Question

What are the validations for cluster name in Kubernetes?

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


Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

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