Stelvio: Serverless AWS for Python Devs

Hi! Honest question, why did decide on using pulomi instead of just using the boto3 Python library to interact with aws? Feels like it adds a lot of overhead where something like boto3 could just be abstracted away?

Why not Zappa?

https://github.com/zappa/Zappa

Nice writing and summary there. As an author of stelvio I felt the same. It's not that there're no tools. But none of them is covering enough AWS surface while being truly focused on Python devs. Some are general infra tools (CDK, Pulumi) focused on infra people, where python is not primary language, some are Python tools like Chalice (likely abandonded) and some are meant for Python devs but use json (Zappa).

I wrote my own thinking here https://blog.stelvio.dev/why-i-am-building-stelvio/

I 'm working hard on Stelvio hoping it can become the best tool to do infra in Python.

Btw. If you'd be willing to share more details about what you want/miss in python cloud tooling could you drop me an email at michal at stelvio.dev ? I'm happy to talk. Applies to other interested people too!

> Neat tool!

thanks! (author here not OP)

lambda/api/dynamo is just a start. I have very clear vision where i want to take this and it's not limited to lambda/api/dynamo. but these are easier to start with before you get to VPC, NAT, security groups etc. etc.

Both of these tools hit the sweet spot starting out—good performance for cheap (not entirely true if you consider the free tier of sql services, but I've had bad experiences with those). It's the lock-in and traffic that kills you.

I guess this question is not aimed at me as I'm not OP but I'll try to answer as the author of stelvio. I use CDK at my day job every day.

I like CDK, it was huge step forward compared to Cloud Formation, Terraform etc.

But I think infra tools can be still made better for developers. In stelvio you can do this:

  table = DynamoTable(
      name="todos",
      fields={
          "username": AttributeType.STRING,
          "created": AttributeType.STRING,
      },
      partition_key="username",
      sort_key='created'
  )

  api = Api("todo-api")
  api.route("POST", "/todos", handler="functions/todos.post", links=[table])
  api.route("GET", "/todos/{username}", handler="functions/todos.get")

- DynamoDB table

- Lambda function with IAM (policy - with permissions for dynamo table, role)

- API Gateway (resources, methods, integrations, role, stage & deployment)

- CloudWatch log groups

It would be much more code in CDK.

Stelvio aims to make common things much simpler while allowing you to change details if you need to.

Hey, I was looking for similar tool before starting building stelvio and I found Chalice. It looked good, it's a nice tool but:

- as you mentioned, seems to be abandoned

- chalice mixes infra code with app code within the file (decorators), stelvio keeps them separate

- in chalice you configure lambdas using json. I strongly believe that everything should be done in python

- chalice is limited to lambda/api/queues, stelvio aims to go further/broader

hope this explains, happy to answer any other questions

There is also Mangum [0], which can wrap up any ASGI app and deploy it as a lambda.

[0] https://mangum.fastapiexpert.com/

Eugh. What rug pull do you mean?