Message retention and acknowledgment in GCP - Mini Project: Build & Apply

Message retention and acknowledgment

📖 Scenario: You are setting up a Google Cloud Pub/Sub topic and subscription for a simple messaging system. You want to control how long messages are kept and ensure messages are acknowledged properly to avoid duplicates.

🎯 Goal: Build a Pub/Sub topic and subscription with a message retention duration of 7 days and configure the subscription to require explicit message acknowledgment.

📋 What You'll Learn

Create a Pub/Sub topic named my-topic

Create a Pub/Sub subscription named my-subscription attached to my-topic

Set the message retention duration of the topic to 7 days

Configure the subscription to require explicit acknowledgment of messages

💡 Why This Matters

🌍 Real World

Message retention and acknowledgment settings are crucial for reliable message processing in distributed systems, ensuring no messages are lost or processed multiple times.

💼 Career

Understanding Pub/Sub configuration is important for cloud engineers and developers working with event-driven architectures and asynchronous communication.

1

Create the Pub/Sub topic

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

GCP

# Create the Pub/Sub topic named my-topic
# Your code here

Need a hint?

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

2

Create the Pub/Sub subscription

Create a Pub/Sub subscription named my-subscription attached to the topic my-topic using the command gcloud pubsub subscriptions create my-subscription --topic=my-topic.

GCP

gcloud pubsub topics create my-topic
# Create the subscription named my-subscription attached to my-topic
# Your code here

Need a hint?

Use the gcloud pubsub subscriptions create command with the --topic flag.

3

Set message retention duration

Update the topic my-topic to set the message retention duration to 7 days (604800 seconds) using the command gcloud pubsub topics update my-topic --message-retention-duration=604800s.

GCP

gcloud pubsub topics create my-topic
gcloud pubsub subscriptions create my-subscription --topic=my-topic
# Set message retention duration to 7 days for my-topic
# Your code here

Need a hint?

Use the gcloud pubsub topics update command with the --message-retention-duration flag set to 604800s.

4

Configure acknowledgment requirement

Ensure the subscription my-subscription requires explicit acknowledgment by setting the --ack-deadline to 10 seconds using the command gcloud pubsub subscriptions update my-subscription --ack-deadline=10.

GCP

gcloud pubsub topics create my-topic
gcloud pubsub subscriptions create my-subscription --topic=my-topic
gcloud pubsub topics update my-topic --message-retention-duration=604800s
# Set acknowledgment deadline to 10 seconds for my-subscription
# Your code here

Need a hint?

Use the gcloud pubsub subscriptions update command with the --ack-deadline flag set to 10 seconds.