Kubernetes Cookbook - Second Edition

Getting ready

Before you get to setting labels in the objects, you should consider the valid naming convention of key and value.

A valid key should follow these rules:

• A name with an optional prefix, separated by a slash.
• A prefix must be a DNS subdomain, separated by dots, no longer than 253 characters.
• A name must be less than 63 characters with the combination of [a-z0-9A-Z] and dashes, underscores, and dots. Note that symbols are illegal if put at the beginning and the end.

A valid value should follow the following rules:

• A name must be less than 63 characters with the combination of [a-z0-9A-Z] and dashes, underscores, and dots. Note that symbols are illegal if put at the beginning and the end.

You should also consider the purpose, ...