the parameter. See below | +entry_schema | string | The optional key that is used to declare the name of the Datatype definition for entries of set types such as the TOSCA 'list' or 'map'. Only 1 level is supported at this time | +designer_editable | boolean | An optional key that declares a parameter to be editable by designer (true) or not (false) | true +sourced_at_deployment | boolean | An optional key that declares a parameter's value to be assigned at deployment time (true) | false +policy_editable | boolean | An optional key that declares a parameter to be editable by policy (true) or not (false) | true +policy_schema | array | The optional list of schema definitions used for policy. See below | + +Example: + +```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 Name | Type | Description +------------- | ---- | ----------- +equal | | Constrains a property or parameter to a value equal to (‘=’) the value declared +greater_than | number | Constrains a property or parameter to a value greater than (‘>’) the value declared +greater_or_equal | number | Constrains a property or parameter to a value greater than or equal to (‘>=’) the value declared +less_than | number | Constrains a property or parameter to a value less than (‘<’) the value declared +less_or_equal | number | Constrains a property or parameter to a value less than or equal to (‘<=’) the value declared +valid_values | array | Constrains a property or parameter to a value that is in the list of declared values +length | number | Constrains the property or parameter to a value of a given length +min_length | number | Constrains the property or parameter to a value to a minimum length +max_length | number | Constrains the property or parameter 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 Name | Type | Description | Default +------------- | ---- | ----------- | ------- +name | string | *Required*. parameter name +value | string | default value for the parameter +description | string | parameter description +type | enum | *Required*. data type of the parameter, 'string', 'number', 'boolean', 'datetime', 'list', or 'map' +required | boolean | is parameter required or not? | true +constraints | array | The optional list of sequenced constraint clauses for the parameter. See above | +entry_schema | string | The optional key that is used to declare the name of the Datatype definition for certain types. entry_schema 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 the type is list and the entry type is a map, follow with an array to describe the keys for the entry map | +| | If the type is list and the entry type is a list, that is not currently supported +| | If the type is map, follow with an aray to describe the keys for the map | + +## Generated Application Configuration + +The above example for component `asimov.component.kpi_anomaly` will get transformed into the following application configuration JSON that is fully resolved and provided at runtime by calling the `config binding service`: + +```json +{ + "streams_publishes": { + "prediction": ["10.100.1.100:32567"] + }, + "streams_subscribes": {}, + "threshold": 0.75, + "services_calls": { + "vnf-db": ["10.100.1.101:32890"] + } +} +``` + +## 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` + diff --git a/platformdoc/docs/components/component-specification/configuration-grid.md b/platformdoc/docs/components/component-specification/configuration-grid.md new file mode 100644 index 00000000..e9054593 --- /dev/null +++ b/platformdoc/docs/components/component-specification/configuration-grid.md @@ -0,0 +1,13 @@ + +# Configuration Quick Reference + +The following types of configuration are supported by the DCAE Platform. + +|Input Sources|Default Values|Designer Input |Clamp Input|Policy Input|Runtime Input| +|---------|---------|----------|---------|----------|---| +|Notes||This applies only to components that are self-service (supported by SDC) |This applies only to components that are part of a closed-loop interface || | +|Who provides?|Component Developer|Service Designer|CLAMP|Operations|Runtime Platform| +| When/Where it is provided |During onboarding – in the component specification | At design time – in the SDC UI | At installation – in the CLAMP UI | Anytime – in the POLICY GUI | When the component is deployed | +|Component Specification Details|For CDAP:<br> ‘value’ Name and KV pairs in AppConfig or AppPreferences For Docker:<br> ‘value’ is provided for variable in ‘parameter’ section|‘designer-editable’ must be set to ‘true’ for variable in ‘parameter’ section. || ‘policy-editable’ must be set to ‘true’ and ‘policy_schema’ must be provided for variable in ‘parameter’ section |'sourced_at_<br>deployment' must be set to 'true' for variable in 'parameter' section | +| How it is used | This is passed to the component in the generated configuration if not overridden.