[PYTHON] It is convenient to use Layers when putting a library on Lambda

When deploying to Lambda, I think that the library may be deployed together, but when deploying, I could not make a small modification on the console, which was a bit annoying. If I was confused about it, I was advised to use Layers, so a memorandum.

Function to deploy

A function that taps the API. The language is Python.

Lambda Layers feature

official. https://docs.aws.amazon.com/ja_jp/lambda/latest/dg/configuration-layers.html The library can be imported as a layer and used as a common library. Therefore, there is no need to include the library in the Lambda function. It seems that Layers published by other users can also be used.

If you deploy as it is

The library alone was 4.5MB. image.png

I don't see the inline code and I have to upload it again for a bit of editing. image.png

Use Layers

Select Layers from the menu bar on the left and select "Create Layer" image.png

Upload the name and description, and the zip of the library you want to use, and create it.

At this time, ** Put all the libraries to be used in a folder called "python" and zip the entire python folder. ** ** When uploaded, the library module will be placed directly under / opt. In python, the path is already set in / opt / python, so if you include the library in the python folder and upload it, the path to the library can be used automatically. Refer to the official document for specified folders other than Python. I stumbled on this ...

Set to Lambda

If you select "Layers" from Lambda Designer, an item to add a layer will appear, so select "Add Layer". image.png

Select "Name", select the layer you created earlier, and add it. image.png

Added to the layer. image.png

Deployment only requires modules and config files, allowing inline code editing! image.png


Not only is the library shared, but it is also convenient for normal deployment. But the trick is, I have to read the official document properly ...

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