# OpenTelemetry Collector — OTLP ingress point for app traces. Receives OTLP over
# gRPC (4317) and HTTP (4318), batches, and exports to VictoriaTraces' OTLP endpoint.
# Point your apps' OTEL_EXPORTER_OTLP_ENDPOINT at otel-collector.monitoring.svc:4317.
apiVersion: v1
kind: ServiceAccount
metadata:
  name: otel-collector
  namespace: monitoring
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: otel-collector-config
  namespace: monitoring
data:
  config.yaml: |
    receivers:
      otlp:
        protocols:
          grpc:
            endpoint: 0.0.0.0:4317
          http:
            endpoint: 0.0.0.0:4318
    processors:
      memory_limiter:
        check_interval: 5s
        limit_percentage: 80
        spike_limit_percentage: 25
      batch:
        timeout: 5s
    exporters:
      otlphttp/victoriatraces:
        # VictoriaTraces (VTSingle CR) OTLP-over-HTTP ingestion endpoint.
        traces_endpoint: http://vtsingle-main.monitoring.svc:10428/insert/opentelemetry/v1/traces
        tls:
          insecure: true
    service:
      pipelines:
        traces:
          receivers: [otlp]
          processors: [memory_limiter, batch]
          exporters: [otlphttp/victoriatraces]
      telemetry:
        metrics:
          address: 0.0.0.0:8888
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: otel-collector
  namespace: monitoring
  labels:
    app.kubernetes.io/name: otel-collector
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: otel-collector
  template:
    metadata:
      labels:
        app.kubernetes.io/name: otel-collector
    spec:
      serviceAccountName: otel-collector
      containers:
        - name: otel-collector
          # Pin to a current release; check https://github.com/open-telemetry/opentelemetry-collector-releases
          image: otel/opentelemetry-collector-contrib:0.119.0
          args: ["--config=/etc/otel/config.yaml"]
          ports:
            - { name: otlp-grpc, containerPort: 4317 }
            - { name: otlp-http, containerPort: 4318 }
            - { name: metrics, containerPort: 8888 }
          volumeMounts:
            - name: config
              mountPath: /etc/otel
          resources:
            requests:
              cpu: 50m
              memory: 128Mi
            limits:
              cpu: 500m
              memory: 512Mi
      volumes:
        - name: config
          configMap:
            name: otel-collector-config
---
apiVersion: v1
kind: Service
metadata:
  name: otel-collector
  namespace: monitoring
  labels:
    app.kubernetes.io/name: otel-collector
spec:
  selector:
    app.kubernetes.io/name: otel-collector
  ports:
    - { name: otlp-grpc, port: 4317, targetPort: 4317 }
    - { name: otlp-http, port: 4318, targetPort: 4318 }
    - { name: metrics, port: 8888, targetPort: 8888 }
---
# Self-scrape the collector's own telemetry into VictoriaMetrics.
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMServiceScrape
metadata:
  name: otel-collector
  namespace: monitoring
  labels:
    app.kubernetes.io/part-of: victoria-metrics
spec:
  selector:
    matchLabels:
      app.kubernetes.io/name: otel-collector
  endpoints:
    - port: metrics