April 2016
Intermediate to advanced
364 pages
7h 54m
Japanese
Content preview from 初めてのAnsible
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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.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.
241
12.15 仕上げ
12.14
冪等性を持つインスタンスの起動方法
ec2
モジュールを呼び出す
playbook
は、一般には冪等ではありません。例
12-6
を複数回実行す
れば、
EC2
は複数のインスタンスを生成してしまいます。
パラメータの
count_tag
及び
exact_count
を使えば、
ec2
モジュールを使って冪等な
playbook
を書くことができます。
3
つのインスタンスを起動する
playbook
を書きたいとしましょう。この
playbook
には冪等性
を持たせたいので、すでに
3
つのインスタンスが動作しているなら、この
playbook
には何もさせ
たくありません。例
12-12
はそういった
playbook
の例です。
例
12-12
冪等性を持つインスタンスの生成
- name: start the instance
ec2:
image: ami-8caa1ce4
instance_type: m3.medium
key_name: mykey
group: [web, ssh, outbound]
instance_tags: { type: web, env: production }
exact_count: 3
count_tag: { type: web }
exact_count: 3
というパラメータは、
Ansible
に対して
count_tag
で指定されたタグにマッチ
するインスタンスが、厳密に
3
つだけ動作していることを保証させます。この例では
count_tag
で指定しているタグは ...
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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.