Run a curl command from local agent, alert on error

[4h3XOZ2kDRWeD4SiHUIh]

I'd like to be able to run a curl command from a local agent (web server running Zabbix agent), and have it alert if the curl returns an error. I want it to work similar to a web check.

I don't want to use a web check, unless it can be configured to run from the agent, instead of from the Zabbix server.

The reason is that each customer will have a different URL, and I want to define the URL in the Zabbix template, so that all servers with the template applied will check for:

curl https://${customer_name}.mydomain.com/myapplication

...where $customer_name is defined as an environment variable on each webserver.

Otherwise, I have to create a different web check for each customer, and that just sounds laborious and tedious.

Is there a way to do this in Zabbix?

[jan.garaj]

1.) run it on zabbix-server
But define new macro with customer name per host e.g. $CUSTOMER_NAME
Then you can define URL in standard Zabbix web check

https://{$CUSTOMER_NAME}.mydomain.com/myapplication

Check $MACRO in manual https://www.zabbix.com/documentation...ed_by_location

2.) run it from local zabbix-agent
But use your environment variable (be sure that's environment variable also for zabbix user):

curl https://{$customer_name}.mydomain.com/myapplication

I'll prefer 1st option, because in that case I don't need to deploy any new userparameters to zabbix-agent + I don't utilize zabbix-agent, but I use very quick and optimized webcheck code on the zabbix server.

But I also use 2nd option to check localhost performance with timeout feature. My implementation:

webcheck[[url]http://127.0.0.1:80/index.html,5][/url]
UserParameter=webcheck[*],responsetime=`/usr/bin/curl -s -o /dev/null --connect-timeout $2 --max-time $2 --write-out '%{time_total}' -k "$1"`; if [ $$? != "0" ]; then printf "0"; else printf "%f" $responsetime; fi

[4h3XOZ2kDRWeD4SiHUIh]

Thank you.

I've got a curl bash script that can output the reponse code to either the shell, or standard error.

However, no matter what, it only returns "1" to Zabbix.

Right now, I'm just using the "date" command to test.

#My_Script.sh
date >> /var/log/zabbix/system_run_log

#My Item
system.run[My_Script.sh,nowait]

#My Trigger, triggers if response is not equal to 200
{My_Template:system.run[My_Script.sh,nowait].last(0)}#200

#My Zabbix Log
163026.771 Requested [system.run[My_Script.sh,nowait]]
163026.771 Executing command 'My_Script.sh'
163026.772 Sending back [1]
...
163056.771 Requested [system.run[My_Script.sh,nowait]]
163056.771 Executing command 'My_Script.sh'
163056.772 Sending back [1]

#My /var/log/zabbix/system_run_log
Wed Dec 10 16:30:26 PST 2014
Wed Dec 10 16:30:56 PST 2014

So the script is running, it should be exiting with Status Code 0, but no matter what, the Zabbix item always shows a last value of "1".

I've tried echo to standard out, and exit 0, exit 200, exit $myvariable. In all of these scenarios, the Zabbix Item value is always "1".

What am I doing wrong?

-CS

[jan.garaj]

Manual is your friend:

https://www.zabbix.com/documentation/2.4/manual/config/items/itemtypes/zabbix_agent

You are using nowait mode, so you don't wait for the output/exit code.
If you use it wait mode, than you will see output (not exit code) from the command, so you output from your script should be exit code only "command &>/dev/null; echo $?" Or in your case script output should be http code.