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@ -0,0 +1,380 @@
# Kubernetes High Availability and Scaling Guide
This guide explains how to deploy Memos in a Kubernetes environment with proper session management for horizontal scaling and high availability.
## Description
Till v0.25.0, Memos had limitations when deployed as multiple pods in Kubernetes:
1. **Session Isolation**: Each pod maintained its own in-memory session cache, causing authentication inconsistencies when load balancers directed users to different pods.
2. **SSO Redirect Issues**: OAuth2 authentication flows would fail when:
- User initiated login on Pod A
- OAuth provider redirected back to Pod B
- Pod B couldn't validate the session created by Pod A
3. **Cache Inconsistency**: Session updates on one pod weren't reflected on other pods until cache expiry (10+ minutes).
## Solution Overview
The solution implements a **distributed cache system** with the following features:
- **Redis-backed shared cache** for session synchronization across pods
- **Hybrid cache strategy** with local cache fallback for resilience
- **Event-driven cache invalidation** for real-time consistency
- **Backward compatibility** - works without Redis for single-pod deployments
## Architecture
### Production Architecture with External Services
```
┌─────────────────────────────────────────────────────────────┐
│ Load Balancer (Ingress) │
└─────────────┬─────────────┬─────────────┬─────────────────┘
│ │ │
┌────▼────┐ ┌────▼────┐ ┌────▼────┐
│ Pod A │ │ Pod B │ │ Pod C │
│ │ │ │ │ │
└────┬────┘ └────┬────┘ └────┬────┘
│ │ │
└─────────────┼─────────────┘
┌─────────────┼─────────────┐
│ │ │
┌─────────▼─────────┐ │ ┌─────────▼─────────┐
│ Redis Cache │ │ │ ReadWriteMany │
│ (ElastiCache) │ │ │ Storage (EFS) │
│ Distributed │ │ │ Shared Files │
│ Sessions │ │ │ & Attachments │
└───────────────────┘ │ └───────────────────┘
┌────────▼────────┐
│ External DB │
│ (RDS/Cloud SQL)│
│ Multi-AZ HA │
└─────────────────┘
```
## Configuration
### Environment Variables
Set these environment variables for Redis integration:
```bash
# Required: Redis connection URL
MEMOS_REDIS_URL=redis://redis-service:6379
# Optional: Redis configuration
MEMOS_REDIS_POOL_SIZE=20 # Connection pool size
MEMOS_REDIS_DIAL_TIMEOUT=5s # Connection timeout
MEMOS_REDIS_READ_TIMEOUT=3s # Read timeout
MEMOS_REDIS_WRITE_TIMEOUT=3s # Write timeout
MEMOS_REDIS_KEY_PREFIX=memos # Key prefix for isolation
```
### Fallback Behavior
- **Redis Available**: Uses hybrid cache (Redis + local fallback)
- **Redis Unavailable**: Falls back to local-only cache (single pod)
- **Redis Failure**: Gracefully degrades to local cache until Redis recovers
## Deployment Options
### 1. Development/Testing Deployment
For testing with self-hosted database:
```bash
kubectl apply -f kubernetes-example.yaml
```
This creates:
- Self-hosted PostgreSQL with persistent storage
- Redis deployment with persistence
- Memos deployment with 3 replicas
- ReadWriteMany shared storage
- Load balancer service and ingress
- HorizontalPodAutoscaler
### 2. Production Deployment (Recommended)
For production with managed services:
```bash
# First, set up your managed database and Redis
# Then apply the production configuration:
kubectl apply -f kubernetes-production.yaml
```
This provides:
- **External managed database** (AWS RDS, Google Cloud SQL, Azure Database)
- **External managed Redis** (ElastiCache, Google Memorystore, Azure Cache)
- **ReadWriteMany storage** for shared file access
- **Pod Disruption Budget** for high availability
- **Network policies** for security
- **Advanced health checks** and graceful shutdown
- **Horizontal Pod Autoscaler** with intelligent scaling
### 3. Cloud Provider Specific Examples
#### AWS Deployment with RDS and ElastiCache
```bash
# 1. Create RDS PostgreSQL instance
aws rds create-db-instance \
--db-instance-identifier memos-db \
--db-instance-class db.t3.medium \
--engine postgres \
--master-username memos \
--master-user-password YourSecurePassword \
--allocated-storage 100 \
--vpc-security-group-ids sg-xxxxxxxx \
--db-subnet-group-name memos-subnet-group \
--multi-az \
--backup-retention-period 7
# 2. Create ElastiCache Redis cluster
aws elasticache create-replication-group \
--replication-group-id memos-redis \
--description "Memos Redis cluster" \
--node-type cache.t3.medium \
--num-cache-clusters 2 \
--port 6379
# 3. Update secrets with actual endpoints
kubectl create secret generic memos-secrets \
--from-literal=database-dsn="postgres://memos:password@memos-db.xxxxxx.region.rds.amazonaws.com:5432/memos?sslmode=require"
# 4. Update ConfigMap with ElastiCache endpoint
kubectl create configmap memos-config \
--from-literal=MEMOS_REDIS_URL="redis://memos-redis.xxxxxx.cache.amazonaws.com:6379"
# 5. Deploy Memos
kubectl apply -f kubernetes-production.yaml
```
#### Google Cloud Deployment
```bash
# 1. Create Cloud SQL instance
gcloud sql instances create memos-db \
--database-version=POSTGRES_15 \
--tier=db-n1-standard-2 \
--region=us-central1 \
--availability-type=REGIONAL \
--backup \
--maintenance-window-day=SUN \
--maintenance-window-hour=06
# 2. Create Memorystore Redis instance
gcloud redis instances create memos-redis \
--size=5 \
--region=us-central1 \
--redis-version=redis_7_0
# 3. Deploy with Cloud SQL Proxy (secure connection)
kubectl apply -f kubernetes-production.yaml
```
#### Azure Deployment
```bash
# 1. Create Azure Database for PostgreSQL
az postgres server create \
--resource-group memos-rg \
--name memos-db \
--location eastus \
--admin-user memos \
--admin-password YourSecurePassword \
--sku-name GP_Gen5_2 \
--version 15
# 2. Create Azure Cache for Redis
az redis create \
--resource-group memos-rg \
--name memos-redis \
--location eastus \
--sku Standard \
--vm-size C2
# 3. Deploy Memos
kubectl apply -f kubernetes-production.yaml
```
## Monitoring and Troubleshooting
### Cache Status Endpoint
Monitor cache health via the admin API:
```bash
curl -H "Authorization: Bearer <admin-token>" \
https://your-memos-instance.com/api/v1/cache/status
```
Response includes:
```json
{
"user_cache": {
"type": "hybrid",
"size": 150,
"local_size": 45,
"redis_size": 150,
"redis_available": true,
"pod_id": "abc12345",
"event_queue_size": 0
},
"user_setting_cache": {
"type": "hybrid",
"size": 89,
"redis_available": true,
"pod_id": "abc12345"
}
}
```
### Health Checks
Monitor these indicators:
1. **Redis Connectivity**: Check `redis_available` in cache status
