August 2016
Intermediate to advanced
384 pages
9h 20m
Japanese
Content preview from Docker
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273
12.1 クラスタリングとオーケストレーションのツール
12.1.3
Kubernetes
Kubernetes
（
http://kubernetes.io
）は、この
10
年以上にわたる実働環境でのコンテナの利用
経験を基にして、
Google
が構築したコンテナオーケストレーションツールです。
Kubernetes
は、
やや個性が強く、コンテナの構成とネットワーク接続について、いくつかの概念を強制します。理
解が必要な、主要な概念を以下に示します。
ポッド
ポッドは、まとめてデプロイされ、スケジューリングされるコンテナのグループです。他の
システムでは、一つ一つのコンテナがスケジューリングの単位になるのに対し、
Kubernetes
ではポッドがスケジューリングの基本単位を構成します。通常、ポッドには
1
つのサービス
を構成する、
1
個から
5
個のコンテナが含まれます。これらのユーザーコンテナに加えて、
Kubernetes
はロギングやモニタリングのサービスを提供する他のコンテナ群も動作させます。
Kubernetes
において、ポッドは短命のものとして扱われるので、システムが進化して行くに
つれて、ポッドは常に生成され、破棄されるものと考えなければなりません。
フラットなネットワーク空間
デフォルトの
Docker
のブリッジネットワークを使っている場合に比べると、
Kubernetes
で
のネットワーキングの動作は、大きく異なります。デフォルトの
Docker
のネットワーキング
では、コンテナはプライベートなサブネット中に置かれ、ポートをフォワードしたり、プロキ ...
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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.