HDP comprises many services. You must install the HDFS and ZooKeeper services. You may choose to install any other available services now, or to add services later. The install wizard selects all available services for installation by default.
Choose none to clear all selections, or choose all to select all listed services.
Choose or clear individual checkboxes to define a set of services to install now.
![[Note]](../common/images/admon/note.png)
Note To use Ambari for monitoring your cluster, you must select Nagios and Ganglia. Not selecting these services generates a warning message when you complete this section. If you monitor your cluster using other tools, ignore the warning.
After selecting the services to install now, choose Next.