|This overrides any values previously set, but can be overridden by CLAMP or POLICY.|This overrides any values previously set, but can be overridden by POLICY.|This overrides any values previously set, but can be overridden at any point thereafter.|This overrides any values previously set, but can be overridden at any point thereafter by Policy. | +| Additional Info for Component Developer|For CDAP:<br> ‘value’ is provided for variable in the ‘AppConfig’ or ‘AppPreferences’ sections<br><br> For Docker:<br> ‘value’ is provided for variable in ‘parameter’ section|||For Docker: In the auxiliary section:<br> {"policy": {"trigger_type": "policy","script_path": “/opt/app/reconfigure.sh”} }<br> Script interface must be "opt/app/reconfigure.sh” $trigger_type $updated_policies $updated_appl_config" <br> where $updated_policies is a json provided by the Policy Handler and <br> $update_appl_config is the post-merged appl config which may contain unresolved configuration that didn’t come from policy.<br> Suggestion is for script to call CONFIG BINDING SERVICE to resolve any configuration. | diff --git a/platformdoc/docs/components/component-specification/docker-specification.md b/platformdoc/docs/components/component-specification/docker-specification.md index 2bff6c47..79d3a88b 100644 --- a/platformdoc/docs/components/component-specification/docker-specification.md +++ b/platformdoc/docs/components/component-specification/docker-specification.md @@ -1,96 +1,39 @@ # Component specification (Docker) -This page contains details specific to Dockerized applications. +The Docker component specification contains the following groups of information. Many of these are common to both Docker and CDAP components and are therefore described in the common specification. -The component specification contains the following top-level groups of information: +* [Metadata](common-specification.md#metadata) +* [Interfaces](common-specification.md#interfaces) including the associated [Data Formats](/components/data-formats.md) +* [Parameters](common-specification.md#parameters) +* [Auxiliary Details](#auxiliary-details) +* [List of Artifacts](common-specification.md#artifacts) -* [Component metadata](#metadata) -* [Component interfaces](#interfaces) including the associated [data formats](/components/data-formats.md) -* [Configuration parameters](#configuration-parameters) -* [Auxiliary details](#auxilary) -* [List of artifacts](#artifacts) +## Auxiliary Details -## Metadata +`auxiliary` contains Docker specific details like health check, port mapping, volume mapping, and policy reconfiguration script details. -See [Metadata](common-specification.md#metadata) - -## Interfaces - -See [Interfaces](common-specification.md#interfaces) - -## Configuration 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 Name | Type | Description | Default -------------- | ---- | ----------- | ------- -name | string | *Required*. The property name that will be used as the key in the generated config | -value | any | *Required*. The default value for the given parameter | -description | string | *Required*. Human-readable text describing the parameter like what its for | -type | string | The required data type for the parameter | -required | boolean | An optional key that declares a parameter as required (true) or not (false) | true -constraints | array | The optional list of sequenced constraint clauses for the parameter | -entry_schema | string | The optional key that is used to declare the name of the Datatype definition for entries of set types such as the TOSCA list or map | -designer_editable | boolean | An optional key that declares a parameter to be editable by designer (true) or not (false) | true -policy_editable | boolean | An optional key that declares a parameter to be editable by policy (true) or not (false) | true -policy_schema | array | The optional list of schema definitions used for policy | - -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 Name | Type | Description -------------- | ---- | ----------- -equal | | Constrains a property or parameter to a value equal to (‘=’) the value declared -greater_than | number | Constrains a property or parameter to a value greater than (‘>’) the value declared -greater_or_equal | number | Constrains a property or parameter to a value greater than or equal to (‘>=’) the value declared -less_than | number | Constrains a property or parameter to a value less than (‘<’) the value declared -less_or_equal | number | Constrains a property or parameter to a value less than or equal to (‘<=’) the value declared -valid_values | array | Constrains a property or parameter to a value that is in the list of declared values -length | number | Constrains the property or parameter to a value of a given length -min_length | number | Constrains the property or parameter to a value to a minimum length -max_length | number | Constrains the property or parameter to a value to a maximum length - -From the example specification: - -```json -"parameters": [ - { - "name": "threshold", - "value": 0.75, - "description": "Probability threshold to exceed to be anomalous" - } -] -``` - -`threshold` is the configuration parameter and will get set to 0.75 when the configuration gets generated. - -## Auxiliary - -`auxilary` contains Docker specific details like health check and port mapping information. - -Property Name | Type | Description +Name | Type | Description ------------- | ---- | ----------- healthcheck | JSON object | *Required*. Health check definition details ports | JSON array | each array item maps a container port to the host port. See example below. +volume | JSON array | each array item contains a host and container object. See example below. | | +policy | JSON array | *Required*. Policy script details + +### Health Check Definition -### Health check definition +The platform uses Consul to perform periodic health check calls. Consul provides different types of [check definitions](https://www.consul.io/docs/agent/checks.html). The platform currently supports http and docker health checks. -The platform uses Consul to perform periodic health check calls. Consul provides different types of [check definitions](https://www.consul.io/docs/agent/checks.html). The platform currently supports http and docker health checks. +When choosing a value for interval, consider that too frequent healthchecks will put unnecessary load on Consul and DCAE. If there is a problematic resource, then more frequent healthchecks are warranted (eg 15s or 60s), but as stablility increases, so can these values, (eg 300s). -#### http +When choosing a value for timeout, consider that too small a number will result in increasing timeout failures, and too large a number will result in a delay in the notification of resource problem. A suggestion is to start with 5s and workd from there. + +#### http Property Name | Type | Description ------------- | ---- | ----------- type | string | *Required*. `http` -interval | string | Interval duration in seconds i.e. `15s` -timeout | string | Timeout in seconds i.e. `1s` +interval | string | Interval duration in seconds i.e. `60s` +timeout | string | Timeout in seconds i.e. `5s` endpoint | string | *Required*. GET endpoint provided by the component for Consul to call to check health Example: @@ -106,7 +49,7 @@ Example: } ``` -#### docker +#### docker script example Property Name | Type | Description ------------- | ---- | ----------- @@ -130,9 +73,7 @@ Example: } ``` -### Ports example - -Example: +### Ports ```json "auxilary": { @@ -142,23 +83,93 @@ Example: In the example above, container port 8080 maps to host port 8000. -## Artifacts +### Volume Mapping -`artifacts` contains a list of artifacts associated with this component. For Docker, this would be where you specify your Docker image full path including registry. +```json +"auxilary": { + "volumes": [ + { + "container": { + "bind": "/tmp/docker.sock", + "mode": "ro" + }, + "host": { + "path": "/var/run/docker.sock" + } + } + ] +} +``` + +At the top-level: Property Name | Type | Description ------------- | ---- | ----------- -artifacts | JSON array | Each entry is a artifact object +volumes | array | Contains container and host objects -Each artifact object has: +The `container` object contains: Property Name | Type | Description ------------- | ---- | ----------- -uri | string | *Required*. Uri to the artifact -type | string | *Required*. `docker image` or `jar` +bind | string | path to the container volume +mode | string | "ro" - indicates read-only volume + | | "" - indicates that the contain can write into the bind mount -## Example -Here is a full example of a component spec: +The `host` object contains: + +Property Name | Type | Description +------------- | ---- | ----------- +path | string | path to the host volume + +Here's an example of the minimal JSON that must be provided as an input: + +```json +"auxilary": { + "volumes": [ + { + "container": { + "bind": "/tmp/docker.sock" + }, + "host": { + "path": "/var/run/docker.sock" + } + } + ] +} +``` + +In the example above, the container volume "/tmp/docker.sock" maps to host volume "/var/run/docker.sock". + +### Policy + +Policy changes made in the Policy UI will be provided to the Docker component by triggering a script that is defined here. + +Property Name | Type | Description +------------- | ---- | ----------- +reconfigure_type | string | *Required*. Current value supported is `policy` +script_path | string | *Required*. Current value for 'policy' reconfigure_type must be "/opt/app/reconfigure.sh" + +Example: + +```json +"auxilary": { + "policy": { + "reconfigure_type": "policy", + "script_path": "/opt/app/reconfigure.sh" + } +} +``` + +The docker script interface is as follows: <br><br> `/opt/app/reconfigure.sh $reconfigure_type {"updated policies": <updated policies object>, "application config": <applcation config object>} + +Name | Type | Description +---- | ---- | ----------- +reconfigure_type | string | "policy" +updated_policies | json | TBD +updated_appl_config | json | complete generated app_config, not fully-resolved, but `policy-enabled` parameters have been updated. In order to get the complete updated app_config, the component would have to call `config-binding-service`. + + +## Docker Component Spec - Complete Example ```json { @@ -222,25 +233,9 @@ Here is a full example of a component spec: } }, "artifacts": [{ - "uri": "YOUR_NEXUS_DOCKER_REGISTRY/kpi_anomaly:1.0.0", + "uri": "fake.nexus.com/dcae/kpi_anomaly:1.0.0", "type": "docker image" }] } ``` -## Generate application configuration - -The above example `asimov.component.kpi_anomaly` will get transformed into the following application configuration JSON that is fully resolved and provided at runtime by calling the config binding service: - -```json -{ - "streams_publishes": { - "prediction": ["10.100.1.100:32567"] - }, - "streams_subscribes": {}, - "threshold": 0.75, - "services_calls": { - "vnf-db": ["10.100.1.101:32890"] - } -} -``` diff --git a/platformdoc/docs/components/component-specification/start-here.md b/platformdoc/docs/components/component-specification/start-here.md index 3816dd06..e69de29b 100644 --- a/platformdoc/docs/components/component-specification/start-here.md +++ b/platformdoc/docs/components/component-specification/start-here.md @@ -1,21 +0,0 @@ -# Component specification - -Every component that onboards onto the DCAE platform requires a component specification. The component specification is a JSON artifact that fully describes your components. The format of the component specification is standardized for CDAP applications and Dockerized applications and is validated using [a JSON schema](ONAP URL TBD). - -The component specification is used by: - -* Design - TOSCA models are generated from the component specification so that your component can be used by designers to compose new DCAE services in SDC. -* Policy - TOSCA models are generated from the component specification so that operations can create policy models used to dynamically configure your component. -* Runtime platform - Your component's application configuration (JSON) is generated from the component specification and will be provided to your component at runtime. - -## dcae-cli - -Use the [`dcae-cli`](../dcae-cli/quickstart) tool to manage your component specification and to test your components with it. - -The dcae-cli can also be used to view component specifications that have already been added and published. Please check out the [shared catalog](../dcae-cli/walkthrough/#shared-catalog) for examples for both Docker and CDAP. - -## Next - -If you are building a CDAP application, review the [component specification details for CDAP](cdap-specification.md). - -If you are building a Dockerized application, review the [component specification details for Docker](docker-specification.md). diff --git a/platformdoc/docs/components/component-specification/streams-grid.md b/platformdoc/docs/components/component-specification/streams-grid.md new file mode 100644 index 00000000..b6d64745 --- /dev/null +++ b/platformdoc/docs/components/component-specification/streams-grid.md @@ -0,0 +1,60 @@ + +# Streams Formatting Quick Reference + +Each of the following tables represents an example of a publisher and its subscriber, which are of course, different components. This focuses on the fields that are ‘different’ for each of these TYPEs, to illustrate the relationship between `config_key`, dmaap connection object, and the generated configuration. Some notes on specific properties: + +* `config_key` is an arbitrary string, chosen by the component developer. It is returned in the generated configuration where it contains specific values for the target connection +* `format`, `version`, and `type` properties in the subscriber would match these properties in the