Create a virtual machine.

Configure network:

su - root
hostnamectl set-hostname <enter fqdn>

nmcli c edit <uuid>
 
# set ipv4 address and gateway
nmcli> set ipv4.addresses 1.2.3.4/24 2.3.4.5

# set DNS
nmcli> set ipv4.dns 4.5.6.7 5.6.7.8
nmcli> set ipv4.dns-search yourdomain.com
  
# set autoconnect
nmcli> set connection.autoconnect yes
   
# save and activate
nmcli> save

nmcli c up 'System p4p1'

Configure yum repo's.

Configure time sync (chrony).

Configure firewall, open ports for splunk.

Download Splunk rpm.

Create splunk user:

groupadd splunk
useradd -d /opt/splunk -m -g splunk splunk

Install Splunk:

rpm -i splunk-6.2.1-245427-linux-2.6-x86_64.rpm

Accept license:

./splunk start --accept-license

Create systemd service /usr/lib/systemd/system/splunk.service:

[Unit]
Description=Splunk
After=network.target

[Service]
RemainAfterExit=yes
ExecStart=/opt/splunk/bin/splunk start
ExecStop=/opt/splunk/bin/splunk stop
ExecReload=/opt/splunk/bin/splunk restart
User=splunk
Group=splunk

[Install]
WantedBy=multi-user.target

Enable auto start at boot:

systemctl enable splunk