How Do I Create a Firebase Cloud Messaging Topic in GCP Using Pulumi?

Introduction

This guide provides a step-by-step approach to creating a Firebase Cloud Messaging (FCM) topic in Google Cloud Platform (GCP) using Pulumi. By leveraging Pulumi, we will define and manage a Pub/Sub topic that can be utilized for messaging within Firebase Cloud Messaging. This process will be demonstrated using TypeScript.

Key Points:

• Utilize Pulumi for infrastructure management.
• Create a Pub/Sub topic to serve as an FCM topic.
• Implement the solution using 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;

Step-by-Step Explanation

1. Importing Modules: Start by importing the necessary modules from Pulumi and GCP to facilitate the creation and management of cloud resources.
2. Creating a Pub/Sub Topic: Define a new Pub/Sub topic named fcm-topic. This topic will be used for Firebase Cloud Messaging, acting as a channel for messages.
3. Exporting the Topic Name: Export the topic’s name to make it accessible for other components or services that may need to reference it.
4. Creating a Pub/Sub Subscription: Establish a subscription to the fcm-topic named fcm-subscription, setting an acknowledgment deadline of 10 seconds to manage message processing.
5. Exporting the Subscription Name: Similarly, export the subscription’s name for external access and integration.

Summary

In this guide, we successfully created a Pub/Sub topic and a corresponding subscription in GCP using Pulumi. This setup is tailored for Firebase Cloud Messaging, enabling message distribution to clients subscribed to the topic. By defining the infrastructure as code with Pulumi, we ensure efficient management and deployment of our messaging infrastructure.