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Difficulty: MediumDesigning Infrastructure for Technical Requirements and High Availability

A telecommunications provider is designing a mission-critical subscriber authentication service on Google Cloud. The architecture must achieve a 99.99% availability SLA. The service processes stateless API requests from mobile base stations and requires a dedicated private hybrid network connection between on-premises core facilities and Google Cloud capable of sustaining a minimum guaranteed bandwidth of 10 Gbps with high availability. Which TWO architectural decisions should you recommend to meet these technical and availability requirements?

  1. Deploy the stateless API backend onto Cloud Run across multiple GCP regions fronted by a Global External Application Load Balancer.Answer
  2. Provision Dedicated Interconnect with redundant connections across two distinct edge availability domains.Answer
  3. C
    Establish HA VPN connections with four active tunnels over the public internet to deliver the required 10 Gbps throughput.
  4. D
    Deploy a multi-zone Google Kubernetes Engine (GKE) cluster in a single region with custom ingress controllers to run the stateless API.
  5. E
    Use Cloud SQL for PostgreSQL with cross-region read replicas configured for manual failover in disaster recovery scenarios.

Answer

The recommended solution is to deploy the stateless backend on multi-region Cloud Run instances behind a Global External Application Load Balancer, and to establish Dedicated Interconnect with redundant circuits across two edge availability domains.
Deploying stateless APIs to multi-region Cloud Run instances fronted by a Global External Application Load Balancer provides seamless global failover and scaling. Dedicated Interconnect configured across redundant edge availability domains guarantees at least 10 Gbps bandwidth and meets the 99.99% connectivity SLA requirement.

Step-by-Step Solution

1
Analyze compute tier high availability requirements for stateless APIs.
Cloud Run across multiple GCP regions paired with Global External Application Load Balancing provides active-active multi-region failover and autoscaling without infrastructure management overhead.
Stateless HTTP microservices achieve higher reliability and lower operational complexity using serverless platforms rather than managing Kubernetes infrastructure.
2
Evaluate hybrid connectivity throughput and SLA requirements.
Dedicated Interconnect with 10 Gbps connections configured across dual edge availability domains satisfies both the high-bandwidth (10 Gbps+) and 99.99% uptime SLA requirements.
HA VPN cannot reliably guarantee 10 Gbps single-connection capacity, whereas Dedicated Interconnect is designed for enterprise high-bandwidth hybrid networking.

Key Concept

High Availability and Hybrid Connectivity Architecture Design
Estimated Time:1m 30s
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Topics

Designing Infrastructure for Technical Requirements and High Availability