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GCP Professional Cloud Architect Practice Question

Your company runs dozens of microservices on private GKE clusters in two regions. You must publish a public partner API that enforces OAuth 2.0 access tokens, blocks malicious JSON payloads, applies per-partner call quotas, and keeps the microservice endpoints completely unreachable from the public internet. You want to minimize code changes in the services and centralize policy management while maintaining high availability across regions. Which architecture best meets these requirements?

  • Deploy Cloud Endpoints with ESPv2 sidecars in every microservice, expose each service through a regional external load balancer, and rely on Cloud Armor rules for quota and threat protection.

  • Configure a regional external HTTP(S) load balancer that sends traffic directly to the GKE Ingress, use network firewall rules for isolation, and add a service mesh filter to validate OAuth tokens.

  • Provision Apigee X in its own project, front it with a global external HTTP(S) load balancer, peer the Apigee runtime VPC to each microservice VPC, and implement OAuth 2.0, Quota, and JSON Threat Protection policies in Apigee.

  • Place an internal TCP load balancer in front of GKE, enable Cloud NAT for egress, and embed custom OAuth and quota middleware inside each microservice.

GCP Professional Cloud Architect
Managing implementation
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