Supercharge Your Deployments with WASM

Rishit Dagli

OTC Catchup

@rishit_dagli

WebAssembly

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Binary instruction format for a virtual machine

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A format to define instructions that an appropriate interpreter can efficiently execute.

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Designed as a compilation target

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Wasm beyond the web

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• fast, scalable, secure way to run the same code across all machines

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs

standard, platform-independent methods

to declare and apply

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs
• standard, platform-independent methods to declare and apply
• Binary compatibility

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs
• standard, platform-independent methods to declare and apply
• Binary compatibility

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs
• standard, platform-independent methods to declare and apply
• Binary compatibility
• Aside: Some Nostalgia

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs
• standard, platform-independent methods to declare and apply
• Binary compatibility
• Aside: System Interface
• Aside: Some Nostalgia

rishit_dagli

System Interface

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System Interface

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System Interface

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System Interface

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs
• standard, platform-independent methods to declare and apply
• Binary compatibility
• Aside: System Interface
• Aside: Some Nostalgia

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Some Nostalgia

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• Emscripten was already emulating a system interface, POSIX, on the web
• Implementation of libc had to be used with JS glue code which would be called in the browser and would talk to the kernel
• Runtimes re-implement the JS glue code and emulate a browser
• Not great

rishit_dagli

Wasm beyond the web

​

• fast, scalable, secure way to run the same code across all machines
• safe and portable, we want:
• users and programs can do what they have the right to do
• do not create problems for other users and programs
• standard, platform-independent methods to declare and apply
• Binary compatibility
• Enter WebAssembly System interface (WASI)🎉

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System interface

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• C gives you direct access to system resources
• far too important for stability and security

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Source: Lin Clark

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WASI

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• modular set of standardized system interfaces
• wasi-core, file-oriented approach, where you have system calls such as open, close, read, and write and everything else basically provides augmentations on top
• host can choose what all system calls are allowed on a program-by-program basis
• openat-like system call, needs file descriptors

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WASI

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Source: Lin Clark

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Source: Lin Clark

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Can you run Wasm workloads in Kubernetes?

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Slight

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Slight

Containerd Wasm Shims

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Linux and Wasm containers

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• Linux and Wasm Containers side-by-side
• Not replace

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Already out of time, if anyone is interested to explore further

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bit.ly/otcdemo

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Summary

Why WASM needs Kubernetes

• All cloud providers have Kubernetes offerings
• Good adoption in enterprises
• Vibrant community
• A huge ecosystem that can be used
• Proven scaling solution

Why Kubernetes needs WASM

• Tiny containers
• Faster startup
• Lower network traffic
• Platform independent

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Different areas for a model to optimize

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Reach out to me!

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Rishit Dagli

Twitter: @rishit_dagli

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These slides: bit.ly/otcslides

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