supermachine 0.7.108

//! One-shot guest recon: boot a snapshot, run a shell command, print output.
//! SUPERMACHINE_RECON_SNAPSHOT, SUPERMACHINE_RECON_CMD, SUPERMACHINE_RECON_MEM_MIB (default 8192).
#[cfg(all(target_os = "linux", target_arch = "x86_64"))]
fn main() {
    use std::time::Duration;
    use supermachine::{Image, VmConfig};
    let snap = std::env::var("SUPERMACHINE_RECON_SNAPSHOT").expect("SUPERMACHINE_RECON_SNAPSHOT");
    let cmd = std::env::var("SUPERMACHINE_RECON_CMD").expect("SUPERMACHINE_RECON_CMD");
    let mem: u32 = std::env::var("SUPERMACHINE_RECON_MEM_MIB")
        .ok()
        .and_then(|v| v.parse().ok())
        .unwrap_or(8192);
    let cfg = VmConfig::new().with_memory_mib(mem);
    let vm = Image::from_snapshot(&snap)
        .expect("from_snapshot")
        .start(&cfg)
        .expect("start");
    for _ in 0..120 {
        if let Ok(o) = vm
            .exec_builder()
            .argv(["/bin/sh", "-c", "echo up"])
            .output()
        {
            if o.success() {
                break;
            }
        }
        std::thread::sleep(Duration::from_millis(1000));
    }
    let o = vm
        .exec_builder()
        .argv(["/bin/sh", "-c", &cmd])
        .output()
        .expect("exec");
    println!("RECON_STDOUT_BEGIN");
    println!("{}", String::from_utf8_lossy(&o.stdout));
    println!("RECON_STDOUT_END success={}", o.success());
    eprintln!("stderr: {}", String::from_utf8_lossy(&o.stderr));
    vm.stop().ok();
}
#[cfg(not(all(target_os = "linux", target_arch = "x86_64")))]
fn main() {
    eprintln!("linux/x86_64 only");
}