I have just configured an Icinga2 notification template for hosts and services to replace the ugly and impractical default one.
Not big things but useful in my opinion
Clear and nicely formatted layout
State based colors
State based icons
UTF Icons are included depending on the state of the host or service
This notifications scripts can include … Read more
Not sure since what version this feature is available but I have started to use the notes section of the services i am monitoring in Icinga in markdown syntax.
icingaweb2 package version 2.6 that is compiled for Debian 10 (Buster).
You may think you do not need it for, but in my humble opinion it is … Read more
A common task among system administrators is the renewal of SSL certificates. It is important to keep track of expiration dates so that it is not too late for us to renew it.
You can simply create an excel or some other type of record of the certificate dates, but you have to remember to check it from time … Read more
In the previous post I explained what is the difference between Icinga active and passive checks, why can be interesting to use passive checks, what is the result format Icinga is expecting when processing those checks and the way I use to send those results (instead of using snmp traps).
Now it is time to show how to configure it … Read more
As I posted long time ago for Nagios (Nagios – Using passive checks without agent), it is time to show an easy way to configure Icinga to perform passive checks (without using SNMP traps).
This is the first of two posts. In this I only want to make some theoretical explanations and then in the second I will … Read more
It is not the first time my Icinga suddenlty, stops showing the grafana graphs.
If trying to log to Grafana, admin password is not accepted. I am pretty sure i have not changed the password but I am unable to login to Grafana.
And even worse, given that I still have not configured Grafana SMTP section / admin … Read more
Here I am trying to present (I hope in an easy way to understand) some Icinga concepts (maybe also applicable in Nagios) like active and passive checks, enabling and disabling freshness checks, soft and hard states,… and the related parameters to configure them.
ACTIVE and PASSIVE services
There are two types of services:
- ACTIVE: Check initiated by the Icinga
… Read more
Maybe you have tried to execute the top command to monitor processes on a remote host.
Error remotely – Run it in batch mode
If so, the following error can be returned:
$ ssh user@remotehost top -n1
TERM environment variable not set.
top does not work remotely in the default “interactive” mode. Use the “-b” parameter to run it in … Read more
As you can see in previous posts…, Im in love with Nagios to monitor my systems… after creating some powerful, customized plugins for my Checkpoint firewalls, Exchange servers… cannot live with it… but maybe, it's "a bit" old fashioned and I have decided to try the Icinga monitoring tool. If it fits my environment, I'll have to replace my old … Read more
When suffering random network interruptions, a possible cause (and diffcult to find) is our firewall ARP table overflow. In Checkpoint systems, the Linux kernel Gaia is based on would log messages like "kernel: neighbour table overflow" to /var/log/messages.
After living two small crisis due to this problem (network scanning software and mask B networks are dangerous for the … Read more