Alerting: Fix logging pointer address of DashboardUID and PanelID variables (#58539)

pkg/services/ngalert/image/service.go

@@ -115,24 +115,26 @@ func NewScreenshotImageServiceFromCfg(cfg *setting.Cfg, db *store.DBstore, ds da
 func (s *ScreenshotImageService) NewImage(ctx context.Context, r *models.AlertRule) (*models.Image, error) {
 	logger := s.logger.FromContext(ctx)
 
-	if r.DashboardUID == nil || *r.DashboardUID == "" {
+	dashboardUID := r.GetDashboardUID()
+	if dashboardUID == "" {
 		logger.Debug("Cannot take screenshot for alert rule as it is not associated with a dashboard")
 		return nil, models.ErrNoDashboard
 	}
 
-	if r.PanelID == nil || *r.PanelID == 0 {
+	panelID := r.GetPanelID()
+	if panelID <= 0 {
 		logger.Debug("Cannot take screenshot for alert rule as it is not associated with a panel")
 		return nil, models.ErrNoPanel
 	}
 
+	logger = logger.New("dashboard", dashboardUID, "panel", panelID)
+
 	opts := screenshot.ScreenshotOptions{
-		DashboardUID: *r.DashboardUID,
-		PanelID:      *r.PanelID,
+		DashboardUID: dashboardUID,
+		PanelID:      panelID,
 		Timeout:      screenshotTimeout,
 	}
 
-	logger = logger.New("dashboard", opts.DashboardUID, "panel", opts.PanelID)
-
 	// To prevent concurrent screenshots of the same dashboard panel we use singleflight,
 	// deduplicated on a base64 hash of the screenshot options.
 	optsHash := base64.StdEncoding.EncodeToString(opts.Hash())

pkg/services/ngalert/models/alert_rule.go

@@ -166,6 +166,22 @@ type AlertRule struct {
 	Labels      map[string]string
 }
 
+// GetDashboardUID returns the DashboardUID or "".
+func (alertRule *AlertRule) GetDashboardUID() string {
+	if alertRule.DashboardUID != nil {
+		return *alertRule.DashboardUID
+	}
+	return ""
+}
+
+// GetPanelID returns the Panel ID or -1.
+func (alertRule *AlertRule) GetPanelID() int64 {
+	if alertRule.PanelID != nil {
+		return *alertRule.PanelID
+	}
+	return -1
+}
+
 type LabelOption func(map[string]string)
 
 func WithoutInternalLabels() LabelOption {

pkg/services/ngalert/state/manager.go

@@ -246,8 +246,8 @@ func (st *Manager) setNextState(ctx context.Context, alertRule *ngModels.AlertRu
 		image, err := takeImage(ctx, st.images, alertRule)
 		if err != nil {
 			logger.Warn("Failed to take an image",
-				"dashboard", alertRule.DashboardUID,
-				"panel", alertRule.PanelID,
+				"dashboard", alertRule.GetDashboardUID(),
+				"panel", alertRule.GetPanelID(),
 				"error", err)
 		} else if image != nil {
 			currentState.Image = image
@@ -373,8 +373,8 @@ func (st *Manager) staleResultsHandler(ctx context.Context, logger log.Logger, r
 				image, err := takeImage(ctx, st.images, r)
 				if err != nil {
 					logger.Warn("Failed to take an image",
-						"dashboard", r.DashboardUID,
-						"panel", r.PanelID,
+						"dashboard", r.GetDashboardUID(),
+						"panel", r.GetPanelID(),
 						"error", err)
 				} else if image != nil {
 					resolvedImage = image