Understanding the YAML format

YAML Ain't Markup Language (YAML) is a file format used to create human-readable configuration. It is the file format most commonly used to configure Kubernetes resources and is also the format used for many of the files in Helm charts.

YAML files follow a key-value format to declare configuration. Let's explore the YAML key-value construct.

Defining key-value pairs

One of the most basic examples of a YAML key-value pair is shown here:

name: LearnHelm

In the preceding example, the name key is given a LearnHelm value. In YAML, keys and values are separated by a colon (:). Characters written to the left of the colon represent the key, while characters written to the right of the colon represent the value.

Spacing matters in YAML format. The following line does not constitute a key-value pair:

name:LearnHelm

Notice that a space is missing between the colon and the LearnHelm string. This would result in a parsing error. A...