Tempo's metrics-generator defaults the exemplar label to traceID, which
the Prometheus datasource's exemplarTraceIdDestinations (trace_id) never
matched: exemplars rendered in Grafana but didn't link to Tempo. Set
trace_id_label_name in the overrides so trace_id is the one correlation
key everywhere.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
k8s/ is now a faithful port of the mentor's Ansible Grafana stack
(Prometheus, Alertmanager, Loki, Tempo, Alloy, Grafana, node-exporter)
for the ledgerline-observability namespace on falken: same versions and
configs, one *.vione.cloud ingress per tool behind Traefik basic auth,
secrets generated by create-secrets.sh into gitignored files.
Two fixes over the Ansible role, both verified live: Tempo's
metrics-generator needs traces_storage or it runs no processors, and
Prometheus needs exemplar-storage to keep exemplars.
Ledgerline stays on czy; an Alloy agent in the Traefik override ships
its container logs to Loki. Roadmap and CLAUDE.md now point at k8s/.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Movses AslanyanandClaude Opus 5.5