mirror of
https://github.com/edera-dev/krata.git
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feature(krata): rename guest to zone (#266)
This commit is contained in:
Alex Zenla
GitHub
374
crates/daemon/src/reconcile/zone/mod.rs
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374
crates/daemon/src/reconcile/zone/mod.rs
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@ -0,0 +1,374 @@
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use std::{
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collections::{hash_map::Entry, HashMap},
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path::PathBuf,
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sync::Arc,
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time::Duration,
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};
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use anyhow::Result;
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use krata::v1::{
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common::{Zone, ZoneErrorInfo, ZoneExitInfo, ZoneNetworkState, ZoneState, ZoneStatus},
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control::ZoneChangedEvent,
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};
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use krataoci::packer::service::OciPackerService;
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use kratart::{Runtime, ZoneInfo};
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use log::{error, info, trace, warn};
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use tokio::{
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select,
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sync::{
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mpsc::{channel, Receiver, Sender},
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Mutex, RwLock,
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},
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task::JoinHandle,
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time::sleep,
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};
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use uuid::Uuid;
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use crate::{
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db::ZoneStore,
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devices::DaemonDeviceManager,
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event::{DaemonEvent, DaemonEventContext},
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zlt::ZoneLookupTable,
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};
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use self::start::ZoneStarter;
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mod start;
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const PARALLEL_LIMIT: u32 = 5;
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#[derive(Debug)]
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enum ZoneReconcilerResult {
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Unchanged,
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Changed { rerun: bool },
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}
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struct ZoneReconcilerEntry {
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task: JoinHandle<()>,
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sender: Sender<()>,
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}
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impl Drop for ZoneReconcilerEntry {
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fn drop(&mut self) {
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self.task.abort();
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}
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}
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#[derive(Clone)]
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pub struct ZoneReconciler {
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devices: DaemonDeviceManager,
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zlt: ZoneLookupTable,
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zones: ZoneStore,
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events: DaemonEventContext,
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runtime: Runtime,
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packer: OciPackerService,
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kernel_path: PathBuf,
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initrd_path: PathBuf,
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addons_path: PathBuf,
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tasks: Arc<Mutex<HashMap<Uuid, ZoneReconcilerEntry>>>,
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zone_reconciler_notify: Sender<Uuid>,
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zone_reconcile_lock: Arc<RwLock<()>>,
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}
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impl ZoneReconciler {
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#[allow(clippy::too_many_arguments)]
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pub fn new(
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devices: DaemonDeviceManager,
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zlt: ZoneLookupTable,
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zones: ZoneStore,
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events: DaemonEventContext,
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runtime: Runtime,
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packer: OciPackerService,
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zone_reconciler_notify: Sender<Uuid>,
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kernel_path: PathBuf,
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initrd_path: PathBuf,
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modules_path: PathBuf,
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) -> Result<Self> {
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Ok(Self {
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devices,
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zlt,
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zones,
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events,
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runtime,
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packer,
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kernel_path,
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initrd_path,
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addons_path: modules_path,
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tasks: Arc::new(Mutex::new(HashMap::new())),
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zone_reconciler_notify,
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zone_reconcile_lock: Arc::new(RwLock::with_max_readers((), PARALLEL_LIMIT)),
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})
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}
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pub async fn launch(self, mut notify: Receiver<Uuid>) -> Result<JoinHandle<()>> {
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Ok(tokio::task::spawn(async move {
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if let Err(error) = self.reconcile_runtime(true).await {
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error!("runtime reconciler failed: {}", error);
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}
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loop {
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select! {
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x = notify.recv() => match x {
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None => {
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break;
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},
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Some(uuid) => {
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if let Err(error) = self.launch_task_if_needed(uuid).await {
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error!("failed to start zone reconciler task {}: {}", uuid, error);
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}
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let map = self.tasks.lock().await;
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if let Some(entry) = map.get(&uuid) {
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if let Err(error) = entry.sender.send(()).await {
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error!("failed to notify zone reconciler task {}: {}", uuid, error);
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}
