NAGIOS Monitoring
solution for JBoss :
1. Performed the below on server where Nagios
is installed:
Defined the host, jhostip and contact group in host.cfg :
under /usr/local/nagios/etc/objects
define host{
use linux-server ; Name of host template to use
; This host definition will inherit all variables that are defined
; in (or inherited by) the linux-server host template definition.
host_name Prod***-APP1
alias Prod***-APP1
contact_groups jboss-admin
notifications_enabled 1
address 10.1.*.***
}
define host{
use linux-server ; Name of host template to use
; This host definition will inherit all variables that are defined
; in (or inherited
by) the linux-server host template definition.
host_name Prod***-APP2
alias Prod***-APP2
contact_groups jboss-admin
notifications_enabled 1
address 10.1.*.***
}
2. In the services.cfg, defined the services
to be monitored like ping, 8080 port, load :
Define a service to
check HTTP on the local machine.
# Disable
notifications for this service by default, as not all users may have HTTP
enabled.
define service{
use local-service ; Name of service template to use
host_name App1
service_description HTTP
check_command check_http!-p 8080
check_interval 1
notifications_enabled 0
max_check_attempts 4
event_handler check_stopjb
3. Since PRODUCTION had multiple servers,
defined multiple services.cfg file, specific to each host to be monitored. For
example below, I have defined 2 services.cfg file for 2 Jboss hosts:
[ec2-user@prodnagios-server
prod_services]$ ls -ltr
total 88
-rw-r--r-- 1 nagios
nagios 4363 Jun 23 2015 services.cfg
-rw-r--r-- 1 nagios
nagios 5130 Jul 21 2015 prodAP1_Services.cfg
-rw-r--r-- 1 nagios
nagios 4832 Jul 21 2015 prodAP2_Services.cfg
-
[ec2-user@prodnagios-server
prod_services]$ pwd
/usr/local/nagios/etc/objects/prod_services
And each file have entries of services to be monitored like
example:
define service{
use local-service ; Name of service template to use
host_name Prod***-APP1
service_description HTTP
check_command check_http!-p 8080
check_interval 1
notifications_enabled 1
notification_options w,u,c,r
contact_groups jboss-admin
max_check_attempts 4
# event_handler check_stopjb
}
4. All the above changes, have defined in main
Nagios config file: Nagios.conf:
# prod services
cfg_file=/usr/local/nagios/etc/objects/prod_services/prodAP1_Services.cfg
cfg_file=/usr/local/nagios/etc/objects/prod_services/prodAP2_Services.cfg
# Definitions for
monitoring the local (Linux) host
cfg_file=/usr/local/nagios/etc/objects/host.cfg
5. Made sure 8080,22 and all required ports
are reachable to Jboss hosts by putting Nagios to appropriate security group in
AWS. And also Nagios nrpe plugin is installed on all Jboss servers.
And ran the verify to make sure the configuration worked
fine :
[ec2-user@prodnagios-server
etc]$ sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Nagios Core 4.0.8
Copyright (c)
2009-present Nagios Core Development Team and Community Contributors
Copyright (c)
1999-2009 Ethan Galstad
Last Modified:
08-12-2014
License: GPL
Website:
http://www.nagios.org
Reading configuration
data...
Read main config file okay...
Read object config files okay...
Running pre-flight
check on configuration data...
Checking objects...
Checked 77 services.
Checked 12 hosts.
Checked 1 host groups.
Checked 0 service groups.
Checked 6 contacts.
Checked 1 contact groups.
Checked 35 commands.
Checked 5 time periods.
Checked 0 host escalations.
Checked 0 service escalations.
Checking for circular
paths...
Checked 12 hosts
Checked 0 service dependencies
Checked 0 host dependencies
Checked 5 timeperiods
Checking global event
handlers...
Checking obsessive
compulsive processor commands...
Checking misc
settings...
Total Warnings: 0
Total Errors: 0
Things look okay - No
serious problems were detected during the pre-flight check
6.
Could monitor the Jboss through console:
7. Also defined my email and Mobile to get
alerts in contacts.cfg file:
The contacts.cfg file must be defined in Nagios.cfg file as
well:
# host groups,
contacts, contact groups, services, etc.
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg
define contact{
contact_name SandeshSMS ; Short name of user
use
generic-contact ; Inherit
default values from generic-contact template (defined above)
alias Nagios Admin ; Full name of user
email **********@txt.att.net ; <<***** CHANGE THIS TO YOUR
EMAIL ADDRESS ******
service_notifications_enabled 1
}
define contact{
contact_name Sandesh ; Short name of user
use
generic-contact ; Inherit
default values from generic-contact template (defined above)
alias Nagios Admin ; Full name of user
email Sandesh.achar@********.com ; <<***** CHANGE THIS TO YOUR
EMAIL ADDRESS ******
service_notifications_enabled 1
}
