Monitoring

Configuring LibreNMS Nginx statistics

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This post might help me in configuring net-snmp to deliver Nginx statistics to LibreNMS. As such, this post may not be as helpful to you as the official documentation. Key is this URL: http://127.0.0.1/nginx-status The nginx.conf file needs something like this: NOTE: the fastcgi_pass line might also be fastcgi_pass 10.80.0.92:9000 depending on what you find in /usr/local/etc/php-fpm.conf. You should see something like this in the script, which you might have copied from https://github.com/librenms/librenms-agent/blob/master/snmp/nginx […]

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Smart quotes are not so smart: net-snmp-config –create-snmpv3-user for LibreNMS

4 Comments / FreeBSD, LibreNMS, snmp / By /

NOTE: If you are looking to configure net-mgmt/net-snmp for the first time, the latest article is Configuration of net-mgmt/net-snmp on FreeBSD. I wasted a few hours today trying to figure out why special characters in passwords were causing problems. I was chasing the wrong problem. Conclusion: smart quotes are dumb. Full disclosure: I should have seen the problem. The problem is not with LibreNMS. Here is my procedure for creating an snmp read-only

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Munin

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This is an old post I wrote, but never published, back in 2010. I’ve started using Munin for some statistical monitoring. Using the hddtemp_smartctl plugin, I was getting some permission errors. After printing the output of the command, I noticed these in the logs: 2010/03/11-18:30:05 [60845] [ERROR] Command /usr/local/sbin/smartctl -A /dev/ad8 on drive ad8 failed: 256. The plugin needs to have read permission on all monitored devices. smartctl 5.39 2009-12-09 r2995 [FreeBSD 8.0-STABLE

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Monitoring backups via Nagios and a shell script

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Backups are useless without restores. I’ve written a few posts about Nagios, my current monitoring tool of choice. Included with Nagios are a number of plugins and you can even write your own plugins. In this post, I’ll show you a shell script I wrote to make sure my backup files turn up where they should, when they should. In my case, these files are database backups, but the idea behind the script

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Wireless Diagnostics on OSX – check your wifi

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I wanted to know how many wireless access points (WAPs) were using what channels near my place. I googled and found a reference to the built-in OSX tool, Wireless Diagnostics. But to be fair, the app is hidden. To access the app, hold the Command key while clicking on the WIFI icon. This will change what usually appears: Now click on Wireless Diagnostics. The following should appear. This is the boring part. Not

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Monitoring temperature

2 Comments / Network monitoring / By /

Earlier today, I was reminded of a old series of tweets regarding temperature. That led me to this to a FreeBSD Forums post which showed me this interesting bit of information. I draw your attention to the two hw.acpi.thermal values near the top. Those may well represent the ambient room temperature, more or less. A little shell script. Some graphing. Bob’s yer uncle. # kldload coretemp # sysctl -a | grep -i “temp”.

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ntp wasn’t running but Nagios didn’t notice

3 Comments / Nagios, Network monitoring / By /

Earlier today, I noticed the following output from a Bacula job: 24-Sep 14:14 bacula-dir JobId 38548: Start Backup JobId 38548, Job=latens_home.2010-09-24_14.12.38_31 24-Sep 14:14 bacula-dir JobId 38548: Using Device “MegaFile-latens” 24-Sep 14:09 latens-fd JobId 38548: DIR and FD clocks differ by -307 seconds, FD automatically compensating. That’s 5 minutes. It shouldn’t be varying by that much. So I started ntp. That’s when I noticed it was not being started by /etc/rc.conf. But I thought

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NRPE: Unable to read output

1 Comment / Nagios, Network monitoring, Open Source / By /

After rebooting kraken to take a photo, I found nagios was displaying an error for my smartmon checks: NRPE: Unable to read output. Running the command by hand on the nagios server, I found: $ /usr/local/libexec/nagios/check_nrpe2 -H kraken -c check_smartmon_ad24 NRPE: Unable to read output But from the remote server I got: # /usr/local/libexec/nagios/check_smartmon -d /dev/ad24 OK: device is functional and stable (temperature: 29) I restarted npre and the problem went away… not

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