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The library is blocking end to end — vm::run waits on the machine for the payload's whole lifetime — so the async interior bought no concurrency (OCI layers download sequentially) and nothing any consumer shape could use; each call rented a tokio runtime with 'Failed to create Tokio runtime' as a user-visible failure mode. download.rs and registry.rs move to reqwest::blocking, folding the runtime wrappers away; distro.rs joins the same client shape, which also gives its metadata calls their first timeouts. The shared client bounds the connect and, for small metadata bodies, the whole request; transfers stay unbounded (the blocking client has no per-read window; a stalled stream is the operator's Ctrl-C). tokio and futures-util drop out as direct dependencies; tokio remains transitively under reqwest.
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))
}