March 2017
Intermediate to advanced
352 pages
9h 3m
Japanese
Content preview from Infrastructure as Code ―クラウドにおけるサーバ管理の原則とプラクティス
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3.3
インフラストラクチャ定義ツールの操作
49
提供する既成の定義タイプでは不十分な場合でも、ほぼすべてのツールで、チームがカスタム定義を
書けるようになっている。
3.2.1
構成定義の再利用可能性
統一的なインフラと反復可能なプロセスを実現するためには、要素や環境の違いを越えて構成定義
を再利用できるようにすることが必要不可欠だ。QA、ステージング、本番環境で 3種類の異なる定義
ファイルを用意するのではなく、同じ定義ファイルを 3つの用途で使い分けられなければならない。イ
ンフラの構成 / 設定のための DSLでまともなものなら、パラメータを使うための方法を提供している。
例3-2は、作成するVMサイズ、サーバー作成のために使うAMIイメージ、ウェブサーバーが実行
される環境の名前を指定するためのパラメータを受け付けている例である。
例3-2 パラメータ化された環境定義
aws_instance: web_server
name: web-${var.environment}
ami: ${var.web_server_ami}
instance_type: ${var.instance_type}
インフラストラクチャツールがこの定義を適用するときのパラメータの渡し方には、コマンドライン
パラメータ、環境変数、ファイルや構成レジストリサービス（この章で後述）の読み込みなどがある。
パラメータは、コマンドラインから手作業で入力するのではなく、統一的に反復可能な形で与えなけ
ればならない。変更管
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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.