CloudEvents

As explained in Platform Engineering on Kubernetes

CloudEvents is a specification for describing event data in a common, interoperable format independent of the transport used to carry it.

CloudEvents standardizes event data in a common, interoperable format independent of the transport carrying it. It provides a thin envelope with required metadata and a payload containing the event data. section 9.1.1 section 9.2

Developers can emit and consume events by using the specification to identify what an event concerns, while choosing transports such as HTTP, AMQP, Kafka, NATS, MQTT, JSON, XML, websockets, or webhooks. section 9.2

CloudEvents fits an event-driven platform workflow by:

• Wrapping information from different tools and systems in a shared format for downstream consumption and metric calculation. section 9.1.1
• Supporting integrations with Tekton, Dapr PubSub, Argo Events, Knative Eventing, and cloud services such as Google Cloud Eventarc and Alibaba Cloud EventBridge. section 9.2
• Using the CloudEvents SDK with Dapr PubSub to verify an event type and retrieve its payload. section 9.2

Figure 9.5 CloudEvents, a simple envelope to wrap our events data

Inspect the envelope structure showing how required metadata surrounds the event payload. section 9.2

How Platform Engineering on Kubernetes covers it

How deep it goes

Defines a thin envelope, required metadata, payload, and transport bindings without detailing every receiving or emitting implementation.

Examples

Uses Dapr PubSub and the CloudEvents SDK to verify event types and retrieve payloads.

What it assumes

Assumes event-producing and event-consuming systems, while defining metadata, payload, and transport bindings from the integration problem.

What you can do after

Apply it via the CloudEvents SDK to emit or consume transport-independent events and access their payloads.

How it connects

Connects event producers and consumers with CDEvents, Tekton, Dapr PubSub, Argo Events, Knative Eventing, and transport protocols.

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Also explained in

• 

  liveBookmanning.com
  The Design of Web APIs, Second EditionCloudEvents is a protocol-agnostic standard specification for describing and exchanging event data across different technologies.
• 

  liveBookmanning.com
  Google Anthos in ActionCloudEvents is an open standard for describing event data in a common, interoperable format.

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Related concepts

• event adapterproduced by · An event adapter is a component that understands a source-specific event format and translates it into CloudEvents.
• CDEventsimplemented by · CDEvents is an open specification for interoperable events representing activities in software delivery and continuous integration and delivery.
• webhookused by · A webhook is an HTTP callback mechanism that sends event-related information to a configured endpoint when a specified event occurs.
• data collectionproduced by · Data collection is the process of systematically acquiring or gathering information, observations, or measurements from one or more sources for a defined purpose.

This explainer was generated by Manning's knowledge graph from the text of Platform Engineering on Kubernetes. The section links point to the parts of the book it draws on.