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/*!
* `House`s are where [crate::waifu::Waifu]s live (the physical hypervisors that
* libvirtd connects to
*/
use crate::waifu::*;
use crate::errors::Error;
use crate::van::Van;
use serde::{Serialize, Deserialize};
use virt::{connect::Connect, domain::Domain};
use std::process::{ExitStatus};
use std::os::unix::process::ExitStatusExt;
use rand::Rng;
use tokio::{process::Command, task::spawn_blocking};
#[derive(Serialize, Deserialize, Debug)]
pub enum Address {
IP(String),
Domain(String)
}
impl ToString for Address {
fn to_string(&self) -> String {
match self {
Address::IP(s) => s.clone(),
Address::Domain(s) => s.clone(),
}
}
}
/// Defines a "house" where waifus live
#[derive(Debug, Serialize, Deserialize)]
pub struct House {
/// Hostname
pub name: String,
/// FQDN or IP address, a way to talk to the house
pub address: String,
/// Connection to the House, if available
#[serde(skip)]
con: Option<Connect>,
}
impl House {
/// Creates a new House based on a libvirtd connect URL
///
/// Example:
/// ```
/// use waifulib::house::House;
/// let mut h: House = House::new("test:///default".to_string()).unwrap();
/// ```
pub fn new(url: String) -> Result<Self, Error> {
let mut c = Connect::open(&url.clone())?;
// If the connection succeeds, we've got one!
Ok(Self {
name: c.get_hostname()?,
address: c.get_uri()?,
con: Some(c),
})
}
/// Lists the "inhabitants" of the House (the [Waifu]s on the machine
///
/// ```
/// use waifulib::house::House;
/// let mut h: House = House::new("test:///default".to_string()).unwrap();
///
/// assert_eq!(h.inhabitants().unwrap().len(), 1);
/// ```
pub fn inhabitants(&mut self) -> Result<Vec<Waifu>, Error> {
match &self.con {
Some(c) => {
let domains = c.list_all_domains(0)?;
let mut waifus: Vec<Waifu> = Vec::new();
for d in domains.iter() {
waifus.push(d.clone().try_into()?);
}
Ok(waifus)
},
None => {
return Err(Error::Connection("Domain connection was None".to_string()));
}
}
}
/// Introduces a new Waifu into the House, taking care of everything needed to make the VM run
/// fine
///
/// If the installation image doesn't exist in the default libvirtd pool, this will fail with
/// [`Error::MissingImage`][crate::errors::Error::MissingImage].
///
/// ```
/// use waifulib::house::House
///
/// let mut h: House = House::new("test:///default".to_string()).unwrap();
///
/// h.introduce("test-2", 1024, 1, 20000, "test.iso").unwrap();
/// ```
pub async fn introduce(&mut self, name: String, max_mem: Memory, max_cpus: CpuCount, disk_size_mb: u64, van: Van) -> Result<Waifu, Error> {
// Check for image on host machine
let mut output = Command::new("ssh")
.args([
"-oStrictHostKeyChecking=accept-new",
&self.address.clone(),
"stat",
&format!("/var/lib/libvirt/images/{}", van.make_pretty_name().clone())
])
.output()
.await?;
if output.status != ExitStatus::from_raw(0) {
return Err(Error::MissingImage(van.name.clone()));
}
// Allocate VM disk
output = Command::new("ssh")
.args([
"-oStrictHostKeyChecking=accept-new",
&self.address.clone(),
"qemu-img",
"create",
"-f",
"qcow2",
&format!("/var/lib/libvirt/images/{}.qcow2", name.clone()),
&format!("{}M", disk_size_mb)
])
.output()
.await?;
if output.status != ExitStatus::from_raw(0) {
return Err(Error::Allocation(String::from_utf8(output.stdout).unwrap()));
}
let uuid = uuid::Uuid::new_v4();
// Let's get that XML ready
let mut buf: Vec<u8> = vec![];
crate::templates::vm_xml(
&mut buf,
name.clone(),
uuid.to_string(),
random_mac().clone(),
true,
max_mem.0,
max_cpus.0,
"blank".to_string()
)?;
let buf = String::from_utf8(buf).unwrap();
println!("{}", buf);
let dom: Domain = match &self.con {
Some(c) => {
let dom = Domain::define_xml(&c, &buf)?;
dom.create()?;
dom
},
None => {
return Err(Error::Connection("Connection was None".to_string()));
}
};
dom.try_into()
}
}
fn random_mac() -> String {
let mut addr = rand::thread_rng().gen::<[u8; 6]>();
addr[0] = (addr[0] | 2) & 0xfe;
mac_address::MacAddress::new(addr).to_string()
}
#[cfg(test)]
mod test {
use super::*;
/// Kind of a stupid test, but just a sanity check to make sure that [ToString] impl up above
/// is still working
#[test]
fn addr_to_string() {
let a: Address = Address::IP("127.0.0.1".to_string());
let d: Address = Address::Domain("example.com".to_string());
assert_eq!(String::from("127.0.0.1"), a.to_string());
assert_eq!("example.com".to_string(), d.to_string());
}
#[test]
fn connect_to_house() {
let _: House = House::new("test:///default".to_string()).unwrap();
}
#[test]
fn list_inhabitants() {
let mut h: House = House::new("test:///default".to_string()).unwrap();
assert_eq!(h.inhabitants().unwrap().len(), 1);
}
}
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