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README
Apache-2.0

WebVM

Discord server Issues

This repository hosts the source code for https://webvm.io, a Linux virtual machine that runs in your browser.

WebVM is a server-less virtual environment running fully client-side in HTML5/WebAssembly. It's designed to be Linux ABI-compatible. It runs an unmodified Debian distribution including many native development toolchains.

WebVM is powered by the CheerpX virtualization engine, and enables safe, sandboxed client-side execution of x86 binaries on any browser. CheerpX includes an x86-to-WebAssembly JIT compiler, a virtual block-based file system, and a Linux syscall emulator.

Enable networking

  • Click "Connect via Tailscale" in the page header.
  • Log in to Tailscale (create an account if you don't have one).
  • If you are unfamiliar with Tailscale or would like additional information see WebVM and Tailscale.

Fork, deploy, customize

deploy_instructions_gif
  • Fork the repository.
  • Enable Github pages in settings.
    • Click on Settings.
    • Go to the Pages section.
    • Select Github Actions as the source.
  • Run the workflow.
    • Click on Actions.
    • Accept the prompt. This is required only once to enable Actions for your fork.
    • Click on the workflow named Deploy.
    • Click Run workflow and then once more Run workflow in the menu.
  • After a few seconds a new Deploy workflow will start, click on it to see details.
  • After the workflow completes, which takes a few minutes, it will show the URL below the deploy_to_github_pages job.

You can now customize dockerfiles/debian_mini to suits your needs, or make a new Dockerfile from scratch. Use the Path to Dockerfile workflow parameter to select it.

Local deployment

From a local git clone

  • Download the debian_mini Ext2 image from https://github.com/leaningtech/webvm/releases/.
    • You can also build your own by selecting the "Upload GitHub release" workflow option.
    • Place the image in the repository root folder.
  • Edit index.html.
    • Uncomment the default values for CMD, ARGS, ENV and CWD.
    • Replace DEVICE_TYPE with "bytes".
    • Replace IMAGE_URL with the name of the Ext2 image. For example "debian_mini_20230519_5022088024.ext2".
  • Start a local HTTP server.
  • Enjoy your local WebVM.

Example customization: Python3 REPL

The Deploy workflow takes into account the CMD specified in the Dockerfile. To build a REPL you can simply apply this patch and deploy.

diff --git a/dockerfiles/debian_mini b/dockerfiles/debian_mini
index 2878332..1f3103a 100644
--- a/dockerfiles/debian_mini
+++ b/dockerfiles/debian_mini
@@ -15,4 +15,4 @@ WORKDIR /home/user/
 # We set env, as this gets extracted by Webvm. This is optional.
 ENV HOME="/home/user" TERM="xterm" USER="user" SHELL="/bin/bash" EDITOR="vim" LANG="en_US.UTF-8" LC_ALL="C"
 RUN echo 'root:password' | chpasswd
-CMD [ "/bin/bash" ]
+CMD [ "/usr/bin/python3" ]

Bugs and Issues

Please use Issues to report any bug. Or come to say hello / share your feedback on Discord.

More links

Thanks to...

This project depends on:

Versioning

WebVM depends on the CheerpX x86-to-WebAssembly virtualization technology. A link to the current latest build is always available at https://cheerpxdemos.leaningtech.com/publicdeploy/LATEST.txt. Builds of CheerpX are immutable and uniquely versioned. An example link would be:

https://cheerpxdemos.leaningtech.com/publicdeploy/20230517_94/cx.js

We strongly encourage users not to use the latest build. Please directly use a specific build to avoid unexpected regressions. Since builds are immutable, if they work for you now they will keep working forever.

License

WebVM is released under the Apache License, Version 2.0.

You are welcome to use, modify, and redistribute the contents of this repository.

The public CheerpX deployment is provided as-is and is free to use for technological exploration, testing and non-commercial uses. Downloading a CheerpX build for the purpose of hosting it elsewhere is not permitted.

If you want to build a product on top of CheerpX/WebVM, please get in touch: sales@leaningtech.com

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WebVM 是一个在浏览器中运行的 Linux 虚拟机 展开 收起
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