Connect GCP

Connect GCP

You are helping a semi-technical founder connect Shasta to their Google Cloud project for SOC 2 and ISO 27001 compliance scanning.

Configuration

Shasta uses shasta.config.json in the project root for all settings. Before running any commands, check if this file has gcp_project_id set. If not, you'll need to configure it.

What to do

1. Check that the GCP SDK extra is installed. The GCP check modules need the [gcp] optional dependencies (google-auth, google-api-python-client, google-cloud-storage). Test with:

   <PYTHON_CMD> -c "import google.auth, googleapiclient, google.cloud.storage; print('gcp deps OK')"
   

   If that fails with ModuleNotFoundError, install them: pip install -e ".[gcp]"

2. Check if shasta.config.json is configured for GCP. Read the file. If gcp_project_id is empty, ask the user:

   • Have you run gcloud auth application-default login? If not, tell them to run ! gcloud auth application-default login first. This sets up Application Default Credentials (ADC) — the same mechanism a service account or Workload Identity would use.
   • Run gcloud config get-value project to get their current project ID. If they have several, gcloud projects list shows all of them.
   • What region are their resources in? (e.g., us-central1, us-east1, europe-west1) — default: us-central1
   • If company_name is still empty, ask for it too.

   Update shasta.config.json with their answers — set gcp_project_id and gcp_region.

3. Also detect the correct Python command if python_cmd isn't set. Run python3 --version and python --version to find which works. Update python_cmd in the config.

4. Validate GCP credentials by running (substitute the correct python command):

   <PYTHON_CMD> -c "
   from shasta.config import get_gcp_client
   c = get_gcp_client()
   info = c.validate_credentials()
   services = c.discover_services()
   print(f'GCP Project: {info.project_name} ({info.project_id})')
   print(f'Project Number: {info.project_number}')
   print(f'Principal: {info.principal}')
   print(f'Region: {info.region}')
   print(f'Services detected: {services if services else \"none (empty project)\"}')
   "
   

5. Initialize the Shasta database (if not already done):

   <PYTHON_CMD> -c "from shasta.db.schema import ShastaDB; db = ShastaDB(); db.initialize(); print('Database initialized at data/shasta.db')"
   

6. Present results in a clear, friendly format and suggest running /scan next.

Important notes

• Never ask the user to paste GCP credentials or service account keys into the chat. Always use gcloud auth application-default login or the GOOGLE_APPLICATION_CREDENTIALS environment variable pointing at a key file.
• Replace <PYTHON_CMD> with whatever works on this machine (python3, python, or py -3.12).
• If credentials fail, guide them through gcloud auth application-default login or check that the active project is set with gcloud config set project <PROJECT_ID>.
• GCP scanning requires read access. The roles/viewer (Project Viewer) basic role is sufficient for all checks; roles/iam.securityReviewer covers the IAM-policy checks if Viewer is too broad for the org.
• Some checks (org-policy, audit-log config) require APIs to be enabled — cloudresourcemanager.googleapis.com, serviceusage.googleapis.com, compute.googleapis.com. Missing APIs produce NOT_ASSESSED findings, which is fine.