August 2016
Intermediate to advanced
384 pages
9h 20m
Japanese
Content preview from Docker
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71
5
章
開発での
Docker
の利用
Ⅱ部では、渡された文字列に対して特定のイメージを返す、シンプルな
Web
アプリケーション
を開発します。これは、
GitHub
や
StackOverflow
で自分のイメージを設定していないユーザー
に使われる、
identicon
と似たものです。このアプリケーションは、プログラミング言語として
Python
を、
Web
フレームワークとして
Flask
を使います。このサンプルで
Python
を使うのは、
Python
が広く使われており、簡潔で読みやすいためです。
Python
でのプログラミング経験がな
くても心配することはありません。ここで焦点を当てるのは、
Docker
との関わりの部分であり、
Python
のコードの細部ではありません
†
。同様に、
Flask
を選択したのも、それが軽量で理解しや
すいためです。依存性の管理はすべて
Docker
で行うので、ホストのコンピュータに
Python
や
Flask
をインストールする必要はありません。
次章から開発を始めるのに先立ち、本章では、コンテナベースのワークフローの利用方法と、
ツールの準備に焦点を当てます。
5.1
"Hello World!"
さあ、まずは
"Hello World!"
を返すだけの
Web
サーバーを作ってみましょう。最初に、プロ
ジェクトを配置する
identidock
というディレクトリを作成します。そのディレクトリの中に、
Python
のコードを置く
app
というディレクトリを作成してください。そして
app
ディレクトリ内
に、
identidock.py ...
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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.