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1、CNCF CloudEvents無服務(wù)器互操作平臺介紹Cloud Events: A Step Towards Serverless InteropCloudEvents: HistoryCNCF Technical Oversight Committee initiated Serverless WG (mid-2017)WhitepaperOverview of technologyState of ecosystemRecommendations for possible CNCF next stepsLandscapeCloudEventsProject started Dec 201
2、7CNCF Sandbox project approved May 2018What are Events?An occurrence is the capture of astatement of fact during the operation of a software systemAn event is a data record expressing anoccurrence and its contextAn action is executed, when it is notifiedabout the occurrence by receiving theeventThe
3、occurrence is decoupled from the actionOccurrenceActionEventCloudEvents: Why?ProblemWe live in a multi-cloud and multi-service worldEvents within a cloud are well known but going across clouds need more standardization on the messagesUse casesHow do you transit events between clouds and services?Be
4、able to route events efficiently without knowing the actual payloadWell known format for transmitting metadata about eventsCloudEvents: GoalsInteroperability : Facilitate integrations across platformsFirst step towards portability and interop of functionsHow?Define minimal common metadata across eve
5、ntsLeave the event business logic format & processing to the applicationNo sensitive data within the CloudEvents metadataDefine mapping for popular serializations and transportsCloudEvents: OverviewSpecification - minimal/consistent metadataIDSourceSpecVersionTypeDataContentEncoding of the payloadDa
6、taContentType of the payloadSchema URL of the payloadSubjectTimeTransport bindings - how to serialize in JSON, HTTP, MQTT, Just enough to help route to the consuming business processing logicCloudEvents: ExampleHTTP - StructuredPOST /event HTTP/1.0 Host: Content-Type: application/cloudevents+jsonspe
7、cversion: 0.3, type: com.bigco.newItem,source: /repo,id: 610b6dd4-c85d-417b-b58f-3771e532,datacontenttype: application/json, data: action: newItem,itemID: 93HTTP - BinaryPOST /event HTTP/1.0 Host: Content-Type: application/jsonce-specversion: 0.3ce-type: com.bigco.newItemce-source: /repoce-id: 610b6
8、dd4-c85d-417b-b58f-3771e532action: newItem,itemID: 93CloudEvents: New in v0.3V0.3 - released June 13, 2019New attribute: subjectcontenttype is renamed datacontenttypeNew extensionsdataref (claim check pattern)BatchingIs handled by transportsAdded specification for batching with HTTP+JSONCloudEvents:
9、 DeliverablesCloudEvents Specification define the metadata Serialization Rules SpecificationsJSON event formatAMQP event formatProtobuf event formatTransport Bindings SpecificationsHTTP binary and structuredMQTT, AMQP, NATS, Web-hooksPointers to proprietary transport bindingsPrimer SDKsGo-lang, Java
10、script, Python, Java, C-Sharp, RubyExtensionsCloudEvents: StatusReleasesv0.3 - Released on June 13, 2019Dont let the version number fool you. Its more like v0.9Hoping for v1.0 within weeks/month(s)Will be asking for CNCF incubator status soonAdoptionMicrosoft, S, SAP and others have supportKnative -
11、 basis for eventing infrastructureTransport/data agnostic filteringOther BIG cloud providers have plansAfter v1.0Shift focus back to Serverless WG / Workflow / other possible areas of interopCloudEvents: Demo Time!Demo: ACRIS Semantic Model“The Semantic Model, coupled with the CloudEvents format, ca
12、n support interoperable, event-driven systems that can re-act intelligently to real-time state changes such as an aircraft landing or fulfilled order. With the use of event brokers, edge-to-cloud computing and AI, these events can be detected faster and analyzed in greater detail.”Segun Alayande Heathrow AirportCloudEvents: Airport Cof
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