aws rds describe-db-instances | jq  -cr '.DBInstances[].DBInstanceIdentifier' | while read i; do
dbStatus=$(aws rds describe-db-instances --db-instance-identifier $i --query DBInstances[].DBInstanceStatus --output text)
if [ $dbStatus != "available" ]; then
aws cloudwatch put-metric-data --metric-name RdsInstanceUnavailable --namespace Custom/RDS --value 1 --dimensions DBInstanceIdentifier=$i
else
aws cloudwatch put-metric-data --metric-name RdsInstanceAvailable --namespace Custom/RDS --value 1 --dimensions DBInstanceIdentifier=$i
fi
done