April 2016
Intermediate to advanced
364 pages
7h 54m
Japanese
Content preview from 初めてのAnsible
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285
14.3 Assert モジュール
この場合は、問題のエントリを
~/.ssh/known_hosts
ファイルから削除すべきです。
14.2
Debug
モジュール
本書では、何回か
debug
モジュールを使いました。これは
Ansible
における
print
文です。例
14-2
では、このモジュールを使って変数の値や任意の文字列を出力しています。
例
14-2
debug
モジュールの使用例
- debug: var=myvariable
- debug: msg="The value of myvariable is {{ var }}"
4
章で議論した通り、以下のようにすれば現在のホストに関連するすべての変数を出力できます。
- debug: var=hostvars[inventory_hostname]
14.3
Assert
モジュール
assert
モジュールは、指定された条件が満たされなければエラーを起こしてくれます。例えば、
以下の例では
eth1
というインターフェースがなければ
playbook
は失敗します。
- name: assert that eth1 interface exists
assert:
that: ansible_eth1 is defined
playbook
をデバッグする場合、アサーションを挿入しておき、予想と異なる状況が生じたらす
ぐにエラーを起こすようにしておくと便利なことがあります。
ホストのファイルシステムの何らかのファイルの状態をチェックしたい場合には、まず
stat
モ
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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.