Upgrade a distributed RHEL, CentOS, or Oracle Linux installation of Splunk UBA

Before upgrading Splunk UBA in a distributed deployment, be sure you have verified the Upgrade Splunk UBA prerequisites. Make sure that the prerequisites are verified on each server in the distributed deployment.

Upgrade your kernel to the latest version

Perform the steps in the table to upgrade your operating system kernel to the latest version. See Operating system requirements for the specific kernel versions.

Operating System	Update Instructions
OEL 7.7, 7.8, 7.9	Run the following command to install yum-utils: sudo yum install yum-utils -y Run the following commands to skip certain packages if they are not available: sudo yum-config-manager --disable pgdg94 sudo yum-config-manager --disable nodesource sudo yum-config-manager --disable rhel-7-server-rt-beta-rpms Obtain http://yum.oracle.com/public-yum-ol7.repo and download it to /home/caspida. sudo wget http://yum.oracle.com/public-yum-ol7.repo /home/caspida Copy public-yum-ol7.repo to /etc/yum.repos.d: sudo cp /home/caspida/public-yum-ol7.repo /etc/yum.repos.d/public-yum-ol7.repo Enable the repositories: sudo yum-config-manager --enable ol7_UEKR5 sudo yum-config-manager --enable ol7_addons Update the kernel to the latest version: Run the following command if you are using OEL 7.7: sudo yum update --releasever=7.7 --exclude="zookeeper redis-server redis-tools influxdb nodejs nodejs-docs postgres*" -y Run the following command if you are using OEL 7.8: sudo yum update --releasever=7.8 --exclude="zookeeper redis-server redis-tools influxdb nodejs nodejs-docs postgres*" -y Run the following command if you are using OEL 7.9: sudo yum update --releasever=7.9 --exclude="zookeeper redis-server redis-tools influxdb nodejs nodejs-docs postgres*" -y
RHEL 7.7, 7.8, or 7.9	Enable the repos for required packages: Run the following commands if you are using RHEL 7.7: sudo subscription-manager repos --enable=rhel-7-server-extras-rpms sudo subscription-manager repos --enable=rhel-7-server-eus-rpms sudo subscription-manager repos --enable=rhel-7-server-rpms sudo subscription-manager repos --enable=rhel-7-server-optional-rpms Run the following commands if you are using RHEL 7.8 or 7.9: sudo subscription-manager repos --enable=rhel-7-server-extras-rpms sudo subscription-manager repos --enable=rhel-7-server-rpms sudo subscription-manager repos --enable=rhel-7-server-optional-rpms Run the following command to install yum-utils: sudo yum install yum-utils -y Run the following commands to skip certain packages if they are not available: sudo yum-config-manager --disable pgdg94 sudo yum-config-manager --disable nodesource sudo yum-config-manager --disable rhel-7-server-rt-beta-rpms Update the kernel to the latest version: Run the following command if you are using RHEL 7.7: sudo yum update --releasever=7.7 --exclude="zookeeper redis-server redis-tools influxdb nodejs nodejs-docs postgres*" -y Run the following command if you are using RHEL 7.8: sudo yum update --releasever=7.8 --exclude="zookeeper redis-server redis-tools influxdb nodejs nodejs-docs postgres*" -y Run the following command if you are using RHEL 7.9: sudo yum update --releasever=7.9 --exclude="zookeeper redis-server redis-tools influxdb nodejs nodejs-docs postgres*" -y
CentOS (latest kernel)	Run the following command to update your CentOS kernel to the latest available version: Running this command updates your CentOS kernel to the latest available version. You can't select a specific version. Run this command only if you are sure you want the latest available verison of CentOS sudo yum update -y

Distributed environment upgrade steps

Install Splunk UBA 5.0.5.1 on the management node only. The upgrade script will update all relevant files on the other Splunk UBA nodes. Ensure that Splunk UBA is running before you upgrade.

To obtain and install Splunk UBA 5.0.5.1, perform the following tasks on the management node:

1. Obtain the Splunk UBA Software Update and download the file to the /home/caspida directory. Select version 5.0.5.1 from the drop-down list. The downloadable archive file is named splunk-uba-software-upgrade-package_5051.tgz.
2. Extract the archive with the following command:

   tar xfz /home/caspida/splunk-uba-software-upgrade-package_5051.tgz -C /home/caspida

   The following files are extracted:

   • splunk-uba-software-update-000004-5051.tgz
   • splunk-uba-software-update-000004-5051.tgz.md5sum
3. Extract the software update package in the /home/caspida directory:

   tar xfz /home/caspida/splunk-uba-software-update_5051/splunk-uba-software-update-000004-5051.tgz -C /home/caspida

4. Apply the patch with the following command:

   /home/caspida/patch_uba_5051/bin/utils/patch_uba.sh -p /home/caspida/patch_uba_5051

   The command installs the new Splunk UBA software, restarts Splunk UBA, and then restarts the data sources.

Apply security patches on your Linux operating system

Perform the following tasks to apply the latest Linux operating system security patches:

1. Log in to the Splunk UBA management node as the caspida user.
2. Run the following command to stop Splunk UBA and all services:

   /opt/caspida/bin/Caspida stop-all

3. On each Splunk UBA node, perform the following tasks:
   1. Log in as the caspida user.
   2. Run the following command to install the security plugin:

      sudo yum -y install yum-plugin-security

   3. Run the following commands to check for any available security updates:

      sudo yum updateinfo list security all
      sudo yum updateinfo list sec
      

   4. Run the following command to update all packages with the available security updates:

      sudo yum update --security -y
      sudo yum --security update-minimal
      

   5. Reboot the system:

      sudo reboot

4. On the Splunk UBA management node, run the following command to start Splunk UBA and all services:

   /opt/caspida/bin/Caspida start-all

Next steps

Verify a successful upgrade of Splunk UBA.