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}
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}
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},
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_ = sleep(Duration::from_secs(15)) => {
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if let Err(error) = self.reconcile_runtime(false).await {
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error!("runtime reconciler failed: {}", error);
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}
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}
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};
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}
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}))
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}
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pub async fn reconcile_runtime(&self, initial: bool) -> Result<()> {
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let _permit = self.zone_reconcile_lock.write().await;
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trace!("reconciling runtime");
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let runtime_zones = self.runtime.list().await?;
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let stored_zones = self.zones.list().await?;
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let non_existent_zones = runtime_zones
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.iter()
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.filter(|x| !stored_zones.iter().any(|g| *g.0 == x.uuid))
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.collect::<Vec<_>>();
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for zone in non_existent_zones {
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warn!("destroying unknown runtime zone {}", zone.uuid);
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if let Err(error) = self.runtime.destroy(zone.uuid).await {
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error!(
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"failed to destroy unknown runtime zone {}: {}",
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zone.uuid, error
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);
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}
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self.zones.remove(zone.uuid).await?;
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}
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let mut device_claims = HashMap::new();
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for (uuid, mut stored_zone) in stored_zones {
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let previous_zone = stored_zone.clone();
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let runtime_zone = runtime_zones.iter().find(|x| x.uuid == uuid);
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match runtime_zone {
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None => {
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let mut state = stored_zone.state.as_mut().cloned().unwrap_or_default();
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if state.status() == ZoneStatus::Started {
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state.status = ZoneStatus::Starting.into();
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}
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stored_zone.state = Some(state);
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}
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Some(runtime) => {
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self.zlt.associate(uuid, runtime.domid).await;
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let mut state = stored_zone.state.as_mut().cloned().unwrap_or_default();
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if let Some(code) = runtime.state.exit_code {
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state.status = ZoneStatus::Exited.into();
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state.exit_info = Some(ZoneExitInfo { code });
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} else {
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state.status = ZoneStatus::Started.into();
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}
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for device in &stored_zone
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.spec
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.as_ref()
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.cloned()
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.unwrap_or_default()
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.devices
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{
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device_claims.insert(device.name.clone(), uuid);
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}
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state.network = Some(zoneinfo_to_networkstate(runtime));
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stored_zone.state = Some(state);
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}
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}
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let changed = stored_zone != previous_zone;
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if changed || initial {
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self.zones.update(uuid, stored_zone).await?;
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let _ = self.zone_reconciler_notify.try_send(uuid);
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}
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}
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self.devices.update_claims(device_claims).await?;
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Ok(())
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}
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pub async fn reconcile(&self, uuid: Uuid) -> Result<bool> {
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let _runtime_reconcile_permit = self.zone_reconcile_lock.read().await;
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let Some(mut zone) = self.zones.read(uuid).await? else {
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warn!(
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"notified of reconcile for zone {} but it didn't exist",
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uuid
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);
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return Ok(false);
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};
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info!("reconciling zone {}", uuid);
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self.events
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.send(DaemonEvent::ZoneChanged(ZoneChangedEvent {
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zone: Some(zone.clone()),
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}))?;
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let start_status = zone.state.as_ref().map(|x| x.status()).unwrap_or_default();
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let result = match start_status {
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ZoneStatus::Starting => self.start(uuid, &mut zone).await,
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ZoneStatus::Exited => self.exited(&mut zone).await,
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ZoneStatus::Destroying => self.destroy(uuid, &mut zone).await,
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_ => Ok(ZoneReconcilerResult::Unchanged),
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};
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let result = match result {
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Ok(result) => result,
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Err(error) => {
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zone.state = Some(zone.state.as_mut().cloned().unwrap_or_default());
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zone.state.as_mut().unwrap().status = ZoneStatus::Failed.into();
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zone.state.as_mut().unwrap().error_info = Some(ZoneErrorInfo {
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message: error.to_string(),
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});
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warn!("failed to start zone {}: {}", zone.id, error);
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ZoneReconcilerResult::Changed { rerun: false }
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}
