概述

Overview on setting up of pub/sub components for Dapr

Dapr integrates with pub/sub message buses to provide applications with the ability to create event-driven, loosely coupled architectures where producers send events to consumers via topics.

Dapr supports the configuration of multiple, named, pub/sub components per application. Each pub/sub component has a name and this name is used when publishing a message topic. Read the API reference for details on how to publish and subscribe to topics.

Pub/sub components are extensible. A list of support pub/sub components is here and the implementations can be found in the components-contrib repo.

Component files

A pub/sub is described using a Component file:

apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
  name: pubsub
  namespace: default
spec:
  type: pubsub.<NAME>
  version: v1
  metadata:
  - name: <KEY>
    value: <VALUE>
  - name: <KEY>
    value: <VALUE>
...

The type of pub/sub is determined by the type field, and properties such as connection strings and other metadata are put in the .metadata section. Even though metadata values can contain secrets in plain text, it is recommended you use a secret store using a secretKeyRef.

Topic creation

Depending on the pub/sub message bus you are using and how it is configured, topics may be created automatically. Even if the message bus supports automatic topic creation, it is a common governance practice to disable it in production environments. You may still need to use a CLI, admin console, or request form to manually create the topics required by your application.

Visit this guide for instructions on configuring and using pub/sub components.

Overview

概述

Component files

Topic creation

Related links