Lambda layers demo

Description

This project created to demonstrate the usage of layers and common modules

Tools we use

• SAM
• Python 3.7
• Pytest
• GS layers project

Run locally with local layer

• pip install -r /home/mam/projects/gs/lambda-layers/layers/python3.7DepPack1/requirements.txt

Debug

• Add debug configuration in .vscode/launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
           "name": "Debug demo function",
           "type": "python",
           "request": "attach",
           "port": 5890,
           "host": "localhost",
           "pathMappings": [
               {
                   "localRoot": "${workspaceFolder}/src",
                   "remoteRoot": "/var/task"
               }
           ]
       }
   ]
 }

• install ptvsd pip install ptvsd --system -t ./src
• add these line on top of function file

import ptvsd
ptvsd.enable_attach(address=('0.0.0.0', 5890), redirect_output=True)
ptvsd.wait_for_attach()

• run ./invoke.sh
• start debug (F5)

Useful commands

Commands or sh	Description
export PYTHONPATH=./src:/home/mam/projects/gs/lambda-layers:$PYTHONPATH	Let python interpreter know the src module
python -m pytest	Run unite test
./invoke.sh	Invoke function locally
./dev-deploy.sh	Deploy the function to de aws account
pip freeze > dev-requirements.txt	Freeze all dev modules to a file