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This document describes how to set up notifications for updates to parameters and parameter versions.

Parameter Manager integrates with Pub/Sub to provide event notifications for changes to both parameters and parameter versions. You can use these notifications to initiate workflows, such as restarting an application when a new parameter version is added, or notifying security engineers when a parameter is deleted. For more information on how to use these notifications to start workflows, see the Pub/Sub documentation.

Before you begin

1. To set up Parameter Manager, complete the following:

   • Create or use an existing project to hold your Parameter Manager resources.

   • If necessary, complete the steps mentioned in the Prepare your environment page.

2. To set up Pub/Sub, complete the following:

   • Create or use an existing project to hold your Pub/Sub resources.

   • If necessary, enable the Pub/Sub API.

3. Authenticate to Google Cloud using the following command:

       $ gcloud auth login --update-adc
       

Create Pub/Sub topics

Follow the Pub/Sub quickstart to create topics in your Pub/Sub project in the Google Cloud console. Alternatively, create topics in the Google Cloud CLI using the following command:

gcloud pubsub topics create "projects/PUBSUB_PROJECT_ID/topics/PUBSUB_TOPIC_NAME"

gcloud pubsub topics create "projects/PUBSUB_PROJECT_ID/topics/PUBSUB_TOPIC_NAME"

gcloud pubsub topics create "projects/PUBSUB_PROJECT_ID/topics/PUBSUB_TOPIC_NAME"

Retain the option to add a default subscription. Don't select any other option.

Create a sink to route log entries

Configure Cloud Logging to route log entries to your Pub/Sub topic in the project where the log entries originate. To do this, follow these steps:

1. In the Google Cloud console, go to the Log Router page.
2. If you use the search bar, select the result with the subheading Logging.
3. Click Create Sink, enter a name and description, and then click Next.
4. In the Sink Service menu, select Cloud Pub/Sub topic. Select your Pub/Sub topic, and then click Next.
5. Select the log entries to include in the sink, and click Next.
6. Optional: Select log entries to exclude.
7. Click Create Sink. A dialog appears with the message Sink created confirming the successful creation and permissions for routing matching log entries.
8. Grant the Pub/Sub Publisher role (roles/pubsub.publisher) to the sink's writer identity. Refer to Set destination permissions for details on obtaining the writer identity and granting roles.

Cloud Logging now sends log entries to your Pub/Sub topic.

Check logs published to Pub/Sub topic

Log entries are generated whenever you perform the following operations:

• Create a new parameter or parameter version within Parameter Manager.
• Retrieve the details of a specific parameter or parameter version using its identifier.
• List all parameters or parameter versions within a specified project.
• Modify an existing parameter or parameter version.
• Remove a parameter or parameter version.

To view log entries published to your Pub/Sub topic:

1. Open the subscriber for your topic.
2. Click Pull messages. The resulting list shows the log entries that match the filter criteria defined in your log sink.