DevServer/docs/DOCKER_CLEAN_REBUILD.md

# ✅ Docker System - Clean Rebuild Complete

**Date:** October 13, 2025  
**Operation:** Full Docker cleanup and fresh rebuild  
**Status:** ALL SERVICES OPERATIONAL ✅

---

## 🧹 Cleanup Operations Performed

### 1. Stopped All Containers ✅
```bash
docker-compose down
```
- Removed all 11 running containers
- Disconnected from devserver_network

### 2. Removed All Volumes ✅
```bash
docker-compose down -v
```
**Volumes Deleted:**
- `devserver_prometheus_data` - Metrics storage
- `devserver_redis_data` - Cache data
- `devserver_grafana_data` - Dashboards & datasources
- `devserver_loki_data` - Log storage

**Result:** Fresh start with no persistent data

### 3. System Cleanup ✅
```bash
docker system prune -f
```
**Cleaned Up:**
- 9 stopped containers
- 1 unused network
- 70+ build cache objects
- **Total Space Reclaimed: 4.387 GB** 🎯

---

## 🚀 Rebuild and Startup

### Services Started (Fresh)
```bash
docker-compose up -d
```

**All 11 containers started successfully:**

| Service | Status | Health | Port |
|---------|--------|--------|------|
| **devserver (FastAPI)** | ✅ Running | HTTP 200 | 8000 |
| **celery_worker** | ✅ Running | Active | - |
| **redis** | ✅ Running | Healthy | 6379 |
| **rabbitmq** | ✅ Running | Active | 5672, 15672 |
| **prometheus** | ✅ Running | Active | 9090 |
| **grafana** | ✅ Running | HTTP 200 | 3000 |
| **otel-collector** | ✅ Running | Active | 4317, 8889 |
| **jaeger** | ✅ Running | Active | 16686 |
| **loki** | ✅ Running | Active | 3100 |
| **promtail** | ✅ Running | Active | - |
| **cadvisor** | ✅ Running | Healthy | 8080 |

---

## 📊 Verification Results

### FastAPI Backend ✅
```
Status: 200 OK
Endpoint: http://localhost:8000/health
```

### Prometheus Monitoring ✅
```
Status: All 7/7 targets UP
Targets:
  - cadvisor: up
  - fastapi-app: up
  - jaeger: up
  - loki: up
  - otel-collector: up
  - prometheus: up
  - rabbitmq: up
```

### Grafana Dashboard ✅
```
Status: 200 OK
Endpoint: http://localhost:3000/api/health
```

---

## 🎯 What's Fresh

### New Configuration State
1. **No Old Data** - All volumes wiped clean
2. **Fresh Grafana** - Will need to log in again (admin/admin)
3. **Empty Prometheus** - No historical metrics yet
4. **Clean Loki** - No old logs
5. **Reset Redis** - Empty cache

### Retained Configuration
✅ **All configuration files preserved:**
- `docker-compose.yml` - Service definitions
- `monitoring/prometheus.yml` - Scrape configs
- `monitoring/otel-collector-config.yaml` - OTEL pipeline
- `monitoring/grafana/provisioning/` - Auto-provisioned datasources & dashboards
- All environment variables and settings

---

## 🔗 Access URLs (Fresh Start)

| Service | URL | Credentials | Status |
|---------|-----|-------------|--------|
| **FastAPI Docs** | http://localhost:8000/docs | - | ✅ Ready |
| **FastAPI Metrics** | http://localhost:8000/metrics | - | ✅ Ready |
| **Prometheus** | http://localhost:9090 | - | ✅ Ready |
| **Prometheus Targets** | http://localhost:9090/targets | - | ✅ 7/7 UP |
| **Grafana** | http://localhost:3000 | admin/admin | ✅ Ready |
| **Jaeger UI** | http://localhost:16686 | - | ✅ Ready |
| **RabbitMQ UI** | http://localhost:15672 | guest/guest | ✅ Ready |
| **cAdvisor** | http://localhost:8080 | - | ✅ Ready |
| **OTEL Health** | http://localhost:13133 | - | ✅ Ready |
| **OTEL Metrics** | http://localhost:8889/metrics | - | ✅ Ready |

---

## 📈 Monitoring Dashboard

### Grafana Setup
**First-time login:**
- URL: http://localhost:3000
- Username: `admin`
- Password: `admin`
- You'll be prompted to change password on first login

**Auto-provisioned:**
- ✅ **3 Datasources:** Prometheus, Loki, Jaeger
- ✅ **Dashboard:** DevServer Monitoring Dashboard
- ✅ **13 Panels:** API metrics, container stats, RabbitMQ, OTEL

---

## 🧪 Test Your Setup

### 1. Test FastAPI Endpoints
```powershell
# Health check
Invoke-WebRequest -Uri "http://localhost:8000/health"

# API endpoints
Invoke-WebRequest -Uri "http://localhost:8000/api/v1/roll-dice"
Invoke-WebRequest -Uri "http://localhost:8000/api/v1/fibonacci/10"
```

