February 2014
Intermediate to advanced
248 pages
4h 23m
Japanese
Content preview from 実践 Vagrant
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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.
88
5 章 複数マシン構成のクラスタのモデリング
これは、個別のサービスを実働環境と同様に適切に分離するのに便利です。こうす
れば、
Web
サーバーとデータベースサーバーを
2
つの別々の仮想マシンに置いてお
くことができます。この場合、ネットワークの障害をシミュレートし、その際のアプ
リケーションの動作を観察することがとても簡単にできます。
もちろん、多くの仮想マシンを動作させれば、コンピュータには負荷がかかるの
で、同時に動作させることができる仮想マシンの数にはそれなりの制約があります。
そのため、どのようにサービスを分離し、何台の仮想マシンに載せるかを決めるため
には、多少の作戦が必要になります。
5.1
複数の仮想マシンの実行
始める前に、
vagrant destroy
を実行して、既存の仮想マシンを必ず廃棄しておい
てください。このステップが必要になるのは、
Vagrantfile
内で複数の仮想マシンを
定義する過程で、
Vagrant
は動作中の既存のマシンについては認識できなくなってし
まうためです。これはバグであり、
Vagrant
の将来のバージョンで対処されることに
なるでしょう。現時点では、複数のマシンを設定する前にすべての仮想マシンを廃棄
しておくことで、この問題を回避しておくことができます。
次に、
Vagrantfile
を編集して、
2
台目のマシンを含めます。例として、本章では
Web
サーバーとデータベースサーバーをモデル化しましょう。
Vagrant::Config.run do |config|
config.vm.box ...
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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.