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Splunk UF Centralized Installation on Linux

Zhanali
Path Finder
‎09-05-2023 11:49 PM

Hi all!

Recently there has been a need to implement a centralized Splunk setup on Linux machines. I managed to do this without using ansible, starting from the script by lguinn2 : https://community.splunk.com/t5/Getting-Data-In/Simple-installation-script-for-Universal-Forwarder/m.... Today I want to share with everyone, of course, if you have any comments or improvements, please write!

I got two slightly different scripts, 1 for CentOS and SuSe, 2 for Ubuntu and Debian. Why, because different installation packages were used. Yes, yes, it was possible to do something differently, I just had to make it as quickly as possible, and the level of knowledge of Linux is also hoarse)  Well, this post is for people like me))

Note. The script has been tested on an Ubuntu distribution, so it is recommended that you work on an Ubuntu machine. Successful completion of work requires SSH access to target devices, the ability to execute ssh and sshpass commands. All target machines must have an identical account with the same password, and this account must be as superuser (with the ability to run commands via sudo).

MyForwarders and MyForwarders_U are simple text files for storing IP addresses of target machines:

Zhanali_0-1693982576561.png

I think for the rest everything is clear from the description, even if there are questions during the time, you will understand everything!

1.

#!/bin/bash

# Credentials of the user who will connect to the target host and run Splunk.
read -p "Enter SSH user name: " username
echo -n "Enter SSH user password: "
stty -echo
read password
stty echo
echo

INSTALLED=False
# Logging file for Splunk status
STATUS_LOG="/home/zhanali/splunk_status.txt"
# File with machine's IPs
HOSTS_FILE="/home/zhanali/MyForwarders"
# Installation file location
INSTALL_FILE="/home/zhanali/splunkforwarder-9.1.0.1-77f73c9edb85.x86_64.rpm"

PREPARE_COMMANDS="
echo $password | sudo -S -k mkdir /opt/splunkforwarder 2>/dev/null
echo $password | sudo -S -k chown -R splunk:splunk /opt/splunkforwarder 2>/dev/null
"

INSTALL_COMMANDS="
echo $password | sudo -S -k chmod 644 /opt/splunkforwarder/splunkforwarder-9.1.0.1-77f73c9edb85.x86_64.rpm 2>/dev/null
echo $password | sudo -S -k rpm -i /opt/splunkforwarder/splunkforwarder-9.1.0.1-77f73c9edb85.x86_64.rpm 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk start --accept-license --answer-yes --no-prompt --seed-passwd '!@#qweasdZXC' 2>/dev/null
echo 'Please wait 10 second....'
sleep 10
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk stop 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk disable boot-start 2>/dev/null
echo $password | sudo -S -k chown -R splunk:splunk /opt/splunkforwarder 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk enable boot-start -user $username 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk start 2>/dev/null
echo $password | sudo -S -k mkdir /home/$username/.splunk 2>/dev/null
echo $password | sudo -S -k chmod 777 -R /home/$username/.splunk 2>/dev/null
echo $password | sudo -S -k sudo -u $username /opt/splunkforwarder/bin/splunk add forward-server 172.16.30.104:9997 -auth 'admin':'!@#qweasdZXC' 2>/dev/null
echo $password | sudo -S -k sudo -u $username /opt/splunkforwarder/bin/splunk set deploy-poll 172.16.30.104:8089 -auth 'admin':'!@#qweasdZXC' 2>/dev/null
"

echo "In 5 seconds, will run the following script on each remote host:"
echo
sleep 5
echo "Reading host IPs from $HOSTS_FILE"
echo
echo "Starting."

