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diff --git a/docs/clamp/acm/api-protocol/acm-participant-protocol.rst b/docs/clamp/acm/api-protocol/acm-participant-protocol.rst new file mode 100644 index 00000000..449e2096 --- /dev/null +++ b/docs/clamp/acm/api-protocol/acm-participant-protocol.rst @@ -0,0 +1,483 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International License. + +.. _acm-participant-protocol-label: + +The ACM Automation Composition Participant Protocol +################################################### + +The CLAMP Automation Composition protocol is an asynchronous protocol that is used by the CLAMP +runtime to coordinate lifecycle management of Automation Composition instances. The protocol +supports the functions described in the sections below. + + +Protocol Dialogues +================== + +The protocol supports the dialogues described below. + +Participant Registration and De-Registration +-------------------------------------------- + +Registration when a participant comes up and update of participant with Automation Composition type +information and common parameter values for its Automation Composition types. + +.. image:: ../images/acm-participants-protocol/participant-registering.png + + +De-registration is executed as a participant goes down. + +.. image:: ../images/acm-participants-protocol/participant-deregistration.png + + +Automation Composition Priming and De-Priming +--------------------------------------------- + +When an Automation Composition is primed, the portion of the Automation Composition Type Definition +and Common Property values for the participants of each participant type mentioned in the +Automation Composition Definition are sent to the participants. + +.. image:: ../images/acm-participants-protocol/acm-priming.png + +When an Automation Composition is de-primed, the portion of the Automation Composition Type +Definition and Common Property values for the participants of each participant type mentioned in +the Automation Composition Definition are deleted on participants. + +.. image:: ../images/acm-participants-protocol/acm-depriming.png + + +Automation Composition Update +----------------------------- + +Automation Composition Update handles creation, change, and deletion of Automation Compositions on +participants. Change of Automation Compositions uses a semantic versioning approach and follows the +semantics described on the page :ref:`4.1 Management of Automation Composition Instance +Configurations <management-acm-instance-configs>`. + +.. image:: ../images/acm-participants-protocol/acm-update.png + +The handling of an *ACMUpdate* message in each participant is as shown below. + +.. image:: ../images/acm-participants-protocol/acm-update-msg.png + +Automation Composition State Change +----------------------------------- + +This dialogue is used to change the state of Automation Compositions and their Automation +Composition Elements. The CLAMP Runtime sends an Automation Composition State Change message on the +Automation Composition to all participants. Participants that have Automation Composition Elements +in that Automation Composition attempt an update on the state of the Automation Composition +elements they have for that Automation Composition, and report the result back. + +The *startPhase* in the `Definition of TOSCA fundamental Automation Composition Types +<https://github.com/onap/policy-clamp/blob/master/common/src/main/resources/tosca/AutomationCompositionTOSCAServiceTemplateTypes.yaml>`_ +is particularly important in Automation Composition state changes because sometimes the user wishes +to control the order in which the state changes in Automation Composition Elements in an Automation +Composition. In-state changes from *UNITITIALISED → PASSIVE* and from *PASSIVE → RUNNING*, +Automation Composition elements are started in increasing order of their startPhase. In-state +changes from *RUNNING → PASSIVE* and from *PASSIVE → UNITITIALISED*, Automation Composition +elements are started in decreasing order of their *startPhase*. + +The CLAMP runtime controls the state change process described in the diagram below. The CLAMP +runtime sends an Automation Composition state change message on DMaaP to all participants in a +particular start phase so, in each state change multiple Automation Composition State Change +messages are sent, one for each start phase in the Automation Composition. If more than one +Automation Composition Element has the same start phase, those Automation Composition Elements +receive the same Automation Composition State Change message from DMaaP and start in parallel. + +The Participant reads each State Change Message it sees on DMaaP. If the start phase on the +Automation Composition State Change message matches the Start Phase of the Automation Composition +Element, the participant processes the state change message. Otherwise, the participant ignores the +message. + +.. image:: ../images/acm-participants-protocol/acm-state-change.png + +The handling of an ACMStateChange message in each participant is as shown below. + +.. image:: ../images/acm-participants-protocol/acm-state-change-msg.png + +Automation Composition Monitoring and Reporting +----------------------------------------------- + +This dialogue is used as a heartbeat mechanism for participants, to monitor the status of +Automation Composition Elements, and to gather statistics on Automation Compositions. The +*ParticipantStatus* message is sent periodically by each participant. The reporting interval for +sending the message is configurable. + +.. image:: ../images/acm-participants-protocol/acm-monitoring.png + + +Messages +======== + +The CLAMP Automation Composition Participant Protocol uses the following messages. The +descriptions below give an overview of each message. For the precise definition of the messages, +see the `CLAMP code at Github +<https://github.com/onap/policy-clamp/tree/master/models/src/main/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant>`_ +. All messages are carried on DMaaP. + + +.. list-table:: + :widths: 15 10 10 15 15 35 + :header-rows: 1 + + * - Message + - Source + - Target + - Purpose + - Important Fields + - Field Descriptions + * - ParticipantRegister + - Participant + - CLAMP Runtime + - Participant registers with the CLAMP runtime + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - ParticipantRegisterAck + - CLAMP Runtime + - Participant + - Acknowledgment of Participant Registration + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - + - + - + - + - Result + - Success/Fail + * - + - + - + - + - Message + - A message indicating the reason for