Aws lambda download file from s3 move to ec2

Lambda takes care of it all. We can use it as a data source or even as a destination for various applications. AWS Lambda being serverless allows us to run anything without thinking about any underlying infrastructure.

So you can use Lambda for a lot of your processing jobs or even simple communicating with any of your AWS resources. Refer to the Tree for more clarity. We need to move these task files to a new bucket while preserving the file hierarchy. For solving this problem, we will use Amazon S3 events. Every file pushed to the source bucket will be an event, this needs to trigger a Lambda function which can then process this file and move it to the destination bucket.

Either you can use an existing role that already has access to the S3 buckets, or you can choose to Create an execution role. If you choose the later, you will need to attach S3 permission to your role.

Go to Basic settings in your Lambda Function. You will find this when you scroll down your Lambda Function. Click Edit. You can edit your Lambda runtime settings here, like Timeout — Max of 15 mins. This is the time for which your Lambda can run.

Advisable to set this as per your job requirement. The Overflow Blog. Podcast what if you could invest in your favorite developer?

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Question feed. Stack Overflow works best with JavaScript enabled. Accept all cookies Customize settings. To create the policy, navigate to policies on the IAM Dashboard and select create policy. You can either copy an AWS managed policy, manually enter text, or point and click to create the policy. I decided to create my own using point and click Policy Generator to create a policy that looked like this:. For this example, I only need read access for the objects.

The policy is separated into two parts because the ListBucket action requires permissions on the bucket while the GetObject action requires permission on the objects in the bucket. Next, Create Role to enable an EC2 instance to access the s3 bucket. Follow the wizard and add the policy created above.

To do what I needed to achieve — Add User data to run the s3 command. Note: This step can be skipped if you want to just log onto the server and run the command. Table of Contents. More from Middleware Inventory.

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