在 Aws lambda 和 EC2 实例之间共享文件

Question

I want a solution to share files between AWS Lambda and EC2 (Windows) .

How can lambda place the file inside the ec2 file system after it notifies by the s3event? In the same way, if way lambda wants to access the ec2 file system that also should be possible.

For example: if any file created in s3 will trigger notify lambda, then that would be copied to EC2 drive in some path, then application inside server will process it and so on.

Please let me know any possible way to achieve this. Thanks in advance.

Answer 1

You can have your S3 send a notification event when an object is created.

In your lambda function set up a S3 trigger that consumes s3 notification events - checkout this tutorial: Using an Amazon S3 trigger to invoke a Lambda function

Then you probably would want your lambda to call an endpoint on your EC2 service to trigger the copy function, or source the event in a message broker like SQS if you care about real-time processing.

Answer 2

Use EFS . This is a network file system which can be simultaneously mounted on EC2 instance as well as within Lambda functions.

As the process is quite lengthy, and the question didn't mention which OS is being used (EFS is not supported on Windows), or what Lambda runtime is desirable. Its impractical to document a full example, however there are some useful guides to get started.

There is a blog on using EFS within Lambda functions. The Lambda function would need access to read the object from the S3 bucket and store it on the EFS volume.

An example of mounting EFS on an EC2 instance running Amazon Linux also exists.