Bash Script to set retention periods for Lambda@Edge CloudWatch Logs in all regions.

set-retention-for-lambda-at-edge-logs.sh

#!/bin/bash

# L@E logs are displayed or stored in the Region closest to the location where the function executed.
# This Bash script sets retention periods for CloudWatch Log in all regions.

FUNCTION_NAME=LambdaAtEdgeFunctionName
LOG_GROUP=/aws/lambda/us-east-1.${FUNCTION_NAME}

# Possible Values: 1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1827, and 3653.
RETENTION_IN_DAYS=30

for region in `aws ec2 describe-regions --query 'Regions[].{Name:RegionName}' --output text`
do
  echo ${region}
  aws logs put-retention-policy --log-group-name $LOG_GROUP --retention-in-days $RETENTION_IN_DAYS --region ${region}
done