exercises

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datasources.yml (1823B)

      1 # Grafana datasource provisioning
      2 # Auto-configures Prometheus, Tempo, and Loki datasources on startup
      3 
      4 apiVersion: 1
      5 
      6 datasources:
      7   # Prometheus — metrics backend
      8   - name: prometheus
      9     type: prometheus
     10     uid: prometheus
     11     access: proxy
     12     url: http://prometheus:9090
     13     isDefault: true
     14     jsonData:
     15       timeInterval: 60s   # matches the OTel PeriodicReader export interval
     16       exemplarTraceIdDestinations:
     17         - name: trace_id
     18           datasourceUid: tempo
     19 
     20   # Loki — log aggregation backend (provisioned before Jaeger so tracesToLogsV2 can reference its UID)
     21   - name: Loki
     22     type: loki
     23     access: proxy
     24     url: http://loki:3100
     25     uid: loki
     26     editable: true
     27     jsonData:
     28       derivedFields:
     29         # Logs → Traces: turn the `trace_id` structured-metadata field on every
     30         # log record into a clickable link that opens the matching trace in
     31         # Jaeger. Without this, the trace_id column in Loki Explore is plain
     32         # text and the chapter's "click trace_id to jump to Jaeger" workflow
     33         # silently doesn't work.
     34         - name: TraceID
     35           matcherType: label
     36           matcherRegex: trace_id
     37           datasourceUid: jaeger
     38           url: '$${__value.raw}'
     39           urlDisplayLabel: 'View Trace'
     40 
     41   # Tempo — distributed tracing backend (after Loki so its UID is available)
     42   - name: tempo
     43     type: tempo
     44     uid: tempo
     45     access: proxy
     46     url: http://tempo:3200
     47     editable: true
     48     jsonData:
     49       tracesToLogsV2:
     50         # Link from trace spans to Loki logs using trace_id structured metadata
     51         datasourceUid: loki
     52         spanStartTimeShift: "-1m"
     53         spanEndTimeShift: "1m"
     54         filterByTraceID: false
     55         filterBySpanID: false
     56         customQuery: true
     57         query: '{service_name=~".+"} | trace_id = `$${__span.traceId}`'