August 2016
Intermediate to advanced
384 pages
9h 20m
Japanese
Content preview from Docker
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
150
9 章 コンテナのデプロイ
明示的に毎回 -f prod.yml を指定するかわりに、環境変数の
COMPOSE
を設定しておくこともできま
す。例をご覧ください。
$ COMPOSE_FILE=prod.yml
$ docker-compose up -d
...
これで、デフォルトの
docker-compose.yml
ではなく、
prod.yml
が使われるようになります。
設定ファイルの生成方法の強化
テンプレートを使って Docker コンテナ用の設定ファイルを生成するのは、アプリケーションを Docker
化する際にとても広く使われている手法です。これは特に、そのアプリケーションが環境変数を直接サ
ポートしていない場合に当てはまります。本書のサンプルのようなシンプルな例よりも先に進む場合は、
Jinja2 や Go テンプレートといった適切なテンプレートプロセッサを使い、正規表現の失敗でおかしなエ
ラーが生じることを避けると良いかも知れません。
この問題は一般的なことなので、Jason Wilder はこのプロセスを自動化するために dockernize
（https://github.com/jwilder/dockerize）を作成し ま し た。dockernize は、設 定 フ ァ イ ル をテンプ
レートファイルや環境変数から生成し、その後に通常のアプリケーションを呼び出します。この場合、
dockernize は
CMD
あるいは
ENTRYPOINT
命令から呼び出されるアプリケーションの起動スクリプトをラッ ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.