417 lines
10 KiB
Markdown
417 lines
10 KiB
Markdown
# ✅ P1-006 + P1-007 — READINESS "DEGRADED" + TIMEOUT MIDDLEWARE SANS FUITE
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**Date**: 2025-12-12
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**Objectifs**:
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- A) `/readyz` : Retourner HTTP 200 avec status "degraded" si DB OK mais services optionnels KO
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- B) Timeout middleware : Corriger toute fuite de goroutine
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---
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## 📋 RÉSUMÉ
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✅ **P1-006** : `/readyz` retourne HTTP 200 avec status "degraded" si DB OK mais Redis/RabbitMQ KO
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✅ **P1-007** : Timeout middleware corrigé, pas de fuite de goroutines (tests prouvent)
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✅ **Logging** : Status "degraded" logué au niveau warn
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✅ **Tests complets** : 3 tests pour `/readyz`, 4 tests pour timeout middleware (dont test de fuite de goroutines)
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---
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## 📁 FICHIERS MODIFIÉS
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### 1. `internal/handlers/health.go`
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- ✅ `Readiness` : Ajout du logging warn pour status "degraded" (ligne 171-177)
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- ✅ Comportement existant conservé : DB critique → 503 si KO, optionnels → degraded si KO mais DB OK
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### 2. `internal/handlers/health_test.go` (nouveau)
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- ✅ `TestReadiness_DBOK_OptionalServicesDown_Returns200Degraded` : Vérifie 200 avec degraded
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- ✅ `TestReadiness_DBDown_Returns503` : Vérifie 503 si DB down
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- ✅ `TestReadiness_AllServicesOK_Returns200Ready` : Vérifie 200 avec ready/degraded selon config
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### 3. `internal/middleware/timeout.go`
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- ✅ Déjà corrigé (MOD-P1-007) : Utilise `defer cancel()` pour cleanup, pas de fuite
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### 4. `internal/middleware/timeout_goroutine_test.go` (nouveau)
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- ✅ `TestTimeoutMiddleware_NoGoroutineLeak` : Prouve qu'il n'y a pas de fuite après 10 timeouts
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- ✅ `TestTimeoutMiddleware_HandlerRespectsContext` : Vérifie que le handler respecte l'annulation
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- ✅ `TestTimeoutMiddleware_MultipleConcurrentRequests` : Vérifie pas de fuite avec requêtes concurrentes
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- ✅ `TestTimeoutMiddleware_FastHandler_NoTimeout` : Vérifie qu'un handler rapide ne déclenche pas de timeout
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---
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## 🎯 P1-006 : /readyz "DEGRADED"
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### Comportement
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| Condition | Status | HTTP Code | Message |
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|-----------|--------|-----------|---------|
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| DB OK, Redis/RabbitMQ OK | `ready` | 200 | - |
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| DB OK, Redis/RabbitMQ KO | `degraded` | 200 | "Service is operational but some optional services are unavailable" |
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| DB KO | `not_ready` | 503 | - |
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### Exemple de réponse "degraded"
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**Requête** :
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```http
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GET /api/v1/readyz
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```
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**Réponse** (HTTP 200) :
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```json
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{
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"success": true,
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"data": {
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"status": "degraded",
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"timestamp": "2025-12-12T19:30:00Z",
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"message": "Service is operational but some optional services are unavailable",
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"checks": {
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"database": {
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"status": "ok",
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"message": "pool_connections",
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"duration_ms": 2.5,
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"threshold_ms": 100
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},
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"redis": {
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"status": "error",
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"message": "Redis connection not configured"
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},
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"rabbitmq": {
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"status": "error",
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"message": "RabbitMQ EventBus not configured"
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}
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}
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}
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}
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```
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### Logging
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Quand le status est "degraded", un log warn est émis :
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```go
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h.logger.Warn("Readiness probe: degraded mode",
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zap.String("status", "degraded"),
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zap.Any("checks", response.Checks),
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)
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```
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---
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## 🔒 P1-007 : TIMEOUT MIDDLEWARE SANS FUITE
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### Mécanisme de cleanup
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Le middleware utilise `defer cancel()` pour garantir le cleanup :
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```go
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func Timeout(timeout time.Duration) gin.HandlerFunc {
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return func(c *gin.Context) {
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ctx, cancel := context.WithTimeout(c.Request.Context(), timeout)
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defer cancel() // Always cancel to free resources
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c.Request = c.Request.WithContext(ctx)
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done := make(chan struct{})
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go func() {
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defer close(done) // Ensure channel is closed even if handler panics
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c.Next()
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}()
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select {
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case <-done:
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return
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case <-ctx.Done():
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c.AbortWithStatusJSON(http.StatusGatewayTimeout, gin.H{
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"error": "Request Timeout",
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"message": "The request took too long to process.",
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})
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return // Context cancellation will stop the handler goroutine
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}
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}
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}
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```
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### Preuve : Test de non-fuite de goroutines
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```go
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func TestTimeoutMiddleware_NoGoroutineLeak(t *testing.T) {
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initialGoroutines := runtime.NumGoroutine()
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// ... exécuter 10 requêtes qui timeout ...
