webvm

Maybe WebVM is something you are looking for [0]. [0] https://github.com/leaningtech/webvm

Performance is expected to be between 3x-10x slowdown depending on the workload, which for this class of systems is quite good. The gap, especially on the high end, will further shrink as the virtualization engine improves. Not all parts of the ISA are as well optimized currently. The codegen for integer operations (the most common by far) is very sophisticated. Floating point and vector operations still have a pretty basic implementation. WebVM can run any distro, barring bugs in our syscall layer of course :-) You can add your own Dockerfile and deploy a custom version on GitHub: https://github.com/leaningtech/webvm/?tab=readme-ov-file#for...

I stumbled upon Leaningetch in the past looking for a way to compile Java to JavaScript. This is a company that found a niche in "modernizing" old software, like, serving customers that still have mission-critical software written as a C++/MFC or even Java Applets and help them keep that software alive. There's nothing wrong with their niche, but I feel like there's a big disconnect to what could be attractive to the HN crowd. In particular: > WebVM is released under the Apache License, Version 2.0 [...] free to use for technological exploration, testing and non-commercial uses. [...] If you want to build a product on top of CheerpX/WebVM, please get in touch: sales@leaningtech.com. [0] Embarcadero is another company that releases great-looking tech but I would personally not want to dig too much into [1], because of the involved costs. -

Well, the environment itself is a container. Supporting Linux "namespaces" used to implement containers is also a possibility. As described in the project README we provide a GitHub Action workflow to convert Dockerfiles into bootable images for WebVM: https://github.com/leaningtech/webvm

1. Support for traditional copy/paste shortcuts is problematic, since Ctrl-C is interpreted as the SIGINT signal. Copying via the mouse menu should work. Pasting is supported via Ctrl+Shift+V. 2. We had these reported from several users and we will investigate as soon as we can: https://github.com/leaningtech/webvm/issues/102 To answer you question: filesystem chunks are cached/persisted using a local IndexedDB. It provides a fairly strong level of persistence, although the user can wipe it out of course.

Per their docs, yes: https://github.com/leaningtech/webvm/blob/main/docs/Tailscal...

"password", per https://github.com/leaningtech/webvm/blob/main/dockerfiles/d...

webvm has [Tailscale] sockets-over-WebSockets for networking: https://github.com/leaningtech/webvm and: > 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. How do CheerpX and Cartesi Machine compare?

WebVM runs x86 binaries in WASM on any browser w/ ("[CheerpX:] an x86-to-WebAssembly JIT compiler, a virtual block-based file system, and a Linux syscall emulator") and for external sockets there's Tailscale networking. https://webvm.io/ IIUC that means an SSH (and/or MoSH Mobile Shell) client in a WASM WebVM in a browser tab could connect to a (tailscale (wg)) VPN mesh? (And JupyterLite+WebVM could ssh over an in-browser VPN mesh) You'd probably need to compile a userspace wireguard implementation with a fork of the WebVM Dockerfile, or is that redundant because tailscale already wg's the sockets?: https://github.com/leaningtech/webvm/blob/main/dockerfiles/d...

The repo doesn't contain the actual distro itself, it appears to be loading CheerPX's virtualisation engine and feeding it a disk image here https://github.com/leaningtech/webvm/blob/6efab7e60bf6f173a2... Assuming they wrote their own xterm interface (no idea if they did, I got as far as that), seems everything open-source is fetched by the client at runtime. This feels to me more like a bootloader than an OS. Not sure where that lands it license-wise whether merely linking to the image requires appropriate licensing and attribution but either way the work seems pretty straightforward to replicate assuming you have / can supply an xterminal-esque interface and can compile your OS image appropriately. I don't think they're doing anything wrong licensing-wise but I guess it depends on how the law defines including software as a library, whe

License check without commentary. > Copyright (c) Leaning Technologies Limited. All rights reserved. https://github.com/leaningtech/webvm/commit/6efab7e60bf6f173...