Add beholder.config.info metric (#1769)

* Add beholder.config.info metric

* Split creating the metric from recording that on client dialing

* Update pkg/beholder/client.go

Co-authored-by: Jordan Krage <jmank88@gmail.com>

* Small alignment

---------

Co-authored-by: Jordan Krage <jmank88@gmail.com>

Author: kirqz23

pkg/beholder/client.go

@@ -343,6 +343,74 @@ func newOtelResource(cfg Config) (resource *sdkresource.Resource, err error) {
 	return
 }
 
+// RecordConfig records the beholder config as a metric.
+func (c *Client) RecordConfigMetric(ctx context.Context) error {
+	configGauge, configAttrs, err := createConfigMetric(c.Meter, c.Config)
+	if err != nil {
+		return err
+	}
+	configGauge.Record(ctx, 1, otelmetric.WithAttributes(configAttrs...))
+	return nil
+}
+
+// createConfigMetric creates a configuration info metric with Beholder settings as attributes.
+func createConfigMetric(meter otelmetric.Meter, cfg Config) (otelmetric.Int64Gauge, []attribute.KeyValue, error) {
+	configGauge, err := meter.Int64Gauge(
+		"beholder.config.info",
+		otelmetric.WithDescription("Beholder config info metric"),
+		otelmetric.WithUnit("{info}"),
+	)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to create beholder config info metric: %w", err)
+	}
+
+	configAttrs := []attribute.KeyValue{
+		// Logging config
+		attribute.Bool(
+			"log_streaming_enabled", cfg.LogStreamingEnabled),
+		attribute.String(
+			"log_level", cfg.LogLevel.String()),
+		attribute.Bool(
+			"log_batch_processor", cfg.LogBatchProcessor),
+		attribute.String(
+			"log_export_interval", cfg.LogExportInterval.String()),
+		attribute.Int(
+			"log_export_max_batch_size", cfg.LogExportMaxBatchSize),
+		attribute.Int(
+			"log_max_queue_size", cfg.LogMaxQueueSize),
+		attribute.String(
+			"log_compressor", cfg.LogCompressor),
+
+		// Message emitter config
+		attribute.Bool(
+			"chip_ingress_enabled", cfg.ChipIngressEmitterEnabled),
+		attribute.Bool(
+			"emitter_batch_processor", cfg.EmitterBatchProcessor),
+		attribute.String(
+			"emitter_export_interval", cfg.EmitterExportInterval.String()),
+		attribute.Int(
+			"emitter_export_max_batch_size", cfg.EmitterExportMaxBatchSize),
+		attribute.Int(
+			"emitter_max_queue_size", cfg.EmitterMaxQueueSize),
+
+		// Tracing config
+		attribute.Float64(
+			"trace_sample_ratio", cfg.TraceSampleRatio),
+		attribute.String(
+			"trace_batch_timeout", cfg.TraceBatchTimeout.String()),
+		attribute.String(
+			"trace_compressor", cfg.TraceCompressor),
+
+		// Metrics config
+		attribute.String(
+			"metric_reader_interval", cfg.MetricReaderInterval.String()),
+		attribute.String(
+			"metric_compressor", cfg.MetricCompressor),
+	}
+
+	return configGauge, configAttrs, nil
+}
+
 type shutdowner interface {
 	Shutdown(ctx context.Context) error
 }