Environment Variables and Configuration
Discover how to use environment variables to configure your Lambda functions without changing code, promoting reusability and operational flexibility.
What are Env Variables?
When building applications, you often need to change settings without altering your core code. This is where environment variables come in!
They are key-value pairs that your application can access at runtime. Think of them as sticky notes attached to your program, telling it how to behave.
Why Use Env Variables?
Environment variables are crucial for flexible and scalable serverless applications:
- No Code Changes: Update settings like API endpoints or feature flags without modifying and redeploying your function code.
- Environment-Specific Config: Easily switch configurations between development, testing, and production environments.
- Reusability: The same Lambda function code can serve different purposes based on its configured variables.
All lessons in this course
- Understanding Lambda Runtime & Layers
- Environment Variables and Configuration
- IAM Roles for Lambda Security
- Versioning and Aliases for Safe Releases