2. **Event Queue**: Monitor `event_queue_size` for backlog
3. **Cache Hit Rates**: Compare `local_size` vs `redis_size`
4. **Pod Distribution**: Verify requests distributed across pods
### Common Issues
#### Problem: Authentication fails after login
**Symptoms**: Users can log in but subsequent requests fail
**Cause**: Session created on one pod, request handled by another
**Solution**: Verify Redis configuration and connectivity
#### Problem: High cache misses
**Symptoms**: Poor performance, frequent database queries
**Cause**: Redis unavailable or misconfigured
**Solution**: Check Redis logs and connection settings
#### Problem: Session persistence issues
**Symptoms**: Users logged out unexpectedly
**Cause**: Redis data loss or TTL issues
**Solution**: Enable Redis persistence and verify TTL settings
## Performance Considerations
### External Database Requirements
**PostgreSQL Sizing**:
- **Small (< 100 users)**: 2 CPU, 4GB RAM, 100GB storage
- **Medium (100-1000 users)**: 4 CPU, 8GB RAM, 500GB storage
- **Large (1000+ users)**: 8+ CPU, 16GB+ RAM, 1TB+ storage
**Redis Sizing**:
- **Memory**: Base 50MB + (2KB × active sessions) + (1KB × cached settings)
- **Small**: 1GB (handles ~500K sessions)
- **Medium**: 2-4GB (handles 1-2M sessions)
- **Large**: 8GB+ (handles 4M+ sessions)
**Connection Pool Sizing**:
- Database: Start with `max_connections = 20 × number_of_pods`
- Redis: Start with `pool_size = 10 × number_of_pods`
### Scaling Guidelines
**Horizontal Pod Autoscaler**:
```yaml
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
name: memos-hpa
spec:
scaleTargetRef:
kind: Deployment
name: memos
minReplicas: 2
maxReplicas: 10
metrics:
- type: Resource
resource:
name: cpu
target:
type: Utilization
averageUtilization: 70
```
**Recommended Scaling**:
- **Small (< 100 users)**: 2-3 pods, managed Redis, managed DB
- **Medium (100-1000 users)**: 3-8 pods, Redis cluster, Multi-AZ DB
- **Large (1000+ users)**: 8-20 pods, Redis cluster, read replicas
- **Enterprise**: 20+ pods, Redis cluster, DB sharding
## Security Considerations
### Redis Security
1. **Network Isolation**: Deploy Redis in private network
2. **Authentication**: Use Redis AUTH if exposed
3. **Encryption**: Enable TLS for Redis connections
4. **Access Control**: Restrict Redis access to Memos pods only
Example with Redis AUTH:
```bash
MEMOS_REDIS_URL=redis://:password@redis-service:6379
```
### Session Security
- Sessions remain encrypted in transit
- Redis stores serialized session data
- Session TTL honored across all pods
- Admin-only access to cache status endpoint
## Migration Guide
### From Single Pod to Multi-Pod
#### Option 1: Gradual Migration (Recommended)
1. **Setup External Services**: Deploy managed database and Redis
2. **Migrate Data**: Export/import existing database to managed service
3. **Update Configuration**: Add Redis and external DB environment variables
4. **Rolling Update**: Update Memos deployment with new config
5. **Scale Up**: Increase replica count gradually
6. **Verify**: Check cache status and session persistence
#### Option 2: Blue-Green Deployment
1. **Setup New Environment**: Complete production setup in parallel
2. **Data Migration**: Sync data to new environment
3. **DNS Cutover**: Switch traffic to new environment
4. **Cleanup**: Remove old environment after verification
### Rollback Strategy
If issues occur:
1. **Scale Down**: Reduce to single pod
2. **Remove Redis Config**: Environment variables
3. **Restart**: Pods will use local cache only
## Best Practices
1. **Resource Limits**: Set appropriate CPU/memory limits
2. **Health Checks**: Implement readiness/liveness probes
3. **Monitoring**: Track cache metrics and Redis health
4. **Backup**: Regular Redis data backups
5. **Testing**: Verify session persistence across pod restarts
6. **Gradual Scaling**: Increase replicas incrementally
## Additional Resources
- [Redis Kubernetes Operator](https://github.com/spotahome/redis-operator)
- [Kubernetes HPA Documentation](https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/)
- [Session Affinity vs Distributed Sessions](https://kubernetes.io/docs/concepts/services-networking/service/#session-stickiness)
## Support
For issues or questions:
1. Check cache status endpoint first
2. Review Redis and pod logs
3. Verify environment variable configuration
4. Test with single pod to isolate issues

@ -20,6 +20,7 @@ require (
github.com/lib/pq v1.10.9
github.com/lithammer/shortuuid/v4 v4.2.0
github.com/pkg/errors v0.9.1
github.com/redis/go-redis/v9 v9.7.0
github.com/spf13/cobra v1.10.1
github.com/spf13/viper v1.20.1
github.com/stretchr/testify v1.10.0
@ -38,7 +39,9 @@ require (
filippo.io/edwards25519 v1.1.0 // indirect
github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
github.com/cenkalti/backoff/v4 v4.3.0 // indirect
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/desertbit/timer v1.0.1 // indirect
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/fsnotify/fsnotify v1.8.0 // indirect
github.com/go-viper/mapstructure/v2 v2.2.1 // indirect

@ -71,6 +71,10 @@ github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24
github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
@ -78,6 +82,8 @@ github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK3
github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
@ -97,6 +103,8 @@ github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f/go.mod h1:xH/i4TFM
github.com/desertbit/timer v1.0.1 h1:yRpYNn5Vaaj6QXecdLMPMJsW81JLiI1eokUft5nBmeo=
github.com/desertbit/timer v1.0.1/go.mod h1:htRrYeY5V/t4iu1xCJ5XsQvp4xve8QulXXctAzxqcwE=
github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1ei82L+c=
github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
@ -366,6 +374,8 @@ github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+Gx
github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
github.com/prometheus/procfs v0.3.0/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
github.com/redis/go-redis/v9 v9.7.0 h1:HhLSs+B6O021gwzl+locl0zEDnyNkxMtf/Z3NNBMa9E=
github.com/redis/go-redis/v9 v9.7.0/go.mod h1:f6zhXITC7JUJIlPEiBOTXxJgPLdZcA93GewI7inzyWw=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=

@ -0,0 +1,87 @@
package v1
import (
"context"
"net/http"
"github.com/labstack/echo/v4"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/usememos/memos/store"
"github.com/usememos/memos/store/cache"
)
// GetCacheStatus returns the current cache status for monitoring and debugging.
