1. Answers
  2. Auto-forwarding messages between Azure Service Bus subscriptions

How do I auto-forward messages from one Azure Service Bus subscription to another?

In this guide, we will set up auto-forwarding of messages from one Azure Service Bus subscription to another using Pulumi. This is useful in scenarios where you want to route messages from one subscription to another for further processing or handling.

We will create the following resources:

  1. Azure Service Bus Namespace
  2. Azure Service Bus Topic
  3. Two Azure Service Bus Subscriptions
  4. Configure auto-forwarding on the first subscription to forward messages to the second subscription
import * as pulumi from "@pulumi/pulumi";
import * as azure from "@pulumi/azure-native";

// Create an Azure Resource Group
const resourceGroup = new azure.resources.ResourceGroup("resourceGroup", {
    resourceGroupName: "example-rg",
    location: "WestUS",
});

// Create a Service Bus Namespace
const namespace = new azure.servicebus.Namespace("namespace", {
    resourceGroupName: resourceGroup.name,
    namespaceName: "example-namespace",
    location: resourceGroup.location,
    sku: {
        name: "Standard",
        tier: "Standard",
    },
});

// Create a Service Bus Topic
const topic = new azure.servicebus.Topic("topic", {
    resourceGroupName: resourceGroup.name,
    namespaceName: namespace.name,
    topicName: "example-topic",
});

// Create the first Subscription
const subscription1 = new azure.servicebus.Subscription("subscription1", {
    resourceGroupName: resourceGroup.name,
    namespaceName: namespace.name,
    topicName: topic.name,
    subscriptionName: "subscription1",
    forwardTo: pulumi.interpolate`${namespace.name}/topics/${topic.name}/subscriptions/subscription2`,
});

// Create the second Subscription
const subscription2 = new azure.servicebus.Subscription("subscription2", {
    resourceGroupName: resourceGroup.name,
    namespaceName: namespace.name,
    topicName: topic.name,
    subscriptionName: "subscription2",
});

export const namespaceName = namespace.name;
export const topicName = topic.name;
export const subscription1Name = subscription1.name;
export const subscription2Name = subscription2.name;

Key Points

  • We created a resource group to contain all our resources.
  • We set up a Service Bus namespace to manage our messaging entities.
  • We created a topic to which messages will be sent.
  • We created two subscriptions to the topic.
  • We configured the first subscription to auto-forward messages to the second subscription.

Summary

In this guide, we successfully set up auto-forwarding of messages from one Azure Service Bus subscription to another using Pulumi. This setup ensures that messages sent to the first subscription are automatically forwarded to the second subscription for further processing.

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