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by tyingq 1216 days ago
It's also interesting how things like AWS Lambdas, Graviton, etc, are exposing all the shortcomings of the various pip install, venv, poetry, etc, approaches.

It's not impossible to figure it out, but you end up spending a lot of time to come up with something that works locally, within containers, inside a CI/CD system, and then deployed out across things like Lambdas, or non x64 machines.

Then, after it's all working, upgrading the Python version, or an extension that has C code, etc, repeats some of the hard bits.
2 comments
scarface74 1216 days ago
At least with Lambda it really is easy, just use Serverless Application Model and when you do “sam build” choose “--use-container”. It will look at your CloudFormation template where you are referring to the local directory containing your source code and requirements.txt and download and build in the appropriate Docker container for your language, version and architecture.

It works great when you have native dependencies.

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tyingq 1216 days ago
I assume that means container based Lambdas, which would have slower cold start times and maybe some other disadvantages, but yes, it would be simpler.
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scarface74 1216 days ago
No. You just build zip file based Lambdas locally using containers.

In your CFT you specify the local directory and the architecture.

SAM will download the Amazon Linux container for your language runtime locally using the correct architecture (x86 or ARM) and download the correct dependencies based on your architecture and package everything in a local folder. It will then output a modified template pointing to the local folder where your Lambda was built. It will contain your source code and dependencies that are compatible with Amazon Linux.

“sam package” will then zip the files up built by Sam build and upload them to S3. It will then create another template that references the zip file in S3.

“Sam deploy” will deploy the standard zip file based Lambda.

This lets you build zip file based Lambdas locally including Amazon Linux native dependencies on either Windows, Macs or other versions of Linux.

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tyingq 1216 days ago
Ah, that is nice, and an improved experience.
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rgavuliak 1216 days ago
Lambdas now work with Docker
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