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Icinga
Features
Table 1: States
Option Status
Server
o
OK
d
Down
u
Unreachable
r
Recovered
Services
o
OK
w
Warning
c
Critical
r
Recovered
u
Unknown
counter has risen every couple of
months ever since.
Icinga comprises three components:
the core, the API, and the optional
web interface. The core collects system
health information generated by
plugins and passes it via the IDOMOD
interface to the Icinga Data Out Database
(IDODB) or the IDO2DB service
daemon. The PHP-based API accepts
information from the IDODB and
displays it in a web-based interface.
Additionally, the API facilitates the
development of add-ons and plugins.
Icinga Web is designed to be a stateof-the-art
web interface that is easily
customized for administrators to keep
an eye on the state of the systems
they manage. At the time of writing,
Icinga Web was in beta, and it has a
couple of bugs that make it difficult
to recommend for production use.
If you only need to monitor a single
host, Icinga is installed easily. Some
Figure 1: If the hosts are healthy, the admin is happy.
distributions offer binaries in their repositories,
but if not, or if you prefer
to use the latest version, the easy-tounderstand
documentation includes
a quick-start guide (for the database
via libdbi with IDOUtils), which can
help you set up the network monitor
in next to no time for access at http://​
Server/​icinga. The challenges come
when you want to monitor a larger
number of computers.
Icinga can monitor the private services
on a computer, including CPU
load, RAM, and disk usage, as well as
public services like web, SSH, mail,
and so on. The lab network environment
consists of three computers, one
of which acts as the Icinga server; the
other two are a web server and a file
server that send information to the
monitoring server. Because no native
approach lets you request information
Listing 2: my_services.cfg (Excerpt)
01 # SERVICE DEFINITIONS
02 define service{
03 host_name webserver
04 service_description HTTP
05 active_checks_enabled 1
06 passive_checks_enabled 0
07 check_command check_http
08 max_check_attempts 3 ;how often to perform
the check before
Icinga notifies
09 check_interval 5
10 retry_interval 1
11 check_period 24x7
12 contacts spz_admin
13 notifications_enabled 1
14 notification_period weekdays
15 notification_interval 60
16 notification_options w,c,u,r
17 }
18 define service{
19 host_name fileserver, webserver
20 service_description SSH
21 active_checks_enabled 1
22 passive_checks_enabled 0
23 check_command check_ssh
24 max_check_attempts 3
25 check_interval 15
26 retry_interval 1
27 check_period 24x7
28 contacts admin
29 notifications_enabled 0
30 }
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