Components of a Splunk deployment

Components of a Splunk deployment

Splunk is simple to deploy by design. By using a single software component and easy to understand configurations, Splunk can coexist with existing infrastructure or be deployed as a universal platform for accessing IT data.

The simplest deployment is the one you get by default when you install Splunk: indexing and searching on the same server. Data comes in from the sources you've configured, and you log into Splunk Web or the CLI on this same server to search, monitor, alert, and report on your IT data.

Depending on your needs, you can also deploy components of Splunk on different servers to address your load and availability requirements. This section covers these potential components:

Indexer

Splunk indexers, or index servers, provide indexing capability for local and remote data and host the primary Splunk datastore, as well as Splunk Web. Refer to "How indexing works" in the Admin Manual for more information.

Search peer

A search peer is an indexer that services requests from search heads in a distributed search deployment. Search peers are also sometimes referred to as indexer nodes.

Search head

A search head is a Splunk instance configured to distribute searches to indexers, or search peers. Search heads can be either dedicated or not, depending on whether they also perform indexing. Dedicated search heads don't have any indexes of their own (other than the usual internal indexes). Instead, they consolidate results originating from remote search peers.

See distributed search to configure a search head to search across a pool of indexers.

Forwarder

Forwarders are Splunk instances that forward data to remote indexers for indexing and storage. In most cases, they do not index data themselves. To reduce operational footprint, Splunk Web is usually not used. Refer to the documentation on setting up a Splunk instance as a forwarder.

Deployment server

Both indexers and forwarders can also act as deployment servers. A deployment server distributes configuration information to running instances of Splunk via a push mechanism which is enabled through configuration. Refer to the documentation on setting up a Splunk instance as a deployment server.

Functions at a glance

Functions	Indexer	Search head	Forwarder	Deployment server
Indexing	x
Web	x
Direct search		x
Forward to indexer			x
Deploy configurations	x		x	x

• Was this topic useful?
• Post a comment