S3 Object lambda

Posted on by wpadmin

Amazon S3 Object Lambda is a feature of Amazon Simple Storage Service (S3) that allows you to add your own processing to the data as it is retrieved from an S3 bucket. With S3 Object Lambda, you can customize and modify the content of objects when they are accessed without having to change the objects themselves.

Here’s how it works:

  1. Processing Lambda Function: You write an AWS Lambda function that will process the object data when it’s retrieved. This could involve things like transforming data, applying filters, or adjusting metadata.
  2. S3 Object Lambda Access Point: You create an S3 Object Lambda Access Point, which acts as an entry point for your Lambda function to process the data in real-time when the object is retrieved.
  3. Data Access with S3 Object Lambda: When you request an object through the S3 Object Lambda Access Point, the data gets routed to your Lambda function, which can modify it, and then return it to you in the modified form.

Use Cases:

  • Data Transformation: If you store data (such as images, documents, or JSON files) in a certain format but want to retrieve it in a different format (e.g., convert a document from PDF to text on demand).
  • Security and Compliance: Redact sensitive information from data on the fly before it’s retrieved by the user.
  • Dynamic Content: Use Object Lambda to add dynamic content to objects at runtime, such as embedding watermarks in images or adding metadata to files.

How to Set It Up:

  1. Create an AWS Lambda function to process your data. This function will take the object data as input, perform the transformation, and return the modified object data.
  2. Create an S3 Object Lambda Access Point:
    • When creating the access point, you’ll specify which Lambda function should be invoked to process the objects.
  3. Access Data via the Access Point: Use the S3 Object Lambda Access Point’s URI to retrieve objects with the applied Lambda function logic.

Example:

Let’s say you have JSON files stored in S3, and you want to redact certain fields from these files before sharing them. You could:

  • Write a Lambda function that removes sensitive data from the JSON.
  • Create an S3 Object Lambda Access Point that processes all requests to this specific S3 bucket.
  • When someone requests the JSON data, the Lambda function would redact the sensitive fields and return the modified data.

Pricing:

You pay for both the S3 Object Lambda Access Point requests and the Lambda invocation. Charges include the Lambda execution time and the data transfer between S3 and Lambda.

For more detailed information, you can check the AWS S3 Object Lambda documentation.

Let me know if you need more specific details on how to implement or configure it!

Yes, to use S3 Object Lambda, you need to create an S3 Access Point that supports Lambda processing. Here’s why and how this works:

Why an S3 Access Point is Required:

An S3 Access Point is a named network endpoint that you can use to manage access to your S3 data. S3 Object Lambda relies on this access point to route object retrieval requests through an associated AWS Lambda function that processes the objects before they are returned.

When you use S3 Object Lambda, the access point acts as the “front door” for your S3 bucket, and the Lambda function processes objects whenever they are accessed via that access point.

Steps to Set Up S3 Object Lambda with an S3 Access Point:

  1. Create an S3 Access Point:
    • This is necessary to control how objects are accessed within the S3 bucket.
    • The access point simplifies permission management, especially when working with larger datasets or specific use cases where access needs to be restricted to certain users or services.
  2. Create an S3 Object Lambda Access Point:
    • You create an S3 Object Lambda Access Point, which uses the S3 Access Point you just created.
    • You then associate a Lambda function with this access point, and this function will be triggered whenever data is requested via the access point.
  3. Configure the Lambda Function:
    • You create the Lambda function that will process data when accessed. For example, transforming the data, applying filters, or adding metadata before sending it back to the requester.
  4. Access Data via the Object Lambda Access Point:
    • Instead of accessing your S3 bucket directly, you’ll use the S3 Object Lambda Access Point endpoint to retrieve objects. When you access an object through this endpoint, it first passes through the Lambda function before being returned to you.

So, to clarify:

  • Yes, you do need an S3 Access Point to enable S3 Object Lambda.
  • S3 Object Lambda Access Point is an extension of the normal S3 Access Point that adds Lambda processing during the data retrieval process.

Example:

  1. Create an S3 Access Point for a specific bucket.
  2. Create an S3 Object Lambda Access Point that is linked to that Access Point.
  3. Write a Lambda function to process the objects as they are retrieved (e.g., redacting sensitive data or transforming formats).
  4. Use the S3 Object Lambda Access Point’s endpoint to retrieve objects, which will now pass through the Lambda function for processing.

Pricing:

You’ll be charged for:

  • S3 Access Point requests.
  • Lambda invocations (for processing).
  • Data transfer between S3 and Lambda.

I hope this clears things up! Let me know if you’d like more details on how to set this up.