Print peer address

cmd/collector/server.go

@@ -8,6 +8,7 @@ import (
 	pb "git.ipng.ch/ipng/nginx-logtail/proto/logtailpb"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/peer"
 	"google.golang.org/grpc/status"
 )
 
@@ -62,15 +63,23 @@ func (srv *Server) ListTargets(_ context.Context, _ *pb.ListTargetsRequest) (*pb
 	}, nil
 }
 
+func peerAddr(ctx context.Context) string {
+	if p, ok := peer.FromContext(ctx); ok {
+		return p.Addr.String()
+	}
+	return "unknown"
+}
+
 func (srv *Server) StreamSnapshots(req *pb.SnapshotRequest, stream grpc.ServerStreamingServer[pb.Snapshot]) error {
 	ch := srv.store.Subscribe()
 	defer srv.store.Unsubscribe(ch)
 
-	log.Printf("server: new StreamSnapshots subscriber from %v", stream.Context().Value("peer"))
+	addr := peerAddr(stream.Context())
+	log.Printf("server: new StreamSnapshots subscriber from %s", addr)
 	for {
 		select {
 		case <-stream.Context().Done():
-			log.Printf("server: StreamSnapshots subscriber disconnected")
+			log.Printf("server: StreamSnapshots subscriber disconnected: %s", addr)
 			return nil
 		case snap, ok := <-ch:
 			if !ok {