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feat(#2349): fan reconcile's start/stop out as first-class dag nodes

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damocles 2026-07-11 23:33:45 +02:00 • committed by mara
commit 79d4c345bb
4 changed files with 156 additions and 63 deletions
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19
hive-c0re/src/job_queue/model.rs
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@ -90,10 +90,21 @@ pub enum NodeKind {
sweep: bool,
fanout: Option<Vec<String>>,
},
/// Idempotent power converge: read `wanted` + observed state;
/// start if `Up` & down (with cold-start fallback), stop if
/// `Offline` & up, else noop.
/// Idempotent power converge *planner*: read `wanted` + observed
/// state and decide the action (start if `Up` & down, stop if
/// `Offline` & up, else noop). The mechanical work is not done in
/// this node — it fans a child [`NodeKind::Start`] / [`NodeKind::Stop`]
/// DAG out at runtime so the sub-step is a first-class DAG node.
Reconcile,
/// Mechanical container start: the start preamble (runtime dir +
/// drop-ins), `start_with_fallback`, MCP listener registration, and
/// the manager kick. Fanned out by a [`NodeKind::Reconcile`] that
/// observed `wanted = Up` and the container down.
Start,
/// Mechanical container stop: `nixos-container` kill, MCP listener
/// unregister, and the `Killed` manager notify. Fanned out by a
/// [`NodeKind::Reconcile`] that observed `wanted = Offline` and up.
Stop,
/// Mechanical `nixos-container stop` for the profile swap. Never
/// touches `wanted`. Noop if already stopped.
StopForUpdate,
@ -125,6 +136,8 @@ impl NodeKind {
NodeKind::Create => "create",
NodeKind::MetaLock { .. } => "meta_lock",
NodeKind::Reconcile => "reconcile",
NodeKind::Start => "start",
NodeKind::Stop => "stop",
NodeKind::StopForUpdate => "stop_for_update",
NodeKind::Signal => "signal",
NodeKind::Drain => "drain",