Add testing instructions

This adds a TESTING.md guide to test local chart changes against
a running Konvoy cluster.

README.md

@@ -49,6 +49,10 @@ We'd love for you to contribute a Chart. Please consider contributing upstream f
 
 Note: We use the same [workflow](https://github.com/kubernetes/community/blob/master/contributors/devel/development.md#workflow).
 
+## Testing
+
+For instructions on testing chart changes, see [TESTING.md](./TESTING.md)
+
 ## Review Process
 
 For information related to the review procedure used by the Chart repository maintainers, see [Merge approval and release process](CONTRIBUTING.md#merge-approval-and-release-process).

TESTING.md

@@ -0,0 +1,73 @@
+# Testing
+
+## Testing against Konvoy
+
+Testing chart changes against Konvoy requires the following:
+
+  1. hosting your own chart
+  1. updating the addon repo (e.g. `kubernetes-base-addons`, `kubeaddons-kommander`)
+  1. updating the addon in Konvoy's `cluster.yaml`
+
+### Testing flow
+
+Assuming you've forked the `mesosphere/charts` repo, the following is a guide
+on how to manually test your changes from the point of running `konvoy up`.
+
+#### Packaging your chart
+
+  1. Make chart changes
+  1. Update `Chart.yaml`
+      - Update `home` to point to your fork
+      - Increment `version` based on your chart's versioning scheme; commonly [semver](https://semver.org/#semantic-versioning-specification-semver).
+  1. Check your chart has acceptable values/yaml: `helm lint .`
+  1. Package your chart: `helm package .`
+
+#### Hosting your chart
+
+In Github, you can host charts from your own repository.
+ See [Configuring a publishing source for your Github
+ Pages](https://help.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site).
+ A commonly used branch is `gh-pages`.
+
+  1. Generate the `index.yaml` file for your chart. If you're updating a
+    `stable` chart:
+
+      ```sh
+      helm repo index --url "https://<your_github_org>.github.io/charts/stable ."
+      ```
+
+  1. Copy the new chart details under the `entries:` section.
+   This is used later to add a new entry to the remote `index.yaml` file.
+  1. Switch to the `gh-pages` branch: `git checkout gh-pages`
+  1. Copy your local helm archive to the appropriate directory: `cp <chart_tgz> ../stable`
+  1. Update the `index.yaml` file inside of that same directory to include your
+    new chart details: `vim ../stable/index.yaml`
+      - Here you add a new entry for the chart version you're testing
+  1. Commit and push your changes to the `gh-pages` branch
+  1. Now your chart is hosted at `https://<your_github_org>.github.io/charts/stable/<chart.tgz>`
+
+#### Updating the addon repo
+
+Next, you'll need to update the addon that references the chart. Depending on
+ your permissions, you may have to fork the addons repo. For example, if you're
+ updating the `dashboard` chart in `kubernetes-base-addons`, you'll need to
+ update the `<repo>/kubernetes-base-addons/addons/dashboard/<version>/dashboard-<x>.yaml`
+ file.
+
+  1. Update the `chartReference` section:
+      - Point `repo` to your hosted chart url
+      - Update `version` to the chart you're testing
+  1. Commit and push changes to a branch. This branch will be referenced in
+   Konvoy's `cluster.yaml`
+
+#### Deploying addon changes in Konvoy
+
+To deploy Konvoy using your latest addon changes, update Konvoy's
+ `cluster.yaml` `addons:` section:
+
+  1. Update `configRepository` to point to your addons repository
+  1. Update `configVersion` to the your testing branch
+  1. Run `konvoy up`
+      - If you already have a running Konvoy cluster, run `konvoy deploy addons`
+
+Your chart changes should now be reflected in the Addon deployment