Daily Email Alerts for New S3 Objects: Automate CSV Reporting with AWS

Discover how to automatically send daily CSV reports of new objects in your S3 bucket using AWS Lambda and event notifications. Streamline your workflow today!
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Daily Email Alerts for New S3 Objects: Automate CSV Reporting with AWS

If you're managing files in Amazon S3, you may find yourself in need of regular updates about new objects added to your bucket. Particularly, if you require a report in CSV format that lists these new files daily, you've come to the right place. In this guide, we'll explore how to automate this process using AWS Lambda and S3 Event Notifications, ensuring you never miss a file again.

The Challenge: Daily Reporting on New S3 Objects

As requested, you want to receive an email every day that lists the files that have landed in your S3 bucket by the end of the day. While you might have explored options like S3 inventory reports, you discovered that they generate files in another S3 bucket, which isn't ideal for your requirements.

So, what’s the solution?

The Solution: Automating Reports with AWS Lambda and S3 Notifications

To achieve daily email alerts regarding new files in your S3 bucket, you can utilize S3 event notifications combined with AWS Lambda. This solution will allow you to automatically generate a CSV report based on newly uploaded objects in your bucket. Here's how to set it up:

Step-by-Step Setup

Enable S3 Event Notifications

Go to the AWS Management Console and open the S3 service.

Choose the bucket for which you want to receive notifications.

Select the Properties tab.

Under Event notifications, click Create event notification.

Configure the notification so that it triggers when a new object is created (the event type should be "PUT").

Specify that the event will invoke a Lambda function.

Create the AWS Lambda Function

Navigate to the AWS Lambda service in the console.

Click on Create function.

Choose a Author from scratch option, give your function a name (e.g., S3ReportGenerator), and set the runtime (Python, Node.js, etc. depending on your preference).

In the function code, program it to extract the file names from the notification event and format them into a CSV report.

Send Email Using Amazon SES

Within your Lambda function, you can configure Amazon Simple Email Service (SES) to send the generated CSV report.

Ensure you’ve verified your email identity within SES which will be used to send the emails.

Include code in the Lambda function to send an email with the CSV attached.

Schedule Daily Reports

If you need daily summaries, you can use another Lambda function triggered by a CloudWatch Events rule that runs daily to compile a list of new files, utilizing the data collected in the previous notifications.

Example Lambda Function Code Snippet

Here's a very basic example of what your Lambda function might include (in Python):

[[See Video to Reveal this Text or Code Snippet]]

Conclusion: Automate Your Workflow

By leveraging S3 event notifications in conjunction with AWS Lambda, you can fully automate the process of sending daily reports of new objects in your S3 bucket. This not only saves you time but also keeps you informed and organized.

Feel free to ask questions or share your experiences in implementing this solution. Happy managing your S3 buckets!

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