*Script* Automatic and Manual Service Restart

[Parasin]

Hi all,

This may have been posted before, but I didn't see it listed
I have created 2 separate scripts that restart Zabbix services for you.

• Automated Check and Restart: You can create a crontab entry to run the script at the interval of your choice, and it will check if the server and agent are running. If they are not, the script will start them and send an email to an admin user that the script ran.
• Manual Restart: This script automates the restart of the Zabbix Agent and Server. It can be modified so that you can restart only the services of your choosing. Once you call the script, it will stop the services and then start them back up. This removes the need for typing each individual command.

These scripts are by no means "perfect", but they DO work on RHEL6; I have tested them extensively.

If you have improvements, feel free to post your updates below
Let me know if these help you out!

Automated Check and Restart

#!/bin/bash
zabbix_server="service zabbix-server"
zabbix_agent="service zabbix-agent"
logfile=zabbix_auto_restart.log
logfilePath=/etc/scripts/zabbix/$logfile
zabbix_server_running=0
zabbix_agent_running=0

grep_agent (){
	local retval=$(ps -ef | grep -v grep | grep zabbix_agentd | wc -l)
	echo $retval
}

grep_server (){
	local retval=$(ps -ef | grep -v grep | grep zabbix_server | wc -l)
	echo $retval
}

check_zabbix_agentd (){
	if (( $(grep_agent) <= 0 ))
	then
	   $zabbix_agent start
	   echo `date` "$zabbix_agent was stopped... Restarting" >> $logfile
	   echo "************************************************" >> $logfile

	   #Send email to notify that the script ran
	   echo "$(date) $zabbix_agent was restarted from zabbix_restart.sh" | mutt -s "Zabbix Auto-restart Script Just Ran" <user email address>

	else
	   let zabbix_agent_running=1
	fi
}

check_zabbix_server (){
	if (( $(grep_server) <= 0 ))
	then
	   $zabbix_server start
	   echo `date` "$zabbix_server was stopped... Restarting" >> $logfile
	   echo "************************************************" >> $logfile

	   #Send email to notify that the script ran
	   echo "$(date) $zabbix_server was restarted from zabbix_restart.sh" | mutt -s "Zabbix Auto-restart Script Just Ran" <user email address>

	else
	   let zabbix_server_running=1
	fi
}

main_loop (){
	until ((zabbix_server_running == 1 && zabbix_agent_running == 1));
	do
		check_zabbix_agentd
		check_zabbix_server
		sleep 1.5
	done
}

main_loop

Manual Restart

#!/bin/bash
logfile=zabbix_manual_restart.log
logfilePath=/etc/scripts/zabbix/$logfile
service="zabbix-agent"
service2="zabbix-server"

grep_agent (){
	local retval=$(ps -ef | grep -v grep | grep zabbix_agentd | wc -l)
	echo $retval
}

grep_server (){
	local retval=$(ps -ef | grep -v grep | grep zabbix_server | wc -l)
	echo $retval
}

stop_services (){
	#Make sure that the zabbix-agent service is stopped
	echo `date` "Verifying $service is stopped" >> $logfilePath
	service $service stop

	#Make sure that the zabbix-server service is stopped
	echo `date` "Verifying $service2 is stopped" >> $logfilePath
	service $service2 stop

	#Double-check they are stopped, print confirmation
	if (( $(grep_agent)  == 0 )) && (( $(grep_server) == 0 ))
	then
	  echo "Zabbix Services have been stopped successfully"
	fi
}

start_agent (){
	echo `date` "Restarting $service" >> $logfilePath
	service $service start
}

start_server (){
	echo `date` "Restarting $service2" >> $logfilePath
	service $service2 start
}

service_start_loop (){
	local num_agents=$(grep_agent)
	local num_server=$(grep_server)
	
	echo "num_agents on start_service call: $num_agents"
	echo "num_agents on start_service call: $num_agents" >> $logfilePath
	echo "num_server on start_service call: $num_server"
	echo "num_server on start_service call: $num_server" >> $logfilePath
	
	#While zabbix-agent OR zabbix-server are stopped, attempt to start them
	while (( $num_agents <= 0 )) || (( $num_server <= 0 ));
	do
		if (( $num_agents <= 0  && $num_server <= 0 ))
		then
			echo "Both were stopped"
			echo "Both were stopped" >> $logfilePath
			start_agent
			start_server
		elif (( $num_server <= 0 ))
		then
			echo "Server was stopped"
			echo "Server was stopped" >> $logfilePath
			start_server
		else
			echo "Agent was stopped"
			echo "Agent was stopped" >> $logfilePath
			start_agent
		fi

		sleep 1.5
  
		num_agents=$(grep_agent)
		num_server=$(grep_server)
		echo "num_agents on start_service end: $num_agents"
		echo "num_agents on start_service end: $num_agents" >> $logfilePath
		echo "num_server on start_service end: $num_server"
		echo "num_server on start_service end: $num_server" >> $logfilePath
	done
}

#Script completed successfully, display confirmation message, and send email to user
finalize (){
	echo `date` "Zabbix services restarted successfully - script complete" >> $logfilePath
	echo "*********************************************************" >> $logfilePath
	echo "Zabbix services restarted successfully - script complete"
	echo "Log updated and saved to: $logfilePath"

	#Send email to notify that the script ran
	echo "$(date) Zabbix services were restarted from zabbix_restart.sh" | mutt -s "Zabbix Restart Script Just Ran" <user email address>
	echo "Email sent to system admin"
}

stop_services
sleep 1.5
service_start_loop
finalize

[Parasin]

Updated the scripts, improved functionality and better logging of actions taken by the script