$ docker -v Docker version 1.12.5, build 7392c3b $ docker-compose -v docker-compose version 1.9.0, build 2585387 docker for mac install 以前はmacでDockerを使うのにVagrantにdockerを入れて操作していましたが、mac純正の仮想環境xhyveを利用するようになったためVagrantはお役御免となり、だいぶ使いやすくなったようです。 https://docs.docker.com/docker-for-mac/ Dockerfileとdocker-compose.ymlを追加 RailsのプロジェクトルートにDockerfileとdocker-compose.ymlを追加します。 Dockerfile railsの公式Docker image
![既存のrailsプロジェクトをDockerで開発する手順 - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/207fa4cd03ef875a28e4f16a890bfcbdbf56cb7a/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9JUU2JTk3JUEyJUU1JUFEJTk4JUUzJTgxJUFFcmFpbHMlRTMlODMlOTclRTMlODMlQUQlRTMlODIlQjglRTMlODIlQTclRTMlODIlQUYlRTMlODMlODglRTMlODIlOTJEb2NrZXIlRTMlODElQTclRTklOTYlOEIlRTclOTklQkElRTMlODElOTklRTMlODIlOEIlRTYlODklOEIlRTklQTAlODYmdHh0LWFsaWduPWxlZnQlMkN0b3AmdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT01NiZzPWJlY2EyMWQ0MzQ4MzEzNmE4MzUyMTFkNjY2Mjg2NjA0%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBra3lvdWhlaSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9ZTI4NzFiNTQ0OTQyM2M3OGY4OGQyZTIyYzUyODI0ZGE%26blend-x%3D142%26blend-y%3D436%26blend-mode%3Dnormal%26txt64%3DaW4g5qCq5byP5Lya56S-44OZ44O844K344OD44Kv%26txt-width%3D770%26txt-clip%3Dend%252Cellipsis%26txt-color%3D%2523212121%26txt-font%3DHiragino%2520Sans%2520W6%26txt-size%3D36%26txt-x%3D156%26txt-y%3D536%26s%3Dde8113f473737565ee88ed662d9b8a7d)