May 2024
Intermediate
248 pages
6h 59m
Japanese
Content preview from 図解まるわかり 仮想化のしくみ
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2-5～ 2-8 で解説したコンテナは、アプリケーションの担当者がカー
ネル以外の領域を自由に構成でき、Dockerfi le を書けば欲しい環境イメー
ジを手に入れ、検証／本番環境で実行できるメリットがあります。一方で
ベースとなる Docker イメージはアプリケーションの実行に直接関係のない
ライブラリやパッケージが含まれていたりします。コンテナを使う場合、
アプリケーションを含むコンテナイメージをベースとなるDockerfi leで構築
する関係上、これまではインフラ構築の範囲で実装していたユーザーラン
ド部分をアプリケーションの担当者が実装する必要があります（図12-15）。
ユーザーランド部分があると、その部分のセキュリティ管理も必要と
なります。ユーザーランド部分を極力小さくして余計なものをコンテナ
に含めないように、マルチステージビルドというしくみを採用したり、
DevSecOpsという枠組みでコンテナの脆弱性スキャンのしくみが発展
したりしていますが、アプリケーションの担当者の負荷は高まりつつあ
ります。
このような状況はアプリケーションの担当者にとっては望ましい状況で
はありません。このような点でもWasmが注目されています。Wasmでは
各言語で書かれたアプリケーションをコンパイルして作成されたWasm
バイナリが提供されます。Wasmバイナリには言語ランタイムを含みます
が、コンテナと比較すると削減することが可能です。
将来的にコンポーネントモデルが提供されれば、Wasmアプリはアプリ ...
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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.