According to theNKPA 6.10 documentation, licensing in an NKP cluster is constrained by the total number of vCPUs assigned to all nodes (workers and control planes). In this scenario, the cluster has a maximum of 150 vCPUs available.
The existing output shows 10 worker nodes, each with 8 vCPUs (10×8=80 vCPUs) and 3 control plane nodes, each with 4 vCPUs (3×4=12 vCPUs).
Current vCPU usage: 80 + 12 = 92 vCPUs.
Remaining vCPUs: 150 - 92 = 58 vCPUs.
Option A:
Adding 6 control plane nodes (6×4=24 vCPUs).
This would increase control planes to 9 total (3 existing + 6 new). Control plane nodes would consume 9×4=36 vCPUs.
Worker nodes remain at 80 vCPUs.
Total vCPU usage: 36 + 80 = 116 vCPUs (still under 150 vCPUs).
However, it’s unusual and unnecessary to have 9 control planes in a typical NKP setup. NKPA and NCP-CN best practices indicate typically no more than 3 or 5 control planes for HA. Therefore, this is technically possible but not recommended or standard practice. So not selected.
Option B:
Expanding the existing worker nodepool by 8 nodes (8×8=64 vCPUs).
This would add 64 vCPUs to the current 92 vCPUs:
92 + 64 = 156 vCPUs → exceeds licensing limit.
Correction:The question specifies “expand up to 8 nodes,” so it’s possible to expand by only 7 nodes (7×8=56 vCPUs).
92 + 56 = 148 vCPUs → within licensing limits.
Thus, expanding byup to 7 nodesis valid.
Option C:
Creating a new worker nodepool with 10 nodes (10×8=80 vCPUs).
This would add 80 vCPUs to the existing 92 vCPUs:
92 + 80 = 172 vCPUs → exceeds 150 vCPU licensing limit.
Not valid.
Option D:
Expanding the original worker nodepool by up to 4 nodes (4×8=32 vCPUs) = +32 vCPUs.
Adding a new nodepool of 6 nodes with 4 vCPUs/node (6×4=24 vCPUs) = +24 vCPUs.
Total increase: 32 + 24 = 56 vCPUs.
Total vCPU usage: 92 + 56 = 148 vCPUs → within the 150 vCPU limit.
Thus, valid.
Extract Reference:
NKPA 6.10– “Cluster Sizing and Licensing”
Nutanix Kubernetes Platform Administration (NKPA) – Licensing Considerations
"The total number of vCPUs for all nodes (control planes and workers) must not exceed the licensed vCPU capacity of the NKP deployment."
This confirms thatOptions B and Dare the two valid approaches to expand the cluster while remaining compliant with licensing constraints.
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