apiVersion: v1
kind: Service
metadata: { name: otel-collector, namespace: observability }
spec:
  selector: { app: otel-collector }
  ports:
    - { name: otlp-http, port: 4318, targetPort: 4318 }
    - { name: otlp-grpc, port: 4317, targetPort: 4317 }
---
apiVersion: apps/v1
kind: Deployment
metadata: { name: otel-collector, namespace: observability }
spec:
  replicas: 2
  selector: { matchLabels: { app: otel-collector } }
  template:
    metadata: { labels: { app: otel-collector } }
    spec:
      nodeSelector: { node: hetzner-2 }
      containers:
      - name: otel-collector
        image: otel/opentelemetry-collector-contrib:0.102.0
        args: ["--config=/etc/otel/config.yaml"]
        ports:
          - { containerPort: 4318 }
          - { containerPort: 4317 }
        volumeMounts:
          - { name: cfg, mountPath: /etc/otel }
      volumes:
        - { name: cfg, configMap: { name: otel-config } }
---
apiVersion: v1
kind: ConfigMap
metadata: { name: otel-config, namespace: observability }
data:
  config.yaml: |
    receivers:
      otlp:
        protocols: { http: {}, grpc: {} }
    processors: { batch: {} }
    exporters:
      logging: {}
      elasticsearch:
        endpoints: ["http://elasticsearch.elastic.svc.cluster.local:9200"]
        logs_index: "k8s-logs"
    service:
      pipelines:
        logs:     { receivers: [otlp], processors: [batch], exporters: [elasticsearch, logging] }
        traces:   { receivers: [otlp], processors: [batch], exporters: [logging] }
        metrics:  { receivers: [otlp], processors: [batch], exporters: [logging] }
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: otlp
  namespace: observability
  annotations: { cert-manager.io/cluster-issuer: letsencrypt-prod }
spec:
  ingressClassName: nginx
  tls: [{ hosts: ["otlp.betelgeusebytes.io"], secretName: otlp-tls }]
  rules:
  - host: otlp.betelgeusebytes.io
    http:
      paths:
      - path: /v1/traces
        pathType: Prefix
        backend: { service: { name: otel-collector, port: { number: 4318 } } }
      - path: /v1/metrics
        pathType: Prefix
        backend: { service: { name: otel-collector, port: { number: 4318 } } }
      - path: /v1/logs
        pathType: Prefix
        backend: { service: { name: otel-collector, port: { number: 4318 } } }