1. Labels 1.1 What Labels Are Labels are key-value pairs attached to an object. You can add labels directly when the object is created, or modify them dynamically afterwards. Label format: 1 2 3 4 "labels": { "key1" : "value1", "key2" : "value2" } Format requirements: Key: must be unique Value: must start with a letter or a digit, may contain letters, digits, hyphens, dots, and underscores, and is at most 63 characters long 1.