Error: Could not read host and service status information! - Nagios
Danny Russell
drussell at mpifix.com
Fri May 6 23:25:40 CEST 2005
Hello,
I am having a little difficulty getting Nagios working 100%. My box is
CentOS 4.0. All packages are up to date. I installed the following to
get Nagios to install via RPM:
* nagios-1.2-2.2.el4.rf.i386.rpm
* nagios-plugins-1.4-2.2.el4.rf.i386.rpm
* fping-2.4-1.b2.2.el4.rf.i386.rpm
* perl-Crypt-DES-2.03-3.2.el4.rf.i386.rpm
* perl-IO-Socket-INET6-2.51-1.2.el4.rf.noarch.rpm
* perl-Net-SNMP-5.0.1-1.2.el4.rf.noarch.rpm
* perl-Socket6-0.18-1.2.el4.rf.i386.rpm
My problem is that the web cgi pages are not working. On all the pages
under the monitoring section I am getting:
Whoops!
Error: Could not read host and service status information!
The most common cause of this error message (especially for new users),
is the fact that Nagios is not actually running. If Nagios is indeed not
running, this is a normal error message. It simply indicates that the
CGIs could not obtain the current status of hosts and services that are
being monitored. If you've just installed things, make sure you read the
documentation on starting Nagios.
Some other things you should check in order to resolve this error
include:
1. Check the Nagios log file for messages relating to startup or
status data errors.
2. Always verify configuration options using the -v command-line
option before starting or restarting Nagios!
3. Make sure you've compiled the main program and the CGIs to use
the same status data storage options (i.e. text file or database). If
the main program is storing status data in a text file and the CGIs are
trying to read status data from a database, you'll have problems.
Make sure you read the documentation on installing, configuring and
running Nagios thoroughly before continuing. If all else fails, try
sending a message to one of the mailing lists. More information can be
found at http://www.nagios.org.
My log files show that things are being pinged correctly and are a
success:
[root at scp nagios]# tail /var/log/nagios/status.log
# Nagios 1.2 Status File
[1115414560] PROGRAM;1115414530;18051;1;0;0;1;1;1;1;0;0;1;0
[1115414560]
HOST;brentbrown;UP;1115414386;1115401491;0;13027;0;0;0;0;1;1;1;1;0;0.00;
0;1;1;PING OK - Packet loss = 0%, RTA = 25.41 ms
[1115414560]
HOST;techops_lab;UP;1115414476;1115401686;0;12672;0;0;0;0;1;1;1;1;0;0.00
;0;1;1;PING OK - Packet loss = 0%, RTA = 63.46 ms
[1115414560] SERVICE;brentbrown;Netscreen
Ping;PENDING;0/3;HARD;0;1115414620;ACTIVE;1;1;1;0;0;OK;0;0;0;0;0;0;1;0;0
;1;0;0.0;0;1;1;1;Service check scheduled for Fri May 6 15:23:40 2005
[1115414560] SERVICE;techops_lab;Netscreen
Ping;PENDING;0/3;HARD;0;1115414710;ACTIVE;1;1;1;0;0;OK;0;0;0;0;0;0;1;0;0
;1;0;0.0;0;1;1;1;Service check scheduled for Fri May 6 15:25:10 2005
[root at scp nagios]#
The nagios daemon is running:
[root at scp nagios]# service nagios status
NAGIOS ok - status written 10 seconds ago
[root at scp nagios]#
In /etc/nagios I have the following cfg files:
-rw-rw-r-- 1 root root 17144 Apr 10 11:12 cgi.cfg
-rw-rw-r-- 1 root root 4475 Apr 10 11:12 checkcommands.cfg
-rw-r--r-- 1 root root 15766 Mar 4 22:39 command-plugins.cfg
-rw-rw-r-- 1 root root 873 May 6 11:39 contactgroups.cfg
-rw-rw-r-- 1 root root 2009 May 6 11:04 contacts.cfg
-rw-rw-r-- 1 root root 1662 May 6 11:43 dependencies.cfg
-rw-rw-r-- 1 root root 1508 May 6 11:42 escalations.cfg
-rw-rw-r-- 1 root root 1907 May 6 11:30 hostgroups.cfg
-rw-rw-r-- 1 root root 5938 May 6 11:44 hosts.cfg
-rw-rw-r-- 1 root root 13583 Apr 10 11:12 minimal.cfg
-rw-rw-r-- 1 root root 4234 Apr 10 11:12 misccommands.cfg
-rw-rw-r-- 1 root root 21163 Apr 10 11:12 nagios.cfg
drwxr-xr-x 2 root nagios 4096 May 6 14:49 private
