514 lines
22 KiB
Rust
514 lines
22 KiB
Rust
//! Node executors — one async fn per [`NodeKind`], each a thin wrapper
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//! over existing `lifecycle.rs` / `meta.rs` / `actions.rs` code. Node
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//! executors keep their own internal error handling where it exists
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//! today (cold-start fallback inside `Reconcile`, non-fatal boot-time
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//! lock bump inside the sweep `MetaLock`, warn-only forge sync in the
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//! `Swap` tail); DAG-level failure handling is cancel-downstream in
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//! the queue.
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use std::sync::Arc;
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use anyhow::{Context as _, Result};
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use super::model::{NodeKind, State, Template};
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use super::{Claim, TerminalDag};
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use crate::coordinator::Coordinator;
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use crate::power::{ReconcileAction, reconcile_action};
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/// Max time `Drain` waits for the harness to run its stop-checkpoint
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/// turn before falling back to the hard stop. Generous — a checkpoint
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/// turn can take a while — but bounded so a wedged agent never blocks
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/// the stop indefinitely. Drains hold no build slot, so a whole-hive
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/// graceful stop overlaps every agent's drain instead of serialising
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/// N × this timeout.
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pub const GRACEFUL_STOP_TIMEOUT: std::time::Duration = std::time::Duration::from_mins(3);
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/// Extra signal an executor hands back to the scheduler alongside
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/// success.
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#[derive(Debug, Default)]
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pub struct NodeOutput {
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/// Agents to fan child `Rebuild` DAGs out for (`MetaLock` only).
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pub fanout: Vec<String>,
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}
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/// Step-label + build-log sink for one claimed node.
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struct Ctx<'a> {
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coord: &'a Arc<Coordinator>,
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dag_id: u64,
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node_id: super::NodeId,
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}
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impl Ctx<'_> {
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fn step(&self, step: &str) {
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if self
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.coord
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.job_queue
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.set_step(self.dag_id, self.node_id, step)
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{
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self.coord.emit_rebuild_queue_snapshot();
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}
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}
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fn build_log(&self, log_id: i64) {
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if self
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.coord
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.job_queue
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.set_build_log_id(self.dag_id, self.node_id, log_id)
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{
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self.coord.emit_rebuild_queue_snapshot();
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}
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}
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}
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/// Run one claimed node to completion. Called from a task the
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/// scheduler spawns per claim; the `Result` (stringified) becomes the
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/// node's terminal state.
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pub(super) async fn run_node(coord: &Arc<Coordinator>, claim: &Claim) -> Result<NodeOutput> {
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let ctx = Ctx {
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coord,
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dag_id: claim.dag_id,
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node_id: claim.node_id,
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};
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match &claim.kind {
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NodeKind::Prebuild { relock } => run_prebuild(coord, claim, &ctx, *relock).await,
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NodeKind::Swap => run_swap(coord, claim, &ctx).await,
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NodeKind::Create => run_create(coord, claim, &ctx).await,
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NodeKind::MetaLock { sweep, fanout } => {
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run_meta_lock(coord, claim, &ctx, *sweep, fanout.clone()).await
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}
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NodeKind::Reconcile => run_reconcile(coord, claim, &ctx).await,
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NodeKind::StopForUpdate => run_stop_for_update(coord, claim, &ctx).await,
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NodeKind::Signal => Ok(run_signal(coord, claim, &ctx)),
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NodeKind::Drain => run_drain(coord, claim, &ctx).await,
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NodeKind::WriteDropin => run_write_dropin(coord, claim).await,
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NodeKind::WritePermFile => run_write_perm_file(coord, claim, &ctx).await,
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NodeKind::ApprovalDeploy => run_approval_deploy(coord, claim).await,
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}
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}
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/// Out-of-band toplevel build while the container keeps serving: meta
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/// sync + optional per-agent relock, then warm
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/// `system.build.toplevel` so the later `Swap` hits cache and skips
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/// straight to the profile-swap.
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async fn run_prebuild(
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coord: &Arc<Coordinator>,
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claim: &Claim,
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ctx: &Ctx<'_>,
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relock: bool,
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) -> Result<NodeOutput> {
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let name = &claim.agent;
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// Prebuild runs while the agent is still up — the runtime dir and
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// MCP listener already exist. Use the pure path accessor; no need
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// to re-register the listener (event-driven: registered at start/create).