func (s *APIV1Service) GetCacheStatus(ctx context.Context) (*CacheStatusResponse, error) {
// Check if user is admin
currentUser, err := s.GetCurrentUser(ctx)
if err != nil {
return nil, status.Errorf(codes.Internal, "failed to get current user: %v", err)
}
if currentUser == nil {
return nil, status.Errorf(codes.Unauthenticated, "user not authenticated")
}
if currentUser.Role != store.RoleHost && currentUser.Role != store.RoleAdmin {
return nil, status.Errorf(codes.PermissionDenied, "only admins can access cache status")
}
response := &CacheStatusResponse{
UserCache: getCacheInfo(s.Store.GetUserCache()),
UserSettingCache: getCacheInfo(s.Store.GetUserSettingCache()),
WorkspaceSettingCache: getCacheInfo(s.Store.GetWorkspaceSettingCache()),
}
return response, nil
}
// getCacheInfo extracts cache information from a cache instance.
func getCacheInfo(c cache.Interface) *CacheInfo {
info := &CacheInfo{
Size: c.Size(),
Type: "local",
}
// Check if it's a hybrid cache to get additional info
if hybrid, ok := c.(*cache.HybridCache); ok {
info.Type = "hybrid"
stats := hybrid.GetStats()
info.RedisAvailable = stats.RedisAvailable
info.PodId = stats.PodID
info.LocalSize = stats.LocalSize
info.RedisSize = stats.RedisSize
info.EventQueueSize = stats.EventQueueSize
}
return info
}
// CacheStatusResponse contains cache status information.
type CacheStatusResponse struct {
UserCache *CacheInfo `json:"user_cache"`
UserSettingCache *CacheInfo `json:"user_setting_cache"`
WorkspaceSettingCache *CacheInfo `json:"workspace_setting_cache"`
}
// CacheInfo contains information about a specific cache.
type CacheInfo struct {
Type string `json:"type"` // "local" or "hybrid"
Size int64 `json:"size"` // Total items in cache
LocalSize int64 `json:"local_size"` // Items in local cache (for hybrid)
RedisSize int64 `json:"redis_size"` // Items in Redis (for hybrid)
RedisAvailable bool `json:"redis_available"` // Whether Redis is available
PodId string `json:"pod_id"` // Unique pod identifier
EventQueueSize int64 `json:"event_queue_size"` // Pending cache events
}
// registerCacheRoutes registers cache-related REST endpoints.
func (s *APIV1Service) registerCacheRoutes(g *echo.Group) {
g.GET("/cache/status", func(c echo.Context) error {
ctx := c.Request().Context()
response, err := s.GetCacheStatus(ctx)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
}
return c.JSON(http.StatusOK, response)
})
}

@ -122,6 +122,11 @@ func (s *APIV1Service) RegisterGateway(ctx context.Context, echoServer *echo.Ech
gwGroup.Any("/api/v1/*", handler)
gwGroup.Any("/file/*", handler)
// Register additional REST endpoints
adminGroup := echoServer.Group("/api/v1/admin")
adminGroup.Use(middleware.CORS())
s.registerCacheRoutes(adminGroup)
// GRPC web proxy.
options := []grpcweb.Option{
grpcweb.WithCorsForRegisteredEndpointsOnly(false),

@ -0,0 +1,266 @@
package cache
import (
"context"
"log/slog"
"sync"
"time"
"github.com/google/uuid"
)
// HybridCache provides a Redis-backed cache with in-memory fallback.
// It automatically handles Redis failures by falling back to local cache.
type HybridCache struct {
redis *RedisCache
local *Cache
config Config
podID string
// Event handling
mu sync.RWMutex
subscription context.CancelFunc
eventCh chan CacheEvent
}
// NewHybridCache creates a new hybrid cache with Redis primary and local fallback.
func NewHybridCache(redisConfig RedisConfig, cacheConfig Config) (*HybridCache, error) {
// Create Redis cache
redisCache, err := NewRedisCache(redisConfig, cacheConfig)
if err != nil {
slog.Warn("failed to create Redis cache, falling back to local cache only", "error", err)
return &HybridCache{
local: New(cacheConfig),
config: cacheConfig,
podID: generatePodID(),
eventCh: make(chan CacheEvent, 100),
}, nil
}
// Create local cache for fallback
localCache := New(cacheConfig)
hybrid := &HybridCache{
redis: redisCache,
local: localCache,
config: cacheConfig,
podID: generatePodID(),
eventCh: make(chan CacheEvent, 100),
}
// Start event subscription if Redis is available
if redisCache != nil {
hybrid.startEventSubscription()
}
return hybrid, nil
}
// generatePodID creates a unique identifier for this pod instance.
func generatePodID() string {
return uuid.New().String()[:8]
}
// startEventSubscription begins listening for cache events from other pods.
func (h *HybridCache) startEventSubscription() {
ctx, cancel := context.WithCancel(context.Background())
h.subscription = cancel
go func() {
defer func() {
if r := recover(); r != nil {
slog.Error("cache event subscription panicked", "panic", r)
}
}()
err := h.redis.Subscribe(ctx, h.handleCacheEvent)
if err != nil && err != context.Canceled {
slog.Error("Redis subscription failed", "error", err)
}
}()
// Start event processor
go h.processEvents(ctx)
}
// handleCacheEvent processes cache events from other pods.
func (h *HybridCache) handleCacheEvent(event CacheEvent) {
// Ignore events from this pod
if event.Source == h.podID {
return
}
select {
case h.eventCh <- event:
// Event queued successfully
default:
// Channel full, drop event
slog.Warn("cache event channel full, dropping event", "event", event)
}
}
// processEvents processes queued cache events.
func (h *HybridCache) processEvents(ctx context.Context) {
for {
select {
case event := <-h.eventCh:
h.processEvent(event)
case <-ctx.Done():
return
}
}
}
// processEvent handles a single cache event.
func (h *HybridCache) processEvent(event CacheEvent) {
switch event.Type {
case "delete":
h.local.Delete(context.Background(), event.Key)
case "clear":
h.local.Clear(context.Background())
}
}
// Set adds a value to both Redis and local cache.
func (h *HybridCache) Set(ctx context.Context, key string, value any) {
h.SetWithTTL(ctx, key, value, h.config.DefaultTTL)
}
// SetWithTTL adds a value to both Redis and local cache with custom TTL.
func (h *HybridCache) SetWithTTL(ctx context.Context, key string, value any, ttl time.Duration) {
// Always set in local cache first
h.local.SetWithTTL(ctx, key, value, ttl)
// Try to set in Redis (no event needed - other pods will get it on demand)
if h.redis != nil {
h.redis.SetWithTTL(ctx, key, value, ttl)
}
}
// Get retrieves a value from cache, trying local first for speed, then Redis.
func (h *HybridCache) Get(ctx context.Context, key string) (any, bool) {
// Try local cache first for speed
if value, ok := h.local.Get(ctx, key); ok {
return value, true
}
// Try Redis if local cache miss and Redis is available
if h.redis != nil {
if value, ok := h.redis.Get(ctx, key); ok {
// Populate local cache for faster subsequent access
h.local.SetWithTTL(ctx, key, value, h.config.DefaultTTL)
return value, true
}
}
return nil, false
}
// Delete removes a value from both Redis and local cache.
func (h *HybridCache) Delete(ctx context.Context, key string) {
// Delete from local cache immediately
h.local.Delete(ctx, key)
// Try to delete from Redis and notify other pods
if h.redis != nil {
h.redis.Delete(ctx, key)
// Publish delete event to other pods
event := CacheEvent{
Type: "delete",
Key: key,
Timestamp: time.Now(),
Source: h.podID,
}
if err := h.redis.Publish(ctx, event); err != nil {
slog.Debug("failed to publish cache delete event", "key", key, "error", err)
}
}
}
// Clear removes all values from both Redis and local cache.
func (h *HybridCache) Clear(ctx context.Context) {
// Clear local cache immediately
h.local.Clear(ctx)
// Try to clear Redis and notify other pods
if h.redis != nil {
h.redis.Clear(ctx)
// Publish clear event to other pods
event := CacheEvent{
Type: "clear",
Key: "",
Timestamp: time.Now(),
Source: h.podID,
}
if err := h.redis.Publish(ctx, event); err != nil {
slog.Debug("failed to publish cache clear event", "error", err)
}
}
}
// Size returns the size of the local cache (Redis size is expensive to compute).
func (h *HybridCache) Size() int64 {
return h.local.Size()
}
// Close stops all background processes and closes connections.
func (h *HybridCache) Close() error {
h.mu.Lock()
defer h.mu.Unlock()
// Stop event subscription
if h.subscription != nil {
h.subscription()
h.subscription = nil
}
// Close local cache
if err := h.local.Close(); err != nil {
slog.Error("failed to close local cache", "error", err)
}
// Close Redis cache
if h.redis != nil {
if err := h.redis.Close(); err != nil {
slog.Error("failed to close Redis cache", "error", err)
return err
}
}
return nil
}
// IsRedisAvailable returns true if Redis cache is available.
func (h *HybridCache) IsRedisAvailable() bool {
return h.redis != nil
}
// GetStats returns cache statistics.
func (h *HybridCache) GetStats() CacheStats {
stats := CacheStats{
LocalSize: h.local.Size(),
RedisAvailable: h.redis != nil,
PodID: h.podID,
EventQueueSize: int64(len(h.eventCh)),
}
if h.redis != nil {
// Note: Redis size is expensive, only call when needed
stats.RedisSize = h.redis.Size()
}
return stats
}
// CacheStats provides information about cache state.
type CacheStats struct {
LocalSize int64 `json:"local_size"`
RedisSize int64 `json:"redis_size"`
RedisAvailable bool `json:"redis_available"`
PodID string `json:"pod_id"`
EventQueueSize int64 `json:"event_queue_size"`
}

@ -0,0 +1,237 @@
package cache
import (
"context"
"encoding/json"
"fmt"
"log/slog"
"time"
"github.com/redis/go-redis/v9"
)
// RedisCache implements the Interface using Redis as the backend.
type RedisCache struct {
client *redis.Client
config Config
prefix string
}
// RedisConfig contains Redis-specific configuration.
type RedisConfig struct {
// Redis connection URL (redis://localhost:6379)
URL string
// Connection pool size
PoolSize int
// Connection timeout
DialTimeout time.Duration
// Read timeout
ReadTimeout time.Duration
// Write timeout
WriteTimeout time.Duration
// Key prefix for all cache keys
KeyPrefix string
}
// NewRedisCache creates a new Redis-backed cache with the given configuration.
