https://www.zabbix.com/documentation/3.4/zh/manual/config/items/userparameters

設定自定義腳本
vi /etc/zabbix/zabbix_agentd.conf

### Option: Include
Include=/etc/zabbix/zabbix_agentd.d/*.conf
####### USER-DEFINED MONITORED PARAMETERS #######
UnsafeUserParameters=1

裝zabbix-get來測試，呼叫userparameter_mysql.conf查看mysql版本

yum install zabbix-get
zabbix_get -s 127.0.0.1 -p 10050 -k "mysql.version"

查看userparameter_mysql.conf內設定，可以看出下mysql.version時，執行mysql -V

UserParameter=mysql.version,mysql -V

範例:
收集apache的連線數
https://httpd.apache.org/docs/2.4/mod/mod_status.html
vi /etc/httpd/conf/httpd.conf
加入以下指令，有資安疑慮則將all改成內部IP

<Location /server-status>
    SetHandler server-
    Order allow,deny
    Allow from all
</Location>

利用curl讀網頁，並用grep篩選，awk取出要的資訊

curl -s "http://172.16.1.1/server-status?auto" | grep 'BusyWorkers' | awk '{print $2}'

寫成腳本 vi /usr/lib/zabbix/externalscripts/apache_status.sh

#!/bin/bash
ip=$1
apachestatus=http://${ip}/server-status?auto
curl -s "$apachestatus" | grep 'BusyWorkers' | awk '{print $2}'

增加zabbix自定義參數 vi /etc/zabbix/zabbix_agentd.d/userparameter_apache.conf

UserParameter=apache.status[*],/usr/lib/zabbix/externalscripts/apache_status.sh $1

zabbix agent重啟後，用get測試看看

zabbix_get -s 127.0.0.1 -p 10050 -k "apache.status[172.16.1.1]"

如果get的到資料後，回到web新增items即可