How to run `AWS CLI` command within `aws lambda` function?

Question

I would like to run aws cli command (actually aws s3 sync) from within the aws lambda function. How do I do that? Ideally in python, but javascript (or java) would work too.

Using python I tried achieving this by Creating a Deployment Package where i would have awscli as a python package, so that I can use it later. However, the aws command is not available during lambda function execution, and only the awscli package is.

How can I:

either: make sure that I have awscli available to be called during lambda function execution?
or: construct a aws s3 sync call directly from python awscli library?

Why would you want to invoke aws cli from lambda? Can't you get the same using the sdk. — Shibashis
– Shibashis, Commented May 23, 2016 at 5:05
I do not think so (or at least, i did not find a way to do that). I could, of course, use SDK to create my own sync routine, but I really would like to use the one which is already offered by aws cli (which internally uses SDK (botocore)), but extends it quite a bit. — van
– van, Commented May 23, 2016 at 9:29

Lucio Veloso · Accepted Answer · 2017-07-07 00:45:59Z

1

Look the project https://github.com/lucioveloso/cli2cloudformation and you will figure out how to wrapper the cli inside a lambda function.

answered Jul 7, 2017 at 0:45

Lucio Veloso

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2 Comments

Timothy Over a year ago

Put the information in your answer as links can go dead.

four43 Over a year ago

This is actually one of the cleanest solutions I've seen

four43 · Accepted Answer · 2022-05-18 22:16:32Z

1

Piggybacking on @lucio-veloso's answer, that's a pretty clever way of invoking the CLI from Python.

Include the awscli in your bundle but shipping the awscli as a dependency using whatever your build process is.

Then you can run something like:

aws_cli_driver = awscli.clidriver.create_clidriver()
aws_cli_driver.main(["s3", "sync", "--delete", "s3://test-my-bucket", "/tmp/my-path"])
if exit_code > 0:
    raise RuntimeError(f"awscli exited: {exit_code}")

Which seems to work for my aws s3 sync use case for using the AWS CLI in Lambda.

answered May 18, 2022 at 22:16

four43

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Comments

Djai · Accepted Answer · 2020-04-03 17:37:01Z

0

-Install AWS CLI in a local virtual environment

-Package AWS CLI and all its dependencies to a zip file

-Create a Lambda Layer

-Use that layer in your lambda function

Step by step guide is at : https://bezdelev.com/hacking/aws-cli-inside-lambda-layer-aws-s3-sync/

Or

use bash layers as suggested in other stack overflow ans Call aws-cli from AWS Lambda

answered Apr 3, 2020 at 17:37

Djai

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