参考
Ansible雑感 https://gist.github.com/onigra/1fd3b6e744bc23071bf3
about tsudura https://speakerdeck.com/onigra/about-tsudura
AWSのオートスケールとなかよく付き合う https://speakerdeck.com/fujiwara3/awsfalseotosukerutonakayokufu-kihe-u