Add slog structured logging to main controllers

    Integrated slog logging into the MirrorPeerSecretReconciler, MirrorPeerReconciler, and DRPolicyReconciler controllers.
    Improved error handling and logging for better observability and debugging.
    Replaced klog with slog for consistency across the codebase.

Changes include:

    Added Logger field to controller structs to pass and use slog.Logger.
    Enhanced logging messages to provide more context, including function names, object names, namespaces, and error details.

Signed-off-by: vbadrina <[email protected]>

.golangci.yaml

@@ -5,6 +5,11 @@ run:
   timeout: 5m
   modules-download-mode: readonly
 
+
+linters:
+  enable:
+    - sloglint
+
 linters-settings:
   errcheck:
     # report about not checking of errors in type assertions: `a := b.(MyStruct)`;

addons/agent_mirrorpeer_controller_test.go

@@ -148,6 +148,7 @@ func TestMirrorPeerReconcile(t *testing.T) {
 			SpokeClient:      fakeSpokeClient,
 			Scheme:           scheme,
 			SpokeClusterName: pr.ClusterName,
+			Logger:           utils.GetLogger(true),
 		}
 
 		req := ctrl.Request{
@@ -209,6 +210,7 @@ func TestDisableMirroring(t *testing.T) {
 			SpokeClient:      fakeSpokeClient,
 			Scheme:           scheme,
 			SpokeClusterName: pr.ClusterName,
+			Logger:           utils.GetLogger(true),
 		}
 		if err := r.disableMirroring(ctx, pr.StorageClusterRef.Name, pr.StorageClusterRef.Namespace, &mirrorpeer1); err != nil {
 			t.Error("failed to disable mirroring", err)
@@ -258,6 +260,7 @@ func TestDeleteGreenSecret(t *testing.T) {
 			SpokeClient:      fakeSpokeClient,
 			Scheme:           scheme,
 			SpokeClusterName: pr.ClusterName,
+			Logger:           utils.GetLogger(true),
 		}
 
 		if err := r.deleteGreenSecret(ctx, pr.ClusterName, pr.StorageClusterRef.Namespace, &mirrorpeer1); err != nil {
@@ -297,6 +300,7 @@ func TestDeleteS3(t *testing.T) {
 			SpokeClient:      fakeSpokeClient,
 			Scheme:           scheme,
 			SpokeClusterName: pr.ClusterName,
+			Logger:           utils.GetLogger(true),
 		}
 		if err := r.deleteS3(ctx, mirrorpeer1, pr.StorageClusterRef.Namespace); err != nil {
 			t.Errorf("failed to delete s3 bucket")

addons/blue_secret_controller.go

@@ -2,6 +2,7 @@ package addons
 
 import (
 	"context"
+	"log/slog"
 
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/builder"
@@ -13,7 +14,6 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/runtime"
-	"k8s.io/klog/v2"
 )
 
 // BlueSecretReconciler reconciles a MirrorPeer object
@@ -22,6 +22,7 @@ type BlueSecretReconciler struct {
 	HubClient        client.Client
 	SpokeClient      client.Client
 	SpokeClusterName string
+	Logger           *slog.Logger
 }
 
 // SetupWithManager sets up the controller with the Manager.
@@ -45,6 +46,8 @@ func (r *BlueSecretReconciler) SetupWithManager(mgr ctrl.Manager) error {
 		},
 	}
 
+	r.Logger.Info("Setting up controller with manager")
+
 	return ctrl.NewControllerManagedBy(mgr).
 		Named("bluesecret_controller").
 		Watches(&corev1.Secret{}, &handler.EnqueueRequestForObject{},
@@ -55,22 +58,26 @@ func (r *BlueSecretReconciler) SetupWithManager(mgr ctrl.Manager) error {
 func (r *BlueSecretReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
 	var err error
 	var secret corev1.Secret
+	logger := r.Logger.With("secret", req.NamespacedName.String())
 
-	klog.Info("Reconciling blue secret", "secret", req.NamespacedName.String())
+	logger.Info("Starting reconciliation for BlueSecret")
 	err = r.SpokeClient.Get(ctx, req.NamespacedName, &secret)
 	if err != nil {
 		if errors.IsNotFound(err) {
-			klog.Infof("Could not find secret. Ignoring since it must have been deleted")
+			logger.Info("BlueSecret not found, possibly deleted")
 			return ctrl.Result{}, nil
 		}
-		klog.Error("Failed to get secret.", err)
+		logger.Error("Failed to retrieve BlueSecret", "error", err)
 		return ctrl.Result{}, err
 	}
 
+	logger.Info("Successfully retrieved BlueSecret")
 	err = r.syncBlueSecretForRook(ctx, secret)
 	if err != nil {
+		logger.Error("Failed to synchronize BlueSecret", "error", err)
 		return ctrl.Result{}, err
 	}
 
+	logger.Info("Reconciliation complete for BlueSecret")
 	return ctrl.Result{}, nil
 }

addons/green_secret_controller.go

@@ -3,13 +3,13 @@ package addons
 import (
 	"context"
 	"fmt"
+	"log/slog"
 
 	"github.com/red-hat-storage/odf-multicluster-orchestrator/controllers/utils"
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
-	"k8s.io/klog/v2"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/builder"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -24,6 +24,7 @@ type GreenSecretReconciler struct {
 	HubClient        client.Client
 	SpokeClient      client.Client
 	SpokeClusterName string
+	Logger           *slog.Logger
 }
 
 // SetupWithManager sets up the controller with the Manager.
@@ -51,6 +52,8 @@ func (r *GreenSecretReconciler) SetupWithManager(mgr ctrl.Manager) error {
 		},
 	}
 
+	r.Logger.Info("Setting up controller with manager")
+
 	return ctrl.NewControllerManagedBy(mgr).
 		Named("greensecret_controller").
 		Watches(&corev1.Secret{}, &handler.EnqueueRequestForObject{},
@@ -61,26 +64,30 @@ func (r *GreenSecretReconciler) SetupWithManager(mgr ctrl.Manager) error {
 func (r *GreenSecretReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
 	var err error
 	var greenSecret corev1.Secret
+	logger := r.Logger.With("secret", req.NamespacedName.String())
 
-	klog.Info("Reconciling green secret", "secret", req.NamespacedName.String())
+	logger.Info("Reconciling green secret")
 	err = r.HubClient.Get(ctx, req.NamespacedName, &greenSecret)
 	if err != nil {
 		if errors.IsNotFound(err) {
-			klog.Infof("Could not find secret. Ignoring since it must have been deleted")
+			logger.Info("Green secret not found, likely deleted")
 			return ctrl.Result{}, nil
 		}
-		klog.Error("Failed to get secret.", err)
+		logger.Error("Failed to retrieve green secret", "error", err)
 		return ctrl.Result{}, err
 	}
 
 	if err = validateGreenSecret(greenSecret); err != nil {
-		return ctrl.Result{}, fmt.Errorf("failed to validate secret %q", greenSecret.Name)
+		logger.Error("Validation failed for green secret", "error", err)
+		return ctrl.Result{}, fmt.Errorf("failed to validate green secret %q: %v", greenSecret.Name, err)
 	}
 
 	err = r.syncGreenSecretForRook(ctx, greenSecret)
 	if err != nil {
+		logger.Error("Failed to sync green secret for Rook", "error", err)
 		return ctrl.Result{}, err
 	}
 
+	logger.Info("Successfully reconciled and synced green secret")
 	return ctrl.Result{}, nil
 }