for DST in `cat "$HOSTS_FILE"`; do
  if [ -z "$DST" ]; then
    continue;
  fi
  echo "---------------------------------" | tee -a $STATUS_LOG
  echo "Starting work with $DST" | tee -a $STATUS_LOG
  sshpass -p $password ssh -q $username@$DST [[ -f /opt/splunkforwarder/bin/splunk ]] && INSTALLED=True || INSTALLED=False

  if [ "$INSTALLED" = "True" ]; then
    echo "Splunk UF is already installed" | tee -a $STATUS_LOG
    version=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk version | grep 'Splunk Universal Forwarder'" 2>/dev/null)
    echo "Splunk UF version: $version" | tee -a $STATUS_LOG
    status=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk status | grep 'splunkd is '" 2>/dev/null)
    echo "Splunk UF status: $status" | tee -a $STATUS_LOG
    dep=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/deploymentclient.conf | grep '172.16.30.104:8089'" 2>/dev/null)
    fwd=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/outputs.conf | grep '172.16.30.104:9997'" 2>/dev/null)
    if [ -z "$dep" ]; then
      echo "Deployment server is not configured" | tee -a $STATUS_LOG
    else
      echo "Deployment server is configured" | tee -a $STATUS_LOG
    fi
    if [ -z "$fwd" ]; then
      echo "Forward server is not configured" | tee -a $STATUS_LOG
    else
      echo "Forward server is configured" | tee -a $STATUS_LOG
    fi
    INSTALLED=False

  else
    echo "Splunk UF is not installed to host $DST" | tee -a $STATUS_LOG
    echo "Installing..." | tee -a $STATUS_LOG

    sshpass -p $password ssh $username@$DST "$PREPARE_COMMANDS"

    sshpass -p $password scp $INSTALL_FILE $username@$DST:/opt/splunkforwarder

    sshpass -p $password ssh $username@$DST "$INSTALL_COMMANDS"
    echo "Installation is done" | tee -a $STATUS_LOG
    echo "Checking..." | tee -a $STATUS_LOG
    status=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk status | grep 'splunkd is '" 2>/dev/null)
    echo "Splunk UF status: $status" | tee -a $STATUS_LOG
    dep=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/deploymentclient.conf | grep '172.16.30.104:8089'" 2>/dev/null)
    fwd=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/outputs.conf | grep '172.16.30.104:9997'" 2>/dev/null)
    if [ -z "$dep" ]; then
      echo "Deployment server is not configured" | tee -a $STATUS_LOG
    else
      echo "Deployment server is configured" | tee -a $STATUS_LOG
    fi
    if [ -z "$fwd" ]; then
      echo "Forward server is not configured" | tee -a $STATUS_LOG
    else
      echo "Forward server is configured" | tee -a $STATUS_LOG
    fi
  fi
  echo "---------------------------------" | tee -a $STATUS_LOG

done
echo "Done"

And 2.

#!/bin/bash

# Credentials of the user who will connect to the target host and run Splunk.
read -p "Enter SSH user name: " username
echo -n "Enter SSH user password: "
stty -echo
read password
stty echo
echo

INSTALLED=False
# Logging file for Splunk status
STATUS_LOG="/home/zhanali/splunk_status.txt"
# File with machine's IPs
HOSTS_FILE="/home/zhanali/MyForwarders_U"
# Installation file location
INSTALL_FILE="/home/zhanali/splunkforwarder-9.1.0.1-77f73c9edb85-linux-2.6-amd64.deb"

PREPARE_COMMANDS="
echo $password | sudo -S -k mkdir /opt/splunkforwarder 2>/dev/null
echo $password | sudo -S -k chown -R splunk:splunk /opt/splunkforwarder 2>/dev/null
"

