---
apiVersion: v1
kind: ConfigMap
metadata:
  name: otel-agent-conf
  namespace: tracing
  labels:
    app: opentelemetry
    component: otel-agent-conf
data:
  otel-agent-config: |
    receivers:
      otlp:
        protocols:
          grpc:
          http:
    exporters:
      otlp:
        endpoint: "otel-collector.tracing:4317"
        tls:
          insecure: true
        sending_queue:
          num_consumers: 20
          queue_size: 10000
        retry_on_failure:
          enabled: true
      loadbalancing:
        protocol:
          otlp:
            # all options from the OTLP exporter are supported
            # except the endpoint
            tls:
              insecure: true
            sending_queue:
              num_consumers: 20
              queue_size: 10000
            retry_on_failure:
              enabled: true
        resolver:
          dns:
            hostname: otel-collector.tracing
            port: 4317
    processors:
      resource:
        attributes:
        - key: k8s.cluster.region
          value: "region-name"
          action: insert
        - key: k8s.cluster.name
          value: "cluster-name"
          action: insert
        - key: k8s.cluster.env
          value: "environment-name"
          action: insert
      # The resource detector injects the pod IP
      # to every metric so that the k8sattributes can
      # fetch information afterwards.
      resourcedetection:
        detectors: ["eks"]
        timeout: 5s
        override: true
      memory_limiter:
        check_interval: 1s
        limit_percentage: 50
        spike_limit_percentage: 30
    extensions:
      memory_ballast:
        size_in_percentage: 20
    service:
      pipelines:
        traces/1:
          receivers: [otlp]
          processors: [memory_limiter, batch, resourcedetection, resource]
          exporters: [loadbalancing]
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: otel-agent
  namespace: tracing
  labels:
    app: opentelemetry
    component: otel-agent
spec:
  selector:
    matchLabels:
      app: opentelemetry
      component: otel-agent
  template:
    metadata:
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "8888"
        prometheus.io/path: "/metrics"
      labels:
        app: opentelemetry
        component: otel-agent
    spec:
      containers:
        - command:
            - "/otelcontribcol"
            - "--config=/conf/otel-agent-config.yaml"
          image: otel/opentelemetry-collector-contrib:0.37.1
          name: otel-agent
          env:
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            # This is picked up by the resource detector
            - name: OTEL_RESOURCE
              value: "k8s.pod.ip=$(POD_IP)"
          resources:
            limits:
              cpu: 500m #TODO - adjust this to your own requirements
              memory: 500Mi #TODO - adjust this to your own requirements
            requests:
              cpu: 100m #TODO - adjust this to your own requirements
              memory: 100Mi #TODO - adjust this to your own requirements
          ports:
            - containerPort: 55680 # Default OpenTelemetry receiver port.
              hostPort: 55680
            - containerPort: 4317 # New OpenTelemetry receiver port.
              hostPort: 4317
          volumeMounts:
            - name: otel-agent-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-agent-conf
            items:
              - key: otel-agent-config
                path: otel-agent-config.yaml
          name: otel-agent-config-vol
---