May 2022
Intermediate
240 pages
6h 57m
Japanese
Content preview from 図解まるわかり AWSのしくみ
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前節で解説したコンテナのしくみを利用すると、サービスや機能ごとに
コンテナを作成して、それぞれの仮想サーバーを構築することも可能で
す。
Webシステムを例に挙げれば、認証、DB、データ分析、データ表示な
どのサービスごとにコンテナを作成します。それぞれのサービスやアプリ
ケーションがOSSを利用していて、頻繁にバージョンやレベルアップの
更新作業が必要となりますが、あらかじめ別の仮想サーバーにしておくこ
とで、他のサーバーに影響を与えることなくスムーズな更新が可能となり
ます。
一連のコンテナの管理
それぞれのサービスのコンテナは、Dockerとネットワークの環境があ
れば、必ずしも同一の物理サーバー上に搭載する必要はありません。ただ
し、一連のサービスを管理して、どの順番でサービスを動作させる、など
の異なるサーバー間に存在するコンテナの関係性を管理するオーケストレ
ーションが必要となります（図5-15）。
オーケストレーションの代表的なOSSとして Kubernetes（クーバネ
ティス）があります。Kubernetesのようなソフトがあると、コンテナはど
こにあってもよいので、大量のデータ分析に強い高性能なサーバー、認証
に特化した普及版のサーバーなどに分けることも可能です。クラウド事業
者間をまたぐこともできます（図5-16）。
AWSでは Docker のコンテナに対応していて、さらに Kubernetesと互換
のサービスも提供しています。中心となるサービスとして、Amazon
Elastic ...
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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.