Hi,
We have been trying a few different network monitoring systems looking for a replacement for ZenOSS. We have been testing LibreNMS for a few weeks now and it seems to check all the boxes. One serious problem with ZenOSS was the disk I/O wearing out the SSDs and we were pleased to see LibreNMS is much better at minimising I/O to the disks.
Before we decide to spin up some production servers there is one issue to resolve, fast ping checking. We tried following the instructions, changing ping_rrd_step then running the rrdstep.php script (we also have the ping.php line in crontab as instructed) but this just broke the Ping Perf graphs. If you change the ping_rrd_step back to 300 and run the script again the graphs fix themselves with a little lost data. We are using the latest stable rrdtool 1.7.1
Our requirements are to get 1 minute alerting (calling an email
transport) when devices go down or come back up, we are not too bothered about the RRD ping graph, it can stay at 5 minutes, so long as we can get accurate times from the alert logs. We are still only getting alert updates every 5 minutes.
We did some testing by shutting down an interface to a test switch to trigger alerts then bringing it back up, running the ping.php script in debug mode does seem to trigger a call to RunRules() but not 100% of the time. I added the following to the includes/alerts.inc.php file in
RunRules($device_id)
$f = fopen("/opt/librenms/xxx.log", "a");
if ($f) {
fprintf($f, “RunRules “.date(‘l jS \of F Y h:i:s A’).” - Device “.$device_id.”\n”);
fclose($f);
}
This just logs when RunRules is called and despite the ping.php and alerts.php crontab entries being every minute, RunRules is still only called at 5 minute intervals. Does anyone know why this is the case, or anything we should check.
Output of ./validate.php:
-bash-4.2$ ./validate.php
| Component | Version |
|---|---|
| LibreNMS | 1.50-51-g39ff4c7 |
| DB Schema | 2019_02_10_220000_add_dates_to_fdb (132) |
| PHP | 7.2.14 |
| MySQL | 5.5.60-MariaDB |
| RRDTool | 1.7.1 |
| SNMP | NET-SNMP 5.7.2 |
====================================
[OK] Composer Version: 1.8.5
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[FAIL] Discovery has not completed in the last 24 hours.
[FIX]:
Check the cron job to make sure it is running and using discovery-wrapper.py
[WARN] Your install is over 24 hours out of date, last update: Sat, 20 Apr 2019 17:32:17 +0000
[FIX]:
Make sure your daily.sh cron is running and run ./daily.sh by hand to see if there are any errors.
[WARN] Your local git contains modified files, this could prevent automatic updates.
[FIX]:
You can fix this with ./scripts/github-remove
Modified Files:
app/Jobs/PingCheck.php