Docker and WASM
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WASM and Docker can work together. WASM applications can run inside containers managed by Docker and containerd. Docker Desktop now supports running WASM modules via containerd-wasm-shim. The demo showed building a Rust application into a WASM module, packaging it in a Docker image, and running it in a container on the same network as normal containers. In the future, WASM could be used to run untrusted code securely inside containers and easily install plugins in desktop applications.
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Docker and WASM
- 1. WASM and Docker Antonis Kalipetis @akalipetis Docker Athens | #DockerAth
- 2. 👋 I’m Antonis * Software Engineer at Platform.sh * DevOps with LOGIC * Docker Captain * One half of mikrikouventa.fm * Python lover and Go developer * Docker and Containers aficionado * Everything that comes to my hands becomes a container
- 3. 🎯 Goals for the day * Better understand WASM * See how WASM plays with Docker * Explore the future of containers and WASM
- 6. * WASM stands for WebAssembly * WASM is a binary instruction format for a stack-based virtual machine * It was initially meant as a way to ship code in the web browser, other than JS 🤨 What is WASM?
- 7. * An efficient and fast way to compile and package applications written in a variety of languages * A way to run those application into sandboxed environments, either in the browser or elsewhere * An application format that can run in the same way between different environments, from edge servers to your browser and inside other applications 💡 What is WASM today?
- 8. * WASM is currently supported by all major web browsers, including Chrome, Firefox, and Safari * The standard is owned by W3C * Originally created to provide near-native speed code execution in the browser 🕸 The Web in WebAssembly
- 9. * Figma was written in WASM * CloudFlare workers run WASM * There was also WASM in Marathon’s latest Compensation Report 📸 WASM highlights
- 10. WASM And Docker
- 11. 🐳 Docker Desktop and WASM Docker Engine containerd-shim runc Container process containerd-shim runc Container process containerd-wasm -shim wasmedge Wasm Module
- 12. DEMO TIME!
- 13. * We built a Docker image using a Dockerfile, where the application was compiled from Rust code ⚙ into WASM * The .wasm application was copied to a SCRATCH image * WASM and normal containers were started, using the same network 🧵 What did just happen there?
- 14. * Boundaries are very constraint by design * WASI is being developed to provide a standardized interface for interacting with system resources * containerd has support for running different types of WASI interfaces https://github.com/containerd/runwasi 🏺 How are the applications contained?
- 15. * Very fast startup time (ms) * Single application for all architectures/OSes * Restrictive on the type of code you can run * Fast startup time * One image for each architecture/OS * Run everything a Linux machine can run 🥊 WASM vs Containers
- 16. * Manage large amounts of WASM containers * Run untrusted code with very specific boundaries * Easily install plugins to CLIs or other desktop applications 🔮 What could the future look like?
- 17. * OCI images are a great packaging format * containerd is a great tool for managing workloads * There are multiple orchestrators orchestrating workloads that run with containerd ❓ Docker, containers and WASM a few months in
- 19. Questions?