April 2016
Intermediate to advanced
364 pages
7h 54m
Japanese
Content preview from 初めてのAnsible
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142
7 章 複雑な Playbook
7.9
ホスト指定のパターン
ここまでは、
play
中の
host
パラメータは、以下のように単一のホストもしくはグループを指定
してきました。
hosts: web
単一のホストあるいはグループを指定する代わりに、パターンを指定することができます。ここ
までには
all
パターンを見ました。これは、既知のすべてのホストに対して
play
を実行します。
hosts: all
コロンを使って、
2
つのグループの和集合を指定することもできます。以下の例では、
dev
及び
staging
のすべてのマシンを指定しています。
hosts: dev:staging
コロンとアンパーサントを使えば、積集合を指定することができます。例えば、
staging
環境内
のすべてのデータベースサーバーを指定するには以下のようにします。
hosts: staging:&database
表
7-2
は、
Ansible
がサポートしているパターンです。正規表現のパターンは、常にチルダで始
まることに注意してください。
表
7-2
サポートされているパターン
アクション 使用例
すべてのホスト
all
すべてのホスト
*
和集合
dev:staging
積集合
staging:&database
除外
dev:!queue
ワイルドカード
*.example.com
番号が振られたサーバーの範囲指定
web[5:10]
正規表現
~web\d\.example\.(com
Ansible
は、複数のパターンの組み合わせもサポートしています。例をご覧ください。
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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.