// Alloy tracing configuration for ringtail
// Uses Beyla eBPF to auto-instrument HTTP services and export traces to Tempo on indri

// ============== BEYLA eBPF AUTO-INSTRUMENTATION ==============

beyla.ebpf "http_services" {
  discovery {
    // Instrument HTTP services on common ports
    instrument {
      open_ports = "80-9999"
    }

    // Exclude infrastructure pods
    exclude_instrument {
      kubernetes {
        namespace = "kube-system"
      }
    }
    exclude_instrument {
      kubernetes {
        namespace = "tailscale"
      }
    }
    exclude_instrument {
      kubernetes {
        pod_labels = { app = "alloy" }
      }
    }
    exclude_instrument {
      kubernetes {
        pod_labels = { app = "alloy-tracing" }
      }
    }
    exclude_instrument {
      kubernetes {
        pod_labels = { app = "kube-state-metrics" }
      }
    }
    exclude_instrument {
      kubernetes {
        pod_labels = { "app.kubernetes.io/name" = "nvidia-device-plugin" }
      }
    }
  }

  attributes {
    kubernetes {
      enable       = "true"
      cluster_name = "ringtail"
    }
  }

  traces {
    instrumentations = ["http"]
  }

  output {
    traces = [otelcol.processor.batch.default.input]
  }
}

// ============== OTEL TRACE PIPELINE ==============

// Batch traces before export
otelcol.processor.batch "default" {
  output {
    traces = [otelcol.processor.attributes.add_cluster.input]
  }
}

// Add cluster label to all spans
otelcol.processor.attributes "add_cluster" {
  action {
    key   = "cluster"
    value = "ringtail"
    action = "upsert"
  }

  output {
    traces = [otelcol.exporter.otlphttp.tempo.input]
  }
}

// Export traces to Tempo on indri via Tailscale
otelcol.exporter.otlphttp "tempo" {
  client {
    endpoint = "https://tempo-otlp.tail8d86e.ts.net"

    tls {
      insecure_skip_verify = true
    }
  }
}