Final answer:
The 'server.conf' file is used to configure cluster status on a Splunk instance.
Step-by-step explanation:
The .conf file used to configure cluster status on a Splunk instance is called the 'server.conf' file. This file contains settings and parameters that control the behavior of the Splunk server, including cluster-related settings.
For example, in the 'server.conf' file, you can specify the 'multisite' parameter to define the sites in your Splunk cluster and their properties. You can also configure various other cluster settings like replication factor, search factor, and cluster discovery settings.
To access and modify the 'server.conf' file, you can navigate to the 'etc/system/local' directory in your Splunk installation directory.