Worklet: Install Zabbix Agent on Linux

Checks to see if Zabbix is installed and if not, installs it. Covers Centos and Ubuntu, but can be extended for other Linux flavors fairly easily.

Evaluation code:

#!/bin/bash
service=zabbix_agent

if (( $(ps -ef | grep -v grep | grep $service | wc -l) > 0 ))
then
exit 0
else
exit 1
fi

Remediation code:

#!/bin/bash

#Get OS
os_id="$(grep -w ID /etc/os-release | cut -d'=' -f2)"

#Functions
centos () {
	if [ $os_ver == '8.0' ]; then
    	#Remove all dirty packages
    	rpm -e zabbix-release-*
        
		#Get the Package
		rpm -Uvh http://repo.zabbix.com/zabbix/4.0/rhel/8/x86_64/zabbix-release-4.0-2.el8.noarch.rpm
		
		#Clean and Install with Yum
        yum clean all
		yum -y install zabbix-agent

		#Overwrite the conf file with attached
		cp zabbix_agentd.conf /etc/zabbix/zabbix_agentd.conf
		
		#Edit config to personalize for new system
		CONFIGPATH="/etc/zabbix/zabbix_agentd.conf"
		TARGET_KEY="Hostname"
		REPLACEMENT_VALUE="$(hostname)"
		sed -c -i "s/\($TARGET_KEY *= *\).*/\1$REPLACEMENT_VALUE/" $CONFIGPATH

		#Enable Zabbix as Service (Automatic Startup at Boot)
		systemctl enable zabbix-agent

		#Start the agent
		systemctl start zabbix-agent
        
    fi

	if [ $os_ver == '7' ]; then
    	#Remove all dirty packages
    	rpm -e zabbix-release-*
        
		#Get the Package
		rpm -Uvh http://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-1.el7.noarch.rpm
		
		#Clean and install with Yum
        yum clean all
		yum -y install zabbix-agent

		#Overwrite the conf file with attached
		cp zabbix_agentd.conf /etc/zabbix/zabbix_agentd.conf
		
		#Edit config to personalize for new system
		CONFIGPATH="/etc/zabbix/zabbix_agentd.conf"
		TARGET_KEY="Hostname"
		REPLACEMENT_VALUE="$(hostname)"
		sed -c -i "s/\($TARGET_KEY *= *\).*/\1$REPLACEMENT_VALUE/" $CONFIGPATH

		#Enable Zabbix as Service (Automatic Startup at Boot)
		systemctl enable zabbix-agent

		#Start the agent
		systemctl start zabbix-agent
        
    fi
	
	if [ $os_ver == '6' ]; then
    	#Remove all dirty packages
	    rpm -e zabbix-release-*
    
		#Get the Package
        wget https://repo.zabbix.com/zabbix/4.0/rhel/6/x86_64/zabbix-release-4.0-2.el6.noarch.rpm
		rpm -Uvh zabbix-release-4.0-2.el6.noarch.rpm
		
		#Clean and install with Yum
        yum clean all
		yum -y install zabbix-agent
		
		#Overwrite the conf file with attached
		cp zabbix_agentd.conf /etc/zabbix/zabbix_agentd.conf
		
		#Edit config to personalize for new system
		CONFIGPATH="/etc/zabbix/zabbix_agentd.conf"
		TARGET_KEY="Hostname"
		REPLACEMENT_VALUE="$(hostname)"
		sed -c -i "s/\($TARGET_KEY *= *\).*/\1$REPLACEMENT_VALUE/" $CONFIGPATH
		
		#Enable Zabbix as Service (Automatic Startup at Boot)
		service zabbix-agent enable
		
		#Start the agent
		service zabbix-agent start
		
	fi
}

ubuntu () {
	#Get the Package
	#wget https://repo.zabbix.com/zabbix/4.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_4.0-3+bionic_all.deb
	#dpkg -i zabbix-release_4.0-3+bionic_all.deb

	#Install with apt
	apt-get update
	apt-get -y install zabbix-agent

	#Overwrite the conf file with attached
	cp zabbix_agentd.conf /etc/zabbix/zabbix_agentd.conf
	
	#Edit config to personalize for new systemctl
	CONFIGPATH="/etc/zabbix/zabbix_agentd.conf"
	TARGET_KEY="Hostname"
	REPLACEMENT_VALUE="$(hostname)"
	sed -i "s/\($TARGET_KEY *= *\).*/\1$REPLACEMENT_VALUE/" $CONFIGPATH
	
	#Restart Zabbix Agent
	service zabbix-agent restart
}

#Find OS and Forward to Appropriate Function
if (os_id == "ubuntu")
	then
		ubuntu
	else
    	os_ver="$(rpm -q centos-release | cut -d'-' -f3)"
		centos
fi

exit 0

Note for the Ubuntu section, the wget is commented out. If the Zabbix package isn’t already in your Ubuntu install, then uncomment that line.