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meshcore-analyzer/cmd
Kpa-clawbot 65bd954b17 feat(config): make observer health thresholds configurable (closes #1552) (#1556)
Closes #1552.

## What

Make observer `Online` / `Stale` / `Offline` thresholds
operator-configurable via `config.json`'s existing `healthThresholds`
block — and **raise the defaults** from 10 min / 60 min to **60 min /
1440 min (1 h / 24 h)** so they match the node thresholds and stop
producing flap out of the box.

⚠️ **This is a default behavior change.** Operators who want the old
aggressive 10-min Online threshold must opt in via:

```json
"healthThresholds": { "observerOnlineMinutes": 10 }
```

## Why

Per #1552: the `600000` / `3600000` constants in `public/observers.js`
were not tunable, *and* 10 min is wrong as a default. Wide-geo,
low-traffic meshes legitimately see observers go quiet for >10 min
between reports, and operators behind a CDN (#1551) get cached
`last_seen` values that can push the observer 15+ min behind reality —
guaranteeing flap at the 10-min threshold. The meshat.se operator (43
observers, v3.8.3) reports exactly this pattern.

Defaults raised from 10 / 60 minutes to 60 / 1440 minutes (1 h / 24 h)
to match the node thresholds for consistency and eliminate flap on
low-traffic / CDN-fronted instances. Operators wanting the old 10-min
Online behavior can set `observerOnlineMinutes: 10` in config.

## Changes

Backend (`cmd/server/config.go`):
- `HealthThresholds` gains `ObserverOnlineMinutes` /
`ObserverStaleMinutes` (int).
- `GetHealthThresholds()` defaults to **60 / 1440** when zero/absent.
- `ToClientMs()` emits `observerOnlineMs` / `observerStaleMs`, picked up
by the existing `/api/config-public` → `roles.js`
`Object.assign(HEALTH_THRESHOLDS, …)` pipeline.

`config.example.json`: new `observerOnlineMinutes` /
`observerStaleMinutes` keys (60 / 1440) + `_comment_observerThresholds`
explaining the rationale and opt-out.

Frontend:
- `public/observers.js` `healthStatus()` — reads from
`window.HEALTH_THRESHOLDS.observerOnlineMs / observerStaleMs`, falls
back to **3600000 / 86400000** (matching the new Go defaults for the
pre-`/api/config-public` window).
- `public/observer-detail.js` — same refactor (was previously hardcoded
`600000` + misusing `nodeDegradedMs` for the Stale boundary).

## Backward compat

- API shape: unchanged — only adds two optional keys.
- Config: unchanged keys / no renames.
- Default behavior: **changed** — operators relying on the implicit
10/60 must opt in (one config line).

## TDD

- RED 1 (`ee19058f`): assertions on the new fields + `ToClientMs` keys +
`healthStatus` reading from `window.HEALTH_THRESHOLDS`. CI:
[failure](https://github.com/Kpa-clawbot/CoreScope/actions/runs/26945264822).
- GREEN 1 (`30cfbf7a`): configurability landed (defaults still old
10/60). CI:
[success](https://github.com/Kpa-clawbot/CoreScope/actions/runs/26945220598).
- RED 2 (`2649cf35`): pin new 60/1440 defaults — empty-config Go path +
JS `healthStatus` with no `HEALTH_THRESHOLDS`. CI must fail.
- GREEN 2 (`5ef85bca`): bump Go defaults to 60/1440, JS fallbacks to
3600000/86400000, `config.example.json` updated. CI must pass.

## Preflight

Clean (exit 0). `cross-stack` ack in commit messages — single feature
spans Go + JSON + JS readers.

## Not in scope

- Customizer UI for editing the thresholds (config-only per issue).
- Node/infra thresholds (unchanged).
- The deeper observer-flap root cause (#1551 cache-control is a separate
PR in flight).

---------

Co-authored-by: corescope-bot <bot@corescope>
Co-authored-by: mc-bot <bot@meshcore.local>
2026-06-04 03:56:48 -07:00
..