-rw-rw-r-- 1 root root 2421 May 6 13:37 services.cfg
-rw-r--r-- 1 root root 18387 May 6 11:36 services.cfg.orig
-rw-rw-r-- 1 root root 1589 Apr 10 11:12 timeperiods.cfg
I have three entries in my hosts.cfg. The template and 2 hosts:
# Generic host definition template
define host{
name generic-host ; The name of
this host template - referenced in other host definitions, used for
template recursion/resolution
notifications_enabled 1 ; Host notifications are
enabled
event_handler_enabled 1 ; Host event handler is
enabled
flap_detection_enabled 1 ; Flap detection is
enabled
process_perf_data 1 ; Process performance
data
retain_status_information 1 ; Retain status
information across program restarts
retain_nonstatus_information 1 ; Retain non-status
information across program restarts
register 0 ; DONT REGISTER THIS
DEFINITION - ITS NOT A REAL HOST, JUST A TEMPLATE!
}
# 'techops_lab' host definition
define host{
use generic-host ; Name of host
template to use
host_name techops_lab
alias Techops Lab in Orem
address 38.119.177.149
check_command check-host-alive
max_check_attempts 10
notification_interval 1
notification_period 24x7
notification_options d,u,r
}
# 'brentbrown' host definition
define host{
use generic-host ; Name of host
template to use
host_name brentbrown
alias Brent Brown
address 65.73.113.60
check_command check-host-alive
max_check_attempts 10
notification_interval 1
notification_period 24x7
notification_options d,u,r
}
I have one hostgroup in my hostgroup.cfg:
# 'netscreen' host group definition
define hostgroup{
hostgroup_name netscreens
alias Netscreens
contact_groups nsadmins
members techops_lab,brentbrown
}
I have created myself as a contact in contacts.cfg:
# 'Danny Russell' contact definition
define contact{
contact_name drussell
alias Danny Russell
service_notification_period 24x7
host_notification_period 24x7
service_notification_options w,u,c,r
host_notification_options d,u,r
service_notification_commands notify-by-email
host_notification_commands host-notify-by-email
email drussell at mpifix.com
}
I have 2 services in my services.cfg. (template config and a ping
check):
# Generic service definition template
define service{
name generic-service ; The 'name' of
this service template, referenced in other service definitions
active_checks_enabled 1 ; Active service checks
are enabled
passive_checks_enabled 1 ; Passive service checks
are enabled/accepted
parallelize_check 1 ; Active service checks
should be parallelized (disabling this can lead to major performance
problems)
obsess_over_service 1 ; We should obsess over
this service (if necessary)
check_freshness 0 ; Default is to NOT
check service 'freshness'
notifications_enabled 1 ; Service notifications
are enabled
event_handler_enabled 1 ; Service event handler
is enabled
flap_detection_enabled 1 ; Flap detection is
enabled
process_perf_data 1 ; Process performance
data
retain_status_information 1 ; Retain status
information across program restarts
retain_nonstatus_information 1 ; Retain non-status
information across program restarts
register 0 ; DONT REGISTER THIS
DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE!
}
# Netscren Ping Service definition
define service{
use generic-service ; Name
of service template to use
host_name *
service_description Netscreen Ping
is_volatile 0
check_period 24x7
max_check_attempts 3
normal_check_interval 3
retry_check_interval 1
contact_groups nsadmins
notification_interval 120
notification_period 24x7
notification_options w,u,c,r
check_command check_ping
}
Where have I gone wrong? Why wouldn't the pages show up?
--Thanks!
Danny Russell
Mobile Productivity, Inc.
drussell at mpifix.com
Enabling the World To Work
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