These are the required packages for Lambda layer for connecting AWS Elasticsearch.

get_layer_packages.sh

#!/bin/bash

export PKG_DIR="python"

rm -rf ${PKG_DIR} && mkdir -p ${PKG_DIR}

docker run --rm -v $(pwd):/foo -w /foo lambci/lambda:build-python3.6 \
    pip install -r requirements.txt -t ${PKG_DIR}

requirements.txt

requests==2.19.1
requests-aws4auth==0.9
elasticsearch==6.3.1