---
apiVersion: v1
kind: ConfigMap
metadata:
  name: otel-collector-conf
  namespace: tracing
  labels:
    app: opentelemetry
    component: otel-collector-conf
data:
  otel-collector-config: |
    receivers:
      otlp:
        protocols:
          grpc:
          http:
    processors:
      # This processor inspects spans looking for matching attributes.
      # Spans that DONT MATCH this will have a new attribute added named retain-span
      # This is then used by the tail_sampling processor to only export spans that
      # have the retain-span attribute.
      # All conditions have to match here to be excluded.
      attributes/filter_spans1:
        exclude:
          match_type: strict
          attributes:
            - {key: "foo", value: "bar"}
        actions:
          - key: retain-span
            action: insert
            value: "true"
      attributes/filter_spans2:
        include:
          match_type: regexp
          regexp:
            # cacheenabled determines whether match results are LRU cached to make subsequent matches faster.
            # Cache size is unlimited unless cachemaxnumentries is also specified.
            cacheenabled: true
          span_names: ["serviceA*"]
        actions:
          - key: retain-span
            action: update
            value: "false"
      # Any policy match will make the trace be sampled !, enable regex didnt caused nothing to match
      tail_sampling:
        decision_wait: 10s
        expected_new_traces_per_sec: 300
        policies:
          [   
            {
              name: policy-retain-span,
              type: string_attribute,
              string_attribute: {key: retain-span, values: ['true']}
            },
            {
            name: rate-limiting-policy,
            type: rate_limiting,
            rate_limiting: {spans_per_second: 35}
            },
            {
            name: probabilistic-sampling,
            type: probabilistic,
            probabilistic: {sampling_percentage: 50}
            }
          ]
      # The k8sattributes in the Agent is in passthrough mode
      # so that it only tags with the minimal info for the
      # collector k8sattributes to complete
      k8sattributes:
        passthrough: true
      memory_limiter:
        check_interval: 1s
        limit_percentage: 50
        spike_limit_percentage: 30
    extensions:
      memory_ballast:
        size_in_percentage: 20
    exporters:
      logging:
        loglevel: info
      otlp/data-prepper:
        endpoint: data-prepper-headless:21890
        tls:
          insecure: true
      jaeger:
        endpoint: "http://jaeger-collector.tracing.svc.cluster.local:14250"
        tls:
          insecure: true
    service:
      pipelines:
        traces/1:
          receivers: [otlp]
          processors: [memory_limiter, k8sattributes, attributes/filter_spans1, attributes/filter_spans2, tail_sampling]
          exporters: [jaeger, otlp/data-prepper]
---
apiVersion: v1
kind: Service
metadata:
  name: otel-collector
  namespace: tracing
  labels:
    app: opentelemetry
    component: otel-collector
spec:
  ports:
    - name: otlp # Default endpoint for OpenTelemetry receiver.
      port: 55680
      protocol: TCP
      targetPort: 55680
    - name: grpc-otlp # New endpoint for OpenTelemetry receiver.
      port: 4317
      protocol: TCP
      targetPort: 4317
    - name: metrics # Default endpoint for querying metrics.
      port: 8888
  selector:
    component: otel-collector
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: otel-collector
  namespace: tracing
  labels:
    app: opentelemetry
    component: otel-collector
spec:
  selector:
    matchLabels:
      app: opentelemetry
      component: otel-collector
  minReadySeconds: 5
  progressDeadlineSeconds: 120
  replicas: 4 #TODO - adjust this to your own requirements
  template:
    metadata:
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "8888"
        prometheus.io/path: "/metrics"
      labels:
        app: opentelemetry
        component: otel-collector
    spec:
      containers:
        - command:
            - "/otelcontribcol"
            - "--log-level=debug"
            - "--config=/conf/otel-collector-config.yaml"
          image: otel/opentelemetry-collector-contrib:0.37.1
          name: otel-collector
          resources:
            limits:
              cpu: 2 #TODO - adjust this to your own requirements
              memory: 4Gi #TODO - adjust this to your own requirements
            requests:
              cpu: 1 #TODO - adjust this to your own requirements
              memory: 2Gi #TODO - adjust this to your own requirements
          ports:
            - containerPort: 55680 # Default endpoint for OpenTelemetry receiver.
            - containerPort: 4317 # Default endpoint for OpenTelemetry receiver.
            - containerPort: 8888 # Default endpoint for querying metrics.
          volumeMounts:
            - name: otel-collector-config-vol
              mountPath: /conf
          livenessProbe:
            httpGet:
              path: /
              port: 13133 # Health Check extension default port.
          readinessProbe:
            httpGet:
              path: /
              port: 13133 # Health Check extension default port.
      volumes:
        - configMap:
            name: otel-collector-conf
            items:
              - key: otel-collector-config
                path: otel-collector-config.yaml
          name: otel-collector-config-vol
---