Shell script to update lambda code and environment variables to multiple regions and environments using AWS CLI

update-lambda.sh

#!/bin/bash
#----------------------------------------------------
#  Author : athakur
#  Version : 1.0
#  Date : 10/02/2018
#  Description : Deployment script to update lambda code and env variables
#  Sample usage :  
#	Local : ./update-lambda.sh test aws-admin fileb://../lambda.zip
#	Dev : ./update-lambda.sh dev aws-admin fileb://../lambda.zip
#	QA : ./update-lambda.sh qa aws-admin fileb://../lambda.zip
#	Prod : ./update-lambda.sh prod aws-admin fileb://../lambda.zip
#  More details :  http://opensourceforgeeks.blogspot.in/2018/02/shell-script-to-update-lambda-code-and.html
#----------------------------------------------------
echo "Updating lambda code for ENV : $1 PROFILE : $2 ZIP_FILE_PATH : $3"

ENV=$1
PROFILE=$2
ZIP_FILE_PATH=$3

if [ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ]
  then
  echo "Incorrect arguments supplied. Format - ./update-lambda.sh ENV PROFILE ZIP_FILE_PATH"
  exit
fi

FUNCTION_NAME="my-lambda-$ENV"

ENV_VAR_1=1991
ENV_VAR_2="test"


SNS_ENDPOINT=''

SUPPORTED_REGIONS=("us-east-1" "ap-northeast-1" "ap-southeast-1" "ap-southeast-2")

for REGION in ${SUPPORTED_REGIONS[@]}
do
    echo 'Region : $REGION'
    case "$REGION" in
		"us-east-1")
			SNS_ENDPOINT="arn:aws:sns:us-east-1:123456789123:my-sns-notification"
		;;
		"ap-northeast-1")
			SNS_ENDPOINT="arn:aws:sns:ap-northeast-1:123456789123:my-sns-notification"
		;;
		"ap-southeast-1")
			SNS_ENDPOINT="arn:aws:sns:ap-southeast-1:123456789123:my-sns-notification"
		;;
		"ap-southeast-2")
			SNS_ENDPOINT="arn:aws:sns:ap-southeast-2:123456789123:my-sns-notification"
		;;					
		*)
			echo "Environment not provided"
			exit 1
		;;
	esac

	env_variables="{\"Variables\":{\"ENV_VAR_1\":\"${ENV_VAR_1}\",\"ENV_VAR_2\":\"${ENV_VAR_2}\",\"SNS_ENDPOINT\":\"${SNS_ENDPOINT}\",\"ENV\":\"${ENV}\"}}"
	echo "Env variables :  $env_variables"		
    lambda_update_env_command="aws lambda update-function-configuration --function-name $FUNCTION_NAME --region $REGION --profile $PROFILE --environment '$env_variables' --timeout 300 --memory-size 3008"	
	echo "Executing command : $lambda_update_env_command"
	eval $lambda_update_env_command
    lambda_update_code_command="aws lambda update-function-code --function-name $FUNCTION_NAME --region $REGION --zip-file $ZIP_FILE_PATH --profile $PROFILE"	
	echo "Executing command : $lambda_update_code_command"
	eval $lambda_update_code_command	
	echo "Completed Lambda function update for region $REGION"
done