[#370] Add tree service metrics

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

pkg/services/tree/replicator.go

@@ -75,6 +75,7 @@ func (s *Service) replicationWorker(ctx context.Context) {
 					attribute.String("public_key", hex.EncodeToString(task.n.PublicKey())),
 				),
 			)
+			start := time.Now()
 
 			var lastErr error
 			var lastAddr string
@@ -113,6 +114,9 @@ func (s *Service) replicationWorker(ctx context.Context) {
 						zap.String("address", lastAddr),
 						zap.String("key", hex.EncodeToString(task.n.PublicKey())))
 				}
+				s.metrics.AddReplicateTaskDuration(time.Since(start), false)
+			} else {
+				s.metrics.AddReplicateTaskDuration(time.Since(start), true)
 			}
 			span.End()
 		}
@@ -137,6 +141,7 @@ func (s *Service) replicateLoop(ctx context.Context) {
 		case <-ctx.Done():
 			return
 		case op := <-s.replicateCh:
+			start := time.Now()
 			err := s.replicate(op)
 			if err != nil {
 				s.log.Error(logs.TreeErrorDuringReplication,
@@ -144,6 +149,7 @@ func (s *Service) replicateLoop(ctx context.Context) {
 					zap.Stringer("cid", op.cid),
 					zap.String("treeID", op.treeID))
 			}
+			s.metrics.AddReplicateWaitDuration(time.Since(start), err == nil)
 		}
 	}
 }