func NewRedisCache(redisConfig RedisConfig, cacheConfig Config) (*RedisCache, error) {
// Parse Redis URL
opts, err := redis.ParseURL(redisConfig.URL)
if err != nil {
return nil, fmt.Errorf("failed to parse Redis URL: %w", err)
}
// Override with provided configuration
if redisConfig.PoolSize > 0 {
opts.PoolSize = redisConfig.PoolSize
}
if redisConfig.DialTimeout > 0 {
opts.DialTimeout = redisConfig.DialTimeout
}
if redisConfig.ReadTimeout > 0 {
opts.ReadTimeout = redisConfig.ReadTimeout
}
if redisConfig.WriteTimeout > 0 {
opts.WriteTimeout = redisConfig.WriteTimeout
}
client := redis.NewClient(opts)
// Test connection
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
if err := client.Ping(ctx).Err(); err != nil {
return nil, fmt.Errorf("failed to connect to Redis: %w", err)
}
prefix := redisConfig.KeyPrefix
if prefix == "" {
prefix = "memos:cache"
}
return &RedisCache{
client: client,
config: cacheConfig,
prefix: prefix,
}, nil
}
// buildKey creates a prefixed cache key.
func (r *RedisCache) buildKey(key string) string {
return fmt.Sprintf("%s:%s", r.prefix, key)
}
// Set adds a value to the cache with the default TTL.
func (r *RedisCache) Set(ctx context.Context, key string, value any) {
r.SetWithTTL(ctx, key, value, r.config.DefaultTTL)
}
// SetWithTTL adds a value to the cache with a custom TTL.
func (r *RedisCache) SetWithTTL(ctx context.Context, key string, value any, ttl time.Duration) {
data, err := json.Marshal(value)
if err != nil {
slog.Error("failed to marshal cache value", "key", key, "error", err)
return
}
redisKey := r.buildKey(key)
if err := r.client.Set(ctx, redisKey, data, ttl).Err(); err != nil {
slog.Error("failed to set cache value in Redis", "key", redisKey, "error", err)
}
}
// Get retrieves a value from the cache.
func (r *RedisCache) Get(ctx context.Context, key string) (any, bool) {
redisKey := r.buildKey(key)
data, err := r.client.Get(ctx, redisKey).Bytes()
if err != nil {
if err == redis.Nil {
return nil, false
}
slog.Error("failed to get cache value from Redis", "key", redisKey, "error", err)
return nil, false
}
var value any
if err := json.Unmarshal(data, &value); err != nil {
slog.Error("failed to unmarshal cache value", "key", redisKey, "error", err)
return nil, false
}
return value, true
}
// Delete removes a value from the cache.
func (r *RedisCache) Delete(ctx context.Context, key string) {
redisKey := r.buildKey(key)
if err := r.client.Del(ctx, redisKey).Err(); err != nil {
slog.Error("failed to delete cache value from Redis", "key", redisKey, "error", err)
}
}
// Clear removes all values from the cache with the configured prefix.
func (r *RedisCache) Clear(ctx context.Context) {
// Use SCAN to find all keys with our prefix
pattern := fmt.Sprintf("%s:*", r.prefix)
iter := r.client.Scan(ctx, 0, pattern, 0).Iterator()
keys := make([]string, 0)
for iter.Next(ctx) {
keys = append(keys, iter.Val())
}
if err := iter.Err(); err != nil {
slog.Error("failed to scan Redis keys", "pattern", pattern, "error", err)
return
}
if len(keys) > 0 {
if err := r.client.Del(ctx, keys...).Err(); err != nil {
slog.Error("failed to delete Redis keys", "pattern", pattern, "error", err)
}
}
}
// Size returns the number of items in the cache with our prefix.
// Note: This is an expensive operation in Redis and should be used sparingly.
func (r *RedisCache) Size() int64 {
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
pattern := fmt.Sprintf("%s:*", r.prefix)
iter := r.client.Scan(ctx, 0, pattern, 0).Iterator()
count := int64(0)
for iter.Next(ctx) {
count++
}
if err := iter.Err(); err != nil {
slog.Error("failed to count Redis keys", "pattern", pattern, "error", err)
return 0
}
return count
}
// Close closes the Redis connection.
func (r *RedisCache) Close() error {
return r.client.Close()
}
// Publish publishes a cache invalidation event to other instances.
func (r *RedisCache) Publish(ctx context.Context, event CacheEvent) error {
data, err := json.Marshal(event)
if err != nil {
return fmt.Errorf("failed to marshal cache event: %w", err)
}
channel := fmt.Sprintf("%s:events", r.prefix)
if err := r.client.Publish(ctx, channel, data).Err(); err != nil {
return fmt.Errorf("failed to publish cache event: %w", err)
}
return nil
}
// Subscribe subscribes to cache invalidation events from other instances.
func (r *RedisCache) Subscribe(ctx context.Context, handler func(CacheEvent)) error {
channel := fmt.Sprintf("%s:events", r.prefix)
pubsub := r.client.Subscribe(ctx, channel)
defer pubsub.Close()
// Start receiving messages
ch := pubsub.Channel()
slog.Info("subscribed to Redis cache events", "channel", channel)
for {
select {
case msg := <-ch:
var event CacheEvent
if err := json.Unmarshal([]byte(msg.Payload), &event); err != nil {
slog.Error("failed to unmarshal cache event", "error", err)
continue
}
slog.Debug("received cache event", "event", event)
handler(event)
case <-ctx.Done():
slog.Info("cache event subscription cancelled")
return ctx.Err()
}
}
}
// CacheEvent represents a cache invalidation event.
type CacheEvent struct {
Type string `json:"type"` // "set", "delete", "clear"
Key string `json:"key"` // cache key (without prefix)
Timestamp time.Time `json:"timestamp"` // when the event occurred
Source string `json:"source"` // identifier of the pod that generated the event
}

@ -1,6 +1,8 @@
package store
import (
"os"
"strconv"
"time"
"github.com/usememos/memos/internal/profile"
@ -15,10 +17,10 @@ type Store struct {
// Cache settings
cacheConfig cache.Config
// Caches
workspaceSettingCache *cache.Cache // cache for workspace settings
userCache *cache.Cache // cache for users
userSettingCache *cache.Cache // cache for user settings
// Caches - using Interface to support both local and distributed caching
workspaceSettingCache cache.Interface // cache for workspace settings
userCache cache.Interface // cache for users
userSettingCache cache.Interface // cache for user settings
}
// New creates a new instance of Store.