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};
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info!("reconciled zone {}", uuid);
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let status = zone.state.as_ref().map(|x| x.status()).unwrap_or_default();
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let destroyed = status == ZoneStatus::Destroyed;
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let rerun = if let ZoneReconcilerResult::Changed { rerun } = result {
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let event = DaemonEvent::ZoneChanged(ZoneChangedEvent {
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zone: Some(zone.clone()),
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});
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if destroyed {
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self.zones.remove(uuid).await?;
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let mut map = self.tasks.lock().await;
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map.remove(&uuid);
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} else {
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self.zones.update(uuid, zone.clone()).await?;
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}
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self.events.send(event)?;
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rerun
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} else {
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false
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};
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Ok(rerun)
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}
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async fn start(&self, uuid: Uuid, zone: &mut Zone) -> Result<ZoneReconcilerResult> {
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let starter = ZoneStarter {
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devices: &self.devices,
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kernel_path: &self.kernel_path,
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initrd_path: &self.initrd_path,
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addons_path: &self.addons_path,
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packer: &self.packer,
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glt: &self.zlt,
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runtime: &self.runtime,
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};
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starter.start(uuid, zone).await
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}
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async fn exited(&self, zone: &mut Zone) -> Result<ZoneReconcilerResult> {
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if let Some(ref mut state) = zone.state {
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state.set_status(ZoneStatus::Destroying);
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Ok(ZoneReconcilerResult::Changed { rerun: true })
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} else {
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Ok(ZoneReconcilerResult::Unchanged)
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}
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}
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async fn destroy(&self, uuid: Uuid, zone: &mut Zone) -> Result<ZoneReconcilerResult> {
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if let Err(error) = self.runtime.destroy(uuid).await {
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trace!("failed to destroy runtime zone {}: {}", uuid, error);
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}
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let domid = zone.state.as_ref().map(|x| x.domid);
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if let Some(domid) = domid {
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self.zlt.remove(uuid, domid).await;
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}
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info!("destroyed zone {}", uuid);
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zone.state = Some(ZoneState {
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status: ZoneStatus::Destroyed.into(),
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network: None,
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exit_info: None,
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error_info: None,
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host: self.zlt.host_uuid().to_string(),
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domid: domid.unwrap_or(u32::MAX),
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});
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self.devices.release_all(uuid).await?;
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Ok(ZoneReconcilerResult::Changed { rerun: false })
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}
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async fn launch_task_if_needed(&self, uuid: Uuid) -> Result<()> {
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let mut map = self.tasks.lock().await;
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match map.entry(uuid) {
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Entry::Occupied(_) => {}
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Entry::Vacant(entry) => {
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entry.insert(self.launch_task(uuid).await?);
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}
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}
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Ok(())
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}
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async fn launch_task(&self, uuid: Uuid) -> Result<ZoneReconcilerEntry> {
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let this = self.clone();
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let (sender, mut receiver) = channel(10);
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let task = tokio::task::spawn(async move {
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'notify_loop: loop {
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if receiver.recv().await.is_none() {
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break 'notify_loop;
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}
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'rerun_loop: loop {
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let rerun = match this.reconcile(uuid).await {
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Ok(rerun) => rerun,
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Err(error) => {
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error!("failed to reconcile zone {}: {}", uuid, error);
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false
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}
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};
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if rerun {
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continue 'rerun_loop;
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}
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break 'rerun_loop;
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}
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}
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});
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Ok(ZoneReconcilerEntry { task, sender })
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}
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}
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pub fn zoneinfo_to_networkstate(info: &ZoneInfo) -> ZoneNetworkState {
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ZoneNetworkState {
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zone_ipv4: info.zone_ipv4.map(|x| x.to_string()).unwrap_or_default(),
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zone_ipv6: info.zone_ipv6.map(|x| x.to_string()).unwrap_or_default(),
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zone_mac: info.zone_mac.as_ref().cloned().unwrap_or_default(),
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gateway_ipv4: info.gateway_ipv4.map(|x| x.to_string()).unwrap_or_default(),
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gateway_ipv6: info.gateway_ipv6.map(|x| x.to_string()).unwrap_or_default(),
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gateway_mac: info.gateway_mac.as_ref().cloned().unwrap_or_default(),
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}
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}
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