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What are the validations for cluster name in Kubernetes?

Posted December 16, 2019 582 views
Kubernetes

Please tell me the minimum, maximum length of characters for Cluster name and what special characters are allowed for cluster name?

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jkwiatkoski December 16, 2019

Hi there!

We currently use the upstream kubernetes validation logic linked below.

TL;DR - 63 chars max + “a DNS-1035 label must consist of lower case alphanumeric characters or ‘-’, start with an alphabetic character, and end with an alphanumeric character”

https://github.com/kubernetes/kubernetes/blob/7f23a743e8c23ac6489340bbb34fa6f1d392db9d/staging/src/k8s.io/apimachinery/pkg/util/validation/validation.go#L145-L162

Regards,

John Kwiatkoski
Senior Developer Support Engineer - Kubernetes

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