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vhaudiquet
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mke2fs built against libarchive populates an ext4 from a tarball in one pass; Homebrew's bottle is not built that way, so when the found mke2fs cannot take a tarball the builder unpacks the rootfs with the library's own tar decoder and populates from the directory — slower, and the run says so. The mkfs child is exec'd fresh, so it reads DYLD_FALLBACK_LIBRARY_PATH (libarchive's keg) at startup.
ecrou
a small microVM runtime based on libkrun
Try ecrou in the terminal
Installation
ecrou is available as a strictly confined snap:
sudo snap install ecrou
sudo snap connect ecrou:kvm
Usage
$ ecrou run -it ubuntu
root@ecrou-vm-m2glhl:/#
Embed ecrou into your project
ecrou is both a library and a tiny CLI frontend around it. The library is embeddable into any project, allowing to use microVMs easily.
Rust
ecrou is a Rust library, which can just be called:
use ecrou::vm::RunOptions;
use ecrou::NoProgress;
fn main() -> ecrou::Result<std::process::ExitCode> {
let code = ecrou::vm::run(
&RunOptions {
image: "ubuntu:resolute".into(),
command: vec!["uname".into(), "-a".into()],
..RunOptions::default()
},
&NoProgress,
)?;
Ok(std::process::ExitCode::from(code.clamp(0, 255) as u8))
}