Upgrade Splunk Enterprise Security

This topic describes how to upgrade Splunk Enterprise Security on an on-premises search head from version 6.0.2 and higher or 6.1.1 and higher. Splunk Cloud customers work with Splunk Support to coordinate upgrades to Enterprise Security.

Step 1. Review the planning topic

1. For an overview of the upgrade process and prerequisites, see Planning an upgrade in this manual.
2. Perform a full backup of the search head, including the KV Store, before upgrading. The upgrade process does not back up the existing installation before upgrading. See Back up KV Store for instructions on how to back up the KV Store on the search head.

To back out of the upgrade, you must restore the prior version of Splunk Enterprise Security from backup.

Step 2. Download Splunk Enterprise Security

1. Open splunk.com and log in with your Splunk.com ID. You must be a licensed Enterprise Security customer to download the product.
2. Download the latest Splunk Enterprise Security product.
3. Choose Download and save the Splunk Enterprise Security product file to your desktop.
4. Log in to the Enterprise Security search head as an administrator.

Step 3. Install the latest Splunk Enterprise Security

The installer dynamically detects if you're installing in a single search head environment or search head cluster environment. The installer is also bigger than the default upload limit for Splunk Web.

1. Increase the Splunk Web upload limit to 1 GB by creating a file called $SPLUNK_HOME/etc/system/local/web.conf with the following stanza.
   
   [settings]
   max_upload_size = 1024
2. To restart Splunk from the Splunk toolbar, select Settings > Server controls and click Restart Splunk.
3. On the Splunk Enterprise search page, select Apps > Manage Apps and choose Install App from File.
4. Select the Splunk Enterprise Security product file.
5. Click Choose File and select the Splunk Enterprise Security product file.
6. Click Upgrade app to overwrite the existing Splunk Enterprise Security installation.
7. Click Upload to begin the installation.
8. When prompted, configure Splunk Enterprise Security.
9. Click Restart Splunk.

If you do not run the setup procedure promptly after the file upload completes, Enterprise Security displays errors.

Step 4. Set up Splunk Enterprise Security

After Splunk Web returns after the restart, set up Splunk Enterprise Security.

1. Click Continue to app setup page to start the ES setup.
2. Click Start.
3. The Splunk Enterprise Security Post-Install Configuration page indicates the upgrade status as it moves through the stages of installation.
4. Choose to exclude selected add-ons from being installed, or install and disable them.
   When the setup is done, the page prompts you to restart Splunk platform services.
5. Click Restart Splunk to finish the installation.

Step 5. Validate the upgrade

The Splunk Enterprise Security upgrade process is now complete. Objects disabled during the upgrade process will automatically be enabled.

1. On the Enterprise Security menu bar, select Audit > ES Configuration Health.
2. Review potential conflicts and changes to the default settings. See ES Configuration Health in the User Manual.
3. Clear the browser cache of the browser you use to access Splunk Web to make sure that you access a fresh version of Splunk Web after upgrading. If you do not clear the browser cache, some pages might fail to load.

Splunk logs the upgrade in $SPLUNKHOME$/var/log/splunk/essinstaller2.log

Version-specific upgrade notes

Things to do after upgrading to specific versions of Enterprise Security.

After upgrading to version 6.2

When you upgrade the Splunk Enterprise Security app to versions 6.0 or higher, you might see the issues mentioned in After upgrading to version 6.0. For complete details, see Manage asset and identity upon upgrade.

After upgrading to Enterprise Security 6.2.0, you need to enable Enforce props in the Global Settings of Asset and Identity Management if you want the identity manager to automatically enforce configuration file settings. On a fresh installation, Enterprise Security 6.2.0 has Enforce props set to enabled by default and the setting is enforced continuously. However, prior versions only enforce once and then switch the setting to false right away. If you're already using a previous version of ES with assets and identities, the /local/inputs.conf file already has enforce_props=false and it needs to be set back to true after you upgrade, if you want to ensure that settings are managed for you. The majority of users who configure settings through the Splunk Web UI will benefit from enabling the setting. See Revise the enforcements used by the identity manager framework.

After upgrading to version 6.1.0

When you upgrade the Splunk Enterprise Security app to versions 6.0 or higher, you might see the issues mentioned in After upgrading to version 6.0. For complete details, see Manage asset and identity upon upgrade.

