This code downloads a multi-channel GOES-16 netcdf file when it recieves a SNS notification that the file has been created on S3 and creates an RGB png from the file. It then uploads the resulting png image back to a bucket.
This code has been adapted from https://github.com/perrygeo/lambda-rasterio. Thanks to them for figuring out the basic template of how to easily make, test, and package a python lambda function.
You can test the main parts of the python code by using:
make test
Which utilizes DockerfileTest to load requirements.txt so they don't have to be reinstalled every time you want to test the app. This testing could be improved in the future to pass an actual example json to the lambda handler.
First set up a lambda function on AWS using python 2.7. Give it a name such as goes16. Set SNS on the left side of the Lambda with arn:aws:sns:us-east-1:123901341784:NewGOES16Object as the appropriate arn for the GOES-16 feed. Make sure to set the Handler in the lambda function to handler.lambda_handler so that this will work.
Build the necessary zip file using:
make
Upload the zip file to the lambda function:
aws lambda update-function-code --function-name goes16 --zip-file fileb://dist.zip --profile edc