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authorLiam Fallon <liam.fallon@est.tech>2022-04-07 08:00:03 +0000
committerGerrit Code Review <gerrit@onap.org>2022-04-07 08:00:03 +0000
commitb9e91e7dc7cf49ae57e84b9e38e42b5b1b5a6b31 (patch)
tree7c9330241cf9c69b8359abe1e66e76a27ad44dbd /docs/clamp/acm/api-protocol/controlloop-participant-protocol.rst
parent75ba8d57c8a931a9f65011a31509ed9f4a42d341 (diff)
parente4552284dc71fdad3eb7c16f3c23d4c008726989 (diff)
Merge "Updating Clamp documentation"
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-.. This work is licensed under a Creative Commons Attribution 4.0 International License.
-
-.. _controlloop-participant-protocol-label:
-
-The CLAMP Control Loop Participant Protocol
-###########################################
-
-The CLAMP Control Loop Participant protocol is an asynchronous protocol that is used by the
-CLAMP runtime to coordinate life cycle management of Control Loop 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 control loop type
-information and common parameter values for its control loop types.
-
-.. image:: ../images/clamp-cl-participants/participant-registering.png
-
-
-De-registration is executed as a participant goes down.
-
-.. image:: ../images/clamp-cl-participants/participant-deregistration.png
-
-
-Control Loop Priming and De-Priming
------------------------------------
-
-When a control loop is primed, the portion of the Control Loop Type Definition and Common
-Property values for the participants of each participant type mentioned in the Control Loop
-Definition are sent to the participants.
-
-.. image:: ../images/clamp-cl-participants/controlloop-priming.png
-
-When a control loop is de-primed, the portion of the Control Loop Type Definition and Common
-Property values for the participants of each participant type mentioned in the Control Loop
-Definition are deleted on participants.
-
-.. image:: ../images/clamp-cl-participants/controlloop-depriming.png
-
-
-Control Loop Update
--------------------
-
-Control Loop Update handles creation, change, and deletion of control loops on participants.
-Change of control loops uses a semantic versioning approach and follow the semantics described
-on the page `4.1 Management of Control Loop Instance Configurations <management-cl-instance-configs>`.
-
-.. image:: ../images/clamp-cl-participants/controlloop-update.png
-
-The handling of a ControlLoopUpdate message in each participant is as shown below.
-
-.. image:: ../images/clamp-cl-participants/controlloop-update-msg.png
-
-Control Loop State Change
--------------------------
-
-This dialogue is used to change the state of Control Loops and their Control Loop Elements. The
-CLAMP Runtime sends a Control Loop State Change message on the control loop to all participants.
-Participants that have Control Loop Elements in that Control Loop attempt an update on the state
-of the control loop elements they have for that control loop, and report the result back.
-
-The *startPhase* in the `Definition of TOSCA fundamental Control Loop Types
-<https://github.com/onap/policy-clamp/blob/master/common/src/main/resources/tosca/ControlLoopTOSCAServiceTemplateTypes.yaml>`_
-is particularly important in control loop state changes because sometime the user wishes to control
-the order in which the state changes in Control Loop Elements in a control loop. In state changes
-from *UNITITIALISED* → *PASSIVE* and from *PASSIVE* → *RUNNING*, control loop elements are started in
-increasing order of their *startPhase*. In state changes from *RUNNING* → *PASSIVE* and from *PASSIVE*
-→ *UNITITIALISED*, control loop 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 a Control Loop State Change message on DMaaP to all participants in a particular Start Phase so,
-in each state change multiple Control Loop State Change messages are sent, one for each Start Phase in
-the control loop. If more than one Control Loop Element has the same Start Phase, those Control Loop
-Elements receive the same Control Loop 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 Control
-Loop State Change message matches the Start Phase of the Control Loop Element, the participant processes
-the State Change message. Otherwise the participant ignores the message.
-
-.. image:: ../images/clamp-cl-participants/controlloop-state-change.png
-
-The handling of a ControlLoopStateChange message in each participant is as shown below.
-
-.. image:: ../images/clamp-cl-participants/controlloop-state-change-msg.png
-
-Control Loop Monitoring and Reporting
--------------------------------------
-
-This dialogue is used as a heartbeat mechanism for participants, to monitor the status of Control Loop
-Elements, and to gather statistics on control loops. The ParticipantStatus message is sent periodically
-by each participant. The reporting interval for sending the message is configurable.
