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cortex/crates/neuron/tests/activation.rs
rob thijssen 800498f530
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feat(neuron): bind listener before pre-warm, surface activation in /health
Two coupled changes addressing the 2026-05-26 validate-neuron failure
where a fresh deploy of beast had /health unreachable for ~5 minutes
while Qwen3.6-27B q5k materialised, even though systemd reported the
unit as active.

1. main.rs no longer awaits load_default_models before binding axum.
   The listener binds first; pre-warm runs in a spawned background
   task that holds a read lock on the harness registry for the
   duration of its sequential load loop. Concurrent on-demand
   /models/load and /v1/chat/completions traffic still flow.

2. /health gains an `activation` field carrying:
     state         pre_warming | ready
     pending       model ids queued but not started
     in_progress   model id currently loading (Option)
     completed     model ids loaded successfully this activation
     failed        [{model_id, error}] for failed entries
   The field is `#[serde(default)]` so a pre-change cortex polling a
   new neuron — or vice versa — keeps working.

`ActivationTracker` (new module `neuron::activation`) owns the
RwLock-wrapped state; load_default_models takes a tracker reference
and updates it per-model. NeuronState holds an Arc clone for the
/health handler.

Tests updated to construct trackers and assert state transitions
(empty noop, two failures → ready with both in `failed`).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-26 15:18:04 +03:00

78 lines
2.5 KiB
Rust

//! Activation-time behaviour: load_default_models continues past
//! individual failures so a single broken catalogue entry doesn't
//! prevent the rest of the fleet from starting.
use cortex_core::discovery::ActivationState;
use cortex_core::harness::{HarnessConfig, ModelSpec};
use neuron::activation::ActivationTracker;
use neuron::config::HarnessSettings;
use neuron::harness::HarnessRegistry;
use neuron::startup;
#[tokio::test]
async fn test_load_default_models_skips_unknown_harness() {
let registry = HarnessRegistry::from_configs(
&[HarnessConfig {
name: "candle".into(),
}],
"http://localhost:0",
&HarnessSettings::default(),
);
// Both entries fail synchronously inside the registry — no network
// call escapes (the harness lookup mismatches before hf-hub is
// touched). The function should still return cleanly.
let specs = vec![
ModelSpec {
model_id: "model-a".into(),
harness: "no-such-harness".into(),
quant: None,
tensor_parallel: None,
devices: None,
},
ModelSpec {
model_id: "model-b".into(),
harness: "no-such-harness".into(),
quant: None,
tensor_parallel: None,
devices: None,
},
];
let activation = ActivationTracker::new(&specs);
startup::load_default_models(&registry, &specs, &activation).await;
let listed = registry
.list_all_models()
.await
.expect("list_all_models should succeed");
assert!(
listed.is_empty(),
"no models should be loaded after failed entries"
);
// Both specs should land in `failed`; tracker should flip to ready.
let snapshot = activation.snapshot().await;
assert_eq!(snapshot.state, ActivationState::Ready);
assert!(snapshot.pending.is_empty());
assert!(snapshot.in_progress.is_none());
assert!(snapshot.completed.is_empty());
assert_eq!(snapshot.failed.len(), 2);
let failed_ids: Vec<&str> = snapshot
.failed
.iter()
.map(|f| f.model_id.as_str())
.collect();
assert!(failed_ids.contains(&"model-a"));
assert!(failed_ids.contains(&"model-b"));
}
#[tokio::test]
async fn test_load_default_models_empty_is_noop() {
let registry = HarnessRegistry::new();
let activation = ActivationTracker::new(&[]);
startup::load_default_models(&registry, &[], &activation).await;
let snapshot = activation.snapshot().await;
assert_eq!(snapshot.state, ActivationState::Ready);
}