Update On Sat Nov 8 19:37:32 CET 2025

echo/internal/metrics/node_linux.go

@@ -0,0 +1,50 @@
+//go:build linux
+
+package metrics
+
+import (
+	"fmt"
+	"log/slog"
+	"os"
+	"strings"
+
+	"github.com/Ehco1996/ehco/internal/config"
+	"github.com/alecthomas/kingpin/v2"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/node_exporter/collector"
+)
+
+// zapLevelToSlogLevel converts zap log level string to slog.Level
+func zapLevelToSlogLevel(zapLevel string) slog.Level {
+	switch strings.ToLower(zapLevel) {
+	case "debug":
+		return slog.LevelDebug
+	case "info":
+		return slog.LevelInfo
+	case "warn", "warning":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}
+
+func RegisterNodeExporterMetrics(cfg *config.Config) error {
+	slogLevel := zapLevelToSlogLevel(cfg.LogLeveL)
+	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
+		Level: slogLevel,
+	}))
+
+	// node_exporter relay on `kingpin` to enable default node collector
+	// see https://github.com/prometheus/node_exporter/pull/2463
+	if _, err := kingpin.CommandLine.Parse([]string{}); err != nil {
+		return err
+	}
+	nc, err := collector.NewNodeCollector(logger)
+	if err != nil {
+		return fmt.Errorf("couldn't create collector: %s", err)
+	}
+	prometheus.MustRegister(nc)
+	return nil
+}