MLTK app version 5 is now included in the ES installer. The previously generated models from MLTK 4.x are not compatible and have to be regenerated. See Machine Learning Toolkit Overview in Splunk Enterprise Security for general information about models in MLTK 5. See Update Splunk MLTK models for Python 3 in the Splunk Enterprise Python 3 Migration manual for information about rebuilding models.

After upgrading to version 6.0

When you upgrade the Splunk Enterprise Security app to versions 6.0 or higher, you might see the following issues in Assets and Identities:

• The Asset and Identity Management navigation bar and page does not display if you have customized the menu bar in Splunk Enterprise Security. See Restore the default navigation or Recover the new view of Assets and Identities Navigation page.
• The Asset and Identity page merges the data for your assets and identities after the upgrade. For more information on how to avoid merged rows to display, see Avoid merged assets and identities data.
• The asset and identity collections, search previews, and search results may display differently from before the upgrade. To restore the previous view that you had prior to the upgrade, see Recover the new view of Assets and Identities Navigation page.
• The Asset and Identity page does not enable access to some of your previously saved macros. You may no longer be able to access saved macros if they were not documented for public use.

For complete details, see Manage asset and identity upon upgrade.

After upgrading to version 5.3.x

If you followed the default behavior and installed the technology add-ons that shipped with Enterprise Security in previous versions, after upgrading to version 5.3.x you will notice messages that state, "TA-<name> version <number> is lower than required." This is expected behavior with the recent installer enhancements. After upgrading, do one of the following:

• Update the technology add-ons manually. See Deploy add-ons included with Splunk Enterprise Security.
• Disable the modular input that manages these messages by going to Settings > Data Inputs > Configuration Checker, and disabling the confcheck_es_app_version input.

After upgrading to version 5.1.x

Manually delete the file $SPLUNK_HOME/etc/apps/splunk_instrumentation/default/data/ui/views/search.xml. After deleting the file, do one of the following:

• Refresh Splunk Web: http(s)://yoursplunkurl.com:8000/en-US/debug/refresh?entity=data/ui/views
• Refresh splunkd: http(s)://yoursplunkurl.com:8089/services/data/ui/views/_reload

After upgrading to version 5.0.x

• Select the Edit Lookups permission checkbox again. Because the Edit Lookups permission now includes an additional capability, the permission is not checked by default. Roles still have the edit_lookups capability. See Configure users and roles in the Installation and Upgrade Manual
• Enable the Access - Geographically Improbable Access - Summary Gen search to see data on the Geographically Improbable Access panel of the Access Anomalies dashboard or notable events produced by the Geographically Improbable Access Detected correlation search.

After upgrading from a version prior to 4.1.x

• Correlation search editor configurations might be inconsistent with pre-upgrade settings if the search migration process is still running. Search the internal index to look for successfully migrated searches and review the status of the migration operation.
  

  index=_internal sourcetype=configuration_check file="confcheck_es_modactions*" migrated

• Enabled correlation searches that are not configured to create notable events revert to creating notable events.
  For example, a correlation search that by default created a notable event and a risk modifier that you configured to create only a risk modifier will, after upgrade, create both a risk modifier and a notable event.

1. Before upgrading, note enabled correlation searches that do not create notable events using the following search.
   

   | rest splunk_server=local count=0 /services/saved/searches search="name=\"*-Rule\"" | where disabled=0 AND 'action.summary_index'=0 | table 'eai:acl.app',title

2. After the upgrade is complete, update the affected correlation searches so that the searches no longer create notable events.

After upgrading from version 6.2.0 or lower to a version 6.3.0 or higher

Modifying risk factors using the Risk Factor Editor automatically creates corresponding field entries in the risk datamodel Risk.json. However, upgrading from enterprise Security version 6.2.0 or lower to a version 6.3.0 or higher may cause a mismatch if there is a discrepancy in the field entries of the local and the default configuration files of the risk data model and result in an error. Upgrading to Enterprise Security 6.4.1 or higher does not allow you to remove existing fields but only allows you to add fields to the risk data model. This prevents the mismatch between the local and the default configuration of the risk data model.

Test upgrade and setup of Splunk Enterprise Security

You can test the upgrade and setup of Splunk Enterprise Security before you perform the full upgrade. You must complete Step 1. Review the planning topic, Step 2. Download Splunk Enterprise Security, and the first two sub-steps of Step 3. Install the latest Splunk Enterprise Security before you can follow these steps.

1. From Splunk Web, open the Search and Reporting app.
2. Type the following search to perform a dry run of the upgrade and setup.

   |essinstall --dry-run