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let agent_dir = Coordinator::agent_dir(name);
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let hive = coord.hive_env();
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let paths = Coordinator::agent_paths(name, agent_dir);
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crate::lifecycle::prepare_rebuild_dirs(name, &paths).await?;
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// Idempotent meta sync so a manual rebuild can also recover from a
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// divergent meta repo; then bump just this agent's input. `relock =
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// false` only for meta-update cascade children, where re-locking
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// would revert the bump the cascade just committed. Both run under
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// the deploy-window gate so they can never land inside another
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// node's staged prepare→finalize window; the gate drops before the
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// (long) toplevel build, which only reads the store.
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{
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let _window = crate::meta::exclusive().await;
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let agents = crate::lifecycle::agents_for_meta_listing().await?;
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crate::meta::sync_agents(&hive, &agents).await?;
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if relock {
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crate::meta::lock_update_for_rebuild(name).await?;
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}
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}
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ctx.step("nix build");
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let flake_ref = format!("{}#{name}", crate::meta::meta_dir().display());
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crate::lifecycle::prebuild_toplevel(name, &flake_ref, &|log_id| ctx.build_log(log_id)).await?;
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Ok(NodeOutput::default())
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}
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/// Profile-swap: re-apply drop-ins (rebuild is the reconcile verb),
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/// `nixos-container update`, then the post-rebuild bookkeeping tail
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/// (rev marker, `Rebuilt` event, forge/matrix sync, kick, rescan).
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/// The recovery-start on failure is NOT here — the DAG's tail
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/// `Reconcile` runs after this node terminal ok *or* fail.
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async fn run_swap(coord: &Arc<Coordinator>, claim: &Claim, ctx: &Ctx<'_>) -> Result<NodeOutput> {
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let name = &claim.agent;
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// Swap runs on an already-existing (stopped) container — runtime dir
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// and listener were created earlier. Pure path accessor suffices.
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let agent_dir = Coordinator::agent_dir(name);
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let hive = coord.hive_env();
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let paths = Coordinator::agent_paths(name, agent_dir);
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let result =
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crate::lifecycle::swap_update(name, &hive, &paths, &|step| ctx.step(step), &|log_id| {
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ctx.build_log(log_id);
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})
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.await;
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match &result {
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Ok(()) => {
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if let Some(rev) = crate::auto_update::current_flake_rev(&coord.hyperhive_flake)
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&& let Err(e) = std::fs::write(crate::auto_update::rev_marker_path(name), rev)
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{
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tracing::warn!(%name, error = ?e, "write rev marker failed");
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}
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// The `Rebuilt` manager event fires exactly once per DAG
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// from the terminal hook — emitting ok here and letting a
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// failed tail `Reconcile` add a contradictory !ok would
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// double-report the same rebuild.
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ctx.step("forge sync");
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// Full forge + matrix sync on every successful rebuild so
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// the rebuild path is equivalent to the startup sweep:
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// tokens, config-repo mirror, meta access all recover
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// without a hive-c0re restart.
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crate::forge::sync_agent(name, crate::forge::core_token().as_deref()).await;
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crate::matrix::sync_agent_standalone(name).await;
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// Wake the agent on its next turn so claude sees a "you
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// were rebuilt" hint; rescan so dashboards drop the
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// "needs update" chip; lock bump → meta-inputs re-render.
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coord.kick_agent(name, "container rebuilt");
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coord.rescan_containers_and_emit().await;
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crate::dashboard::emit_meta_inputs_snapshot(coord);
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}
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Err(_) => {
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// The `Rebuilt { ok: false }` manager event fires once per
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// DAG from the terminal hook (any node may be the one that
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// failed); here only refresh the observed state.
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coord.rescan_containers_and_emit().await;
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}
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}
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result.map(|()| NodeOutput::default())
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}
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/// First-spawn provisioning + `nixos-container create` (atomic
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/// build+create — no prebuild needed).
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async fn run_create(coord: &Arc<Coordinator>, claim: &Claim, ctx: &Ctx<'_>) -> Result<NodeOutput> {
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let name = &claim.agent;
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let agent_dir = Coordinator::agent_dir(name);
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let hive = coord.hive_env();
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let paths = Coordinator::agent_paths(name, agent_dir);
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ctx.step("nixos-container create");
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// create_container registers the new agent in the meta flake
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// (sync_agents commit) before `nixos-container create` — hold the
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// deploy-window gate so that commit can't land inside another
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// node's staged deploy window.
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// Runtime dir creation and MCP listener registration are deferred to
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// the tail Reconcile (converge_start_preamble + register_agent) so this
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// node stays purely "provision + create", not "create + start".
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let _window = crate::meta::exclusive().await;
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crate::lifecycle::create_container(name, &hive, &paths).await?;
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Ok(NodeOutput::default())
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}
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/// Meta flake lock bump. Boot-sweep flavour is non-fatal (a failed
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/// bump must not cancel the fan-out rebuilds — they proceed against
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/// the current lock, exactly like today's sweep); the meta-update
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/// flavour propagates errors, and a failed bump fans out nothing.
