AWS DataPipeline の ShellCommandActivity を使って特定のタグを持つインスタンスを日次停止する ref: http://qiita.com/satoshi_iwashita/items/992f9a5166703322e478

file0.txt

#!/bin/bash

sudo yum update aws-cli -y

AWS="/usr/bin/aws --region ap-northeast-1"

ids=$(${AWS} ec2 describe-instances --filters \\
    "Name=tag:dont_stop,Values=False" \\
    "Name=instance-state-code,Values=16" \\
    --query 'Reservations[].Instances[].InstanceId' \\
    --output text)

if [ -z "${ids}" ]; then
    echo "nothing running instance."
else
    echo "stop instances ids -> ${ids}"
    ${AWS} ec2 stop-instances --instance-id ${ids} \\
    && echo "complete ec2-auto-stop."
fi

exit 0