observability/opentelemetry-collector/helm-values.yaml

# OpenTelemetry Collector Helm Values
# Chart: https://github.com/open-telemetry/opentelemetry-helm-charts
#
# Architecture:
# - DaemonSet mode: one collector per node for efficient data collection
# - OTLP receiver for traces, metrics, and logs
# - Exports to: Tempo (traces), Prometheus (metrics), Loki (logs)
#
# Pipeline:
#   Applications → OTel Collector → Tempo/Prometheus/Loki → Grafana

# =============================================================================
# Image Configuration
# =============================================================================
image:
  repository: otel/opentelemetry-collector-contrib

# =============================================================================
# Deployment Mode
# =============================================================================
mode: daemonset

# =============================================================================
# Resource Limits (optimized for small cluster)
# =============================================================================
resources:
  requests:
    cpu: 25m
    memory: 64Mi
  limits:
    memory: 256Mi

# =============================================================================
# Tolerations (run on all nodes including master)
# =============================================================================
tolerations:
  - key: node-role.kubernetes.io/control-plane
    operator: Exists
    effect: NoSchedule

# =============================================================================
# Ports
# =============================================================================
ports:
  otlp:
    enabled: true
    containerPort: 4317
    servicePort: 4317
    hostPort: 4317
    protocol: TCP
  otlp-http:
    enabled: true
    containerPort: 4318
    servicePort: 4318
    hostPort: 4318
    protocol: TCP
  metrics:
    enabled: true
    containerPort: 8888
    servicePort: 8888
    protocol: TCP

# =============================================================================
# OpenTelemetry Collector Configuration
# =============================================================================
config:
  # Receivers - what data the collector accepts
  receivers:
    otlp:
      protocols:
        grpc:
          endpoint: 0.0.0.0:4317
        http:
          endpoint: 0.0.0.0:4318

  # Processors - how data is transformed
  processors:
    # Batch processor for efficient exports
    batch:
      timeout: 10s
      send_batch_size: 1024
      send_batch_max_size: 2048

    # Memory limiter to prevent OOM
    memory_limiter:
      check_interval: 5s
      limit_mib: 200
      spike_limit_mib: 50

    # Add Kubernetes metadata
    k8sattributes:
      extract:
        metadata:
          - k8s.namespace.name
          - k8s.deployment.name
          - k8s.pod.name
          - k8s.node.name
      passthrough: false
      pod_association:
        - sources:
            - from: resource_attribute
              name: k8s.pod.ip
        - sources:
            - from: resource_attribute
              name: k8s.pod.uid
        - sources:
            - from: connection

    # Resource detection
    resourcedetection:
      detectors: [env, system]
      timeout: 5s
      override: false

  # Exporters - where data goes
  exporters:
    # Tempo for traces
    otlp/tempo:
      endpoint: tempo.tempo.svc.cluster.local:4317
      tls:
        insecure: true

    # Prometheus remote write for metrics
    prometheusremotewrite:
      endpoint: http://prometheus-kube-prometheus-prometheus.prometheus.svc:9090/api/v1/write
      tls:
        insecure: true

    # Loki for logs
    loki:
      endpoint: http://loki.loki.svc.cluster.local:3100/loki/api/v1/push
      default_labels_enabled:
        exporter: true
        level: true

    # Debug exporter (for troubleshooting)
    debug:
      verbosity: basic

  # Extensions
  extensions:
    health_check:
      endpoint: 0.0.0.0:13133

  # Service pipelines
  service:
    extensions: [health_check]
    pipelines:
      # Traces pipeline
      traces:
        receivers: [otlp]
        processors: [memory_limiter, k8sattributes, resourcedetection, batch]
        exporters: [otlp/tempo]

      # Metrics pipeline
      metrics:
        receivers: [otlp]
        processors: [memory_limiter, k8sattributes, resourcedetection, batch]
        exporters: [prometheusremotewrite]

      # Logs pipeline
      logs:
        receivers: [otlp]
        processors: [memory_limiter, k8sattributes, resourcedetection, batch]
        exporters: [loki]

# =============================================================================
# Service Account
# =============================================================================
serviceAccount:
  create: true

# =============================================================================
# RBAC for k8sattributes processor
# =============================================================================
clusterRole:
  create: true
  rules:
    - apiGroups: [""]
      resources: ["pods", "namespaces", "nodes"]
      verbs: ["get", "watch", "list"]
    - apiGroups: ["apps"]
      resources: ["replicasets", "deployments"]
      verbs: ["get", "watch", "list"]

# =============================================================================
# ServiceMonitor for Prometheus
# =============================================================================
serviceMonitor:
  enabled: true
  metricsEndpoints:
    - port: metrics
  extraLabels:
    release: prometheus

# =============================================================================
# Pod Monitor for self-monitoring
# =============================================================================
podMonitor:
  enabled: false