AWS Lambda is a serverless, event-driven compute service that lets you use environment variables to adjust your function's behavior without updating code.

Hi Guys, this is Abi from GokceDB and in this video, you are going to learn 8 things about Lambda environment variables in AWS. Let's get into it.

1. An environment variable is a pair of strings that is stored in a function's version-specific configuration.

2. You create an environment variable by defining a key and a value. Your function uses the name of the key to retrieve the value of the environment variable.

3. You define environment variables on the unpublished version of your function. When you publish a version, the environment variables are locked for that version.

4. The Lambda runtime makes environment variables available to your code and sets additional environment variables that contain information about the invocation request such as AWS_REGION and AWS_LAMBDA_FUNCTION_VERSION.

5. Environment variables are not evaluated before the function invocation. Any value you define is considered a literal string and not expanded.

6. For securing your environment variables, you can use server-side encryption to protect your data at rest and client-side encryption to protect your data in transit.

7. To manage environment variables with the AWS CLI or AWS SDK, you can use these three API operations: CreateFunction, GetFunctionConfiguration, and UpdateFunctionConfiguration.

8. To increase database security, it is recommended to you use AWS Secrets Manager instead of environment variables to store database credentials.

In summary, by utilizing AWS Lambda environment variables, you have the ability to modify the behavior of your function without the need for code updates.

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