publisher +* `aaf_username` and `aaf_password` may be different between the publisher and the subscriber + + + +### Using http + +#### *Publishing Component* + +| component spec | runtime platform generated config | +|----------------|-----------------------------------| +|"streams":{<br> "publishes":[{<br> "config_key":"prediction",<br> "format":"some-format",<br> "type":"http",<br> "version":"0.1.0"<br> }]<br>}<br>|"streams_publishes":{<br> "prediction":["10.100.1.100:32567/data"] | + +#### *Subscribing Component* + +| component spec | runtime platform generated config | +|----------------|-----------------------------------| +|"streams":{<br> "subscribes":[{<br> "route":"/data",<br> "format":"some-format",<br> "type":"http",<br> "version":"0.1.0"<br> }]<br>}<br>|"N/A"| + + + +### Using Message Router + +#### *Publishing Component* + +Note: When deploying, this component should be deployed first so satisfy downstream dependencies. Refer to the –force option in component ‘run’ command for more information. + +| component spec | Dmaap Connection Object | runtime platform generated config | +|----------------|-------------------------| --------------------------------- | +|"streams":{<br> "publishes":[{<br> "config_key":"mr_output",<br> "format":"some-format",<br> "type":"message_router",<br> "version":"0.1.0"<br> }]<br>} | {<br> "type":"message_router",<br> "dmaap_info": {<br> "topic_url": "https://we-are-message-router.us:3905/events/some-topic" }<br>} <br><br>*Note: For message router, this object is identical for the publisher and the subscriber* | "streams_publishes":{<br> "mr_output":{<br> "aaf_username":"pub-user",<br> "aaf_password":"pub-pwd",<br> "type":"message_router",<br> "dmaap_info":{<br> "topic_url":"https://we-are-message-router.us:3905/events/some-topic"}<br> }<br>},<br> "streams_subscribes":{<br>…<br>} + +#### *Subscribing Component* + +| component spec | Dmaap Connection Object | runtime platform generated config | +|----------------|-------------------------| --------------------------------- | +|"streams":{<br> "subscribes":[{<br> "config_key":"mr_input",<br> "format":"some-format",<br> "type":"message_router",<br> "version":"0.1.0"<br> }]<br>} | {<br> "type":"message_router",<br> "dmaap_info": {<br> "topic_url": "https://we-are-message-router.us:3905/events/some-topic" }<br>} <br><br>*Note: For message router, this object is identical for the publisher and the subscriber* | "streams_publishes":{<br>…<br>},<br> "streams_subscribes":{<br> "mr_input":{<br> "aaf_username":"sub-user",<br> "aaf_password":"sub-pwd",<br> "type":"message_router",<br> "dmaap_info":{<br> "topic_url":"https://we-are-message-router.us:3905/events/some-topic"}<br> }<br>} + + + + +### Using Data Router + +#### *Publishing Component* + +| component spec | Dmaap Connection Object | runtime platform generated config | +|----------------|-------------------------| --------------------------------- | +|"streams":{<br> "publishes":[{<br> "config_key":"dr_output",<br> "format":"some-format",<br> "type":"data_router",<br> "version":"0.1.0"<br> }]<br>} | {<br> "type":"data_router",<br> "dmaap_info": {<br> "location": "mtc00",<br> "publish_url": "https://we-are-data-router.us/feed/xyz", <br> "log_url": "https://we-are-data-router.us/feed/xyz/logs",<br> "username": "pub-user",<br> "password": "pub-password",<br> "publisher_id": "123456"}<br>} | streams_publishes":{<br> "dr_output":{<br> "type":"data_router",<br> "dmaap_info":{<br> "location":"mtc00",<br> "publish_url":"https://we-are-data-router.us/feed/xyz",<br> "log_url":"https://we-are-data-router.us/feed/xyz/logs",<br> "username":"pub-user",<br> "password":"pub-password",<br> "publisher_id":"123456"}<br> }<br>},<br> "streams_subscribes":{<br> …<br> } + +#### *Subscribing Component* + +| component spec | Dmaap Connection Object | runtime platform generated config | +|----------------|-------------------------| --------------------------------- | +|"streams":{<br> "subscribes":[{<br> "config_key":"dr_input",<br> "format":"some-format",<br> "type":"data_router",<br> "version":"0.1.0",<br> "route":"/target-path"<br> }]<br>} | {<br> "type":"data_router",<br> "dmaap_info": {<br> "location": "mtc00",<br> "delivery_url": "https://my-subscriber-app.dcae:8080/target-path", <br> "username": "sub-user",<br> "password": "sub-password",<br> "subscriber_id": "789012"}<br>} | "streams_publishes":{<br> …<br> },<br> "streams_subscribes":{<br> "dr_input":{<br> "type":"data_router",<br> "dmaap_info":{<br> "location":"mtc00",<br> "delivery_url":"https://my-subscriber-app.dcae:8080/target-path",<br> "username":"sub-user",<br> "password":"sub-password",<br> "subscriber_id":"789012"}<br> }<br>} + |