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GCP Professional Cloud Architect Practice Question

Your company has a 2-Gbps Dedicated Interconnect and Cloud Router providing private connectivity between its on-premises data center and a Google Cloud VPC. A new micro-services platform will run on Google Kubernetes Engine and must allow on-premises applications to initiate TCP sessions directly to individual Pods in the cluster over their internal IP addresses. The platform team must also be able to grow the cluster to 5,000 nodes without running into VPC custom route-table limits or adding per-node routes. Which GKE networking design should you recommend?

  • Create a VPC-native GKE cluster but enable IP-masquerade for all destinations so Pods use their node's primary IP when talking to on-premises systems.

  • Create a routes-based GKE cluster and add a static custom route in the VPC for each node's PodCIDR so on-premises networks can reach the Pods directly.

  • Create a VPC-native GKE cluster that uses secondary IP ranges for Pods and Services, and configure Cloud Router to export those secondary ranges over the Interconnect.

  • Create a routes-based GKE cluster and expose every service through an internal TCP/UDP load balancer whose VIPs are advertised to on-premises by Cloud Router.

GCP Professional Cloud Architect
Managing and provisioning a solution infrastructure
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