Apache running but Zabbix shows not running. Why?

[lostmarbles]

Hello, all is well with our new Zabbix install, thanks for the support. One question, why do we this this trigger as TRUE:

Apache is not running on www.server.com
{www.server.com:proc.num[httpd].last(0)}<1

When, in fact Apache is running very well?

root@www:~# ps aux | grep httpd
root     16885  0.0  0.0   5164   848 pts/0    S+   13:27   0:00 grep httpd
root@www:~# ps aux | grep apache
www-data  2694  0.4  0.1 350492 32468 ?        S    08:49   1:10 /usr/sbin/apache2 -k start
www-data  2768  0.5  0.1 352964 29944 ?        S    12:03   0:25 /usr/sbin/apache2 -k start
www-data  3022  0.4  0.1 350152 30016 ?        S    08:51   1:07 /usr/sbin/apache2 -k start
www-data  3340  0.4  0.2 352792 33480 ?        S    08:52   1:13 /usr/sbin/apache2 -k start

Perhaps the zabbix agent looks for the string "httpd" and not "apache2" ?

If so, how do the update this?

Thanks!

[Calimero]

Apache is not running on www.server.com
{www.server.com:proc.num[[B]httpd[/B]].last(0)}<1

...
Perhaps the zabbix agent looks for the string "httpd" and not "apache2" ?

Indeed.

If so, how do the update this?

Update the proc.num[httpd] item to proc.num[apache2] for your host or on template level. Trigger will be automatically updated.

[lostmarbles]

Update the proc.num[httpd] item to proc.num[apache2] for your host or on template level. Trigger will be automatically updated.

Thanks!

So, I can do all this on on the server side in the Configuration-->Item part of the Control Panel, and no need to do anything on the agent side at all?

[izabbuse]

hi,

your trigger is testing for "httpd",
when you type "ps -aux |grep httpd" it return "grep httpd" and not the service "httpd".
so you can try to test "apache2" and not "httpd" (there is no httpd service with apache2)

[Calimero]

So, I can do all this on on the server side in the Configuration-->Item part of the Control Panel, and no need to do anything on the agent side at all?

Yes, all the built-in/native checks supported by zabbix_agent can be configured remotely.

Only UserParameters (that is: custom scripts run by zabbix_agent) require some tweaking on agents. But even UserParameter scripts can be given arguments and as such can be quite flexible.

E.g:
UserParameter=my.mysql.checks[*],/usr/local/zabbix/scripts/mysql_checks.php $1 $2 $3 $4

When you configure on the server item 'my.mysql.checks[variables,Com_select]', zabbix_server will connect to zabbix_agent, request item 'my.mysql.checks[variables,Com_select]'.
zabbix_agent will then run "/usr/local/zabbix/scripts/mysql_checks.php" with the supplied args, that is to say: "/usr/local/zabbix/scripts/mysql_checks.php variables com_select". Your script would then process accordingly and return the expected value which zabbix_agent would give to zabbix_server.

You could then have a single script do all mysql related checks instead of having specific scripts for each item you want to poll regarding mysql.

[lostmarbles]

Hi, well, lostmarbles, me, LOL. I am not finding this to be the case.

For example, in this ZABBIX agent:

WEB (HTTP) server is running  net.tcp.service[http]

Even when disabled in Configuration-->Items it will not let me edit net.tcp.service[http]

So, I don't see how to edit http and change it to apache2 if it will not permit me to edit.

Why can't I edit it when I have full read-write permissions and these items are disabled?

[MrKen]

If you can't edit the host directly, then it is probably a Template.

Edit the Template that the host is attached to.

Hope this helps you find your marbles.

MrKen

[lostmarbles]

Thanks! Well, my marbles are still lost

In my post above, I was trying to edit the Template in the control panel.

Perhaps I am confused about the use of terminology

Maybe someone could kindly just simply put down the necessary steps to change http to apache2 in the template? Because, when I try to do it via the configuration panel, it will not permit me to edit.

Thanks!

[Calimero]

Go to Configuration > Items.
Top right: choose group and then your host.

All items for that host are displayed.

Look at the Description column. You probably have something like:

Template_Name : Item Description

Click on the template name. It will then switch you to the "Config > Items" screen for the template. You will then be able to edit items and changes will be propagated to all hosts using the template.

[lostmarbles]

Hi Calimero!

Thanks for your kind reply. That is *exactly* what I did (many time, btw) and for this template item:

Template_Linux:WEB (HTTP) server is running	net.tcp.service[http]

.. when I click on the description I cannot edit or update the first six fields:

• Description
• Type
• Key
• Type of information
• Units
• Use multiplier

However, I can update all the rest of the fields:

• Update interval
• Flexible intervals
• New flexible interval
• Keep history
• Keep trends
• Status
• Store value
• Show value throw map
• Applications

Hence, my marbles still lost I cannot edit the template key and change http to apache2

Any idea why not?

[Calimero]

Template_Linux:WEB (HTTP) server is running	net.tcp.service[http]

If that's what you see, then you're not displaying items for Template_Linux but for a child template or for a host using Template_Linux.

Click on "Template_Linux" to show items for Template_Linux. And keep "going up" recursively as long as there's as "Template_XXX:" prefix in front of description.

[lostmarbles]

Hi Calimero!

Thanks!! That worked fine.

Item 'www.server.com: proc.num[apache2]' updated
Item 'Template_Linux: proc.num[apache2]' updated

We updated Template_Linux and it automatically updated the instance that was associated with the server.

Thanks again