Shutting Down a Cluster Using the MapR Installer Shutdown Button

You can use a single button to shut down MapR software on a cluster.

The Shutdown button appears on the status page of the MapR Installer web interface when you connect to an installed cluster using MapR Installer 1.6 or later. The Shutdown button shuts down Warden and Zookeeper, which in turn shut down other running services that are part of a MapR cluster. When you use the Shutdown button, the MapR Installer implements the same orderly shutdown used to perform software upgrades.

The Shutdown button works differently depending on where the cluster is deployed:

Deployment	Shutdown Button Behavior
On premise	Does not stop non-HPE software and does not power off the nodes.
In the cloud	Shuts down (but does not remove) all the nodes in the cluster: If the installer node is part of the cluster, the installer node is not shut down, but Warden shuts down the services on the installer node. To shut down the installer node, use AWS-console or Azure-portal commands to stop the instance. CAUTION: If a shutdown is initiated on an AWS cluster using an instance store, all data will be lost.

Deployment

Shutdown Button Behavior

On premise

Does not stop non-HPE software and does not power off the nodes.

In the cloud

Shuts down (but does not remove) all the nodes in the cluster:

If the installer node is part of the cluster, the installer node is not shut down, but Warden shuts down the services on the installer node.
To shut down the installer node, use AWS-console or Azure-portal commands to stop the instance.

CAUTION: If a shutdown is initiated on an AWS cluster using an instance store, all data will be lost.

To use the Shutdown button:

Review Shutting Down a Cluster for some pre-shutdown steps you may want to perform before shutting down Warden and Zookeeper.
Use a browser to connect to the cluster using the MapR Installer URL:
```
https://<Installer Node hostname/IPaddress>:9443
```
On the status screen, click the Shutdown button. The MapR Installer asks you if you want to continue.
Click OK. The MapR Installer displays the Authentication screen.
Enter your authentication information if requested, and click Shutdown. The installer begins the shutdown process.
To restart MapR software on the cluster, see Starting Up a Cluster Using the MapR Installer Startup Button.

Note: Do not attempt to restart the cluster until you have confirmed that it is shut down. For an on-premise cluster, the presence of the Startup button on the MapR Installer status page indicates that the cluster is shut down and ready to be started. For a cluster deployed in the cloud, the Startup button must be present, and you must use the AWS or Azure console to verify that the servers are down before restarting.