Manage dry run configurations

This page describes how you can manage the dry run configuration for your service perimeters. For information about managing service perimeters generally, see Managing service perimeters.

Before you begin

• Read Overview of VPC Service Controls

• Read Dry run mode

• Set your default access policy for using the gcloud command-line tool.

  -or-

  Get the name of your policy. The policy name is required for commands using the gcloud command-line tool and making API calls. If you set a default access policy, you do not need to specify the policy for the gcloud command-line tool.

Enforcing a dry run configuration

When you're satisfied with the dry run configuration for a service perimeter, you can enforce that configuration. When a dry run configuration is enforced, it replaces the current enforced configuration for a perimeter, if one exists. If an enforced version of the perimeter doesn't exist, the dry run configuration is used as the initial enforced configuration for the perimeter.

Note: You can only enforce a dry run configuration that has been modified. If the dry run configuration has not been changed, you cannot enforce it. In the Google Cloud console, if the dry run configuration has not been modified, the Enforce button will not be visible on the VPC Service Perimeter Detail page.

After you update a service perimeter, it may take up to 30 minutes for the changes to propagate and take effect. During this time, the perimeter might block requests with the following error message: Error 403: Request is prohibited by organization's policy.

Console

1. In the Google Cloud console navigation menu, click Security, and then click VPC Service Controls.

   Go to the VPC Service Controls page

2. At the top of the VPC Service Controls page, click Dry Run Mode.

3. In the list of service perimeters, click the name of the service perimeter that you want to enforce.

4. On the VPC Service Perimeter Detail page, in the Dry run config section, click Enforce.

5. When you are asked to confirm that you want to overwrite your existing enforced configuration, click Enforce.

gcloud

You can use the gcloud command-line tool to enforce the dry configuration for an individual perimeter, as well as for all of your perimeters simultaneously.

Enforce one dry run configuration

To enforce the dry run configuration for a single perimeter, use the dry-run enforce command:

gcloud access-context-manager perimeters dry-run enforce PERIMETER_NAME \
  [--policy=POLICY_NAME]

Where:

• PERIMETER_NAME is the name of the service perimeter that you want to obtain details about.

• POLICY_NAME is the name of your organization's access policy. This value is required only if you haven't set a default access policy.

Enforce all dry run configurations

To enforce the dry run configuration for all of your perimeters, use the dry-run enforce-all command:

gcloud access-context-manager perimeters dry-run enforce-all \
  [--etag=ETAG]
  [--policy=POLICY_NAME]

Where:

• PERIMETER_NAME is the name of the service perimeter that you want to obtain details about.

• ETAG is a string that represents the target version of your organization's access policy. If you do not include an etag, the enforce-all operation targets the latest version of the your organization's access policy.

  To obtain the latest etag of your access policy, list your access policies.

• POLICY_NAME is the name of your organization's access policy. This value is required only if you haven't set a default access policy.

API

To enforce the dry run configuration for all of your perimeters, call accessPolicies.servicePerimeters.commit.

Updating a dry run configuration

When you update a dry run configuration, you can modify the list of services, projects, and VPC accessible services, among other features of the perimeter.

After you update a service perimeter, it may take up to 30 minutes for the changes to propagate and take effect. During this time, the perimeter might block requests with the following error message: Error 403: Request is prohibited by organization's policy.

Console

1. In the Google Cloud console navigation menu, click Security, and then click VPC Service Controls.

   Go to the VPC Service Controls page

2. At the top of the VPC Service Controls page, click Dry Run Mode.

3. In the list of service perimeters, click the name of the service perimeter that you want to edit.

4. On the VPC Service Perimeter Detail page, in the Dry run config section, click Edit.

5. On the Edit VPC Service Perimeter page, make changes to the dry run configuration for the service perimeter.

6. Click Save.

gcloud

To add new projects to a perimeter, use the dry-run update command and specify the resources to add:

gcloud access-context-manager perimeters dry-run update PERIMETER_NAME \
  --add-resources=RESOURCES \
  [--policy=POLICY_NAME]

Where:

• PERIMETER_NAME is the name of the service perimeter that you want to obtain details about.

• RESOURCES is a comma-separated list of one or more project numbers or VPC network names. For example: projects/12345 or //compute.googleapis.com/projects/my-project/global/networks/vpc1. Only projects and VPC networks are allowed. Project format: projects/<project_number>. VPC format: //compute.googleapis.com/projects/<project-id>/global/networks/<network_name>.

• POLICY_NAME is the name of your organization's access policy. This value is required only if you haven't set a default access policy.

To update the list of restricted services, use the dry-run update command and specify the services to add as a comma-delimited list:

gcloud access-context-manager perimeters dry-run update PERIMETER_ID \
  --add-restricted-services=SERVICES \
  [--policy=POLICY_NAME]

Where:

• PERIMETER_NAME is the name of the service perimeter that you want to obtain details about.

• SERVICES is a comma-delimited list of one or more services. For example: storage.googleapis.com or storage.googleapis.com,bigquery.googleapis.com.

• POLICY_NAME is the name of your organization's access policy. This value is required only if you haven't set a default access policy.

Identifying blocked requests

After you have created a dry run configuration, you can review logs to identify where the dry run configuration would deny access to services if enforced.

Console

1. In the Google Cloud console navigation menu, click Logging, and then click Logs Explorer.

   Go to Logs Explorer

2. In the Query field, input a query filter like the following filter, and then click Run query.

   log_id("cloudaudit.googleapis.com/policy") AND severity="error" AND protoPayload.metadata.dryRun="true"
   

3. View the logs under Query results.

gcloud

To view logs using gcloud CLI, run a command like the following:

gcloud logging read 'log_id("cloudaudit.googleapis.com/policy") AND severity="error" AND protoPayload.metadata.dryRun="true"'