How do I create a Firebase Cloud Messaging topic in GCP using Pulumi?

In this guide, we will create a Firebase Cloud Messaging (FCM) topic in Google Cloud Platform (GCP) using Pulumi. We will define a Pub/Sub topic which can be used for messaging in Firebase Cloud Messaging.

Key Points:

• We will use Pulumi to define and manage our infrastructure.
• We will create a Pub/Sub topic which can be used as an FCM topic.
• The code will be written in TypeScript.

Below is the complete Pulumi program to create a Pub/Sub topic in GCP:

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

// Create a Pub/Sub Topic
const topic = new gcp.pubsub.Topic("fcm-topic", {
    name: "fcm-topic",
});

// Export the name of the topic
export const topicName = topic.name;

// Create a Pub/Sub Subscription
const subscription = new gcp.pubsub.Subscription("fcm-subscription", {
    name: "fcm-subscription",
    topic: topic.name,
    ackDeadlineSeconds: 10,
});

// Export the name of the subscription
export const subscriptionName = subscription.name;

Explanation:

1. Importing Modules: We import the necessary modules from Pulumi and GCP.
2. Creating a Pub/Sub Topic: We create a new Pub/Sub topic named fcm-topic which will be used for Firebase Cloud Messaging.
3. Exporting the Topic Name: We export the name of the topic so it can be referenced elsewhere.
4. Creating a Pub/Sub Subscription: We create a subscription to the topic named fcm-subscription with an acknowledgment deadline of 10 seconds.
5. Exporting the Subscription Name: We export the name of the subscription.

Summary:

In this guide, we created a Pub/Sub topic and a subscription in GCP using Pulumi. This topic can be used for Firebase Cloud Messaging, allowing you to send messages to clients subscribed to this topic. The Pulumi program defines the infrastructure as code, making it easy to manage and deploy.