1. Your first provision script

A provision block that waits for the guest and configures it through the typed API.

A provision "scripts/setup.ws" { } block runs its script after vmlab up boots the VMs (scope it with vms = ["dc01"] to run only when those VMs come up). The script's fn main(lab: Lab) receives the running lab; lab.vm("alp")? yields a VM handle whose wait_ready(secs) blocks until the guest agent answers and whose exec runs guest commands with a typed ExecResult back.

This replaces chains of vmlab exec calls: one script, real control flow, real error handling.

§ 1Exercise: Wait, exec, report

Write scripts/setup.ws that waits for the guest and logs its Alpine release, then re-run vmlab up.

use vmlab

fn main(lab: Lab) {
    let alp = lab.vm("alp").expect("no vm alp")
    alp.wait_ready(600).expect("agent never came up")
    let rel = alp.exec("/bin/cat", ["/etc/alpine-release"]).expect("exec failed")
    lab.log("alpine release: " + rel.stdout.trim())
}