-
-.. image:: ../images/clamp-cl-participants/controlloop-monitoring.png
-
-
-Messages
-========
-
-The CLAMP Control Loop 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/controlloop/models/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 Control Loop Type
- Definitions
- * - ParticipantRegisterAck
- - CLAMP Runtime
- - Participant
- - Acknowledgement of Participant Registration
- - ParticipantId
- - The ID of this participant
- * -
- -
- -
- -
- - ParticipantType
- - The type of the participant, maps to the capabilities of the participant in Control Loop Type
- Definitions
- * -
- -
- -
- -
- - Result
- - Success/Fail
- * -
- -
- -
- -
- - Message
- - Message indicating reason for failure
- * - ParticipantUpdate
- - CLAMP Runtime
- - Participant
- - CLAMP Runtime sends Control Loop Element Definitions and Common Parameter Values to Participants
- - ParticipantDefinitionUpdateMap
- - Map with Participant ID as its key, each value on the map is a ControlLoopElementDefintionMap
- * -
- -
- -
- -
- - ControlLoopElementDefintionMap
- - List of ControlLoopElementDefinition values for a particular participant, keyed by its Control
- Loop Element Definition ID
- * -
- -
- -
- -
- - ControlLoopElementDefinition
- - A ControlLoopElementToscaServiceTemplate containing the definition of the Control Loop Element
- and a CommonPropertiesMap with the values of the common property values for Control Loop Elements
- of this type
- * -
- -
- -
- -
- - ControlLoopElementToscaServiceTemplate
- - The definition of the Control Loop 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
- - Acknowledgement of Participant Update
- - ParticipantId
- - The ID of this participant
- * -
- -
- -
- -
- - ParticipantType
- - The type of the participant, maps to the capabilities of the participant in Control Loop Type
- Definitions
- * -
- -
- -
- -
- - Result
- - Success/Fail
- * -
- -
- -
- -
- - Message
- - Message indicating 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 Control Loop Type
- Definitions
- * - ParticipantDeregisterAck
- - CLAMP Runtime
- - Participant
- - Acknowledgement of Participant Deegistration
- - ParticipantId
- - The ID of this participant
- * -
- -
- -
- -
- - ParticipantType
- - The type of the participant, maps to the capabilities of the participant in Control Loop Type
- Definitions
- * -
- -
- -
- -
- - Result
- - Success/Fail
- * -
- -
- -
- -
- - Message
- - Message indicating reason for failure
- * - ControlLoopUpdate
- - CLAMP Runtime
- - Participant
- - CLAMP Runtime sends Control Loop Element instances and Instance Specific Parameter Values for
- a Control Loop Instance to Participants
- - ControlLoopId
- - The name and version of the Control Loop
- * -
- -
- -
- -
- - ParticipantUpdateMap
- - Map with Participant ID as its key, each value on the map is a ControlLoopElementList
- * -
- -
- -
- -
- - ControlLoopElementList
- - List of ControlLoopElement values for the Control Loop
- * -
- -
- -
- -
- - ControlLoopElement
- - A ControlLoopElement, which contains among other things a PropertiesMap with the values of the
- property values for this Control Loop 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.
- * - ControlLoopUpdateAck
- - Participant
- - CLAMP Runtime
- - Acknowledgement of Control Loop Update
- - ParticipantId
- - The ID of this participant
- * -
- -
- -
- -
- - ParticipantType
- - The type of the participant, maps to the capabilities of the participant in Control Loop Type
- Definitions
- * -
- -
- -
- -
- - ControlLoopId
- - The name and version of the Control Loop
- * -
- -
- -
- -
- - ControlLoopResult
- - Holds a Result and Message for the overall operation on the participant and a map of Result
- and Message fields for each Control Loop Element of the control loop on this participant
- * -
- -
- -
- -
- - Result
- - Success/Fail
- * -
- -
- -
- -
- - Message
- - Message indicating reason for failure
- * - ControlLoopStateChange
- - CLAMP Runtime
- - Participant
- - CLAMP Runtime asks Participants to change the state of a Control Loop
- - ControlLoopId
- - The name and version of the Control Loop
- * -
- -
- -
- -
- - currentState
- - The current state of the Control Loop
- * -
- -
- -
- -
- - orderedState
- - The state that the Control Loop should transition to
- * -
- -
- -
- -
- - startPhase
- - The start phase to which this ControLoopStateChange message applies
- * - ControlLoopStateChangeAck
- - Participant
- - CLAMP Runtime
- - Acknowledgement of Control Loop State Change
- - ParticipantId
- - The ID of this participant
- * -
- -
- -
- -
- - ParticipantType
- - The type of the participant, maps to the capabilities of the participant in Control Loop Type
- Definitions
- * -
- -
- -
- -
- - ControlLoopId
- - The name and version of the Control Loop
- * -
- -
- -
- -
- - startPhase
- - The start phase to which this ControLoopStateChangeAck message applies
- * -
- -
- -
- -
- - ControlLoopResult
- - Holds a Result and Message for the overall operation on the participant and a map of Result and
- Message fields for each Control Loop Element of the control loop on this participant
- * -
- -
- -
- -
- - Result
- - Success/Fail
- * -
- -
- -
- -
- - Message
- - Message indicating 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, Control Loop Status, and Control
- Loop Statistics
- - ParticipantId
- - The ID of this participant
- * -
- -
- -
- -
- - ParticipantType
- - The type of the participant, maps to the capabilities of the participant in Control Loop
- 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 up time, or messages processed. Can include participant
- specific data in a string blob that is opaque to CLAMP
- * -
- -
- -
- -
- - ControlLoopInfoMap
- - A map of ControlLoopInfo types indexed by ControlLoopId, one entry for each control loop
- running on the participant
- * -
- -
- -
- -
- - ControlLoopInfo
- - The ControlLoopStatus and ControlLoopStatistics for a given control loop
- * -
- -
- -
- -
- - ControlLoopStatus
- - The current status of the control loop for monitoring
- * -
- -
- -
- -
- - ControlLoopStatistics
- - Statistics on the control loop such as up time, or messages processed. Can include participant
- specific data in a string blob that is opaque to CLAMP
-
-
-End of Document