# Telecom Platform Deployment Guide

This guide provides comprehensive instructions for deploying the Telecom Platform with all infrastructure components including GitOps, multi-environment support, service mesh, backup, logging, secrets management, and compliance.

## Architecture Overview

The Telecom Platform deployment consists of the following components:

### Core Platform Services
- **API Server**: Main REST API service
- **Charging Engine**: Billing and payment processing
- **Packet Gateway**: Network packet processing
- **Web Dashboard**: React-based admin interface

### Infrastructure Components
- **GitOps**: ArgoCD for continuous deployment
- **Service Mesh**: Istio for traffic management and security
- **Monitoring**: Prometheus + Grafana stack
- **Logging**: ELK stack (Elasticsearch, Logstash, Kibana)
- **Backup**: Velero for disaster recovery
- **Secrets**: HashiCorp Vault for secure secret management
- **Certificates**: cert-manager for automated TLS
- **Compliance**: GDPR compliance framework
- **Autoscaling**: HPA and VPA for dynamic scaling

## Prerequisites

### Kubernetes Cluster
- Kubernetes 1.24+ with RBAC enabled
- Minimum 8 CPU cores, 32GB RAM for production
- Storage class provisioned (e.g., standard, gp2)

### Required Tools
- kubectl 1.24+
- helm 3.8+
- argocd CLI (optional)
- vault CLI (optional)

### External Dependencies
- S3 bucket for backups
- Domain names for TLS certificates
- Email for Let's Encrypt certificates

## Deployment Steps

### 1. Install Infrastructure Components

#### 1.1 Install Istio Service Mesh
```bash
# Install Istio
kubectl apply -f deployments/istio/istio-install.yaml

# Wait for Istio to be ready
kubectl wait --for=condition=ready pod -l app=istio-ingressgateway -n istio-system --timeout=300s
```

#### 1.2 Install Cert-Manager
```bash
# Install cert-manager
kubectl apply -f deployments/cert-manager/cert-manager-install.yaml

# Wait for cert-manager to be ready
kubectl wait --for=condition=ready pod -l app.kubernetes.io/name=cert-manager -n cert-manager --timeout=300s
```

#### 1.3 Install HashiCorp Vault
```bash
# Install Vault
kubectl apply -f deployments/vault/vault-install.yaml

# Initialize Vault
kubectl apply -f deployments/vault/vault-secrets-config.yaml

# Wait for Vault to be ready
kubectl wait --for=condition=ready pod -l app.kubernetes.io/name=vault -n vault --timeout=300s
```

#### 1.4 Install ELK Stack
```bash
# Install Elasticsearch
kubectl apply -f deployments/elk-stack/elasticsearch.yaml

# Wait for Elasticsearch to be ready
kubectl wait --for=condition=ready pod -l app.kubernetes.io/name=elasticsearch -n elasticsearch --timeout=600s

# Install Logstash
kubectl apply -f deployments/elk-stack/logstash.yaml

# Install Kibana
kubectl apply -f deployments/elk-stack/kibana.yaml
```

#### 1.5 Install Velero for Backup
```bash
# Install Velero
kubectl apply -f deployments/backup/velero-install.yaml

# Configure AWS credentials (update with your actual credentials)
kubectl patch secret velero-aws-credentials -n velero --patch '{"data":{"cloud":"[base64-encoded-aws-credentials]"}}'
```

#### 1.6 Install ArgoCD
```bash
# Install ArgoCD
kubectl apply -f deployments/argocd/argocd-install.yaml

# Wait for ArgoCD to be ready
kubectl wait --for=condition=ready pod -l app.kubernetes.io/name=argocd -n argocd --timeout=300s
```

### 2. Deploy Platform Services

#### 2.1 Deploy Core Services
```bash
# Deploy namespace and core services
kubectl apply -f deployments/kubernetes/00-namespace.yaml
kubectl apply -f deployments/kubernetes/01-mongodb.yaml
kubectl apply -f deployments/kubernetes/02-redis.yaml
kubectl apply -f deployments/kubernetes/03-api-server.yaml
kubectl apply -f deployments/kubernetes/04-charging-engine.yaml
kubectl apply -f deployments/kubernetes/05-packet-gateway.yaml
kubectl apply -f deployments/kubernetes/06-web-dashboard.yaml
```

#### 2.2 Deploy Monitoring Stack
```bash
# Deploy monitoring components
kubectl apply -f deployments/kubernetes/monitoring/
```

#### 2.3 Deploy Ingress and Gateway
```bash
# Deploy Istio gateway
kubectl apply -f deployments/istio/telecom-platform-gateway.yaml
```

### 3. Configure GitOps

#### 3.1 Apply ArgoCD Applications
```bash
# Deploy ArgoCD applications
kubectl apply -f deployments/argocd/argocd-app-of-apps.yaml
kubectl apply -f deployments/argocd/apps/
```

