service.criticality를 사용한 테일 기반 샘플링

processors:
  tail_sampling:
    decision_wait: 10s
    num_traces: 100000
    expected_new_traces_per_sec: 1000
    policies:
      # 정책 1: 핵심 서비스는 항상 샘플링한다(100%)
      - name: critical-services-always-sample
        type: string_attribute
        string_attribute:
          key: service.criticality
          values:
            - critical
          enabled_regex_matching: false
          invert_match: false

      # 정책 2: 중요도가 높은 서비스는 50% 비율로 샘플링한다
      - name: high-criticality-probabilistic
        type: and
        and:
          and_sub_policy:
            - name: is-high-criticality
              type: string_attribute
              string_attribute:
                key: service.criticality
                values:
                  - high
            - name: probabilistic-50
              type: probabilistic
              probabilistic:
                sampling_percentage: 50

      # 정책 3: 중요도가 중간인 서비스는 10% 비율로 샘플링한다
      - name: medium-criticality-probabilistic
        type: and
        and:
          and_sub_policy:
            - name: is-medium-criticality
              type: string_attribute
              string_attribute:
                key: service.criticality
                values:
                  - medium
            - name: probabilistic-10
              type: probabilistic
              probabilistic:
                sampling_percentage: 10

      # 정책 4: 중요도가 낮은 서비스는 1% 비율로 샘플링한다
      - name: low-criticality-probabilistic
        type: and
        and:
          and_sub_policy:
            - name: is-low-criticality
              type: string_attribute
              string_attribute:
                key: service.criticality
                values:
                  - low
            - name: probabilistic-1
              type: probabilistic
              probabilistic:
                sampling_percentage: 1

      # 정책 5: 중요도와 관계없이 오류 트레이스는 항상 샘플링한다
      - name: errors-always-sample
        type: status_code
        status_code:
          status_codes:
            - ERROR

      # 정책 6: 핵심 서비스와 중요도가 높은 서비스의 느린 트레이스는 항상 샘플링한다
      - name: slow-critical-traces
        type: and
        and:
          and_sub_policy:
            - name: is-critical-or-high
              type: string_attribute
              string_attribute:
                key: service.criticality
                values:
                  - critical
                  - high
            - name: is-slow
              type: latency
              latency:
                threshold_ms: 5000

service:
  pipelines:
    traces:
      receivers: [otlp]
      processors:
        [
          resourcedetection,
          memory_limiter,
          transform/sanitize_spans,
          tail_sampling,
        ]
      exporters: [otlp_grpc/jaeger, debug, span_metrics]