How do I build a GCP Pub/Sub topic?

To create a Google Cloud Pub/Sub topic, we need to set up a few basic resources. The first resource defines the project where the topic will be created, and the second resource defines the Pub/Sub topic itself.

Here’s an example of how to create a Google Cloud Pub/Sub topic:

import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";

const exampleTopic = new gcp.pubsub.Topic("example_topic", {name: "my-topic"});
export const topicName = exampleTopic.name;
export const topicProject = exampleTopic.project;

Let’s break down what each part of the code does:

1. Provider Configuration: This configures the Google Cloud provider with the project and region. You’ll need to replace my-gcp-project with your actual Google Cloud project ID.

2. Pub/Sub Topic Resource: This creates a Pub/Sub topic named my-topic. You can change my-topic to any name that suits your needs.

3. Outputs: These export the names of the created Pub/Sub topic and the project in which it was created, which can be useful for referencing this topic in other parts of your infrastructure.

In summary, we’ve created a simple setup to define a Pub/Sub topic on Google Cloud, configured the provider, instantiated the topic resource, and provided outputs for easy reference in other parts of your infrastructure.