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//! The `new` sub-command.
use crate::cloudinit::{CloudInitConfig, CloudInitError};
use crate::image::{ImageError, VirtualMachineImage};
use crate::install::{virt_install, VirtInstallArgs, VirtInstallError};
use crate::spec::Specification;
use bytesize::GIB;
use log::info;
use std::net::TcpStream;
const SSH_PORT: i32 = 22;
/// Errors returned by this module.
#[derive(Debug, thiserror::Error)]
pub enum NewError {
/// Problem with cloud-init configuration.
#[error(transparent)]
CloudInitError(#[from] CloudInitError),
/// Problem creating VM image.
#[error(transparent)]
ImageError(#[from] ImageError),
/// Problem with libvirt.
#[error(transparent)]
VirtInstallError(#[from] VirtInstallError),
}
/// The `new` sub-command.
///
/// Create all the new virtual machines specified by the caller. Wait
/// until each VM's SSH port listens for connections.
pub fn new(specs: &[Specification]) -> Result<(), NewError> {
for spec in specs {
info!("creating new VM {}", spec.name);
info!("creating cloud-init config");
let init = CloudInitConfig::from(&spec)?;
info!(
"creating VM image {} from {}",
spec.image.display(),
spec.base.display()
);
let image = VirtualMachineImage::new_from_base(&spec.base, &spec.image)?;
info!("resizing image to {} GiB", spec.image_size_gib);
image.resize(spec.image_size_gib * GIB)?;
info!("creating VM");
let mut args = VirtInstallArgs::new(&spec.name, &image, &init);
args.set_memory(spec.memory_mib);
args.set_vcpus(spec.cpus);
virt_install(&args)?;
info!("waiting for {} to open its SSH port", spec.name);
wait_for_port(&spec.name, SSH_PORT)?;
}
Ok(())
}
fn wait_for_port(name: &str, port: i32) -> Result<(), NewError> {
let addr = format!("{}:{}", name, port);
loop {
if TcpStream::connect(&addr).is_ok() {
return Ok(());
}
}
}
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