Pubsub dlq enabled remediation

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Using Python

To remediate the misconfiguration of PubSub Subscriptions not having Dead Letter Queue enabled in GCP using Python, follow these steps:

Import the necessary libraries:

from google.cloud import pubsub_v1
from google.api_core import retry

Set the project ID and subscription name:

project_id = "your-project-id"
subscription_name = "your-subscription-name"

Create the PubSub client and subscription object:

subscriber = pubsub_v1.SubscriberClient()
subscription_path = subscriber.subscription_path(project_id, subscription_name)

Check if the subscription already has a dead letter policy:

subscription = subscriber.get_subscription(request={"subscription": subscription_path})
if subscription.dead_letter_policy:
    print("Dead letter policy already exists.")
    exit()

If the subscription does not have a dead letter policy, create one:

dead_letter_topic = "projects/{}/topics/{}".format(project_id, "your-dead-letter-topic-name")
dead_letter_policy = {
    "dead_letter_topic": dead_letter_topic,
    "max_delivery_attempts": 10,
}
update_mask = {"paths": ["dead_letter_policy"]}
subscription.dead_letter_policy = dead_letter_policy

Update the subscription with the new dead letter policy:

update_request = {
    "subscription": subscription,
    "update_mask": update_mask,
}
response = subscriber.update_subscription(request=update_request)
print("Dead letter policy has been enabled for the subscription.")

Handle any errors that may occur during the update process:

def handle_error(exception):
    print(f"Error occurred: {exception}")
    return retry.RetryResult.RETRY_ON_EXCEPTION

retry_settings = retry.Retry(deadline=60, predicate=handle_error)
response = subscriber.update_subscription(request=update_request, retry=retry_settings)

Putting it all together, here’s the complete code:

from google.cloud import pubsub_v1
from google.api_core import retry

project_id = "your-project-id"
subscription_name = "your-subscription-name"

subscriber = pubsub_v1.SubscriberClient()
subscription_path = subscriber.subscription_path(project_id, subscription_name)

subscription = subscriber.get_subscription(request={"subscription": subscription_path})
if subscription.dead_letter_policy:
    print("Dead letter policy already exists.")
    exit()

dead_letter_topic = "projects/{}/topics/{}".format(project_id, "your-dead-letter-topic-name")
dead_letter_policy = {
    "dead_letter_topic": dead_letter_topic,
    "max_delivery_attempts": 10,
}
update_mask = {"paths": ["dead_letter_policy"]}
subscription.dead_letter_policy = dead_letter_policy

update_request = {
    "subscription": subscription,
    "update_mask": update_mask,
}

def handle_error(exception):
    print(f"Error occurred: {exception}")
    return retry.RetryResult.RETRY_ON_EXCEPTION

retry_settings = retry.Retry(deadline=60, predicate=handle_error)
response = subscriber.update_subscription(request=update_request, retry=retry_settings)

print("Dead letter policy has been enabled for the subscription.")

Note: Replace the placeholders “your-project-id”, “your-subscription-name”, and “your-dead-letter-topic-name” with your actual project ID, subscription name, and dead letter topic name, respectively.

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Pubsub dlq enabled remediation

Triage and Remediation

Remediation

GCP Introduction

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GCP Misconfigurations

Resources

GCP Threats

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Triage and Remediation

Remediation