fix: use debug level for readiness checks logs

CHANGELOG.md

@@ -158,6 +158,9 @@ Adding a new version? You'll need three changes:
   deterministically sorted by their creation timestamps, names and internal
   rule orders to `2^12=4096` and number of `GRPCRoutes` can be sorted to `2^8=256`.
   [#5024](https://github.com/Kong/kubernetes-ingress-controller/pull/5024)
+- Error logs emitted from Gateway Discovery readiness checker that should be
+  logged at `debug` level are now logged at that level.
+  [#5029](https://github.com/Kong/kubernetes-ingress-controller/pull/5029)
 
 ### Changed
 

internal/clients/readiness.go

@@ -105,7 +105,7 @@ func (c DefaultReadinessChecker) checkPendingClient(
 	client, err := c.factory.CreateAdminAPIClient(ctx, pendingClient)
 	if err != nil {
 		// Despite the error reason we still want to keep the client in the pending list to retry later.
-		c.logger.V(util.DebugLevel).Error(err, fmt.Sprintf("pending client for %q is not ready yet", pendingClient.Address))
+		c.logger.V(util.DebugLevel).Info(fmt.Sprintf("pending client for %q is not ready yet", pendingClient.Address), "reason", err.Error())
 		return nil
 	}
 
@@ -148,9 +148,9 @@ func (c DefaultReadinessChecker) checkAlreadyCreatedClient(ctx context.Context,
 	defer cancel()
 	if err := client.IsReady(ctx); err != nil {
 		// Despite the error reason we still want to keep the client in the pending list to retry later.
-		c.logger.V(util.DebugLevel).Error(
-			err,
+		c.logger.V(util.DebugLevel).Info(
 			fmt.Sprintf("already created client for %q is not ready, moving to pending", client.BaseRootURL()),
+			"reason", err.Error(),
 		)
 		return false
 	}

internal/dataplane/sendconfig/backoff_strategy.go

@@ -58,7 +58,7 @@ func (s UpdateStrategyWithBackoff) Update(ctx context.Context, targetContent Con
 
 	err, resourceErrors, resourceErrorsParseErr = s.decorated.Update(ctx, targetContent)
 	if err != nil {
-		s.logger.V(util.DebugLevel).Error(err, "Update failed, registering it for backoff strategy")
+		s.logger.V(util.DebugLevel).Info("Update failed, registering it for backoff strategy", "reason", err.Error())
 		s.backoffStrategy.RegisterUpdateFailure(err, targetContent.Hash)
 	} else {
 		s.backoffStrategy.RegisterUpdateSuccess()