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Install Splunk Enterprise 6.2 on CentOS 7 Minimal as a non-root user systemd service and enable syslog on port 514 and http on port 80
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| #!/bin/bash | |
| # Install Splunk 6.2 on CentOS 7 as a non-root user service that runs on boot with | |
| # systemd. This script also opens the firewall to allow syslog on UDP port 514. Since | |
| # we're running Splunk as non-root, this port is then forwarded to 5514. Configuring a | |
| # syslog input in slunk on UDP 514 will gather this data. Must be run as root | |
| # Create Account | |
| useradd splunk | |
| groupadd splunk | |
| # Install RPM from CLI argument | |
| yum -y install $1 | |
| # Set environment var permanently and then for this session | |
| echo "export SPLUNK_HOME=/opt/splunk" > /etc/profile.d/splunk.sh | |
| export SPLUNK_HOME=/opt/splunk | |
| # Set ownership on SPLUNK_HOME | |
| chown -R splunk:splunk $SPLUNK_HOME | |
| # Firewall mods | |
| # Allow web access on port tcp 8000, syslog on udp 5514 | |
| firewall-cmd --zone=public --permanent --add-port=8000/tcp | |
| firewall-cmd --zone=public --permanent --add-port=5514/udp | |
| # Forward syslog input to high port for non-root, allow port 80 for http | |
| firewall-cmd --direct --permanent --add-rule ipv4 nat PREROUTING 0 -p udp -m udp \ | |
| --dport 514 -j REDIRECT --to-ports 5514 | |
| firewall-cmd --direct --permanent --add-rule ipv4 nat PREROUTING 0 -p tcp -m tcp \ | |
| --dport 80 -j REDIRECT --to-ports 8000 | |
| # Reload firewall | |
| firewall-cmd --reload | |
| # Create Systemd Unit file | |
| echo "[Unit] | |
| Description=Splunk Enterprise | |
| Wants=network.target | |
| After=network.target | |
| [Service] | |
| User=splunk | |
| RemainAfterExit=yes | |
| ExecStart=/opt/splunk/bin/splunk start | |
| ExecStop=/opt/splunk/bin/splunk stop | |
| ExecReload=/opt/splunk/bin/splunk restart | |
| [Install] | |
| WantedBy=multi-user.target" > /usr/lib/systemd/system/splunk.service | |
| # Link the Unit File as a service | |
| ln -sf /usr/lib/systemd/system/splunk.service \ | |
| /etc/systemd/system/multi-user.target.wants/splunk.service | |
| # First Run | |
| sudo -H -u splunk $SPLUNK_HOME/bin/splunk start --accept-license | |
| echo "You should now restart your machine, Splunk will run on boot" |
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