Monitoring Apache with LARRD and Big Brother
I managed to figure out how to monitor Apache with Big Brother and LARRD. As it's not very well documented I thought I'd share it with everyone.
First set your apache server to display status in the apache httpd.conf:
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<Location /server-status>
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SetHandler server-status
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Order deny,allow
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Deny from all
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Allow from 127.0.0.1
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</Location>
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ExtendedStatus On
Setting extended status to On does slow down the server a little bit, but it's usually not noticeable. Remember to limit access to the status page to just the IP where your Big Brother server is monitoring from.
Add apache to @DATALIST in larrd-config.pl
Then in your apache-larrd.pl (under the larrd directory) you'll need to hardcode the servers you want to monitor.
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%host_h = (
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'server01' => {
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port => "80",
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url => "http://www.yoursite.com/server-status?auto",
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}
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);
The first part of the host_h array is to identify which server to attach the RRD file with. In this instance I'm monitoring a server called server01 and the website I have setup with the server-status page is http://www.youresite.com/server-status?auto. If your host is a FQDN (fully qualified domain name) then you can omit the full url and just have /server-status?auto and Big Brother will work out the URL.
With any luck you'll have 4 new graphs on your trends/LARRD page.