Infrastructure & Security

Cloud-Native Architecture

Our VoP (Verification of Payee) service is built on a modern, cloud-native architecture designed for infinite scalability, high availability, and bank-grade security.

Kubernetes Infrastructure

- +

    
flowchart LR
  A([Internet]) --> B([Load Balancer])
  B --> C([WAF])
  C --> D([Envoy])
  D --> E([K8s])
  E --> F([VoP API])
  F --> G([DB])

  subgraph Security
      C
      D
  end

  subgraph App
      F
  end

  subgraph Data
      G
  end

  classDef default fill:#f8fafc,stroke:#64748b,stroke-width:2px
  classDef highlight fill:#dbeafe,stroke:#3b82f6,stroke-width:2px
  classDef security fill:#fee2e2,stroke:#ef4444,stroke-width:2px

  class A,B,E default
  class F,G highlight
  class C,D security

  

Key Components

1. Load Balancing & Traffic Management

   • Global load balancing across multiple regions
   • Automatic failover and disaster recovery
   • Dynamic traffic routing and blue-green deployments

2. Security Layers

   # Envoy Configuration Example
   static_resources:
     listeners:
       - address:
           socket_address:
             address: 0.0.0.0
             port_value: 443
         filter_chains:
           - filters:
               - name: envoy.filters.network.http_connection_manager
                 typed_config:
                   "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager"
                   stat_prefix: ingress_http
                   route_config:
                     name: local_route
                     virtual_hosts:
                       - name: backend
                         domains: ["*"]
                         routes:
                           - match: { prefix: "/" }
                             route: { cluster: vop_service }
                   http_filters:
                     - name: envoy.filters.http.jwt_authn
                     - name: envoy.filters.http.rbac
                     - name: envoy.filters.http.router

Security Architecture

Multi-Layer Security

1. Edge Security

   • Cloudflare WAF protection
   • DDoS mitigation
   • TLS 1.3 encryption
   • Certificate rotation
   • IP allowlisting

2. Service Mesh Security

   • Envoy proxy for mTLS
   • Service-to-service authentication
   • Traffic encryption
   • Rate limiting
   • Circuit breaking

3. Application Security

   • Pod security policies
   • Network policies
   • RBAC
   • Secrets management
   • Container scanning

Observability & Monitoring

Distributed Tracing

# OpenTelemetry Configuration
apiVersion: opentelemetry.io/v1alpha1
kind: OpenTelemetryCollector
metadata:
  name: vop-collector
spec:
  config: |
    receivers:
      otlp:
        protocols:
          grpc:
          http:
    processors:
      batch:
      memory_limiter:
        check_interval: 1s
        limit_mib: 1000
    exporters:
      jaeger:
        endpoint: jaeger-collector:14250
        tls:
          insecure: false
    service:
      pipelines:
        traces:
          receivers: [otlp]
          processors: [memory_limiter, batch]
          exporters: [jaeger]

Monitoring Stack

1. Metrics Collection

   • Prometheus for metrics aggregation
   • Custom banking metrics
   • SLA monitoring
   • Performance metrics

2. Logging

   • ELK Stack integration
   • Structured logging
   • Audit logging
   • Compliance reporting

3. Alerting

   • PagerDuty integration
   • Alert correlation
   • Incident management
   • SLA breach detection

Scalability & High Availability

Horizontal Scaling

# Kubernetes HPA Configuration
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: vop-api
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: vop-api
  minReplicas: 3
  maxReplicas: 100
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 80
  behavior:
    scaleUp:
      stabilizationWindowSeconds: 30
    scaleDown:
      stabilizationWindowSeconds: 300

High Availability Features

1. Multi-Region Deployment

   • Active-active configuration
   • Geographic redundancy
   • Data replication
   • Failover automation

2. Database Clustering

   • Automatic failover
   • Read replicas
   • Backup automation
   • Point-in-time recovery

3. Resilience Patterns

   • Circuit breakers
   • Retry policies
   • Backpressure handling
   • Graceful degradation

Compliance & Audit

Banking Compliance

1. Regulatory Requirements

   • PSD2 compliance
   • GDPR compliance
   • Banking regulations
   • Data protection

2. Audit Trail

   • Immutable audit logs
   • Transaction tracking
   • Access logging
   • Change management

Security Certifications

• ISO 27001
• SOC 2 Type II
• PCI DSS
• Banking industry standards

Disaster Recovery

Business Continuity

1. Backup Strategy

   • Continuous backup
   • Cross-region replication
   • Encrypted backups
   • Regular testing

2. Recovery Plans

   • RTO < 15 minutes
   • RPO < 1 minute
   • Automated recovery
   • Regular DR drills

Performance Metrics

System Performance

• 99.999% uptime SLA
• < 100ms response time
• 100k+ TPS capacity
• Global availability

Scaling Capabilities

• Automatic scaling
• Zero-downtime updates
• Load-based scaling
• Cost optimization

Conclusion

Our infrastructure is designed to meet and exceed the stringent requirements of the banking industry:

• Enterprise-grade security
• Infinite scalability
• High availability
• Complete observability
• Regulatory compliance
• Disaster recovery

This architecture ensures that our VoP service can handle any scale of operation while maintaining the highest levels of security and reliability required by financial institutions.