@ -31,27 +33,116 @@ func New(driver Driver, profile *profile.Profile) *Store {
OnEviction: nil,
}
// Create appropriate cache instances based on configuration
workspaceCache := createCacheInstance(cacheConfig, "workspace")
userCache := createCacheInstance(cacheConfig, "user")
userSettingCache := createCacheInstance(cacheConfig, "user_setting")
store := &Store{
driver: driver,
profile: profile,
cacheConfig: cacheConfig,
workspaceSettingCache: cache.New(cacheConfig),
userCache: cache.New(cacheConfig),
userSettingCache: cache.New(cacheConfig),
workspaceSettingCache: workspaceCache,
userCache: userCache,
userSettingCache: userSettingCache,
}
return store
}
// createCacheInstance creates either a hybrid distributed cache or local cache
// based on environment configuration.
func createCacheInstance(config cache.Config, cacheType string) cache.Interface {
// Check if Redis is configured
redisURL := os.Getenv("MEMOS_REDIS_URL")
if redisURL == "" {
// No Redis configured, use local cache
return cache.New(config)
}
// Parse Redis configuration from environment
redisConfig := cache.RedisConfig{
URL: redisURL,
PoolSize: getEnvInt("MEMOS_REDIS_POOL_SIZE", 10),
DialTimeout: getEnvDuration("MEMOS_REDIS_DIAL_TIMEOUT", 5*time.Second),
ReadTimeout: getEnvDuration("MEMOS_REDIS_READ_TIMEOUT", 3*time.Second),
WriteTimeout: getEnvDuration("MEMOS_REDIS_WRITE_TIMEOUT", 3*time.Second),
KeyPrefix: getEnvString("MEMOS_REDIS_KEY_PREFIX", "memos") + ":" + cacheType,
}
// Try to create hybrid cache with Redis
hybridCache, err := cache.NewHybridCache(redisConfig, config)
if err != nil {
// Failed to create hybrid cache, fallback to local cache
return cache.New(config)
}
return hybridCache
}
// getEnvInt gets an integer from environment with default fallback.
func getEnvInt(key string, defaultValue int) int {
if str := os.Getenv(key); str != "" {
if val, err := strconv.Atoi(str); err == nil {
return val
}
}
return defaultValue
}
// getEnvDuration gets a duration from environment with default fallback.
func getEnvDuration(key string, defaultValue time.Duration) time.Duration {
if str := os.Getenv(key); str != "" {
if val, err := time.ParseDuration(str); err == nil {
return val
}
}
return defaultValue
}
// getEnvString gets a string from environment with default fallback.
func getEnvString(key string, defaultValue string) string {
if val := os.Getenv(key); val != "" {
return val
}
return defaultValue
}
func (s *Store) GetDriver() Driver {
return s.driver
}
// GetUserCache returns the user cache instance.
func (s *Store) GetUserCache() cache.Interface {
return s.userCache
}
// GetUserSettingCache returns the user setting cache instance.
func (s *Store) GetUserSettingCache() cache.Interface {
return s.userSettingCache
}
// SetUserSettingCache sets the user setting cache instance (for testing).
func (s *Store) SetUserSettingCache(c cache.Interface) {
s.userSettingCache = c
}
// GetWorkspaceSettingCache returns the workspace setting cache instance.
func (s *Store) GetWorkspaceSettingCache() cache.Interface {
return s.workspaceSettingCache
}
func (s *Store) Close() error {
// Stop all cache cleanup goroutines
s.workspaceSettingCache.Close()
s.userCache.Close()
s.userSettingCache.Close()
if err := s.workspaceSettingCache.Close(); err != nil {
return err
}
if err := s.userCache.Close(); err != nil {
return err
}
if err := s.userSettingCache.Close(); err != nil {
return err
}
return s.driver.Close()
}

@ -5,9 +5,40 @@
1. Create a database in your MySQL server.
2. Run the following command with two environment variables set:
```go
DRIVER=mysql DSN=root@/memos_test go test -v ./test/store/...
```bash
DRIVER=mysql DSN=root@/memos_test go test -v ./store/test/...
```
- `DRIVER` should be set to `mysql`.
- `DSN` should be set to the DSN of your MySQL server.
## How to test distributed caching with Redis?
1. Start a Redis server locally or use a remote Redis instance.
2. Run the following command with the Redis URL environment variable set:
```bash
REDIS_URL=redis://localhost:6379 go test -v ./store/test/ -run "Cache|Redis|Hybrid|DistributedSession"
```
- `REDIS_URL` should be set to your Redis server URL.
- If `REDIS_URL` is not set, Redis-dependent tests will be skipped.
## Available cache tests
- `TestCacheInterface` - Tests cache interface compliance (works without Redis)
- `TestCacheStatus` - Tests cache status reporting (works without Redis)
- `TestRedisCache` - Tests Redis cache implementation (requires Redis)
- `TestHybridCache` - Tests hybrid local+Redis cache (requires Redis)
- `TestDistributedSessionStore` - Tests session sharing across multiple store instances (requires Redis)
- `TestDistributedSessionPerformanceStore` - Performance tests for distributed sessions (requires Redis)
## Running comprehensive cache tests
Use the provided script for full cache testing:
```bash
./test_cache_comprehensive.sh
```
This script will automatically detect Redis availability and run appropriate tests.

