apiVersion: apps/v1
kind: Deployment
metadata:
  name: otel-collector
  namespace: meta
spec:
  replicas: 1
  selector:
    matchLabels:
      app: otel-collector
  template:
    metadata:
      labels:
        app: otel-collector
    spec:
      containers:
        - name: otel-collector
          image: otel/opentelemetry-collector:latest
          args: ["--config=/etc/otel/otel-collector-config.yaml"]
          volumeMounts:
            - name: otel-config
              mountPath: /etc/otel
          ports:
            - name: prom
              containerPort: 8889
            - name: grpc
              containerPort: 4317
            - name: http
              containerPort: 4318
      volumes:
        - name: otel-config
          configMap:
            name: otel-collector-config
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: otel-collector-config
  namespace: meta
data:
  otel-collector-config.yaml: |
    receivers:
      otlp:
        protocols:
          grpc:
            endpoint: 0.0.0.0:4317
          http:
            endpoint: 0.0.0.0:4318

    exporters:
      otlp:
        endpoint: tempo:4317
        tls:
          insecure: true

      prometheus:
        endpoint: "0.0.0.0:8889"

    service:
      pipelines:
        traces:
          receivers: [otlp]
          exporters: [otlp]

        metrics:
          receivers: [otlp]
          exporters: [prometheus]
---
apiVersion: v1
kind: Service
metadata:
  name: otel-collector
  namespace: meta
  labels:
    release: kps # this MUST match the `release:` label used by your Prometheus install
    app: otel-collector
spec:
  ports:
    - name: grpc
      port: 4317
      targetPort: 4317
    - name: http
      port: 4318
      targetPort: 4318
    - name: prom
      port: 8889
      targetPort: 8889
  selector:
    app: otel-collector
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: otel-collector
  namespace: meta
  labels:
    release: kps # again, must match Prometheus's release label
spec:
  selector:
    matchLabels:
      app: otel-collector
  endpoints:
    - port: prom
      interval: 15s