Config: Svb

# svb_config/__init__.py import os ENVIRONMENT = os.environ.get("SVB_ENV", "development")

# svb_config/validators.py from pydantic import BaseSettings, Field class SVBConfig(BaseSettings): api_url: str = "https://api.svb.com" client_id: str = Field(..., env="SVB_CLIENT_ID") # ... means required client_secret: str = Field(..., env="SVB_CLIENT_SECRET") timeout_seconds: int = 30 svb config

export SVB_ENV=production export DJANGO_SETTINGS_MODULE=svb_config python manage.py runserver 1. Secret Rotation Without Downtime A sophisticated SVB config integrates with HashiCorp Vault or AWS Secrets Manager. Instead of environment variables, you call a secret store at boot: # svb_config/__init__

# svb_config/development.py from .base import * DEBUG = True SECRET_KEY = "dev-key-not-for-prod" ALLOWED_HOSTS = ["localhost", "127.0.0.1"] SVB_API_URL = "http://localhost:8001/mock-svb" Step 4: Dynamic Loading (The Config Dispatcher) The magic of SVB config lies in the __init__.py . It dynamically selects the correct module based on an environment variable. Instead of environment variables, you call a secret

# svb_config/production.py from .base import * SECRET_KEY = os.environ["DJANGO_SECRET_KEY"] DEBUG = False ALLOWED_HOSTS = os.environ.get("ALLOWED_HOSTS", "").split(",") For SVB config in high-security mode, we require all bank creds if not SVB_CLIENT_ID or not SVB_CLIENT_SECRET: raise ValueError("SVB_CLIENT_ID and SVB_CLIENT_SECRET must be set in production")

# Example of circuit-breaker ready config SVB_PRIMARY_REGION = os.environ.get("SVB_PRIMARY_REGION", "us-east-1") SVB_FAILOVER_REGIONS = os.environ.get("SVB_FAILOVER_REGIONS", "us-west-2,eu-west-1").split(",") Pitfall 1: Storing Config in the Code Repository Fix: Use .env files ( .gitignore -ed) or a secrets manager. For Docker/K8s, use Secrets objects. Pitfall 2: Not Validating Early Fix: Add a health check endpoint that verifies critical SVB config keys are populated.