You can install Splunk on all the indexer peer nodes.
Before You Begin
Install the MediaAgent on all the indexer peer nodes.
Procedure
From the navigation pane, go to Protect > Big data.
The Big data page appears.
Click Add cluster.
The Add cluster page appears.
Click Splunk.
The Add Splunk cluster dialog box appears.
Click the
icon.
The Perform remote install on node dialog box appears.
Click Select this method to install software packages on your computer.
Enter the necessary information.
Click Install.