Why messaging matters in GCP - See It in Action

Why messaging matters

📖 Scenario: You are working on a cloud application that needs to send messages between different parts of the system reliably. Messaging helps different services talk to each other without losing information.

🎯 Goal: Build a simple Google Cloud Pub/Sub setup with a topic and a subscription to understand how messaging works in cloud infrastructure.

📋 What You'll Learn

Create a Pub/Sub topic named my-topic

Create a subscription named my-subscription to my-topic

Configure the subscription to use pull delivery type

Ensure the setup follows Google Cloud best practices for messaging

💡 Why This Matters

🌍 Real World

Messaging systems like Pub/Sub help cloud services communicate reliably without losing messages, even if parts of the system are busy or offline.

💼 Career

Understanding messaging is key for cloud architects and developers to build scalable, decoupled applications that handle data and events efficiently.

1

Create a Pub/Sub topic

Create a Pub/Sub topic named my-topic using the Google Cloud SDK command gcloud pubsub topics create my-topic.

GCP

# Run the command to create the topic
# Your code here

Need a hint?

Use the gcloud pubsub topics create command followed by the topic name.

2

Create a subscription to the topic

Create a subscription named my-subscription to the topic my-topic using the command gcloud pubsub subscriptions create my-subscription --topic=my-topic --ack-deadline=10.

GCP

gcloud pubsub topics create my-topic
# Run the command to create the subscription
# Your code here

Need a hint?

Use gcloud pubsub subscriptions create with the --topic flag to link the subscription.

3

Configure subscription for pull delivery

Ensure the subscription my-subscription is configured for pull delivery by adding the flag --message-retention-duration=600s to the subscription creation command.

GCP

gcloud pubsub topics create my-topic
# Update the subscription creation command to include message retention duration
# Your code here

Need a hint?

Add --message-retention-duration=600s to keep messages for 10 minutes.

4

Verify the Pub/Sub setup

List the topics and subscriptions to verify that my-topic and my-subscription exist using gcloud pubsub topics list and gcloud pubsub subscriptions list.

GCP

gcloud pubsub topics create my-topic
gcloud pubsub subscriptions create my-subscription --topic=my-topic --ack-deadline=10 --message-retention-duration=600s
# Run commands to list topics and subscriptions
# Your code here

Need a hint?

Use gcloud pubsub topics list and gcloud pubsub subscriptions list to check your setup.