Docker EE部署中com.docker.ucp.access.label字段命名格式咨询

Let's break down the exact rules and answer your specific questions clearly:

Core Naming Requirements #

Docker UCP (Universal Control Plane) enforces strict formatting rules for the com.docker.ucp.access.label field to ensure compatibility and consistency:

• Allowed characters: Lowercase letters (a-z), numbers (0-9), and hyphens (-)
• Format constraints:
  • Must start with either a lowercase letter or a number
  • Must end with either a lowercase letter or a number
  • Cannot contain consecutive hyphens (e.g., app--examples is invalid)
  • No uppercase letters, underscores, dots, or special characters are permitted

Your Specific Scenarios #

1. Current label: app-examples #

This is fully compliant with the rules: it starts and ends with letters, uses only allowed characters, and has no consecutive hyphens. You can keep using this without any issues.

2. Proposed label: 100app-examples100 #

This is also valid! It starts and ends with numbers, uses a mix of numbers, lowercase letters, and a single non-consecutive hyphen—all within the allowed character set. Feel free to adopt this label if it aligns with your organization's labeling strategy.

Quick Invalid Label Examples #

To help you avoid mistakes, here are some labels that would be rejected by UCP:

• App-Examples (contains uppercase letters)
• _app-examples (starts with an underscore)
• app--examples (has consecutive hyphens)
• app-examples! (includes a special character)
• app.examples (uses a dot instead of a hyphen)

内容的提问来源于stack exchange，提问作者Ramesh Mohan Reddy