prepare release v0.4.0

Signed-off-by: Knut Ahlers <knut@ahlers.me>

History.md

@@ -1,3 +1,7 @@
+# 0.4.0 / 2024-04-15
+
+  * Improve logging for up/down changes
+
 # 0.3.0 / 2024-04-15
 
   * Add support for hostnames in addresses

pkg/servicemonitor/monitor.go

@@ -76,14 +76,24 @@ func (m Monitor) updateRoutingTargets(checker healthcheck.Checker) (err error) {
 			}
 
 			if err := checker.Check(m.svc.HealthCheck.Settings, t); err != nil {
-				logger.WithError(err).Debug("detected target down")
-				changed = changed || m.ipt.UnregisterServiceTarget(m.svc.Name, tgt)
+				if m.ipt.UnregisterServiceTarget(m.svc.Name, tgt) {
+					logger.WithError(err).Warn("detected target down")
+					changed = true
+				} else {
+					logger.WithError(err).Debug("detected target down")
+				}
+
 				down = append(down, t.String())
 				return
 			}
 
-			logger.Debug("target up")
-			changed = changed || m.ipt.RegisterServiceTarget(m.svc.Name, tgt)
+			if m.ipt.RegisterServiceTarget(m.svc.Name, tgt) {
+				logger.Info("target up")
+				changed = true
+			} else {
+				logger.Debug("target up")
+			}
+
 			up = append(up, t.String())
 		}()
 	}