Add dev-prod parity analysis and recommendations
Analyze current differences between development and production environments and provide three options for improving parity: 1. Conservative: Minimal changes, maximum benefit - 2 replicas for critical services - Resource limits at 50% of prod - Specific CORS origins - Resource impact: +30% RAM 2. High Parity: Maximum similarity - Match all prod replica counts - Production resource limits - Enable SSL and monitoring - Resource impact: +200% RAM 3. Hybrid: Balanced approach - 2 replicas for stateful services - Resources at 60% of prod - Production configs with dev features - Resource impact: +100% RAM Recommendation: Start with Option 1 for best cost/benefit ratio.
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docs/DEV-PROD-PARITY-ANALYSIS.md
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docs/DEV-PROD-PARITY-ANALYSIS.md
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# Dev-Prod Parity Analysis
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## Current Differences Between Dev and Prod
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### 1. **Replicas**
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- **Dev**: 1 replica per service
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- **Prod**: 2-3 replicas per service
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- **Impact**: Multi-replica issues (race conditions, session handling, etc.) won't be caught in dev
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### 2. **Resource Limits**
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- **Dev**: Minimal (64Mi-256Mi RAM, 25m-200m CPU)
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- **Prod**: Not explicitly set (uses defaults from base manifests)
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- **Impact**: Resource exhaustion issues may appear only in prod
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### 3. **Environment Variables**
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- **Dev**: DEBUG=true, LOG_LEVEL=DEBUG, PROFILING_ENABLED=true
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- **Prod**: DEBUG=false, LOG_LEVEL=INFO, PROFILING_ENABLED=false
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- **Impact**: Different code paths, performance characteristics
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### 4. **CORS Configuration**
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- **Dev**: `*` (wildcard, accepts all origins)
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- **Prod**: Specific domains only
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- **Impact**: CORS issues won't be caught in dev
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### 5. **SSL/TLS**
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- **Dev**: HTTP only (ssl-redirect: false)
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- **Prod**: HTTPS required (Let's Encrypt)
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- **Impact**: SSL-related issues not tested in dev
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### 6. **Image Pull Policy**
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- **Dev**: `Never` (uses local images)
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- **Prod**: Default (pulls from registry)
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- **Impact**: Image versioning issues not caught in dev
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### 7. **Storage Class**
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- **Dev**: Uses default Kind storage
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- **Prod**: Uses `microk8s-hostpath`
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- **Impact**: Storage-related differences
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### 8. **Rate Limiting**
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- **Dev**: RATE_LIMIT_ENABLED=false
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- **Prod**: RATE_LIMIT_ENABLED=true
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- **Impact**: Rate limit logic not tested in dev
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## Recommendations for Dev-Prod Parity
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### ✅ What SHOULD Be Aligned
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1. **Resource Limits Structure**
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- Keep dev limits lower, but use same structure
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- Use 50% of prod limits in dev
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- This catches resource issues early
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2. **Critical Environment Variables**
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- Same security settings (password requirements, JWT config)
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- Same timeout values
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- Same business rules
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- Different: DEBUG, LOG_LEVEL (dev needs verbosity)
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3. **Some Replicas for Critical Services**
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- Run 2 replicas of gateway, auth in dev
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- Catches load balancing and state management issues
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- Still saves resources vs prod
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4. **CORS Configuration**
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- Use specific origins in dev (localhost, 127.0.0.1)
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- Catches CORS issues early
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5. **Rate Limiting**
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- Enable in dev with higher limits
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- Tests the code path without being restrictive
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### ⚠️ What SHOULD Stay Different
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1. **Debug Settings**
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- Keep DEBUG=true in dev (needed for development)
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- Keep verbose logging (LOG_LEVEL=DEBUG)
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- Keep profiling enabled
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2. **SSL/TLS**
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- Optional: Can enable self-signed certs in dev
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- But HTTP is simpler for local development
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3. **Image Pull Policy**
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- Keep `Never` in dev (faster iteration)
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- Local builds are essential for dev workflow
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4. **Replica Counts**
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- 1-2 in dev vs 2-3 in prod (balance between parity and resources)
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5. **Monitoring**
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- Optional in dev to save resources
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- Essential in prod
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## Proposed Changes for Better Dev-Prod Parity
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### Option 1: Conservative (Recommended)
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Minimal changes, maximum benefit:
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1. **Increase critical service replicas to 2**
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- gateway: 1 → 2
