Switch to slog, remove logrus (#1672)

udp/udp_tester.go

@@ -4,12 +4,13 @@
 package udp
 
 import (
+	"context"
 	"io"
+	"log/slog"
 	"net/netip"
 	"os"
 	"sync"
 
-	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula/config"
 	"github.com/slackhq/nebula/header"
 )
@@ -46,10 +47,10 @@ type TesterConn struct {
 	done      chan struct{}
 	closeOnce sync.Once
 
-	l *logrus.Logger
+	l *slog.Logger
 }
 
-func NewListener(l *logrus.Logger, ip netip.Addr, port int, _ bool, _ int) (Conn, error) {
+func NewListener(l *slog.Logger, ip netip.Addr, port int, _ bool, _ int) (Conn, error) {
 	return &TesterConn{
 		Addr:      netip.AddrPortFrom(ip, uint16(port)),
 		RxPackets: make(chan *Packet, 10),
@@ -67,11 +68,12 @@ func (u *TesterConn) Send(packet *Packet) {
 	if err := h.Parse(packet.Data); err != nil {
 		panic(err)
 	}
-	if u.l.Level >= logrus.DebugLevel {
-		u.l.WithField("header", h).
-			WithField("udpAddr", packet.From).
-			WithField("dataLen", len(packet.Data)).
-			Debug("UDP receiving injected packet")
+	if u.l.Enabled(context.Background(), slog.LevelDebug) {
+		u.l.Debug("UDP receiving injected packet",
+			"header", h,
+			"udpAddr", packet.From,
+			"dataLen", len(packet.Data),
+		)
 	}
 	select {
 	case <-u.done: