MM-15383 Adding RELEASE.md to cover the chart-releaser updates (#72)

* MM-15383 Adding RELEASE.md to cover the chart-releaser updates

* MM-15383 Updating README.md to cover the use of Helm Chart releases

README.md

@@ -26,7 +26,7 @@ We recommend installing Helm v2.13.1 or later.
 Once Helm is installed and initialized, run the following:
 
 ```bash
-helm repo add mattermost https://releases.mattermost.com/helm
+helm repo add mattermost https://helm.mattermost.com
 helm repo add incubator https://kubernetes-charts-incubator.storage.googleapis.com/
 ```
 
@@ -162,27 +162,27 @@ See the [stable/minio configuration settings](https://github.com/helm/charts/tre
 
 # 3. Install
 
-Clone this repository and cd into it:
+After adding the Mattermost repo (see section 1.2) you can install a version of the preferred chart by running:
+
 ```bash
-git clone https://github.com/mattermost/mattermost-kubernetes.git
-cd mattermost-kubernetes
+helm install --repo https://helm.mattermost.com <chart_name> --version <version_number>
 ```
 
-Get the dependencies needed to run the chart:
+For example:
 ```bash
-cd ./charts/mattermost-enterprise-edition
-helm dependencies update
-cd ..
+helm install --repo https://helm.mattermost.com mattermost-enterprise-edition --version v0.8.2
 ```
 
+If no Helm Chart version is specified the latest version will be installed.
+
 To run with your custom `config.yaml`, install using:
 ```bash
-helm install -f config.yaml ./mattermost-enterprise-edition
+helm install -f config.yaml --repo https://helm.mattermost.com mattermost-enterprise-edition
 ```
 
 To upgrade an existing release, modify the `config.yaml` with your desired changes and then use:
 ```bash
-helm upgrade -f config.yaml <your-release-name> ./charts/mattermost-enterprise-edition
+helm upgrade -f config.yaml <your-release-name> --repo https://helm.mattermost.com mattermost-enterprise-edition
 ```
 
 ## 3.1 Uninstalling Mattermost Enterprise Helm Chart
@@ -193,13 +193,13 @@ If you are done with your deployment and want to delete it, use `helm delete <yo
 
 You can launch the Mattermost push proxy chart with:
 ```bash
-helm install ./charts/mattermost-push-proxy
+helm install --repo https://helm.mattermost.com mattermost-push-proxy
 ```
 
 To list options for mattermost-push-proxy:
 
 ```bash
-helm inspect values mattermost-push-proxy
+helm inspect values --repo https://helm.mattermost.com mattermost-push-proxy
 ```
 
 # 4. Developing

RELEASE.md

@@ -0,0 +1,37 @@
+Mattermost Helm Chart Releases
+====================================================
+
+# Chart Releaser
+
+ The [chart-releaser](https://github.com/helm/chart-releaser) is being used to enable the mattermost-helm [repo](https://github.com/mattermost/mattermost-helm) to self-host Helm Chart releases via the use of Github pages.
+
+# CircleCI
+
+CircleCI is being used to release a new version of the Mattermost Helm Charts. The [release script](https://github.com/mattermost/mattermost-helm/blob/master/.circleci/release.sh) creates a release package of the new Helm Chart version and updates the [index.yaml](https://github.com/mattermost/mattermost-helm/blob/gh-pages/index.yaml) which in this case is hosted in a Github page. The CircleCI is triggered, when a new commit is pushed in the **master** branch.
+
+# How to Release a new Version
+
+For a new Helm Chart release the version of the Helm Chart should be updated in the *Chart.yaml*. The chart-releaser tool will handle the packaging of the new version, will push it to the Github repo as a new [release](https://github.com/mattermost/mattermost-helm/releases) and update the index file to reflect the new version.
+
+# How to Install a New Release
+
+The *index.yaml* is hosted in a Github page and can be accessed via https://helm.mattermost.com/. In order to make use of a Mattermost Helm Chart specific version the Mattermost Helm repo should be added first by running:
+
+```bash
+helm repo add mattermost https://helm.mattermost.com
+```
+
+And then a version of the preferred chart can be installed by running:
+
+```bash
+helm install --repo https://helm.mattermost.com <chart_name> --version <version_number>
+```
+
+For example:
+
+
+```bash
+helm install --repo https://helm.mattermost.com mattermost-push-proxy --version v0.1.4
+```
+
+If no Helm Chart version is specified the latest version will be installed.