INSTALL_COMMANDS="
echo $password | sudo -S -k dpkg -i /opt/splunkforwarder/splunkforwarder-9.1.0.1-77f73c9edb85-linux-2.6-amd64.deb 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk start --accept-license --answer-yes --no-prompt --seed-passwd '!@#qweasdZXC' 2>/dev/null
echo 'Please wait 10 second....'
sleep 10
echo $password | sudo -S -k chown -R splunk:splunk /opt/splunkforwarder 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk stop 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk enable boot-start -user $username 2>/dev/null
echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk start 2>/dev/null
echo 'Please wait 5 second....'
sleep 5
echo $password | sudo -S -k sudo -u $username /opt/splunkforwarder/bin/splunk add forward-server 172.16.30.104:9997 -auth 'admin':'!@#qweasdZXC' 2>/dev/null
echo $password | sudo -S -k sudo -u $username /opt/splunkforwarder/bin/splunk set deploy-poll 172.16.30.104:8089 -auth 'admin':'!@#qweasdZXC' 2>/dev/null
"

echo "In 5 seconds, will run the following script on each remote host:"
echo
sleep 5
echo "Reading host IPs from $HOSTS_FILE"
echo
echo "Starting."

for DST in `cat "$HOSTS_FILE"`; do
  if [ -z "$DST" ]; then
    continue;
  fi
  echo "---------------------------------" | tee -a $STATUS_LOG
  echo "Starting work with $DST" | tee -a $STATUS_LOG
  sshpass -p $password ssh -q $username@$DST [[ -f /opt/splunkforwarder/bin/splunk ]] && INSTALLED=True || INSTALLED=False

  if [ "$INSTALLED" = "True" ]; then
    echo "Splunk UF is already installed" | tee -a $STATUS_LOG
    version=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk version | grep 'Splunk Universal Forwarder'" 2>/dev/null)
    echo "Splunk UF version: $version" | tee -a $STATUS_LOG
    status=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk status | grep 'splunkd is '" 2>/dev/null)
    echo "Splunk UF status: $status" | tee -a $STATUS_LOG
    dep=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/deploymentclient.conf | grep '172.16.30.104:8089'" 2>/dev/null)
    fwd=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/outputs.conf | grep '172.16.30.104:9997'" 2>/dev/null)
    if [ -z "$dep" ]; then
      echo "Deployment server is not configured" | tee -a $STATUS_LOG
    else
      echo "Deployment server is configured" | tee -a $STATUS_LOG
    fi
    if [ -z "$fwd" ]; then
      echo "Forward server is not configured" | tee -a $STATUS_LOG
    else
      echo "Forward server is configured" | tee -a $STATUS_LOG
    fi
    INSTALLED=False

  else
    echo "Splunk UF is not installed to host $DST" | tee -a $STATUS_LOG
    echo "Installing..." | tee -a $STATUS_LOG

    sshpass -p $password ssh $username@$DST "$PREPARE_COMMANDS"

    sshpass -p $password scp $INSTALL_FILE $username@$DST:/opt/splunkforwarder

    sshpass -p $password ssh $username@$DST "$INSTALL_COMMANDS"
    echo "Installation is done" | tee -a $STATUS_LOG
    echo "Checking..." | tee -a $STATUS_LOG
    status=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k /opt/splunkforwarder/bin/splunk status | grep 'splunkd is '" 2>/dev/null)
    echo "Splunk UF status: $status" | tee -a $STATUS_LOG
    dep=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/deploymentclient.conf | grep '172.16.30.104:8089'" 2>/dev/null)
    fwd=$(sshpass -p $password ssh $username@$DST "echo $password | sudo -S -k cat /opt/splunkforwarder/etc/system/local/outputs.conf | grep '172.16.30.104:9997'" 2>/dev/null)
    if [ -z "$dep" ]; then
      echo "Deployment server is not configured" | tee -a $STATUS_LOG
    else
      echo "Deployment server is configured" | tee -a $STATUS_LOG
    fi
    if [ -z "$fwd" ]; then
      echo "Forward server is not configured" | tee -a $STATUS_LOG
    else
      echo "Forward server is configured" | tee -a $STATUS_LOG
    fi
  fi
  echo "---------------------------------" | tee -a $STATUS_LOG

done
echo "Done"

 

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