Is there a major difference between either CPU, RAM or Storage capacity needs for the leader or contributor nodes in a production K8S cluster?

Timothy W. Crane

1/19/23, 6:24 AM

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.

0 + 0

load-balancing

resource-management

kubernetes

kubeadm

Timothy W. Crane

1/19/23, 6:56 AM

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.

SYN

1/19/23, 5:35 PM

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

1/19/23, 5:37 PM

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.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Is there a major difference between either CPU, RAM or Storage capacity needs for the leader or contributor nodes in a production K8S cluster?

TH: มีความแตกต่างที่สำคัญระหว่างความต้องการ CPU, RAM หรือพื้นที่เก็บข้อมูลสำหรับโหนดผู้นำหรือผู้สนับสนุนในคลัสเตอร์ K8S ที่ใช้งานจริงหรือไม่

RO: Există o diferență majoră între nevoile de CPU, RAM sau de capacitate de stocare pentru nodurile lider sau contributive într-un cluster K8S de producție?

RU: Есть ли существенная разница между потребностями в ресурсах ЦП, ОЗУ или хранилища для ведущего или вспомогательного узла в рабочем кластере K8S?

VI: Có sự khác biệt lớn giữa nhu cầu CPU, RAM hoặc Dung lượng lưu trữ cho các nút dẫn đầu hoặc nút đóng góp trong cụm K8S sản xuất không?

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