Webhook

As explained in Effective Platform Engineering

A webhook is an HTTP callback mechanism that delivers event notifications from one system to another when specified events occur.

A webhook delivers event notifications from one system to another, letting a subscriber react when specified events occur. In platform engineering, GitHub can publish repository events while tools such as Flux or ArgoCD subscribe and trigger Helm upgrades. section 9.3

Webhook-based event delivery supports platform scale by providing:

• Decoupled services that develop and deploy independently. section 9.3
• Asynchronous processing that distributes high event volumes across services. section 9.3
• Near-real-time integration with internal and external systems. section 9.3

Upgrade conformance testing

When a cluster component upgrade reaches preview, an inbound CI webhook can trigger application conformance tests. Successful tests can automatically close the related Jira ticket; failures can attach logs and pipeline links, reducing manual coordination and increasing release confidence. section 9.3.4

Figure 9.12 The consumer API can subscribe to specific platform deployment events, and then inbound workflow triggers could be created, allowing a central consumer plugin (e.g., the CircleCI consumer) to trigger and coordinate deployment workflows seamlessly.

Use the workflow diagram to trace platform deployment events from subscription through CI-triggered deployment coordination. section 9.3.4

How Effective Platform Engineering covers it

How deep it goes

Explains webhook publication, subscription, and operational benefits, but stops short of protocol-level implementation details.

Examples

Uses repository pushes, tags, cluster upgrades, CI tests, deployment workflows, logs, and Jira tickets as concrete event artifacts.

What it assumes

Assumes familiarity with Git repositories, Helm upgrades, CI systems, Kubernetes platforms, and Jira-based workflows.

What you can do after

Operate/configure subscribers that trigger upgrades, tests, and issue updates from platform events.

How it connects

Connects event-driven architecture with GitHub, Git repositories, Helm, Flux, ArgoCD, CI pipelines, and Jira.

liveBookmanning.com

Read Effective Platform Engineering on liveBook Get the book at manning.com

Also explained in

• 

  liveBookmanning.com
  The Design of Web APIs, Second EditionA webhook call is an HTTP request sent automatically to notify a consumer when an event occurs.
• 

  liveBookmanning.com
  Contract Testing in ActionA webhook is an HTTP callback that delivers an event notification from one system to another when a specified event occurs.
• 

  liveBookmanning.com
  Platform Engineering on KubernetesA webhook is an HTTP callback that allows one system to notify another system when an event occurs.
• 

  liveBookmanning.com
  Secure APIsA webhook is an HTTP callback that delivers event notifications to a user-specified URL.
• 

  liveBookmanning.com
  Effective Conversational AIA webhook is an API endpoint that is invoked automatically when a specified event occurs in another system.

Compare how 6 books explain webhook →

Related concepts

• contractkind of · An API contract is a specification of the operations, data, and behavioral expectations that govern interactions between software components.
• business problemaddresses · A business problem is an organizational need, objective, constraint, or challenge that a proposed solution is intended to address.
• Pact Broker CLIproduced by · A command-line interface for publishing and managing Pact contracts and interacting with a Pact Broker.
• triggerkind of · A trigger is an event, condition, input, or schedule that causes or signals an action, process, or state transition to begin or proceed.
• pollingaddresses · Polling is the repeated checking or querying of a resource, system, or condition, often at intervals, to detect data, events, or state changes.
• JSONuses · JSON is a standardized, language-independent text format for representing structured data using objects, arrays, strings, numbers, Boolean values, and null.

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