fixing storage management dashboard

backend/internal/common/router/cache.go

@@ -6,6 +6,7 @@ import (
 	"encoding/hex"
 	"fmt"
 	"net/http"
+	"strings"
 	"time"
 
 	"github.com/atlasos/calypso/internal/common/cache"
@@ -18,21 +19,21 @@ func GenerateKey(prefix string, parts ...string) string {
 	for _, part := range parts {
 		key += ":" + part
 	}
-	
+
 	// Hash long keys to keep them manageable
 	if len(key) > 200 {
 		hash := sha256.Sum256([]byte(key))
 		return prefix + ":" + hex.EncodeToString(hash[:])
 	}
-	
+
 	return key
 }
 
 // CacheConfig holds cache configuration
 type CacheConfig struct {
-	Enabled     bool
-	DefaultTTL  time.Duration
-	MaxAge      int // seconds for Cache-Control header
+	Enabled    bool
+	DefaultTTL time.Duration
+	MaxAge     int // seconds for Cache-Control header
 }
 
 // cacheMiddleware creates a caching middleware
@@ -74,7 +75,7 @@ func cacheMiddleware(cfg CacheConfig, cache *cache.Cache) gin.HandlerFunc {
 		// Cache miss - capture response
 		writer := &responseWriter{
 			ResponseWriter: c.Writer,
-			body:          &bytes.Buffer{},
+			body:           &bytes.Buffer{},
 		}
 		c.Writer = writer
 
@@ -136,6 +137,9 @@ func cacheControlMiddleware() gin.HandlerFunc {
 		case path == "/api/v1/system/services":
 			// Service list can be cached briefly
 			c.Header("Cache-Control", "public, max-age=60")
+		case strings.HasPrefix(path, "/api/v1/storage/zfs/pools/") && strings.HasSuffix(path, "/datasets"):
+			// ZFS datasets should not be cached - they change frequently
+			c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
 		default:
 			// Default: no cache for other endpoints
 			c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
@@ -168,4 +172,3 @@ func InvalidateCachePattern(cache *cache.Cache, pattern string) {
 		cache.Clear()
 	}
 }
-

backend/internal/common/router/router.go

@@ -4,12 +4,12 @@ import (
 	"context"
 	"time"
 
+	"github.com/atlasos/calypso/internal/audit"
+	"github.com/atlasos/calypso/internal/auth"
 	"github.com/atlasos/calypso/internal/common/cache"
 	"github.com/atlasos/calypso/internal/common/config"
 	"github.com/atlasos/calypso/internal/common/database"
 	"github.com/atlasos/calypso/internal/common/logger"
-	"github.com/atlasos/calypso/internal/audit"
-	"github.com/atlasos/calypso/internal/auth"
 	"github.com/atlasos/calypso/internal/iam"
 	"github.com/atlasos/calypso/internal/monitoring"
 	"github.com/atlasos/calypso/internal/scst"
@@ -44,10 +44,10 @@ func NewRouter(cfg *config.Config, db *database.DB, log *logger.Logger) *gin.Eng
 	r.Use(securityHeadersMiddleware(cfg))
 	r.Use(rateLimitMiddleware(cfg, log))
 	r.Use(corsMiddleware(cfg))
-	
+
 	// Cache control headers (always applied)
 	r.Use(cacheControlMiddleware())
-	
+
 	// Response caching middleware (if enabled)
 	if cfg.Server.Cache.Enabled {
 		cacheConfig := CacheConfig{
@@ -84,7 +84,7 @@ func NewRouter(cfg *config.Config, db *database.DB, log *logger.Logger) *gin.Eng
 
 	// Initialize and start alert rule engine
 	alertRuleEngine := monitoring.NewAlertRuleEngine(db, log, alertService)
-	
+
 	// Register default alert rules
 	alertRuleEngine.RegisterRule(monitoring.NewAlertRule(
 		"storage-capacity-warning",
@@ -160,6 +160,10 @@ func NewRouter(cfg *config.Config, db *database.DB, log *logger.Logger) *gin.Eng
 
 			// Storage
 			storageHandler := storage.NewHandler(db, log)
+			// Pass cache to storage handler for cache invalidation
+			if responseCache != nil {
+				storageHandler.SetCache(responseCache)
+			}
 			storageGroup := protected.Group("/storage")
 			storageGroup.Use(requirePermission("storage", "read"))
 			{
@@ -180,6 +184,8 @@ func NewRouter(cfg *config.Config, db *database.DB, log *logger.Logger) *gin.Eng
 				storageGroup.GET("/zfs/pools/:id/datasets", storageHandler.ListZFSDatasets)
 				storageGroup.POST("/zfs/pools/:id/datasets", requirePermission("storage", "write"), storageHandler.CreateZFSDataset)
 				storageGroup.DELETE("/zfs/pools/:id/datasets/:dataset", requirePermission("storage", "write"), storageHandler.DeleteZFSDataset)
+				// ZFS ARC Stats
+				storageGroup.GET("/zfs/arc/stats", storageHandler.GetARCStats)
 			}
 
 			// SCST
@@ -286,6 +292,3 @@ func ginLogger(log *logger.Logger) gin.HandlerFunc {
 		)
 	}
 }
-
-
-