Dispatcher service and webui

Help
#1

librenms version: [21.1.0-7-ge42a6e36a - Tue Feb 02 2021 10:39:20 GMT-0700]
OS version ubuntu 20.04.2

When settuping the dispatcher service, the dispatcher runs the discovery service every minute instead of running it in intervalls.

The webui configuration section for the poller, https://hostname/settings/poller/distributed have been configured, but do not appear to be saved anywhere. Am I correct in that the settings for the dispatcher service should be stored in the poller_cluster table for the correctly named poller?

Thanks!

Steve

#2

Yes, when you start the dispatch service by hand it should report the values it is using. What does it say?

#3

This is what it shows when starting:

librenms2(INFO):Groups: [0]
librenms2(INFO):Discovery QueueManager created: 12 workers, 21600s frequency
Discovery_0-1(INFO):Creating queue discovery:0
Discovery_0-1(INFO):Created redis queue with socket_timeout of 60s
librenms2(INFO):Using pure python SQL client
librenms2(INFO):Groups: [0]
librenms2(INFO):Services QueueManager created: 8 workers, 300s frequency
Services_0-1(INFO):Creating queue services:0
Services_0-1(INFO):Created redis queue with socket_timeout of 60s
librenms2(INFO):Using pure python SQL client
librenms2(INFO):Groups: [0]
librenms2(INFO):Ping QueueManager created: 1 workers, 60s frequency
Ping_0-1(INFO):Creating queue ping:0
librenms2(INFO):Using pure python SQL client
Ping_0-1(INFO):Created redis queue with socket_timeout of 60s
librenms2(INFO):LibreNMS Service: librenms2-0b4f32aa-6ce2-11eb-910c-3925afdf6a9d started!
librenms2(INFO):Poller group 0 (default). Using Python 3.8.5 and redis locks and queues
librenms2(INFO):Maintenance tasks will be run every 1 day, 0:00:00
librenms2(INFO):librenms2 is now the master dispatcher
Poller_0-1(INFO):Polling device 106

The problem is that the web interface is

poller-image
poller-image841×328 29.3 KB

With some more testing, I found that if I update the mysql table poller_cluster with the values that I want, then the poller service will read thos values at startup.

With that information, it appears I have two issues.

  1. The webui is not updating the poller_cluster mysql table.
  2. By looking at the log, it appears that the polling queuing is not working correctly – this might because there are still some null values in the poller_cluster table for poller node.
#4

FYI,your screenshot shows the global settings ui to set the default values. If you have set a value in the poller settings it will override these values. (null indicates use the system defaults)

#5

I think I have found the issue. After digging some more there appears to be an error in the discovery when I have the entity state discovery module enabled. This error causes the discovery to never finish which always causes the discovery polling to happen over and over.

When I run the discovery.php -h 7 by hand, this is the error message that is printed to the screen (I grabbed more than just the error so that one has some context of what is happening) :

Load disco module entity-physical

Caching OIDs: entPhysicalEntry entAliasMappingIdentifier…

Runtime for discovery module ‘entity-physical’: 0.4070 seconds with 6760 bytes
SNMP: [1/0.05s] MySQL: [37/0.02s] RRD: [0/0.00s]

Unload disco module entity-physical

Load disco module entity-state

Entity States: +++++++++++++++++++++++
In Grammar.php line 136:

Argument 1 passed to Illuminate\Database\Grammar::parameterize() must be of
the type array, string given, called in /opt/librenms/vendor/laravel/frame
work/src/Illuminate/Database/Query/Grammars/Grammar.php on line 886

When I disabled the entity state module, then the discovery polling finished and updated the time in the database.

What is the next step that I need to do for this since I am not very familiar with the laravel framework.

Steve

#6

I have tracked down this issue to the configuration of the mellanox switch that is tried to be polled. It appears that librenms does not like to poll the entity-state and the route module against this switch. The one thing that is different on this switch is that it has a 2nd vrf in it besides the normal default.