This is Apache template made by me for testing the following :

1.500 error - a trigger will pop if the item has discovered 10 500 error code for the past hour + real time.

2.404 error - a trigger will pop if the item has discovered 100 404 error code for the past minute + mealtime.

3. Graph for 404 and 500 error

4. SSL cert expire check - will fire a trigger 30 days before expiration.

how to implant:

1. add the xml template to Configuration -> Templates.

2. adding scripts : cert_expire.sh , 404.total.sh, 404err.sh, 500.total.sh, 500err.sh to youre

/home/zabbix/ or your own path of zabbix scripts. 

3. add permission for scripts:

chmod +x SCRIPTNAME

chown zabbix. SCRIPTNAME

4. add this user parameter to /etc/zabbix/zabbix_agent.conf

at the end of the file you will find all user param, add this template param at the end of the file :

UserParameter=500.err,/home/zabbix/500err.sh

UserParameter=cert.exp,/home/zabbix/cert_expire.sh

UserParameter=graf.500,/home/zabbix/404.total.sh

UserParameter=graf.404,/home/zabbix/500.total.sh

UserParameter=404.err,/home/zabbix/404err.sh

 dont forget to restart zabbix_agent after adding this parameters

only after that you can assign the template to a host.

of course change /home/zabbix/ to your own path if needed.

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Remember- change the scripts as you need.

for example, the cert script contains my file of certs as a variable -

change DIR var at the script to your file.

script check for crt,ca type of certs.

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And error code scripts read file /var/log/httpd/ssl_access_log

change it as you need.

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let me know if all went OK :)