# Grafana datasource provisioning: wires Prometheus and Tempo in automatically
# at boot. Mounted at /etc/grafana/provisioning/datasources by the
# `observability` profile.
apiVersion: 1

datasources:
  - name: Prometheus
    type: prometheus
    access: proxy
    # Fixed uid so the dashboard's ${DS_PROMETHEUS} variable resolves to it.
    uid: prometheus
    # "prometheus" is the Compose service name on the shared network.
    url: http://prometheus:9090
    isDefault: true
    editable: true
    jsonData:
      httpMethod: POST
      # Match prometheus.yml scrape_interval so $__rate_interval is computed well.
      timeInterval: 15s

  - name: Tempo
    type: tempo
    access: proxy
    uid: tempo
    # "tempo" is the Compose service name; 3200 is its query API.
    url: http://tempo-query-frontend:3200
    editable: true
    jsonData:
      httpMethod: GET
      # Trace -> metrics. From a span in Tempo, jump to the RED metrics the
      # collector derived from it. The model tag maps to the BOUNDED label
      # (frosty.metrics.model), because that is what spanmetrics promotes -
      # mapping gen_ai.request.model here would query a label that never exists.
      tracesToMetrics:
        datasourceUid: prometheus
        spanStartTimeShift: -5m
        spanEndTimeShift: 5m
        tags:
          - key: service.name
            value: service_name
          - key: frosty.metrics.model
            value: frosty_metrics_model
        queries:
          - name: Span rate
            query: sum(rate(traces_span_metrics_calls_total{$$__tags}[$$__rate_interval]))
          - name: Span p95 duration
            query: histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{$$__tags}[$$__rate_interval])))
      # Service-graph data is not generated (the collector owns metrics and
      # Tempo's metrics_generator is off), so leave the node graph disabled
      # rather than pointing it at a datasource with nothing to show.
      nodeGraph:
        enabled: false
      search:
        hide: false
      traceQuery:
        timeShiftEnabled: true
        spanStartTimeShift: -5m
        spanEndTimeShift: 5m