#!/bin/bash
# Checking whether user has enough permission to run this script
sudo -n true
if [ $? -ne 0 ]
then
echo "This script requires user to have passwordless sudo access"
exit
fi
dependency_check_deb() {
java -version
if [ $? -ne 0 ]
then
# Installing Java 7 if it's not installed
sudo apt-get install openjdk-7-jre-headless -y
# Checking if java installed is less than version 7. If yes, installing Java 7. As logstash & Elasticsearch require Java 7 or later.
elif [ "`java -version 2> /tmp/version && awk '/version/ { gsub(/"/, "", $NF); print ( $NF < 1.7 ) ? "YES" : "NO" }' /tmp/version`" == "YES" ]
then
sudo apt-get install openjdk-7-jre-headless -y
fi
}
dependency_check_rpm() {
java -version
if [ $? -ne 0 ]
then
#Installing Java 7 if it's not installed
sudo yum install jre-1.7.0-openjdk -y
# Checking if java installed is less than version 7. If yes, installing Java 7. As logstash & Elasticsearch require Java 7 or later.
elif [ "`java -version 2> /tmp/version && awk '/version/ { gsub(/"/, "", $NF); print ( $NF < 1.7 ) ? "YES" : "NO" }' /tmp/version`" == "YES" ]
then
sudo yum install jre-1.7.0-openjdk -y
fi
}
debian_elk() {
# resynchronize the package index files from their sources.
sudo apt-get update
# Downloading debian package of logstash
sudo wget --directory-prefix=/opt/ https://artifacts.elastic.co/downloads/logstash/logstash-7.4.1.deb
# Install logstash debian package
sudo dpkg -i /opt/logstash*.deb
# Downloading debian package of elasticsearch
sudo wget --directory-prefix=/opt/ https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.4.1-amd64.deb
# Install debian package of elasticsearch
sudo dpkg -i /opt/elasticsearch*.deb
# Download kibana tarball in /opt
sudo wget --directory-prefix=/opt/ https://artifacts.elastic.co/downloads/kibana/kibana-7.4.1-amd64.deb
# Extracting kibana tarball
sudo dpkg -i /opt/kibana*.deb
# Starting The Services
sudo service logstash start
sudo service elasticsearch start
sudo service kibana start
}
rpm_elk() {
#Installing wget.
sudo yum install wget -y
# Downloading rpm package of logstash
sudo wget --directory-prefix=/opt/ https://artifacts.elastic.co/downloads/logstash/logstash-7.4.1.rpm
# Install logstash rpm package
sudo rpm -ivh /opt/logstash*.rpm
# Downloading rpm package of elasticsearch
sudo wget --directory-prefix=/opt/ https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.4.1-x86_64.rpm
# Install rpm package of elasticsearch
sudo rpm -ivh /opt/elasticsearch*.rpm
# Download kibana tarball in /opt
sudo wget --directory-prefix=/opt/ https://artifacts.elastic.co/downloads/kibana/kibana-7.4.1-x86_64.rpm
# Extracting kibana tarball
sudo rpm -ivh /opt/kibana*.rpm
# Starting The Services
sudo systemctl enable logstash
sudo systemctl start logstash
sudo systemctl enable elasticsearch
sudo systemctl start elasticsearch
sudo systemctl enable kibana
sudo systemctl start kibana
}
# Installing ELK Stack
if [ "$(grep -Ei 'debian|buntu|mint' /etc/*release)" ]
then
echo " It's a Debian based system"
dependency_check_deb
debian_elk
elif [ "$(grep -Ei 'fedora|redhat|centos' /etc/*release)" ]
then
echo "It's a RedHat based system."
dependency_check_rpm
rpm_elk
else
echo "This script doesn't support ELK installation on this OS."
fi