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async fn run_meta_lock(
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coord: &Arc<Coordinator>,
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claim: &Claim,
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ctx: &Ctx<'_>,
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sweep: bool,
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fanout: Option<Vec<String>>,
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) -> Result<NodeOutput> {
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if sweep {
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ctx.step("nix flake update hyperhive");
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let _window = crate::meta::exclusive().await;
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if let Err(e) = crate::meta::lock_update_hyperhive().await {
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tracing::warn!(error = ?e, "startup sweep: meta lock_update_hyperhive failed");
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}
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return Ok(NodeOutput {
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fanout: fanout.unwrap_or_default(),
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});
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}
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let _progress = coord.meta_update_guard();
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ctx.step("nix flake update");
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{
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let _window = crate::meta::exclusive().await;
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crate::meta::lock_update(&claim.inputs).await?;
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}
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// Lock file changed — meta-inputs panel re-renders.
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crate::dashboard::emit_meta_inputs_snapshot(coord);
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let cascade = match fanout {
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Some(list) => list,
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None => meta_update_cascade_agents(&claim.inputs).await,
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};
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Ok(NodeOutput { fanout: cascade })
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}
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/// Idempotent power converge: `wanted` (durable intent) vs observed.
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async fn run_reconcile(
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coord: &Arc<Coordinator>,
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claim: &Claim,
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ctx: &Ctx<'_>,
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) -> Result<NodeOutput> {
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let name = &claim.agent;
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let running = crate::lifecycle::is_running(name).await;
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let wanted = coord.power.get_or_seed(name, running)?;
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match reconcile_action(wanted, running) {
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ReconcileAction::Start => {
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// Node-local transient only when the DAG holds none (the
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// boot-reconcile template); lease-window guards otherwise
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// already cover this node.
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let _guard = claim
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.transient
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.is_none()
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.then(|| coord.transient_guard(name, crate::coordinator::TransientKind::Starting));
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// Run the typed start preamble: ensures the runtime dir
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// exists and writes the nspawn/resource-limits drop-ins.
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// The returned StartableAgent token is the only way to call
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// start_with_fallback — omitting this becomes a compile error.
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let agent_dir = Coordinator::agent_dir(name);
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let hive = coord.hive_env();
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let paths = Coordinator::agent_paths(name, agent_dir);
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let token = crate::lifecycle::converge_start_preamble(name, &hive, &paths).await?;
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ctx.step("nixos-container start");
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crate::lifecycle::start_with_fallback(token).await?;
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// Bind the MCP listener immediately after starting the container.
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// The preamble created the runtime dir; the container is now
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// coming up and will connect to this socket on its first turn.
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// Event-driven (no background poll) — c0re owns the listener
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// lifecycle, so register here rather than waiting for a sweep.
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coord.register_agent(name)?;
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coord.kick_agent(name, "container started");
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coord.rescan_containers_and_emit().await;
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}
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ReconcileAction::Stop => {
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let _guard = claim
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.transient
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.is_none()
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.then(|| coord.transient_guard(name, crate::coordinator::TransientKind::Stopping));
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ctx.step("nixos-container stop");
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crate::lifecycle::kill(name).await?;
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coord.unregister_agent(name);
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coord.notify_manager(&hive_sh4re::HelperEvent::Killed {
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agent: name.clone(),
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});
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coord.rescan_containers_and_emit().await;
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}
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ReconcileAction::Noop => {
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tracing::debug!(%name, wanted = wanted.as_str(), running, "reconcile: noop");
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}
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}
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Ok(NodeOutput::default())
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}
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/// Mechanical stop for the profile swap. Never *changes* `wanted`;
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/// noop when already stopped.
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async fn run_stop_for_update(
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coord: &Arc<Coordinator>,
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claim: &Claim,
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ctx: &Ctx<'_>,
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) -> Result<NodeOutput> {
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let name = &claim.agent;
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if crate::lifecycle::is_running(name).await {
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// Seed a missing agent_power row from the PRE-stop observation
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// — the DAG's tail `Reconcile` observes only the mechanically
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// stopped state and would otherwise seed a running-but-unknown
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// agent as `Offline`, stranding it down after its own rebuild.
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if let Err(e) = coord.power.get_or_seed(name, true) {
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tracing::warn!(%name, error = ?e, "agent_power: pre-stop seed failed");
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}
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ctx.step("nixos-container stop");
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crate::lifecycle::kill(name).await?;
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coord.rescan_containers_and_emit().await;
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}
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Ok(NodeOutput::default())
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}
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/// Set the graceful fence + kick so the harness sees it promptly and
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/// runs its one stop-checkpoint turn.
