You can install Splunk on the master node.
Before You Begin
You need the following information:
Host name
User name and password
OS type
Procedure
From the navigation pane, go to Manage > Servers.
The Servers page appears.
In the upper-right area of the page, click Add access node.
The Add gateway dialog box appears.
From the Select packages list, select Splunk, and then click OK.
Click Install.