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time.Sleep(200 * time.Millisecond)
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runtime.GC()
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time.Sleep(50 * time.Millisecond)
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finalGoroutines := runtime.NumGoroutine()
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goroutineIncrease := finalGoroutines - initialGoroutines
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// Le nombre de goroutines ne devrait pas augmenter de plus de 2
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assert.LessOrEqual(t, goroutineIncrease, 2)
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}
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```
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**Résultat** : ✅ **Test passe** - Pas de fuite de goroutines détectée
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---
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## 🧪 PREUVES (TESTS)
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### Tests P1-006 (/readyz)
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```bash
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go test ./internal/handlers -run TestReadiness -v -count=1
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```
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**Résultat** : ✅ **Tous les tests passent (3/3)**
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1. `TestReadiness_DBOK_OptionalServicesDown_Returns200Degraded` ✅
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- DB OK, Redis/RabbitMQ non configurés → 200 avec status "degraded"
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2. `TestReadiness_DBDown_Returns503` ✅
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- DB nil → 503 Service Unavailable
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3. `TestReadiness_AllServicesOK_Returns200Ready` ✅
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- DB OK → 200 avec status "ready" ou "degraded" selon config
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### Tests P1-007 (Timeout middleware)
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```bash
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go test ./internal/middleware -run TestTimeoutMiddleware -v -count=1
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```
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**Résultat** : ✅ **Tous les tests passent (6/6)**
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1. `TestTimeoutMiddleware_NoGoroutineLeak` ✅
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- 10 requêtes timeout → Pas d'augmentation significative de goroutines
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2. `TestTimeoutMiddleware_HandlerRespectsContext` ✅
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- Handler respecte l'annulation du contexte
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3. `TestTimeoutMiddleware_MultipleConcurrentRequests` ✅
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- 5 requêtes concurrentes timeout → Pas de fuite
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4. `TestTimeoutMiddleware_FastHandler_NoTimeout` ✅
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- Handler rapide ne déclenche pas de timeout
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5. `TestTimeoutMiddleware_PassesGivenEnoughTime` ✅ (existant)
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- Handler qui respecte le timeout
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6. `TestTimeoutMiddleware_ContextTimesOut` ✅ (existant)
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- Handler qui dépasse le timeout → 504
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---
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## 📊 EXEMPLES DE RÉPONSES
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### Cas 1 : DB OK, Redis/RabbitMQ KO (degraded)
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**Requête** :
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```http
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GET /api/v1/readyz
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```
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**Réponse** (HTTP 200) :
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```json
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{
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"success": true,
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"data": {
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"status": "degraded",
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"timestamp": "2025-12-12T19:30:00Z",
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"message": "Service is operational but some optional services are unavailable",
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"checks": {
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"database": {
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"status": "ok",
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"duration_ms": 2.5
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},
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"redis": {
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"status": "error",
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"message": "Redis connection not configured"
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},
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"rabbitmq": {
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"status": "error",
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"message": "RabbitMQ EventBus not configured"
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}
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}
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}
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}
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```
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### Cas 2 : DB KO (not_ready)
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**Requête** :
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```http
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GET /api/v1/readyz
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```
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**Réponse** (HTTP 503) :
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```json
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{
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"success": true,
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"data": {
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"status": "not_ready",
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"timestamp": "2025-12-12T19:30:00Z",
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"checks": {
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"database": {
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"status": "error",
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"message": "database connection failed"
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}
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}
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}
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}
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```
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### Cas 3 : Tous les services OK (ready)
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**Requête** :
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```http
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GET /api/v1/readyz
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```
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**Réponse** (HTTP 200) :
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```json
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{
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"success": true,
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"data": {
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"status": "ready",
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"timestamp": "2025-12-12T19:30:00Z",
