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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ここまで述べてきたようなメリットがあるWasm ですが、サーバーサイド
で実行させるためにはWasmアプリを管理するしくみが必要です。2-9
でDockerコンテナ管理のためにKubernetesというしくみがあることを説
明しましたが、Wasmアプリも Kubernetesが利用しているのと同様のしく
みでコンテナオーケストレーションができます。Kubernetesはcontainerd
を経由してコンテナを管理できますが、Wasm では containerd-wasm-shim
のwasmedge を経由して Wasm アプリを管理できます（図 12-19）。
Microsoft Azure の AKS ではrunwasi を使用したWasmの実行がプレビ
ューサポートとなっています（2024年3月現在）。また、HashiCorp社も自
社の提供するコンテナに依存しないアプリケーションオーケストレーショ
ンプラットフォームであるNomad で Wasm の実行をサポートしています。
WASIは 2019 年に策定が開始された比較的新しい仕様です。WASI
Preview 1 では、POSIX（Portable Operating System Interface）に似た基本
的な機能としてファイル、ネットワーク、クロック、乱数などの機能を
wasi-coreと呼ばれるコア機能でカバーしています。WASI Preview 2 では、
POSIX的なAPIの実装を超えて、キーバリューやH
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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.