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fn run_signal(coord: &Arc<Coordinator>, claim: &Claim, ctx: &Ctx<'_>) -> NodeOutput {
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ctx.step("graceful stop: signalling agent");
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coord.mark_graceful_stop(&claim.agent);
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coord.kick_agent(&claim.agent, "graceful stop requested");
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NodeOutput::default()
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}
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/// Await the harness clearing the fence (`GracefulStopComplete`) or
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/// the timeout — either way the downstream `Reconcile` proceeds with
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/// the actual stop.
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async fn run_drain(coord: &Arc<Coordinator>, claim: &Claim, ctx: &Ctx<'_>) -> Result<NodeOutput> {
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let name = &claim.agent;
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ctx.step("graceful stop: draining");
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let deadline = std::time::Instant::now() + GRACEFUL_STOP_TIMEOUT;
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while coord.is_graceful_stop_pending(name) {
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if std::time::Instant::now() >= deadline {
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tracing::warn!(agent = %name, "graceful stop: drain timed out — hard-stopping");
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break;
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}
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tokio::time::sleep(std::time::Duration::from_millis(500)).await;
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}
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coord.clear_graceful_stop(name);
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Ok(NodeOutput::default())
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}
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/// `set_nspawn_flags` + `set_resource_limits` + daemon-reload.
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async fn run_write_dropin(coord: &Arc<Coordinator>, claim: &Claim) -> Result<NodeOutput> {
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let name = &claim.agent;
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// write_dropins only needs the path value to build AgentPaths; the
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// dir doesn't need to exist at this point (created by ensure_agent_runtime_dir
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// on the upstream Prebuild/Start node).
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let agent_dir = Coordinator::agent_dir(name);
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let hive = coord.hive_env();
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let paths = Coordinator::agent_paths(name, agent_dir);
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crate::lifecycle::write_dropins(name, &hive, &paths).await?;
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Ok(NodeOutput::default())
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}
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/// Write + commit the perm file(s) (fused under `META_LOCK` so the
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/// working tree is never left dirty), then emit the P3RM1SS10NS-tab
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/// snapshots so the dashboard reflects the new assignment.
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async fn run_write_perm_file(
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coord: &Arc<Coordinator>,
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claim: &Claim,
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ctx: &Ctx<'_>,
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) -> Result<NodeOutput> {
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use super::model::PermPayload;
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let name = &claim.agent;
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ctx.step("writing + committing perm file");
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// Deploy-window gate: a perm commit landing inside another node's
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// staged prepare→finalize window would sweep the staged deploy
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// lock into its commit (the commits are also path-limited in
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// meta.rs — belt and braces).
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let _window = crate::meta::exclusive().await;
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match &claim.perm_payload {
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Some(PermPayload::ToolGroups { groups }) => {
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crate::meta::commit_tool_groups(name, groups)
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.await
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.with_context(|| format!("commit tool-groups for {name}"))?;
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coord.emit_tool_groups_snapshot();
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}
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Some(PermPayload::Capabilities { caps }) => {
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crate::meta::commit_capabilities(name, caps)
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.await
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.with_context(|| format!("commit capabilities for {name}"))?;
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coord.emit_capabilities_snapshot();
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}
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Some(PermPayload::Combined { groups, caps }) => {
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crate::meta::commit_perms(name, groups.as_deref(), caps.as_deref())
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.await
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.with_context(|| format!("commit perms for {name}"))?;
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if groups.is_some() {
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coord.emit_tool_groups_snapshot();
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}
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if caps.is_some() {
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coord.emit_capabilities_snapshot();
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}
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}
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None => anyhow::bail!(
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"perm_change dag {} for {name} is missing perm_payload",
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claim.dag_id
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),
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}
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Ok(NodeOutput::default())
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}
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/// Opaque approval deploy pipeline: `ApplyCommit` and `MergeConfigPr`
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/// both end in a container rebuild; branch on the approval row's kind
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/// (the authoritative source). The two-phase prepare/finalize/abort
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/// meta deploy — and the approval resolution — stay inside
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/// `actions.rs` in v1 (design doc §9).
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async fn run_approval_deploy(coord: &Arc<Coordinator>, claim: &Claim) -> Result<NodeOutput> {
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let approval_id = claim
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.approval_id
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.with_context(|| format!("approval_deploy dag {} has no approval_id", claim.dag_id))?;
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// Hold the deploy-window gate for the whole prepare→finalize span:
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// `prepare_deploy` stages `flake.lock` uncommitted for the entire
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// container build, and no other meta mutation may land inside that
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// window (it would sweep the staged lock and neuter `abort_deploy`).
