chore(mads): supplement debug log for snapshot reconcile

Signed-off-by: Icarus Wu <icaruswu66@qq.com>

pkg/mads/v1/reconcile/interfaces.go

@@ -4,11 +4,12 @@ import (
 	"context"
 
 	envoy_core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
+	"github.com/go-logr/logr"
 )
 
 // Reconciler re-computes configuration for a given node.
 type Reconciler interface {
-	Reconcile(context.Context) error
+	Reconcile(context.Context, logr.Logger) error
 	// NeedsReconciliation checks if there is a valid configuration snapshot already present
 	// for a given node
 	NeedsReconciliation(node *envoy_core.Node) bool

pkg/mads/v1/reconcile/reconciler.go

@@ -7,6 +7,7 @@ import (
 
 	envoy_core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
 	envoy_cache "github.com/envoyproxy/go-control-plane/pkg/cache/v3"
+	"github.com/go-logr/logr"
 
 	util_xds_v3 "github.com/kumahq/kuma/pkg/util/xds/v3"
 )
@@ -35,7 +36,7 @@ func (r *reconciler) KnownClientIds() map[string]bool {
 	return maps.Clone(r.knownClientIds)
 }
 
-func (r *reconciler) Reconcile(ctx context.Context) error {
+func (r *reconciler) Reconcile(ctx context.Context, log logr.Logger) error {
 	newSnapshotPerClient, err := r.generator.GenerateSnapshot(ctx)
 	if err != nil {
 		return err
@@ -50,8 +51,10 @@ func (r *reconciler) Reconcile(ctx context.Context) error {
 		oldSnapshot, _ := r.cache.GetSnapshot(clientId)
 		switch {
 		case oldSnapshot == nil:
+			log.V(2).Info("no snapshot found", "clientId", clientId)
 			snap = newSnapshot
 		case !util_xds_v3.SingleTypeSnapshotEqual(oldSnapshot, newSnapshot):
+			log.V(2).Info("detected changes in the snapshots", "oldSnapshot", oldSnapshot, "newSnapshot", newSnapshot)
 			snap = newSnapshot
 		default:
 			snap = oldSnapshot

pkg/mads/v1/service/components.go

@@ -18,6 +18,7 @@ import (
 
 type restReconcilerCallbacks struct {
 	reconciler mads_reconcile.Reconciler
+	log        logr.Logger
 }
 
 func (r *restReconcilerCallbacks) OnFetchRequest(ctx context.Context, request util_xds.DiscoveryRequest) error {
@@ -34,16 +35,16 @@ func (r *restReconcilerCallbacks) OnFetchRequest(ctx context.Context, request ut
 	}
 
 	if r.reconciler.NeedsReconciliation(node) {
-		return r.reconciler.Reconcile(ctx)
+		return r.reconciler.Reconcile(ctx, r.log)
 	}
 	return nil
 }
 
 func (r *restReconcilerCallbacks) OnFetchResponse(request util_xds.DiscoveryRequest, response util_xds.DiscoveryResponse) {
 }
 
-func NewReconcilerRestCallbacks(reconciler mads_reconcile.Reconciler) util_xds.RestCallbacks {
-	return &restReconcilerCallbacks{reconciler: reconciler}
+func NewReconcilerRestCallbacks(reconciler mads_reconcile.Reconciler, log logr.Logger) util_xds.RestCallbacks {
+	return &restReconcilerCallbacks{reconciler: reconciler, log: log}
 }
 
 func NewSyncTracker(reconciler mads_reconcile.Reconciler, refresh time.Duration, log logr.Logger) envoy_xds.Callbacks {
@@ -55,7 +56,7 @@ func NewSyncTracker(reconciler mads_reconcile.Reconciler, refresh time.Duration,
 			},
 			OnTick: func(ctx context.Context) error {
 				log.V(1).Info("on tick")
-				return reconciler.Reconcile(ctx)
+				return reconciler.Reconcile(ctx, log)
 			},
 			OnError: func(err error) {
 				log.Error(err, "OnTick() failed")

pkg/mads/v1/service/service.go

@@ -34,7 +34,7 @@ func NewService(config *mads.MonitoringAssignmentServerConfig, rm core_manager.R
 		// issue: https://github.com/kumahq/kuma/issues/8764
 		NewSyncTracker(reconciler, config.AssignmentRefreshInterval.Duration, log),
 		// For on-demand reconciliation
-		util_xds_v3.AdaptRestCallbacks(NewReconcilerRestCallbacks(reconciler)),
+		util_xds_v3.AdaptRestCallbacks(NewReconcilerRestCallbacks(reconciler, log)),
 	}
 	srv := NewServer(cache, callbacks)
 

pkg/mads/v1/service_test.go

@@ -12,7 +12,6 @@ import (
 	"github.com/emicklei/go-restful/v3"
 	envoy_core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
 	envoy_v3 "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
-	"github.com/go-logr/logr"
 	"github.com/golang/protobuf/jsonpb"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
@@ -22,11 +21,13 @@ import (
 	observability_v1 "github.com/kumahq/kuma/api/observability/v1"
 	mads_config "github.com/kumahq/kuma/pkg/config/mads"
 	config_types "github.com/kumahq/kuma/pkg/config/types"
+	"github.com/kumahq/kuma/pkg/core"
 	core_mesh "github.com/kumahq/kuma/pkg/core/resources/apis/mesh"
 	core_manager "github.com/kumahq/kuma/pkg/core/resources/manager"
 	"github.com/kumahq/kuma/pkg/core/resources/model"
 	"github.com/kumahq/kuma/pkg/core/resources/store"
 	rest_error_types "github.com/kumahq/kuma/pkg/core/rest/errors/types"
+	"github.com/kumahq/kuma/pkg/log"
 	mads_v1 "github.com/kumahq/kuma/pkg/mads/v1"
 	"github.com/kumahq/kuma/pkg/mads/v1/service"
 	"github.com/kumahq/kuma/pkg/plugins/resources/memory"
@@ -57,7 +58,7 @@ var _ = Describe("MADS http service", func() {
 		cfg.AssignmentRefreshInterval = config_types.Duration{Duration: refreshInterval}
 		cfg.DefaultFetchTimeout = config_types.Duration{Duration: defaultFetchTimeout}
 
-		svc := service.NewService(cfg, resManager, logr.Discard(), nil)
+		svc := service.NewService(cfg, resManager, core.NewLogger(log.DebugLevel), nil)
 
 		ws := new(restful.WebService)
 		svc.RegisterRoutes(ws)