Esta dica é pra você, que configurou o Zabbix no CentOS 7 e está quebrando a cabeça para fazer com que o Zabbix inicie automaticamente através do ntsysv.

# vim /etc/init.d/zabbix_server
#!/bin/bash
#
# chkconfig: - 85 15
# description: zabbix server daemon
#

### BEGIN INIT INFO
# Provides: zabbix
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Default-Start:
# Default-Stop: 0 1 2 3 4 5 6
# Short-Description: start and stop zabbix server
# Description: Zabbix Server
### END INIT INFO

# zabbix details
ZABBIX=/usr/sbin/zabbix_server
CONF=/etc/zabbix/zabbix_server.conf
PIDFILE=/var/run/zabbix/zabbix_server.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0

[ -x $ZABBIX ] || exit 5
[ -e $CONF ] || exit 6
RETVAL=0
case "$1" in
start)
echo -n "Starting zabbix server: "
daemon $ZABBIX -c $CONF
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/zabbix
;;
stop)
echo -n "Shutting down zabbix server: "
killproc zabbix_server
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/zabbix
;;
restart|reload)
$0 stop
$0 start
RETVAL=$?
;;
status)
status zabbix_server
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|restart|reload|status}"
exit 1
;;
esac
exit $RETVAL
# vim /etc/init.d/zabbix_agentd
# !/bin/bash
#
# chkconfig: - 85 15
# description: zabbix agent daemon
#

### BEGIN INIT INFO
# Provides: zabbix-agent
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Default-Start:
# Default-Stop: 0 1 2 3 4 5 6
# Short-Description: start and stop zabbix agent
# Description: Zabbix Agent
### END INIT INFO

# zabbix details
ZABBIX_AGENTD=/usr/sbin/zabbix_agentd
CONF=/etc/zabbix/zabbix_agentd.conf
PIDFILE=/var/run/zabbix/zabbix_agentd.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network                                                                       
                                                                                                 
# Check that networking is up.                                                                     
[ ${NETWORKING} = "no" ] && exit 0                                                                   
                                                                                                       
[ -x $ZABBIX_AGENTD ] || exit 5                                                                           
[ -e $CONF ] || exit 6                                                                                      
RETVAL=0                                                                                                       
case "$1" in                                                                                                     
start)                                                                                                              
echo -n "Starting zabbix agent: "                                                                                    
daemon $ZABBIX_AGENTD -c $CONF                                                                                         
RETVAL=$?                                                                                                                
echo                                                                                                                        
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/zabbix-agent                                                                                       
;;                                                                                                                                             
stop)                                                                                                                                          
echo -n "Shutting down zabbix agent: "
killproc zabbix_agentd
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/zabbix-agent
;;
restart|reload)
$0 stop
$0 start
RETVAL=$?
;;
status)
status zabbix_agentd
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|restart|reload|status}"
exit 1
;;
esac
exit $RETVAL
[root@localhost ~]# reset
[root@localhost ~]# cat /etc/init.d/zabbix_agentd 
# !/bin/bash
#
# chkconfig: - 85 15
# description: zabbix agent daemon
#

### BEGIN INIT INFO
# Provides: zabbix-agent
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Default-Start:
# Default-Stop: 0 1 2 3 4 5 6
# Short-Description: start and stop zabbix agent
# Description: Zabbix Agent
### END INIT INFO

# zabbix details
ZABBIX_AGENTD=/usr/sbin/zabbix_agentd
CONF=/etc/zabbix/zabbix_agentd.conf
PIDFILE=/var/run/zabbix/zabbix_agentd.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0

[ -x $ZABBIX_AGENTD ] || exit 5
[ -e $CONF ] || exit 6
RETVAL=0
case "$1" in
start)
echo -n "Starting zabbix agent: "
daemon $ZABBIX_AGENTD -c $CONF
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/zabbix-agent
;;
stop)
echo -n "Shutting down zabbix agent: "
killproc zabbix_agentd
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/zabbix-agent
;;
restart|reload)
$0 stop
$0 start
RETVAL=$?
;;
status)
status zabbix_agentd
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|restart|reload|status}"
exit 1
;;
esac
exit $RETVAL

Tornar os arquivos executáveis:

# chmod +x /etc/init.d/zabbix_server
# chmod +x /etc/init.d/zabbix_agentd

Adicionar o serviço ao sistema:

# chkconfig --add /etc/init.d/zabbix_server
# chkconfig --add /etc/init.d/zabbix_agentd

Ativar inicialização automática:

# ntsysv

ntsysv

Referência: zabbixbrasil.org