# Tempo Helm Values
# Chart: https://github.com/grafana/helm-charts/tree/main/charts/tempo
#
# Architecture:
# - Single binary (monolithic) mode for small clusters
# - S3 (MinIO) for trace storage
# - OTLP receiver for OpenTelemetry data
# - Integrates with Grafana for trace visualization

# Medium priority for observability
priorityClassName: medium-priority

# =============================================================================
# Resource Limits (optimized for small cluster)
# =============================================================================
resources:
  requests:
    cpu: 50m
    memory: 128Mi
  limits:
    memory: 128Mi

# =============================================================================
# Tempo Configuration
# =============================================================================
tempo:
  # Receivers - protocols Tempo accepts
  receivers:
    otlp:
      protocols:
        grpc:
          endpoint: 0.0.0.0:4317
        http:
          endpoint: 0.0.0.0:4318

  # Retention settings
  retention: 72h  # Keep traces for 3 days

  # Backend storage (S3/MinIO)
  storage:
    trace:
      backend: s3
      s3:
        bucket: tempo
        endpoint: minio.minio.svc.cluster.local:9000
        insecure: true
        forcepathstyle: true
      wal:
        path: /var/tempo/wal

  # Query settings
  querier:
    frontend_worker:
      frontend_address: ""

  # Metrics generator for trace-derived metrics
  metricsGenerator:
    enabled: true
    remoteWriteUrl: http://prometheus-kube-prometheus-prometheus.prometheus.svc:9090/api/v1/write

  # MinIO S3 credentials
  extraEnv:
    - name: AWS_ACCESS_KEY_ID
      valueFrom:
        secretKeyRef:
          name: minio-s3-credentials
          key: AWS_ACCESS_KEY_ID
    - name: AWS_SECRET_ACCESS_KEY
      valueFrom:
        secretKeyRef:
          name: minio-s3-credentials
          key: AWS_SECRET_ACCESS_KEY

  # Additional volume mounts for WAL
  extraVolumeMounts:
    - name: tempo-data
      mountPath: /var/tempo

# =============================================================================
# Persistence - Disabled (use emptyDir for WAL, data in MinIO)
# =============================================================================
persistence:
  enabled: false

# emptyDir volume for WAL
extraVolumes:
  - name: tempo-data
    emptyDir:
      sizeLimit: 2Gi

# =============================================================================
# Service
# =============================================================================
service:
  type: ClusterIP

# =============================================================================
# ServiceMonitor for Prometheus
# =============================================================================
serviceMonitor:
  enabled: true
  additionalLabels:
    release: prometheus