#### 3.2 Configure ArgoCD Access
```bash
# Get ArgoCD admin password
kubectl get secret argocd-initial-admin-secret -n argocd -o jsonpath='{.data.password}' | base64 -d

# Port forward to ArgoCD UI
kubectl port-forward svc/argocd-server -n argocd 8080:443
```

### 4. Configure Autoscaling
```bash
# Deploy HPA and VPA configurations
kubectl apply -f deployments/autoscaling/hpa.yaml
kubectl apply -f deployments/autoscaling/vpa.yaml
```

### 5. Configure Compliance
```bash
# Deploy GDPR compliance
kubectl apply -f deployments/gdpr/gdpr-compliance.yaml
```

### 6. Configure Certificates
```bash
# Deploy certificate configurations
kubectl apply -f deployments/cert-manager/certificates.yaml
```

## Multi-Environment Deployment

### Development Environment
```bash
# Deploy to dev environment
kubectl apply -k deployments/environments/dev
```

### Staging Environment
```bash
# Deploy to staging environment
kubectl apply -k deployments/environments/staging
```

### Production Environment
```bash
# Deploy to production environment
kubectl apply -k deployments/environments/prod
```

## Monitoring and Observability

### Access Grafana
```bash
# Port forward to Grafana
kubectl port-forward svc/grafana -n monitoring 3000:3000

# Default credentials: admin/admin
```

### Access Kibana
```bash
# Port forward to Kibana
kubectl port-forward svc/kibana -n elasticsearch 5601:5601
```

### Access Prometheus
```bash
# Port forward to Prometheus
kubectl port-forward svc/prometheus -n monitoring 9090:9090
```

## Backup and Recovery

### Manual Backup
```bash
# Create manual backup
kubectl create backup telecom-platform-manual-$(date +%Y%m%d) \
  --from-namespaces=telecom-platform \
  --include-cluster-resources=true \
  --storage-location=default \
  --wait
```

### Restore from Backup
```bash
# Restore from backup
kubectl create restore telecom-platform-restore \
  --from-backup=telecom-platform-manual-20231201 \
  --include-namespaces=telecom-platform \
  --wait
```

## Security Configuration

### Vault Secrets Management
```bash
# Access Vault UI
kubectl port-forward svc/vault -n vault 8200:8200

# Login with root token (from initialization)
vault login <root-token>

# Add new secrets
vault kv put kv/telecom-platform/database url="postgresql://user:pass@postgres:5432/db"
```

### Certificate Management
```bash
# Check certificate status
kubectl get certificates -n telecom-platform

# Renew certificates (automatic with cert-manager)
kubectl annotate certificate telecom-platform-tls cert-manager.io/renew=true -n telecom-platform
```

## Troubleshooting

### Common Issues

#### Pod Not Starting
```bash
# Check pod status and logs
kubectl describe pod <pod-name> -n <namespace>
kubectl logs <pod-name> -n <namespace>
```

#### Service Not Accessible
```bash
# Check service and endpoints
kubectl get svc -n <namespace>
kubectl get endpoints -n <namespace>

# Check Istio configuration
kubectl get virtualservices -n <namespace>
kubectl get gateways -n <namespace>
```

#### Certificate Issues
```bash
# Check certificate status
kubectl describe certificate <cert-name> -n <namespace>
kubectl get certificate <cert-name> -n <namespace> -o yaml
```

#### Backup Issues
```bash
# Check Velero status
kubectl get backups -n velero
kubectl describe backup <backup-name> -n velero
```

### Performance Tuning

#### Resource Limits
- Adjust CPU/memory limits based on actual usage
- Monitor HPA/VPA recommendations
- Consider node affinity for critical services

#### Database Optimization
- Configure connection pooling
- Enable query caching
- Set up read replicas for scaling

#### Logging Optimization
- Configure log retention policies
- Implement log sampling for high-volume services
- Use structured logging format

## Security Best Practices

### Network Security
- Use Istio mTLS for service-to-service communication
- Implement network policies
- Regularly review security group rules

### Secrets Management
- Rotate secrets regularly
- Use Vault for dynamic secrets
- Enable audit logging for secret access

### Compliance
- Regular GDPR compliance audits
- Data retention policy enforcement
- Privacy by design principles

## Maintenance

### Regular Tasks
- Weekly: Review backup status
- Monthly: Update certificates and secrets
- Quarterly: Security audit and compliance review
- Annually: Disaster recovery testing

### Scaling Considerations
- Monitor resource utilization
- Plan for peak traffic patterns
- Implement auto-scaling policies
- Consider multi-region deployment

## Support

For issues and questions:
1. Check the troubleshooting section
2. Review logs and metrics
3. Consult the documentation
4. Contact the platform team

## Version History

- v1.0.0: Initial deployment with core services
- v1.1.0: Added Istio service mesh
- v1.2.0: Added ELK stack logging
- v1.3.0: Added Vault secrets management
- v1.4.0: Added GDPR compliance
- v1.5.0: Added auto-scaling and monitoring