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 server.
The Add server dialog box appears.
Click Select this method to install software packages on your computer.
Enter the necessary information.
From the Select packages list, select Splunk, and then click OK.
Click Install.