Допустим мы хотим протестировать результат ответа

UserParameter = mount.check,/home/zabbix/mount.check.sh

Тогда на Zabbix-server выполняем:

zabbix_get -s AGENT_HOST 10050 -k "mount.check"

где AGENT_HOST  — хост или IP zabbix-agent

Для Windows добавляем в zabbix_agent.conf или отдельный конфиг-файл:

UserParameter=ntp.client.offset,powershell.exe -command "$timeoffset = &w32tm /stripchart /dataonly /computer:master-time-server.fqdn /samples:1; [float]$timeoffset[3].split(' ')[1].TrimEnd('s').TrimStart('+') * 1000"

Для Linux:

UserParameter=ntp.client.offset,/usr/sbin/ntpq -pn | /usr/bin/awk 'BEGIN { offset=1000 } $1 ~ /\*/ { offset=$9 } END { print offset }'

В параметрах хоста создаем Item с параметрами:
Name: System local time
key: system.localtime[utc]
type: Numeric (float)
units: ms

Тригер

Clock skew too high on {HOST.HOST}

{SERVER:system.localtime[utc].fuzzytime(350)}=0

где 350 — разница в мс

Источник zabbix

==> /var/log/zabbix/zabbix_proxy.log <==

Cannot find module (IF-MIB): At line 1 in (none)
MIB search path: $HOME/.snmp/mibs:/usr/share/snmp/mibs:/usr/share/snmp/mibs/iana:/usr/share/snmp/mibs/ietf:/usr/share/mibs/site:/usr/share/snmp/mibs:/usr/share/mibs/iana:/usr/share/mibs/ietf:/usr/share/mibs/netsnmp
Cannot find module (IF-MIB): At line 1 in (none)
Cannot find module (SNMPv2-MIB): At line 1 in (none)
Cannot find module (IF-MIB): At line 1 in (none)
Cannot find module (SNMPv2-MIB): At line 1 in (none)
Cannot find module (IF-MIB): At line 1 in (none)

Решение

sudo apt-get install snmp-mibs-downloader
sudo download-mibs
sudo sed -i "s/^\(mibs *:\).*/#\1/" /etc/snmp/snmp.conf
sudo service snmpd restart
service snmpd status
service zabbix-proxy restart
service zabbix-proxy status

Также может возникнуть проблема установки пакета snmp-mibs-downloader, то о решении проблемы — ручной установке, можно прочесть по ссылке snmp-mibs-downloader

root@zabbix:~# apt install zabbix-server-mysql zabbix-frontend-php zabbix-agent 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 zabbix-frontend-php : Depends: ttf-dejavu-core but it is not installable or
                                ttf-japanese-gothic but it is not installable
                       Depends: php-mbstring but it is not installable
                       Depends: php-bcmath but it is not installable
 zabbix-server-mysql : Depends: libiksemel3 (>= 1.2) but it is not installable
                       Depends: libssh2-1 (>= 1.0) but it is not installable
                       Depends: fping but it is not installable
                       Recommends: virtual-mysql-server
E: Unable to correct problems, you have held broken packages.

Решение:

vim /etc/apt/sources.list

###### Ubuntu Main Repos
deb http://us.archive.ubuntu.com/ubuntu/ bionic main universe
deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main universe

###### Ubuntu Update Repos
deb http://us.archive.ubuntu.com/ubuntu/ bionic-security main universe
deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe
deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-security main universe
deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe 

Источник