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- auth-service: 1 → 2
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- Tests load balancing, keeps other services at 1
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2. **Align resource limits structure**
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- Use same resource structure as prod
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- Set to 50% of prod values
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3. **Fix CORS in dev**
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- Use specific origins instead of wildcard
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- Better matches prod behavior
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4. **Enable rate limiting with high limits**
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- Tests the code path
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- Won't interfere with development
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### Option 2: High Parity (More Resources Needed)
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Maximum similarity, higher resource usage:
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1. **Match prod replica counts**
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- Run 2 replicas of all services
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- Requires more RAM (12-16GB)
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2. **Use production resource limits**
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- Helps catch OOM issues early
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- Requires powerful development machine
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3. **Enable SSL in dev**
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- Use self-signed certs
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- Matches prod HTTPS behavior
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4. **Enable all production features**
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- Monitoring, tracing, etc.
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### Option 3: Hybrid (Best Balance)
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Balance between parity and development speed:
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1. **2 replicas for stateful/critical services**
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- gateway, auth, tenant, orders: 2 replicas
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- Others: 1 replica
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2. **Resource limits at 60% of prod**
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- Catches issues without being restrictive
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3. **Production-like configuration**
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- Same CORS policy (with dev domains)
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- Rate limiting enabled (higher limits)
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- Same security settings
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4. **Keep dev-friendly features**
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- DEBUG=true
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- Verbose logging
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- Hot reload
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- HTTP (no SSL)
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## Impact Analysis
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### Resource Usage Comparison
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**Current Dev Setup:**
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- ~20 pods running
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- ~2-3GB RAM
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- ~1-2 CPU cores
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**Option 1 (Conservative):**
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- ~22 pods (2 extra replicas)
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- ~3-4GB RAM (+30%)
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- ~1.5-2.5 CPU cores
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**Option 2 (High Parity):**
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- ~40 pods (double)
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- ~8-10GB RAM (+200%)
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- ~4-5 CPU cores
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**Option 3 (Hybrid):**
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- ~28 pods
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- ~5-6GB RAM (+100%)
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- ~2-3 CPU cores
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### Benefits of Increased Parity
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1. **Catch Multi-Instance Issues**
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- Race conditions
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- Distributed locks
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- Session management
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- Load balancing problems
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2. **Resource Issues Found Early**
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- Memory leaks
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- OOM errors
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- CPU bottlenecks
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3. **Configuration Validation**
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- CORS issues
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- Rate limiting bugs
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- Security misconfigurations
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4. **Deployment Confidence**
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- Fewer surprises in production
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- Better testing
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- Reduced rollbacks
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### Tradeoffs
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**Pros:**
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- ✅ Catches more issues before production
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- ✅ More realistic testing environment
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- ✅ Better confidence in deployments
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- ✅ Team learns production behavior
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**Cons:**
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- ❌ Higher resource requirements
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- ❌ Slower startup times
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- ❌ More complex troubleshooting
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- ❌ Longer rebuild cycles
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## Implementation Guide
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If you want to proceed with **Option 1 (Conservative)**, I can:
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1. Update dev kustomization to run 2 replicas of critical services
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2. Add resource limits that mirror prod structure (at 50%)
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3. Fix CORS to use specific origins
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4. Enable rate limiting with dev-friendly limits
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5. Create a "dev-high-parity" profile for those who want closer matching
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Would you like me to implement these changes?
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