April 2016
Intermediate to advanced
364 pages
7h 54m
Japanese
Content preview from 初めてのAnsible
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283
14
章
Playbook
のデバッグ
現実に向き合いましょう。間違いは起こるものです。
playbook
のバグであれ、コントロールマ
シン上の設定ファイル内の間違っている設定値であれ、何かがうまくいかないことはいつか起こり
ます。この最終章では、こうしたエラーを追跡するための役に立つテクニックを紹介していきま
す。
14.1
SSH
の問題のデバッグ
Ansible
が、ホストにうまく
SSH
で接続できないことがあります。そうなった場合には、
Ansible
が
SSH
のクライアントに渡している引数を正確に知り、コマンドラインから同じ問題を
再現できると役に立つでしょう。
ansible-playbook
に
-vvv
という引数を渡して呼び出すと、
Ansible
が呼び出した
SSH
のコマン
ドをそのまま見ることができるので、デバッグに役立つことがあります。
例
14-1
は、ファイルをコピーするモジュールを実行した際の
Ansible
の出力です。
例
14-1
verbose
フラグを指定した場合の出力例
TASK: [copy TLS key] **********************************************************
<127.0.0.1> ESTABLISH CONNECTION FOR USER: vagrant
<127.0.0.1> ESTABLISH CONNECTION FOR USER: vagrant
<127.0.0.1> EXEC ['ssh', '-C', '-tt', ...
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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.