ditto-kamon.conf

# To be included in kamon.conf of all services.

kamon {
  init {
    hide-banner = yes
    attach-instrumentation = no
  }

  metric {
    tick-interval = 10s
  }

  prometheus {
    start-embedded-http-server = false
    buckets {
      default-buckets = [
        1,
        5,
        10,
        15,
        20,
        30,
        100,
        300,
        1000,
        3000,
        10000,
        30000,
        100000
      ]

      time-buckets = [
        0.001,
        0.003,
        0.005,
        0.01,
        0.025,
        0.05,
        0.075,
        0.1,
        0.15,
        0.2,
        0.25,
        0.3,
        0.35,
        0.4,
        0.45,
        0.5,
        0.75,
        1,
        1.25,
        1.5,
        1.75,
        2.0,
        2.5,
        3,
        5,
        7.5,
        10,
        15,
        20,
        25,
        30,
        35,
        40,
        45,
        50,
        55,
        60
      ]
    }
  }

  modules {
    # Important! Disable modules relying on classes in the com.sun.jna package.
    # otherwise we cannot run with OpenJDK Java Docker Images
    process-metrics.enabled = no
    host-metrics.enabled = no
    otel-trace-reporter.enabled = no
    otel-trace-reporter.enabled = ${?DITTO_TRACING_ENABLED}
    otel-trace-reporter.enabled = ${?DITTO_TRACING_OTEL_TRACE_REPORTER_ENABLED}
  }

  trace {
    # disable reporting by default
    #   - always: report all traces.
    #   - never:  don't report any trace.
    #   - random: randomly decide using the probability defined in the random-sampler.probability setting.
    #   - adaptive: keeps dynamic samplers for each operation while trying to achieve a set throughput goal.
    sampler = never
    sampler = ${?DITTO_TRACING_SAMPLER}

    # Probability of a span being sampled. Must be a value between 0 and 1.
    random-sampler.probability = 0.01
    random-sampler.probability = ${?DITTO_TRACING_RANDOM_SAMPLER_PROBABILITY}

    adaptive-sampler.throughput = 600
    adaptive-sampler.throughput = ${?DITTO_TRACING_ADAPTIVE_SAMPLER_THROUGHPUT}

    # must be double for w3c trace context
    identifier-scheme = double
  }

  propagation {
    http {
      default {
        entries {
          incoming.span = "w3c"
          outgoing.span = "w3c"
        }
      }
    }
  }
}