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|
use bytesize::GIB;
use log::{debug, info};
use std::fs;
use std::net::TcpStream;
use std::path::{Path, PathBuf};
use std::thread;
use std::time::Duration;
use structopt::StructOpt;
use virt::connect::Connect;
use vmadm::cloudinit::CloudInitConfig;
use vmadm::image::VirtualMachineImage;
use vmadm::install::{virt_install, VirtInstallArgs};
use vmadm::spec::Specification;
const SSH_PORT: i32 = 22;
#[derive(StructOpt, Debug)]
enum Cli {
New {
#[structopt(help = "create a new virtual machine", parse(from_os_str))]
spec: PathBuf,
},
List,
Delete {
#[structopt(help = "create a new virtual machine", parse(from_os_str))]
spec: PathBuf,
},
}
fn main() -> anyhow::Result<()> {
pretty_env_logger::init();
match Cli::from_args() {
Cli::New { spec } => new(&spec)?,
Cli::List => list()?,
Cli::Delete { spec } => delete(&spec)?,
}
Ok(())
}
fn new(spec: &Path) -> anyhow::Result<()> {
info!("creating new VM");
debug!("reading specification from {}", spec.display());
let spec = fs::read(spec)?;
let spec: Specification = serde_yaml::from_slice(&spec)?;
debug!("reading specified SSH public keys");
let ssh_keys = spec.ssh_keys()?;
info!("creating cloud-init config");
let mut init = CloudInitConfig::default();
init.set_hostname(&spec.name);
init.set_authorized_keys(&ssh_keys);
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) -> anyhow::Result<()> {
let addr = format!("{}:{}", name, port);
loop {
match TcpStream::connect(&addr) {
Ok(_) => return Ok(()),
Err(_) => (),
}
}
}
fn list() -> anyhow::Result<()> {
let conn = Connect::open("qemu:///system")?;
let domains = conn.list_all_domains(0)?;
for domain in domains {
let name = domain.get_name()?;
let (state, _) = domain.get_state()?;
let state = state_name(state);
println!("{} {}", name, state);
}
Ok(())
}
fn state_name(state: virt::domain::DomainState) -> String {
let name = match state {
virt::domain::VIR_DOMAIN_NOSTATE => "none",
virt::domain::VIR_DOMAIN_RUNNING => "running",
virt::domain::VIR_DOMAIN_BLOCKED => "blocked",
virt::domain::VIR_DOMAIN_PAUSED => "paused",
virt::domain::VIR_DOMAIN_SHUTDOWN => "shutdown",
virt::domain::VIR_DOMAIN_SHUTOFF => "shutoff",
virt::domain::VIR_DOMAIN_CRASHED => "crashed",
virt::domain::VIR_DOMAIN_PMSUSPENDED => "power management suspended",
_ => "unknown",
};
name.to_string()
}
fn delete(spec: &Path) -> anyhow::Result<()> {
info!("deleting virtual machine specified in {}", spec.display());
debug!("reading specification from {}", spec.display());
let spec = fs::read(spec)?;
let spec: Specification = serde_yaml::from_slice(&spec)?;
debug!("connecting to libvirtd");
let conn = Connect::open("qemu:///system")?;
debug!("listing all domains");
let domains = conn.list_all_domains(0)?;
for domain in domains {
debug!("considering {}", domain.get_name()?);
if domain.get_name()? == spec.name {
debug!("shutdown {}", spec.name);
domain.shutdown().ok();
let briefly = Duration::from_millis(1000);
loop {
thread::sleep(briefly);
match domain.is_active() {
Ok(true) => (),
Ok(false) => break,
Err(err) => {
debug!("is_active: {}", err);
()
}
}
debug!("{} is still running", spec.name);
}
debug!("undefine {}", spec.name);
domain.undefine()?;
debug!("removing image file {}", spec.image.display());
std::fs::remove_file(&spec.image)?;
}
}
Ok(())
}
|
