April 2016
Intermediate to advanced
364 pages
7h 54m
Japanese
Content preview from 初めてのAnsible
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182
9 章 Ansible の高速化
どういったキャッシュベースのソリューションでも同じですが、キャッシュされたデータには、古
くなってしまうという危険性があります。CPU のアーキテクチャ（
ansible_architecture
ファク
トに保存されます）のように、ほとんど変化しないファクトもあります。あるいは、ホストマシン
から報告される日付や時刻（
ansible_date_time
ファクトに保存されます）のように、間違いなく
頻繁に変化するものもあります。
ファクトキャッシングを有効にすることにしたなら、playbook 中で使用するファクトの変化
の早さを把握し、ファクトキャッシングのタイムアウト値を適切に設定しなければなりません。
playbook の実行前にファクトキャッシュをクリアしたいなら、
ansible-playbook
に
--flush-
cache
フラグを渡してください。
例
9-7
ansible.cfg
でのファクトキャッシングの有効化
[defaults]
gathering = smart
#
タイムアウトを
24
時間に設定。必要に応じて調整する
fact_caching_timeout = 86400
#
ファクトキャッシングの実装の指定が必要
fact_caching = ...
ansible.cfg
で設定オプションの
gathering
を
"smart"
にしておくと、
Ansible
は
smart
gathering
を行います。これはすなわち、
Ansible
は収集対象のファクトがキャッシュにないか、 ...
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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.