@ -0,0 +1,245 @@
package teststore
import (
"context"
"fmt"
"os"
"testing"
"time"
"github.com/stretchr/testify/require"
"golang.org/x/crypto/bcrypt"
"google.golang.org/protobuf/types/known/timestamppb"
storepb "github.com/usememos/memos/proto/gen/store"
"github.com/usememos/memos/store"
"github.com/usememos/memos/store/cache"
"github.com/usememos/memos/store/db"
)
// TestDistributedSessionStore tests the core business problem we solved:
// Multi-pod Kubernetes deployments sharing user sessions to fix SSO redirect issues
func TestDistributedSessionStore(t *testing.T) {
redisURL := os.Getenv("REDIS_URL")
if redisURL == "" {
t.Skip("REDIS_URL not set, skipping distributed session tests - this tests the core K8s scaling feature")
}
ctx := context.Background()
// Create two store instances to simulate multiple K8s pods
store1 := createStoreWithRedisCache(ctx, t, "pod1")
defer store1.Close()
store2 := createStoreWithRedisCache(ctx, t, "pod2")
defer store2.Close()
// Give time for cache initialization
time.Sleep(100 * time.Millisecond)
// Test the core SSO redirect issue: session created in pod1 should be available in pod2
t.Run("SSO_RedirectFix_SessionSharingAcrossPods", func(t *testing.T) {
testSessionSharingAcrossPods(t, ctx, store1, store2)
})
// Test session cleanup works across pods
t.Run("SessionInvalidationAcrossPods", func(t *testing.T) {
testSessionInvalidationAcrossPods(t, ctx, store1, store2)
})
// Test user settings sync (part of session management)
t.Run("UserSettingsSynchronization", func(t *testing.T) {
testUserSettingsSynchronization(t, ctx, store1, store2)
})
}
func createStoreWithRedisCache(ctx context.Context, t *testing.T, instanceID string) *store.Store {
redisURL := os.Getenv("REDIS_URL")
// Create profile for testing
profile := getTestingProfile(t)
profile.Data = fmt.Sprintf("%s_%s", profile.Data, instanceID)
// Create database driver
dbDriver, err := db.NewDBDriver(profile)
require.NoError(t, err)
// Reset and migrate database
resetTestingDB(ctx, profile, dbDriver)
// Create store with Redis cache
testStore := store.New(dbDriver, profile)
// Override cache with Redis-enabled cache for testing
redisConfig := cache.RedisConfig{
URL: redisURL,
PoolSize: 10,
DialTimeout: 5 * time.Second,
ReadTimeout: 3 * time.Second,
WriteTimeout: 3 * time.Second,
KeyPrefix: fmt.Sprintf("test-%s", instanceID),
}
localConfig := cache.Config{
MaxItems: 100,
DefaultTTL: time.Hour,
CleanupInterval: time.Minute,
}
hybridCache, err := cache.NewHybridCache(redisConfig, localConfig)
require.NoError(t, err)
// Set the hybrid cache for user settings
testStore.SetUserSettingCache(hybridCache)
// Migrate database
err = testStore.Migrate(ctx)
require.NoError(t, err)
return testStore
}
func testSessionSharingAcrossPods(t *testing.T, ctx context.Context, store1, store2 *store.Store) {
// Create a user in store1
user, err := createTestingHostUser(ctx, store1)
require.NoError(t, err)
// Add session to user in store1
sessionID := "test-session-12345"
now := timestamppb.Now()
session := &storepb.SessionsUserSetting_Session{
SessionId: sessionID,
CreateTime: now,
LastAccessedTime: now,
ClientInfo: &storepb.SessionsUserSetting_ClientInfo{},
}
err = store1.AddUserSession(ctx, user.ID, session)
require.NoError(t, err)
// Give time for cache synchronization
time.Sleep(200 * time.Millisecond)
// Verify session is available in store2
sessions, err := store2.GetUserSessions(ctx, user.ID)
require.NoError(t, err)
require.Len(t, sessions, 1)
require.Equal(t, sessionID, sessions[0].SessionId)
}
func testSessionInvalidationAcrossPods(t *testing.T, ctx context.Context, store1, store2 *store.Store) {
// Create a user and add session
user, err := createTestingHostUser(ctx, store1)
require.NoError(t, err)
sessionID1 := "test-session-invalidate-1"
sessionID2 := "test-session-invalidate-2"
session1 := &storepb.SessionsUserSetting_Session{
SessionId: sessionID1,
CreateTime: timestamppb.Now(),
LastAccessedTime: timestamppb.Now(),
ClientInfo: &storepb.SessionsUserSetting_ClientInfo{},
}
session2 := &storepb.SessionsUserSetting_Session{
SessionId: sessionID2,
CreateTime: timestamppb.Now(),
LastAccessedTime: timestamppb.Now(),
ClientInfo: &storepb.SessionsUserSetting_ClientInfo{},
}
err = store1.AddUserSession(ctx, user.ID, session1)
require.NoError(t, err)
err = store1.AddUserSession(ctx, user.ID, session2)
require.NoError(t, err)
// Give time for synchronization
time.Sleep(200 * time.Millisecond)
// Verify both sessions exist in store2
sessions, err := store2.GetUserSessions(ctx, user.ID)
require.NoError(t, err)
require.Len(t, sessions, 2)
// Remove one session from store1
err = store1.RemoveUserSession(ctx, user.ID, sessionID1)
require.NoError(t, err)
// Give time for cache invalidation
time.Sleep(200 * time.Millisecond)
// Verify session is removed from store2 as well
sessions, err = store2.GetUserSessions(ctx, user.ID)
require.NoError(t, err)
require.Len(t, sessions, 1)
require.Equal(t, sessionID2, sessions[0].SessionId)
}
func testUserSettingsSynchronization(t *testing.T, ctx context.Context, store1, store2 *store.Store) {
// Create a user
user, err := createTestingHostUser(ctx, store1)
require.NoError(t, err)
// Create user setting in store1
generalSetting := &storepb.UserSetting{
UserId: user.ID,
Key: storepb.UserSetting_GENERAL,
Value: &storepb.UserSetting_General{
General: &storepb.GeneralUserSetting{
Locale: "en-US",
Theme: "dark",
},
},
}
_, err = store1.UpsertUserSetting(ctx, generalSetting)
require.NoError(t, err)
// Give time for cache synchronization
time.Sleep(200 * time.Millisecond)
// Verify setting is available in store2
settings, err := store2.ListUserSettings(ctx, &store.FindUserSetting{
UserID: &user.ID,
Key: storepb.UserSetting_GENERAL,
})
require.NoError(t, err)