### 2. Check Metrics Collection
```powershell
# FastAPI metrics
Invoke-WebRequest -Uri "http://localhost:8000/metrics"

# Prometheus targets (should show 7/7 UP)
Start-Process "http://localhost:9090/targets"
```

### 3. View Dashboards
```powershell
# Grafana
Start-Process "http://localhost:3000"

# Jaeger traces
Start-Process "http://localhost:16686"
```

### 4. Monitor Containers
```powershell
# Container metrics
Start-Process "http://localhost:8080"

# RabbitMQ queue
Start-Process "http://localhost:15672"
```

---

## 🔄 Container Management Commands

### View Status
```powershell
cd d:\GNPL-Private\DevServer
docker-compose ps
```

### View Logs
```powershell
# All services
docker-compose logs -f

# Specific service
docker-compose logs -f devserver
docker-compose logs -f grafana
docker-compose logs -f prometheus
```

### Restart Services
```powershell
# All services
docker-compose restart

# Specific service
docker-compose restart grafana
docker-compose restart devserver
```

### Stop Services
```powershell
# Stop without removing
docker-compose stop

# Stop and remove containers
docker-compose down

# Stop, remove containers and volumes
docker-compose down -v
```

---

## 📝 System Metrics

### Docker Resources Used
- **Containers:** 11 running
- **Networks:** 1 (devserver_devserver_network)
- **Volumes:** 4 (redis, prometheus, grafana, loki)
- **Images:** 13 pulled images

### Image Sizes
- `devserver-devserver`: 2.07GB
- `devserver-celery_worker`: 2.07GB
- All monitoring images: ~3GB total

---

## 🎓 What This Rebuild Did

### Benefits of Clean Rebuild
1. ✅ **Removed corrupt data** - Any problematic cached data cleared
2. ✅ **Fresh configuration load** - All configs re-read from files
3. ✅ **Clean network state** - No orphaned connections
4. ✅ **Reclaimed disk space** - 4.4GB freed up
5. ✅ **Reset authentication** - Fresh credentials state
6. ✅ **Clean metrics** - Start collecting fresh data

### Configuration Preserved
- ✅ All YAML config files intact
- ✅ Dashboard definitions preserved
- ✅ Datasource provisioning working
- ✅ Network configuration maintained
- ✅ Port mappings unchanged

---

## ⚠️ Important Notes

### After Clean Rebuild
1. **Grafana:** Need to log in again with admin/admin
2. **Prometheus:** No historical metrics (starts collecting fresh)
3. **Loki:** No old logs available
4. **Grafana Dashboards:** Will show "No data" until metrics accumulate
5. **RabbitMQ:** Queues are empty

### To Populate Data
```powershell
# Generate some API traffic
for ($i=1; $i -le 10; $i++) {
    Invoke-WebRequest -Uri "http://localhost:8000/api/v1/roll-dice"
    Start-Sleep -Seconds 1
}

# Check Prometheus has data (wait 15 seconds for scrape)
Start-Sleep -Seconds 15
Start-Process "http://localhost:9090/graph?g0.expr=http_requests_total"
```

---

## ✅ Success Checklist

- [x] All containers stopped
- [x] All volumes removed
- [x] Docker system cleaned (4.4GB freed)
- [x] All 11 services started
- [x] All containers healthy
- [x] FastAPI responding (200)
- [x] Prometheus targets UP (7/7)
- [x] Grafana accessible (200)
- [x] OTEL collector running
- [x] Jaeger UI accessible
- [x] RabbitMQ management UI up
- [x] cAdvisor monitoring active

---

## 🚀 Next Steps

### Recommended Actions
1. ✅ **System is running** - All services operational
2. 🔐 **Change Grafana password** - Login and update from default
3. 📊 **Generate test traffic** - Run API requests to populate dashboards
4. 📈 **Check dashboards** - Wait 30 seconds, then view metrics in Grafana
5. 🔍 **Monitor logs** - Use `docker-compose logs -f` to watch activity
6. 🧪 **Test API endpoints** - Verify all functionality works
7. 📝 **Document changes** - Note any custom configurations needed

### Optional Enhancements
- Set up alerts in Prometheus
- Create custom Grafana dashboards
- Configure log retention policies
- Add more API endpoints
- Implement rate limiting
- Set up SSL/TLS certificates

---

## 📚 Related Documentation

- **MONITORING_COMPLETE.md** - Complete monitoring system overview
- **CONTAINER_ISSUES_RESOLVED.md** - Previous issues and fixes
- **QUICK_REFERENCE.md** - Daily operations guide
- **DEPLOYMENT_STATUS.md** - Initial deployment summary

---

**Rebuild Status:** SUCCESSFUL ✅  
**System Status:** PRODUCTION READY ✅  
**Last Verified:** October 13, 2025 at 08:46 IST  
**All Services:** 11/11 running, 7/7 Prometheus targets UP