feat: shipping de logs journald a Loki (config loki_url + shipper journalctl→PushLokiStream)

main.go

@@ -15,6 +15,7 @@
 package main
 
 import (
+	"context"
 	"flag"
 	"log"
 	"os"
@@ -46,14 +47,27 @@ func main() {
 		return
 	}
 
-	ticker := time.NewTicker(time.Duration(cfg.IntervalSec) * time.Second)
-	defer ticker.Stop()
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
 
 	stop := make(chan os.Signal, 1)
 	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		<-stop
+		log.Print("shutting down")
+		cancel()
+	}()
 
-	// Push once right away so a freshly started node shows up immediately,
-	// then keep pushing on every tick.
+	// Optional: ship systemd journal logs to Loki in the background.
+	if cfg.LokiURL != "" {
+		go shipJournald(ctx, cfg)
+	}
+
+	ticker := time.NewTicker(time.Duration(cfg.IntervalSec) * time.Second)
+	defer ticker.Stop()
+
+	// Push metrics once right away so a freshly started node shows up
+	// immediately, then keep pushing on every tick.
 	if err := pushOnce(cfg); err != nil {
 		log.Printf("push error: %v", err)
 	}
@@ -63,8 +77,7 @@ func main() {
 			if err := pushOnce(cfg); err != nil {
 				log.Printf("push error: %v", err)
 			}
-		case <-stop:
-			log.Print("shutting down")
+		case <-ctx.Done():
 			return
 		}
 	}