Icinga2 agent on Ubutnu Semaphore Usage

Icinga 2
1

I have Icinga2 2.13.3-1 running on Ubuntu 18. On two servers it is fine but I’ve just set it up on a third and when running it keeps using Semaphores and not releasing them. I have to stop Icinga2 and manually remove them. After 1 hour of running it’s using 4000. By comparison the other ubuntu hosts, running the same version, have been online for months and they are using 9…

Any ideas??

# icinga2 --version
icinga2 - The Icinga 2 network monitoring daemon (version: r2.13.3-1)

Copyright (c) 2012-2023 Icinga GmbH (https://icinga.com/)
License GPLv2+: GNU GPL version 2 or later <https://gnu.org/licenses/gpl2.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

System information:
  Platform: Ubuntu
  Platform version: 18.04.6 LTS (Bionic Beaver)
  Kernel: Linux
  Kernel version: 4.15.0-206-generic
  Architecture: x86_64

Build information:
  Compiler: GNU 8.4.0
  Build host: runner-hh8q3bz2-project-298-concurrent-0
  OpenSSL version: OpenSSL 1.1.1  11 Sep 2018

Application information:

General paths:
  Config directory: /etc/icinga2
  Data directory: /var/lib/icinga2
  Log directory: /var/log/icinga2
  Cache directory: /var/cache/icinga2
  Spool directory: /var/spool/icinga2
  Run directory: /run/icinga2

Old paths (deprecated):
  Installation root: /usr
  Sysconf directory: /etc
  Run directory (base): /run
  Local state directory: /var

Internal paths:
  Package data directory: /usr/share/icinga2
  State path: /var/lib/icinga2/icinga2.state
  Modified attributes path: /var/lib/icinga2/modified-attributes.conf
  Objects path: /var/cache/icinga2/icinga2.debug
  Vars path: /var/cache/icinga2/icinga2.vars
  PID path: /run/icinga2/icinga2.pid
2

are you trying to create a “three master”-setup?
that’s not supported

3

Also not supported for any other zone besides the master zone as well.

1 Like
4

Only one master - the systems I was talking about are all running agents (the master is a seperate server).

Two of the agents work fine but the third keeps consuming and not releasing semaphores. OS and Icinga code and even configuration are the same on all three.

5

Every Agent is in it’s own zone?

6

It is - but only because that was the way I got it working a few years ago - I wasn’t sure if it was the right way or not…

7

It is the right way as you can have only 2 nodes per zone and all endpoints need to belong to a zone:

Master Zone: master1 [& master2]

[Satellite X Zone: satellite_X_1 [& satellite_X_2]]

Agent Y Zone: agent_Y
means optional

So in the end I also only have one zone per agent and I call both the endpoint and the zone by the FQDN of the host the agent is running on.

8

off topic but how did you get Icinga 2.13 running on bionic?

9

Hello @rudders!

Which “Semaphores” and how to list the unreleased ones?