Splunk® Enterprise

Distributed Deployment Manual

Download manual as PDF

Splunk Enterprise version 5.0 reached its End of Life on December 1, 2017. Please see the migration information.
This documentation does not apply to the most recent version of Splunk. Click here for the latest version.
Download topic as PDF

Migrate a Windows light forwarder

If you want to replace an existing light forwarder with a universal forwarder, you need to first migrate its checkpoint data to the new forwarder. Checkpoint data is internal data that the forwarder compiles to keep track of what data it has already forwarded to an indexer. By migrating the checkpoint data, you prevent the new universal forwarder from forwarding any data already sent by the old light forwarder. This ensures that the same data does not get indexed twice.

You can migrate checkpoint data from an existing Windows light forwarder (version 4.0 or later) to the universal forwarder. For an overview of migration, see "Migrating from a light forwarder" in the Deployment Overview.

If you want to migrate, you must do so during the installation process. You cannot migrate post-installation.

You perform a Windows installation with either the installer GUI or the commandline:

Important: You must install the universal forwarder in a different directory from the existing light forwarder. Since the default install directory for the universal forwarder is C:\Program Files\SplunkUniversalForwarder and the default install directory for full Splunk (including the light forwarder) is C:\Program Files\Splunk, you'll be safe if you just stick with the defaults.

What the installer does

Whichever installation method you use, the Windows installer performs the following actions:

1. Searches for an existing heavy or light forwarder on the machine.

2. Determines whether the forwarder is eligible for migration (must be at version 4.0 or above).

3. If it finds an eligible forwarder, the GUI offers the user the option of migrating. (The commandline installer looks to see whether the MIGRATESPLUNK=1 flag exists.)

4. If user specifies migration (or the MIGRATESPLUNK=1 flag exists), the installer shuts down any running services (splunkd and, if running, splunkweb) for the existing forwarder. It also sets the startup type of the services to manual, so that they don't start up again upon reboot.

5. Migrates the checkpoint files to the universal forwarder.

6. Completes installation and configuration of the universal forwarder.

What you need to do

At the end of this process, you might want to perform additional configuration on the universal forwarder. Since the migration process only copies checkpoint files, you will probably want to manually copy over the old forwarder's inputs.conf configuration file (or at least examine it, to determine what data inputs it was monitoring).

Once the universal forwarder is up and running (and after you've tested to ensure migration worked correctly), you can uninstall the old forwarder.

PREVIOUS
Make a universal forwarder part of a system image
  NEXT
Migrate a *nix light forwarder

This documentation applies to the following versions of Splunk® Enterprise: 4.3, 4.3.1, 4.3.2, 4.3.3, 4.3.4, 4.3.5, 4.3.6, 4.3.7, 5.0, 5.0.1, 5.0.2, 5.0.3, 5.0.4, 5.0.5, 5.0.6, 5.0.7, 5.0.8, 5.0.9, 5.0.10, 5.0.11, 5.0.12, 5.0.13, 5.0.14, 5.0.15, 5.0.16, 5.0.17, 5.0.18


Was this documentation topic helpful?

Enter your email address, and someone from the documentation team will respond to you:

Please provide your comments here. Ask a question or make a suggestion.

You must be logged into splunk.com in order to post comments. Log in now.

Please try to keep this discussion focused on the content covered in this documentation topic. If you have a more general question about Splunk functionality or are experiencing a difficulty with Splunk, consider posting a question to Splunkbase Answers.

0 out of 1000 Characters