failure + * - ParticipantUpdate + - CLAMP Runtime + - Participant + - CLAMP Runtime sends Automation Composition Element Definitions and Common Parameter Values + to Participants + - ParticipantDefinitionUpdateMap + - Map with Participant ID as its key, each value on the map is an ACMElementDefintionMap + * - + - + - + - + - ACMElementDefintionMap + - List of ACMElementDefinition values for a particular participant, keyed by its Automation + Composition Element Definition ID + * - + - + - + - + - ACMElementDefinition + - An ACMElementToscaServiceTemplate containing the definition of the Automation Composition + Element and a CommonPropertiesMap with the values of the common property values for + Automation Composition Elements of this type + * - + - + - + - + - ACMElementToscaServiceTemplate + - The definition of the Automation Composition Element in TOSCA + * - + - + - + - + - CommonPropertiesMap + - A <String, String> map indexed by the property name. Each map entry is the serialized value + of the property, which can be deserialized into an instance of the type of the property. + * - ParticipantUpdateAck + - Participant + - CLAMP Runtime + - Acknowledgment of Participant Update + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - + - + - + - + - Result + - Success/Fail + * - + - + - + - + - Message + - A message indicating the reason for failure + * - ParticipantDeregister + - Participant + - CLAMP Runtime + - Participant deregisters with the CLAMP runtime + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - ParticipantDeregisterAck + - CLAMP Runtime + - Participant + - Acknowledgment of Participant Deegistration + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - + - + - + - + - Result + - Success/Fail + * - + - + - + - + - Message + - A message indicating the reason for failure + * - ACMUpdate + - CLAMP Runtime + - Participant + - CLAMP Runtime sends Automation Composition Element instances and Instance Specific Parameter + Values for an Automation Composition Instance to Participants + - ACMId + - The name and version of the Automation Composition + * - + - + - + - + - ParticipantUpdateMap + - Map with Participant ID as its key, each value on the map is an ACMElementList + * - + - + - + - + - ACMElementList + - List of ACMElement values for the Automation Composition + * - + - + - + - + - ACMElement + - An ACMElement, which contains among other things a PropertiesMap with the values of the + property values for this Automation Composition Element instance and a + ToscaServiceTemplateFragment with extra concept definitions and instances that a participant + may need. + * - + - + - + - + - PropertiesMap + - A <String, String> map indexed by the property name. Each map entry is the serialized value + of the property, which can be deserialized into an instance of the type of the property. + * - + - + - + - + - ToscaServiceTemplateFragment + - A well-formed TOSCA service template containing extra concept definitions and instances that + a participant may need. For example, the Policy Participant may need policy type definitions + or policy instances to be provided if they are not already stored in the Policy Framework. + * - ACMUpdateAck + - Participant + - CLAMP Runtime + - Acknowledgment of Automation Composition Update + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - + - + - + - + - ACMId + - The name and version of the Automation Composition + * - + - + - + - + - ACMResult + - Holds a Result and Message for the overall operation on the participant and a map of Result + and Message fields for each Automation Composition Element of the Automation Composition on + this participant + * - + - + - + - + - Result + - Success/Fail + * - + - + - + - + - Message + - A message indicating the reason for failure + * - ACMStateChange + - CLAMP Runtime + - Participant + - CLAMP Runtime asks Participants to change the state of an Automation Composition + - ACMId + - The name and version of the Automation Composition + * - + - + - + - + - currentState + - The current state of the Automation Composition + * - + - + - + - + - orderedState + - The state that the Automation Composition should transition to + * - + - + - + - + - startPhase + - The start phase to which this ACMStateChange message applies + * - ACMStateChangeAck + - Participant + - CLAMP Runtime + - Acknowledgment of Automation Composition State Change + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - + - + - + - + - ACMId + - The name and version of the Automation Composition + * - + - + - + - + - startPhase + - The start phase to which this ACMStateChangeAck message applies + * - + - + - + - + - ACMResult + - Holds a Result and Message for the overall operation on the participant and a map of Result + and Message fields for each Automation Composition Element of the Automation Composition on + this participant + * - + - + - + - + - Result + - Success/Fail + * - + - + - + - + - Message + - A message indicating the reason for failure + * - ParticipantStatusReq + - CLAMP Runtime + - Participant + - Request that the specified participants return a ParticipantStatus message immediately + - ParticipantId + - The ID of this participant, if not specified, all participants respond. + * - ParticipantStatus + - Participant + - CLAMP Runtime + - Periodic or on-demand report for heartbeat, Participant Status, Automation Composition + Status, and Automation Composition Statistics + - ParticipantId + - The ID of this participant + * - + - + - + - + - ParticipantType + - The type of the participant; maps to the capabilities of the participant in Automation + Composition Type Definitions + * - + - + - + - + - ParticipantDefinitionUpdateMap (returned in repsonse to ParticipantStatusReq only) + - See ParticipantUpdate message above for definition of this field + * - + - + - + - + - ParticipantStatus + - The current status of the participant for monitoring + * - + - + - + - + - ParticipantStatistics + - Statistics on the participant such as uptime, or messages processed. Can include participant + specific data in a string blob that is opaque to CLAMP + * - + - + - + - + - ACMInfoMap + - A map of ACMInfo types indexed by ACMId, one entry for each Automation Composition + running on the participant + * - + - + - + - + - ACMInfo + - The ACMStatus and ACMStatistics for a given Automation Composition + * - + - + - + - + - ACMStatus + - The current status of the Automation Composition for monitoring + * - + - + - + - + - ACMStatistics + - Statistics on the Automation Composition such as uptime, or messages processed. Can include + participant specific data in a string blob that is opaque to CLAMP + + +End of Document |