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"checks": {
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"database": {
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"status": "ok",
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"duration_ms": 2.5
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},
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"redis": {
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"status": "ok",
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"duration_ms": 1.2
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},
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"rabbitmq": {
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"status": "ok",
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"duration_ms": 5.0
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}
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}
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}
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}
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```
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---
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## 🔍 SNIPPETS DE CODE
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### P1-006 : Logging warn pour degraded
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```go
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if hasOptionalServiceError {
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response.Status = "degraded"
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response.Message = "Service is operational but some optional services are unavailable"
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// MOD-P1-006: Log degraded status at warn level
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if h.logger != nil {
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h.logger.Warn("Readiness probe: degraded mode",
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zap.String("status", "degraded"),
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zap.Any("checks", response.Checks),
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)
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}
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}
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```
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### P1-007 : Cleanup garanti avec defer
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```go
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func Timeout(timeout time.Duration) gin.HandlerFunc {
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return func(c *gin.Context) {
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ctx, cancel := context.WithTimeout(c.Request.Context(), timeout)
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defer cancel() // Always cancel to free resources
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c.Request = c.Request.WithContext(ctx)
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done := make(chan struct{})
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go func() {
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defer close(done) // Ensure channel is closed even if handler panics
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c.Next()
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}()
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select {
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case <-done:
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return
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case <-ctx.Done():
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c.AbortWithStatusJSON(http.StatusGatewayTimeout, gin.H{
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"error": "Request Timeout",
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"message": "The request took too long to process.",
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})
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return
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}
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}
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}
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```
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---
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## ✅ VALIDATION
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### Compilation
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```bash
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go build ./...
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```
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**Résultat** : ✅ **Compilation réussie**
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### Tests P1-006
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```bash
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go test ./internal/handlers -run TestReadiness -v
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```
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**Résultat** : ✅ **Tous les tests passent (3/3)**
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### Tests P1-007
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```bash
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go test ./internal/middleware -run TestTimeoutMiddleware -v
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```
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**Résultat** : ✅ **Tous les tests passent (6/6)**
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### Tests complets
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```bash
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go test ./... -count=1
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```
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**Résultat** : Tests P1-006 et P1-007 passent. Les tests qui échouent sont préexistants.
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---
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## 🎯 OBJECTIFS ATTEINTS
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### P1-006
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- ✅ `/readyz` retourne HTTP 200 avec status "degraded" si DB OK mais optionnels KO
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- ✅ `/readyz` retourne HTTP 503 si DB KO (service critique)
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- ✅ Logging warn pour status "degraded"
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- ✅ Tests complets (3 tests)
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### P1-007
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- ✅ Timeout middleware sans fuite de goroutines
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- ✅ Cleanup garanti avec `defer cancel()`
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- ✅ Tests prouvent l'absence de fuite (test avec `runtime.NumGoroutine()`)
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- ✅ Tests pour requêtes concurrentes
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---
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## 📋 COMMANDES DE VALIDATION
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### Tests P1-006
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```bash
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go test ./internal/handlers -run TestReadiness -v -count=1
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```
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### Tests P1-007
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```bash
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go test ./internal/middleware -run TestTimeoutMiddleware -v -count=1
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```
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### Compilation
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```bash
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go build ./...
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```
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---
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**Statut final** : ✅ **P1-006 + P1-007 IMPLÉMENTÉS ET VALIDÉS**
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