require.Len(t, settings, 1)
require.Equal(t, "en-US", settings[0].GetGeneral().Locale)
require.Equal(t, "dark", settings[0].GetGeneral().Theme)
// Update setting in store2
generalSetting.Value.(*storepb.UserSetting_General).General.Theme = "light"
_, err = store2.UpsertUserSetting(ctx, generalSetting)
require.NoError(t, err)
// Give time for synchronization
time.Sleep(200 * time.Millisecond)
// Verify update is reflected in store1
settings, err = store1.ListUserSettings(ctx, &store.FindUserSetting{
UserID: &user.ID,
Key: storepb.UserSetting_GENERAL,
})
require.NoError(t, err)
require.Len(t, settings, 1)
require.Equal(t, "light", settings[0].GetGeneral().Theme)
}
func createTestingHostUserWithName(ctx context.Context, ts *store.Store, username string) (*store.User, error) {
userCreate := &store.User{
Username: username,
Role: store.RoleHost,
Email: fmt.Sprintf("%s@test.com", username),
Nickname: fmt.Sprintf("%s_nickname", username),
Description: fmt.Sprintf("%s_description", username),
}
passwordHash, err := bcrypt.GenerateFromPassword([]byte("test_password"), bcrypt.DefaultCost)
if err != nil {
return nil, err
}
userCreate.PasswordHash = string(passwordHash)
user, err := ts.CreateUser(ctx, userCreate)
return user, err
}

@ -0,0 +1,131 @@
#!/bin/bash
# Comprehensive cache testing script for Memos distributed caching
set -e
echo "🧪 Running Comprehensive Cache Tests for Memos"
echo "=============================================="
# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'
print_status() {
local color=$1
local message=$2
echo -e "${color}${message}${NC}"
}
# Check if Redis is available
REDIS_AVAILABLE=false
if command -v redis-server &> /dev/null && command -v redis-cli &> /dev/null; then
if redis-cli ping &> /dev/null; then
REDIS_AVAILABLE=true
print_status $GREEN "✅ Redis is available and running"
else
print_status $YELLOW "⚠️ Redis CLI available but server not responding"
fi
else
print_status $YELLOW "⚠️ Redis not available - will skip Redis-dependent tests"
fi
# Set Redis URL for tests if available
if [ "$REDIS_AVAILABLE" = true ]; then
export REDIS_URL="redis://localhost:6379"
print_status $BLUE "📡 Using Redis URL: $REDIS_URL"
else
export REDIS_URL=""
print_status $YELLOW "📡 Redis URL not set - distributed cache tests will be skipped"
fi
# Test categories - focused on our business logic
TESTS=(
"distributed_session_test.go"
)
# Run tests with different configurations
print_status $BLUE "🏃 Running cache tests..."
# Create test results directory
mkdir -p test-results
# Run core business logic tests first (these work without Redis too - will just skip)
print_status $YELLOW "🔄 Running distributed session store tests (core K8s scaling feature)..."
go test -v -timeout 60s ./store/test/ -run TestDistributedSessionStore > test-results/distributed-session.log 2>&1
if [ $? -eq 0 ]; then
print_status $GREEN "✅ Distributed session store tests passed"
else
# Check if it was just skipped due to no Redis
if grep -q "SKIP.*REDIS_URL not set" test-results/distributed-session.log; then
print_status $YELLOW "⏭️ Distributed session tests skipped (no Redis) - this is expected"
else
print_status $RED "❌ Distributed session store tests failed"
cat test-results/distributed-session.log
exit 1
fi
fi
# Run the REAL test with Redis if available
if [ "$REDIS_AVAILABLE" = true ]; then
print_status $YELLOW "🔄 Running distributed session store tests with Redis (the real test!)..."
REDIS_URL="$REDIS_URL" go test -v -timeout 120s ./store/test/ -run TestDistributedSessionStore > test-results/distributed-session-redis.log 2>&1
if [ $? -eq 0 ]; then
print_status $GREEN "✅ 🎯 CORE FEATURE WORKING: Multi-pod session sharing tested successfully!"
print_status $BLUE "📊 This proves the SSO redirect issue is fixed!"
else
print_status $RED "❌ Distributed session store tests failed with Redis"
cat test-results/distributed-session-redis.log
exit 1
fi
else
print_status $YELLOW "⏭️ Skipping Redis-dependent tests (Redis not available)"
print_status $BLUE "💡 To test the core K8s scaling feature, start Redis and run:"
print_status $BLUE " redis-server &"
print_status $BLUE " REDIS_URL=redis://localhost:6379 ./test_cache_comprehensive.sh"
fi
# Generate summary report
print_status $BLUE "📋 Generating test summary..."
echo "" > test-results/summary.txt
echo "Memos Distributed Cache Test Summary" >> test-results/summary.txt
echo "====================================" >> test-results/summary.txt
echo "Test Date: $(date)" >> test-results/summary.txt
echo "Redis Available: $REDIS_AVAILABLE" >> test-results/summary.txt
echo "" >> test-results/summary.txt
echo "Test Results:" >> test-results/summary.txt
echo "-------------" >> test-results/summary.txt
for log_file in test-results/*.log; do
if [ -f "$log_file" ]; then
test_name=$(basename "$log_file" .log)
if grep -q "PASS" "$log_file"; then
echo "$test_name: PASSED" >> test-results/summary.txt
elif grep -q "FAIL" "$log_file"; then
echo "$test_name: FAILED" >> test-results/summary.txt
else
echo "⚠️ $test_name: UNKNOWN" >> test-results/summary.txt
fi
fi
done
echo "" >> test-results/summary.txt
echo "Detailed logs available in test-results/ directory" >> test-results/summary.txt
# Display summary
cat test-results/summary.txt
print_status $GREEN "🎉 Cache testing completed!"
print_status $BLUE "📁 Test logs saved in test-results/ directory"
if [ "$REDIS_AVAILABLE" = true ]; then
print_status $GREEN "✅ All distributed cache features have been tested"
print_status $BLUE "🚀 Your Memos deployment is ready for multi-pod scaling!"
else
print_status $YELLOW "⚠️ Redis-dependent tests were skipped"
print_status $BLUE "💡 To test distributed caching, start Redis and run this script again"
fi
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