build-lambda-layer-ec2.sh

#!/bin/bash

library=pandas
artifacts_bucket=<MY_ARTIFACTS_BUCKET>

echo "Making sure we have the latest packages"
yum update -y

echo "Installing python3 and pip"
yum install python3 -y # this is currently python3.7
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3 get-pip.py

echo "Creating target directory"
mkdir -p build/python/lib/python3.7/site-packages
cd build

echo "Installing $library"
/usr/local/bin/pip install $library -t python/lib/python3.7/site-packages/

echo "Compressing current directory into $library.zip"
zip -q -r $library.zip .

echo "Uploading to bucket $artifacts_bucket"
aws s3 cp $library.zip s3://$artifacts_bucket/layers/

echo "Publishing lambda layer"
yum install -y jq # the instance was lacking region information
REGION=`curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | jq .region -r`

aws lambda publish-layer-version \
    --layer-name $library \
    --content "S3Bucket=$artifacts_bucket,S3Key=layers/$library.zip" \
    --compatible-runtimes python3.7 \
    --region $REGION

echo "Shuting down instance from inside"
shutdown now