Merge pull request #1069 from prydonius/add-notes-to-spec

docs(notes.txt): Add NOTES.txt to Chart spec, and describe chart documentation files

docs/charts.md

@@ -22,13 +22,14 @@ Inside of this directory, Helm will expect a structure that matches this:
 
 ```
 wordpress/
-  Chart.yaml        # A YAML file containing information about the chart
-  LICENSE           # OPTIONAL: A plain text file containing the license for the chart
-  README.md         # OPTIONAL: A human-readable README file
-  values.yaml       # The default configuration values for this chart
-  charts/           # OPTIONAL: A directory containing any charts upon which this chart depends.
-  templates/        # OPTIONAL: A directory of templates that, when combined with values,
-                    # will generate valid Kubernetes manifest files.
+  Chart.yaml          # A YAML file containing information about the chart
+  LICENSE             # OPTIONAL: A plain text file containing the license for the chart
+  README.md           # OPTIONAL: A human-readable README file
+  values.yaml         # The default configuration values for this chart
+  charts/             # OPTIONAL: A directory containing any charts upon which this chart depends.
+  templates/          # OPTIONAL: A directory of templates that, when combined with values,
+                      # will generate valid Kubernetes manifest files.
+  templates/NOTES.txt # OPTIONAL: A plain text file containing short usage notes
 ```
 
 Helm will silently strip out any other files.
@@ -88,6 +89,25 @@ in the `Chart.yaml` as a token in the package name. The system assumes
 that the version number in the chart package name matches the version number in
 the `Chart.yaml`. Failure to meet this assumption will cause an error.
 
+## Chart LICENSE, README and NOTES
+
+Charts can also contain files that describe the installation, configuration, usage and license of a
+chart. A README for a chart should be formatted in Markdown (README.md), and should generally
+contain:
+
+- A description of the application or service the chart provides
+- Any prerequisites or requirements to run the chart
+- Descriptions of options in `values.yaml` and default values
+- Any other information that may be relevant to the installation or configuration of the chart
+
+The chart can also contain a short plain text `templates/NOTES.txt` file that will be printed out
+after installation, and when viewing the status of a release. This file is evaluated as a
+[template](#templates-and-values), and can be used to display usage notes, next steps, or any other
+information relevant to a release of the chart. For example, instructions could be provided for
+connecting to a database, or accessing a web UI. Since this file is printed to STDOUT when running
+`helm install` or `helm status`, it is recommended to keep the content brief and point to the README
+for greater detail.
+
 ## Chart Dependencies
 
 In Helm, one chart may depend on any number of other charts. These