otelcol.yaml

# Simplified version: Focus on OTLP metrics collection and Prometheus export
receivers:
  otlp:                                      # OTLP protocol receiver
    protocols:
      grpc:                                  # OTLP gRPC receiver for rustfs metrics data
        endpoint: 0.0.0.0:4317               # gRPC endpoint for receiving metrics
processors:
  batch:                                     # Batch processor to improve throughput
    timeout: 5s                              # Maximum time to wait before sending a batch
    send_batch_size: 1000                    # Maximum batch size
  memory_limiter:                            # Memory limiter to prevent OOM
    check_interval: 1s                       # Interval to check memory usage
    limit_mib: 256                           # Reduce memory limit to 256MB
exporters:
  prometheus:                                # Prometheus exporter for Grafana scraping
    endpoint: "0.0.0.0:9200"                 # Endpoint for Grafana to scrape metrics
    namespace: "rustfs"                      # Metrics prefix (will prefix all metrics with "rustfs_")
    send_timestamps: true                    # Include timestamps with metrics
service:
  pipelines:
    metrics:                                 # Keep only metrics pipeline
      receivers: [otlp]                      # Receive OTLP metrics from rustfs
      processors: [memory_limiter, batch]    # Apply memory limiting and batching
      exporters: [prometheus]                # Export to Prometheus for Grafana
  telemetry:
    logs:
      level: "warn"                          # Reduce log level to minimize output
    metrics:
      readers:
      - pull:
          exporter:
            prometheus:
              host: 0.0.0.0                  # Host for internal metrics endpoint
              port: 8888                     # Port for internal metrics endpoint
              without_units: true            # Export metrics without units for compatibility