Google Professional Cloud Network Engineer Question 33
Select 3Google Cloud PlatformYour organization is planning to deploy a new Google Kubernetes Engine (GKE) cluster with a high number of nodes and pods. To ensure proper network planning, which of the following steps should you take to avoid IP address exhaustion and ensure connectivity to the GKE control plane?
- A
Allocate a sufficiently large secondary IP range for the pods in the VPC.
- B
Reserve a separate private IP range for GKE control plane communication.
- C
Enable VPC-native (alias IP) routing for the cluster.
- D
Configure a Cloud NAT for outbound internet access from the pods.
- E
Use a single large CIDR block for both the pods and services IP ranges.
Show answer and explanation
Correct answers: A, C, D
Explanation
Proper IP planning is critical for GKE clusters, especially for large-scale deployments. Allocating sufficient secondary ranges for pods, enabling VPC-native routing, and configuring Cloud NAT for outbound internet access are all essential to ensure the cluster can scale and function properly. Reserving a private range for the control plane is unnecessary in most cases, and using separate CIDR blocks for pods and services is a best practice to avoid conflicts.
- A. Correct.
Correct: Allocating a large secondary range for pods ensures that the cluster can scale properly without running into IP exhaustion issues. Each pod requires its own IP address from the secondary range.
- B. Incorrect.
Incorrect: The GKE control plane uses public IPs by default, so reserving a private IP range specifically for it is unnecessary. However, private clusters can use private IPs, but that's unrelated to reserving a separate range.
- C. Correct.
Correct: Enabling VPC-native routing ensures that the cluster integrates with the VPC network efficiently using alias IPs, which is necessary for IP management and scalability.
- D. Correct.
Correct: Cloud NAT allows pods without external IPs to access the internet, which is often required for pulling container images or accessing external APIs.
- E. Incorrect.
Incorrect: Using a single large CIDR block for both pods and services IP ranges is not a best practice as it can lead to conflicts and limits scalability. Separate CIDR blocks for pods and services provide better isolation and management.