Join Zabbix Server and Zabbix Proxy, 2 MikroTik

I faced this situation that I was not able to check when Zabbix Proxy is alive and when not. This is very important cause there are no errors in Zabbix server if Zabbix proxy simply goes offline.

In my scenario, I have two MikroTik routers. In both routers, I have enabled VPN connection which will allow setting very static public DNS record.

One DNS name is zabbix server address which is used in zabbix proxy configuration file /usr/local/etc/zabbix_proxy.conf and also in zabbix agent configuration file /usr/local/etc/zabbix_agentd.conf. Second DNS address is used only to configure zabbix proxy/agent host on zabbix server side:
zabbix-proxy-as-host.png

On zabbix agent/proxy side I have to create NAT rule witch will allow zabbix server communicate with zabbix agent through port 10050:
client-side-nat-rule-for-zabbix-agent.png

On zabbix server side i have to create NAT rule witch will allow zabbix agent/proxy server receive configuration and send data back it to server via port 10051:
server-side-nat-rule-for-zabbix-proxy.png

This is how i install zabbix proxy and zabbix agent on raspberry pi model b. All comments are embeded in code:

#!/bin/bash
#this code is tested un fresh 2016-05-27-raspbian-jessie-lite.img Raspberry Pi image
#sudo raspi-config -> extend partition -> reboot
#sudo su
#apt-get update -y && apt-get install git -y
#git clone https://github.com/catonrug/raspberry-pi-zabbix.git && cd raspberry-pi-zabbix && chmod +x proxy-agent-install.sh
#time ./proxy-agent-install.sh

#update system
apt-get update -y && apt-get upgrade -y

#install all prerequsites
apt-get install sqlite3 -y #install sqlite3 database engine
apt-get install libsqlite3-dev -y #configure: error: SQLite3 library not found
apt-get install libsnmp-dev -y #configure: error: Invalid Net-SNMP directory - unable to find net-snmp-config
apt-get install libssh2-1-dev -y #configure: error: SSH2 library not found
apt-get install fping -y #/usr/sbin/fping: [2] No such file or directory

#set up zabbix user and group
groupadd zabbix
useradd -g zabbix zabbix

#extract zabbix source
tar -vzxf zabbix-*.tar.gz -C ~

#create basic database
mkdir -p /var/lib/sqlite
cd ~/zabbix-*/database/sqlite3
sqlite3 /var/lib/sqlite/zabbix.db <schema.sql

cd ~/zabbix-*/
./configure --enable-agent --enable-proxy --with-net-snmp --with-sqlite3 --with-ssh2
make install

echo
echo default zabbix_proxy.conf config file:
grep -v "^#\|^$" /usr/local/etc/zabbix_proxy.conf
echo

sed -i "s/^Server=.*$/Server=xxxxxxxxxxxx\.sn\.mynetname\.net/" /usr/local/etc/zabbix_proxy.conf #write ip address of real zabbix server
sed -i "s/^Hostname=.*$/Hostname=Broceni/" /usr/local/etc/zabbix_proxy.conf #write a name for this proxy server
sed -i "s/^DBName=.*$/DBName=\/var\/lib\/sqlite\/zabbix.db/" /usr/local/etc/zabbix_proxy.conf #set location to database
#set permissions to database
chown -R zabbix:zabbix /var/lib/sqlite/
chmod 774 -R /var/lib/sqlite
chmod 664 /var/lib/sqlite/zabbix.db
sed -i "s/^.*FpingLocation=.*$/FpingLocation=\/usr\/bin\/fping/" /usr/local/etc/zabbix_proxy.conf #/usr/sbin/fping: [2] No such file or directory

echo
echo zabbix_proxy.conf file now are:
grep -v "^#\|^$" /usr/local/etc/zabbix_proxy.conf
echo

#set up startup service
cat > /etc/init.d/zabbix_proxy << EOF
#!/bin/sh
case "\$1" in
start)
/usr/local/sbin/zabbix_proxy -c /usr/local/etc/zabbix_proxy.conf
echo "Zabbix proxy started"
;;
stop)
pkill zabbix_proxy
echo "Zabbix proxy stopped"
;;
restart)
pkill zabbix_proxy
sleep 5
/usr/local/sbin/zabbix_proxy -c /usr/local/etc/zabbix_proxy.conf
echo "Zabbix proxy restarted"
;;
*)
echo "Use start, stop, restart"
exit 1
;;
esac
EOF

#set startup service executable
chmod 755 /etc/init.d/zabbix_proxy

#re-read all startup applicaition
update-rc.d zabbix_proxy defaults

#install zabbix agent service
cp ~/zabbix-*/misc/init.d/debian/zabbix-agent /etc/init.d/

#let zabbix agent service to start up automatically at systems startup
update-rc.d zabbix-agent defaults

echo
echo default zabbix_agentd.conf config file:
grep -v "^#\|^$" /usr/local/etc/zabbix_agentd.conf
echo

#set zabbix agent configuration file
sed -i "s/^Server=.*$/Server=xxxxxxxxxxxx\.sn\.mynetname\.net/" /usr/local/etc/zabbix_agentd.conf #write ip address of real zabbix server
sed -i "s/^Hostname=.*$/Hostname=Broceni/" /usr/local/etc/zabbix_agentd.conf #write a name for this proxy server
sed -i "s/^LogFile=.*$/LogFile=\/tmp\/zabbix_agentd.log/" /usr/local/etc/zabbix_agentd.conf #destination for zabbix agent log file
sed -i "s/^ServerActive=.*$/#ServerActive=127\.0\.0\.1/" /usr/local/etc/zabbix_agentd.conf #turn off ServerActive parameter

echo
echo zabbix_agentd.conf file now are:
grep -v "^#\|^$" /usr/local/etc/zabbix_agentd.conf
echo

#set up reboot at midnight
echo "05 00 * * * root reboot">> /etc/crontab