13.13. How to Configure AWS Lambda: Versioning and Aliasing Lambda Functions

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AWS Lambda is a computing platform that allows you to run code without the need to provision or manage servers. It runs code only when needed and automatically scales from a few requests per day to thousands per second. In this text, we will specifically cover versioning and aliasing in Lambda functions.

Lambda releases are an effective way to manage your Lambda functions. When you publish a version of a function, AWS Lambda keeps a copy of that version so you can reference it or even map it to a specific alias. This is useful for managing and tracking deployments of Lambda functions across different development environments such as production, development, and testing.

Configuring Versioning in Lambda Functions

To configure versioning on Lambda functions, you need to follow the following steps:

1. First, go to the AWS Lambda console and select the function you want to version.
2. Then, in the function configuration panel, click on the "Actions" option and select "Publish new version".
3. In the pop-up window, you can provide an optional description for the version you are publishing. Click "Publish" to create the version.

Now, a new version of your Lambda function will be created and available for use. You can see the list of published versions in the "Versions" section of the role configuration panel.

Configuring Alias ​​in Lambda Functions

Lambda aliases are pointers to specific versions of a Lambda function. They are useful for managing Lambda function deployments across different development environments. For example, you might have an alias called "PROD" that points to the latest version of a function and an alias called "DEV" that points to an older version.

To configure aliases in Lambda functions, follow the steps below:

1. On the Lambda function configuration page, click on the "Actions" option and select "Create alias".
2. In the pop-up window, provide a name for the alias and select the version of the function that the alias should point to. You can also provide an optional description.
3. Click "Create" to create the alias.

After you create an alias, you can use it to invoke a specific version of a Lambda function. For example, if you have an alias called "PROD" that points to the latest version of a function, you can use the alias name instead of the function name when invoking the function.

Conclusion

Versioning and aliasing on Lambda functions provides an effective way to manage and track deployments of Lambda functions across different development environments. They allow you to maintain multiple versions of a function and use aliases to point to specific versions, making it easier to manage deployments and roll back to previous versions if necessary.

We hope this guide was helpful in understanding how to configure versioning and aliasing in Lambda functions. Remember, AWS Lambda is a powerful and flexible tool, and understanding its capabilities can help streamline your development and operations workflow.

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