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I have already allocated 3 VPS for an initial multiple timezone cluster.

  • 12 single-core vCPUs
  • ≈50 GB RAM
  • ≈1TB SSD storage
  • 1 EST,1 CST,& 1 PST

Before I jump in however, I would like to know if there are there any major differences in resource usage between leader and contributor nodes?

ie:

  • Do leader nodes hold containers/replicas or simply orchestrate the contributor nodes (thus saving storage in ratio to contributors running containers and holding images, at least in theory).
  • Are there other workload splits between leader/contributors that would likewise cause a uneven ratio in either RAM or vCPU usage between nodes based on their leader/contributor roles respectively?

If I can provision a leader server that uses fewer resources than either its contributor node counterpart by ratio, especially in the storage department, then I may add another server as leader before initial deploy for three way, cross zone contributor load balancing, etc.

Timothy W. Crane
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  • No. And I thank you. I understand "depends" is always the answer when asking for spec provisioning especially... I want no personal use case info, just if Kubernetes eats resources between L/C nodes differently to a WIDE ratio in K8S due to role. I can use the calculator from there ( won't even need it) Thanks. Adding personal specs at the beginning would give that impression. My fault. – Timothy W. Crane Sep 19 '21 at 06:56
  • If you have three notes, that makes you 3 control planes? Resources usage would be comparable. If you go with 1 control plane: it's up to you, to schedule your workloads in a coherent manner. You could set it up to unevenly distribute containers. If you aim to shut down servers and lighten your bill. Or do the contrary. It depends: Kubernetes would deal with your hardware, following your instructions. – SYN Sep 19 '21 at 17:35
  • Side note: spreading a cluster in several timezone (thus, I assume, distinct locations, with variable link quality), definitely isn't a recommended scenario. Maybe consider setting up 3 clusters. – SYN Sep 19 '21 at 17:37

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