lizhimins opened a new pull request, #2838:
URL: https://github.com/apache/rocketmq-dashboard/pull/2838
## Problem
- The metrics explorer defaulted to the first profile returned by
`MetricProfileService.listProfiles()`, which was the 4.x exporter template.
Deployments exposing 5.x native metrics showed "no data" for every default
panel.
- The cluster health overview only queried the single statically configured
name server, so registered open-source instances were missing from the
dashboard.
- The explorer could only show one metric at a time and had no ad-hoc query
entry.
## Changes
**Backend**
- Add `studio.metrics.prometheus.profile` (`PrometheusProperties`, default
`rocketmq5-native`); `listProfiles()` puts the configured default profile first.
- Fix the 5.x lag-latency mapping to the unit-suffixed metric name
`rocketmq_consumer_lag_latency_milliseconds` (OTel Prometheus export appends
units).
- Broker Health now reports node online state (`min(up{...})`) instead of
processor watermarks, which are constantly 0 on healthy low-traffic clusters;
watermark aggregation switched to `by (cluster, node_id)` to avoid series
explosion.
- Add Topic Count / Consumer Group Count panels (5.x template 7 -> 9), using
`max(...) by (cluster)` since counters are cluster-level values reported by
every broker.
- `RocketMQDashboardProvider` overview now aggregates all registered
APACHE-vendor instances; unreachable instances contribute a warning row instead
of failing the page; falls back to the static name server when no instance is
registered.
**Frontend**
- `MetricsExplorer` queries all metrics of the selected profile concurrently
in a responsive grid (one panel per metric), plus a custom PromQL query panel.
- Selected profile persisted to localStorage; charts cap legends at top-10
series by latest value; axis label/line sizing tuned for small panels.
## Tests
- `MetricProfileServiceTest` (12), `RocketMQDashboardProviderTest` (28),
`MetricsExplorer.test.tsx` (19) all green; full frontend suite 737 green; `tsc
--noEmit` and `npm run build` pass.
- Verified against a live 5.x deployment: default profile first, real data
on all panels, 24 topics / 15 groups counted.
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