This work was done in August. Since then, I have replaced the APC with an Eaton 5PX, and I am much happier. This might make for interesting reading, but that depends on how bored you are.. Following on from my failed calibration attempts, I thought I would try it again this morning before work. In this post: APC UPS SUA2200RM2U with a AP9619 Network Management card LibreNMS 1.66 FreeBSD 12.1 Before It’s 1132 […]
Recalibrating an APC UPS Read More »
The R720 is showing a message like this from time to time: Jan 1 07:42:20 r720-01 kernel: sonewconn: pcb 0xfffff835e785d5b8: Listen queue overflow: 8 already in queue awaiting acceptance (1 occurrences) Jan 1 08:02:21 r720-01 syslogd: last message repeated 1 times Jan 1 08:27:22 r720-01 kernel: sonewconn: pcb 0xfffff835e785d5b8: Listen queue overflow: 8 already in queue awaiting acceptance (2 occurrences) Jan 1 16:07:04 r720-01 kernel: sonewconn: pcb 0xfffff835e785d5b8: Listen queue overflow: 8 already
Listen queue overflow Read More »
When upgrading to LibreNMS 1.53.1, your website will not load. You’ll see a message saying check the logs. There will be nothing useful in the logs. I checked. Nothing. This is how I fixed the loading issue. In this post: FreeBSD 12.0 LibreNMS 1.51 running in a jail Upgrading to 1.53.1 First attempts Running as www OK, let’s run that as www. Eh? What? References Searching around, I found nothing useful. I found
upgrading to LibreNMS 1.53.1 Read More »
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
Configuring LibreNMS Nginx statistics Read More »
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
Smart quotes are not so smart: net-snmp-config –create-snmpv3-user for LibreNMS Read More »
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
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
Monitoring backups via Nagios and a shell script Read More »
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
Wireless Diagnostics on OSX – check your wifi Read More »
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”.
Monitoring temperature Read More »
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
ntp wasn’t running but Nagios didn’t notice Read More »