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let _window = crate::meta::exclusive().await;
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let kind = coord
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.approvals
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.get(approval_id)
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.ok()
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.flatten()
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.map(|a| a.kind);
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let result = if kind == Some(hive_sh4re::ApprovalKind::MergeConfigPr) {
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crate::actions::run_approval_merge_config_pr(coord, Some(claim.dag_id), approval_id).await
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} else {
|
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crate::actions::run_approval_apply_commit(coord, Some(claim.dag_id), approval_id).await
|
||
};
|
||
result.map(|()| NodeOutput::default())
|
||
}
|
||
|
||
/// Terminal-roll-up hook, fired exactly once per DAG (node completion
|
||
/// and cancel paths alike — the queue buffers roll-ups and the
|
||
/// scheduler drains them). Three concerns:
|
||
/// - approval DAGs resolve their approval row (except the opaque
|
||
/// deploy pipeline, which resolves inside its node — unless it was
|
||
/// cancelled while still queued and the node never ran);
|
||
/// - non-approval rebuild-shaped DAGs emit exactly one `Rebuilt`
|
||
/// manager event: ok on `Done`, !ok on `Failed`, none on cancel;
|
||
/// - a cancelled power-op DAG reverts the `wanted` intent its submit
|
||
/// wrote: the operator's cancel means "don't do it", so intent
|
||
/// snaps back to the observed state instead of the flip executing
|
||
/// as a surprise side effect of some later reconcile.
|
||
pub(super) async fn on_dag_terminal(coord: &Arc<Coordinator>, terminal: &TerminalDag) {
|
||
if terminal.state == State::Cancelled
|
||
&& matches!(
|
||
terminal.template,
|
||
Template::Start | Template::Stop | Template::GracefulStop | Template::Restart
|
||
)
|
||
{
|
||
let running = crate::lifecycle::is_running(&terminal.agent).await;
|
||
if let Err(e) = coord
|
||
.power
|
||
.set(&terminal.agent, crate::power::Wanted::from_running(running))
|
||
{
|
||
tracing::warn!(agent = %terminal.agent, error = ?e, "agent_power: cancel revert failed");
|
||
}
|
||
}
|
||
if terminal.approval_id.is_some() {
|
||
crate::actions::resolve_approval_dag(coord, terminal).await;
|
||
return;
|
||
}
|
||
if matches!(terminal.template, Template::Rebuild | Template::PermChange) {
|
||
match terminal.state {
|
||
State::Done => coord.notify_manager(&hive_sh4re::HelperEvent::Rebuilt {
|
||
agent: terminal.agent.clone(),
|
||
ok: true,
|
||
note: None,
|
||
sha: None,
|
||
tag: None,
|
||
}),
|
||
State::Failed => coord.notify_manager(&hive_sh4re::HelperEvent::Rebuilt {
|
||
agent: terminal.agent.clone(),
|
||
ok: false,
|
||
note: terminal.error.clone(),
|
||
sha: None,
|
||
tag: None,
|
||
}),
|
||
_ => {}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Compute which agents a `nix flake update <inputs>` on the meta
|
||
/// flake affects — the fan-out set for `MetaUpdate` DAGs. Empty
|
||
/// `inputs` or any input under `hyperhive` → every container;
|
||
/// otherwise just the agents named by `agent-<name>` inputs.
|
||
/// Topology-sorted so parents rebuild before their children.
|
||
pub async fn meta_update_cascade_agents(inputs: &[String]) -> Vec<String> {
|
||
let touched_hyperhive = inputs
|
||
.iter()
|
||
.any(|i| i == "hyperhive" || i.starts_with("hyperhive/"));
|
||
let touched_agents: Vec<String> = inputs
|
||
.iter()
|
||
.filter_map(|i| i.strip_prefix("agent-"))
|
||
.map(|rest| rest.split('/').next().unwrap_or(rest).to_owned())
|
||
.collect();
|
||
let mut names = if touched_hyperhive || inputs.is_empty() {
|
||
crate::lifecycle::list()
|
||
.await
|
||
.unwrap_or_default()
|
||
.into_iter()
|
||
.filter_map(|c| {
|
||
c.strip_prefix(crate::lifecycle::AGENT_PREFIX)
|
||
.map(str::to_owned)
|
||
})
|
||
.collect()
|
||
} else {
|
||
touched_agents
|
||
};
|
||
let topo = crate::topology::read();
|
||
crate::auto_update::topology_sort(&mut names, &topo);
|
||
names
|
||
}
|