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DR Networking

Regional

Public services like SNS and S3 operate from all AZs - only region failure would cause service failure

dr-networking-regional

VPC

  • VPC - regionallly resilient along with IGW and VPC Router
    • can withstand AZ failure
    • only fails when region fails
  • Subnet - AZ failure will also cause subnet failure
    • nat gateway fails when AZ fails
  • Interface Endpoint - AZ failure will also cause interface endpoint failure
    • deploy multiple VPCE for regional HA

Load Balancer

  • Consists of LB nodes in 2+ AZs - regionally resilient
    • as long as one node is functional, LB is functional
  • Can withstand AZ failure
    • only fails when entire region fails

Global Network

Route53

  • Global Service
  • Route53 to point to services in mulitple regions provide global discoverability and resilience
    • configuration to not route to unhealhty region (regional health check)