Ensure that only images from trusted Google Cloud Platform (GCP) projects are allowed as the source for boot disks for new virtual machine instances. To enforce this constraint, enable and configure the “Define Trusted Image Projects” policy at the GCP organization level.
The policy is now enforced and any user who tries to use an image that is not allowed will receive an error message.
By following the above steps, you can remediate the misconfiguration of restricting the use of images in GCP using GCP CLI.
Using Python
To remediate the misconfiguration of restricting the use of images in GCP using Python, you can follow the below steps:
Firstly, you need to create a service account in the GCP project with the required permissions to manage the images. You can use the following command to create a service account:
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gcloud iam service-accounts create [SA-NAME] --description "[SA-DESCRIPTION]" --display-name "[SA-DISPLAY-NAME]"
After creating the service account, you need to grant it the required permissions to manage the images. You can use the following command to grant the required permissions:
Next, you need to create a custom IAM role that restricts the use of images. You can use the following Python code to create a custom IAM role:
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from google.cloud import iamclient = iam.IAMClient()# Define the permissions for the custom rolepermissions = [ "compute.images.get", "compute.images.list", "compute.images.useReadOnly"]# Create the custom roleresponse = client.create_role( parent="projects/[PROJECT-ID]", role_id="[ROLE-ID]", role={ "title": "[ROLE-TITLE]", "description": "[ROLE-DESCRIPTION]", "included_permissions": permissions })
After creating the custom IAM role, you need to assign it to the service account that you created in step 1. You can use the following Python code to assign the custom IAM role to the service account:
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from google.cloud import iamclient = iam.IAMClient()# Assign the custom role to the service accountresponse = client.set_iam_policy( resource="[RESOURCE-ID]", policy={ "bindings": [ { "role": "projects/[PROJECT-ID]/roles/[ROLE-ID]", "members": [ "serviceAccount:[SA-EMAIL]" ] } ] })
Finally, you need to verify that the custom IAM role has been assigned to the service account and that the service account has the required permissions to manage the images. You can use the following command to verify the same: