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FAQ Database : Nagios (111)
This category covers issues that relate to the Nagios daemon and web interface.

FAQs In This Category:
Can Nagios take advantage of multiple processors?
Running multiple instances of Nagios on the same machine

Sub-Sections:
Compiling (7)

FAQs In This Category:
GD library causing compilation problems
GD, PNG, and/or JPEG libraries could not be located on OpenBSD 3.4
GD, PNG, and/or JPEG libraries could not be located on OpenBSD 3.9
GD, PNG, and/or JPEG libraries could not be located on RedHat 9
GD, PNG, and/or JPEG libraries could not be located on Solaris 10
Solaris 10 install
Trouble compiling Nagios due to missing snprintf(), strncat(), or strncpy() functions

Configuration (12)

FAQs In This Category:
Can I add host or service definitions without restarting Nagios?
Can I configure Nagios through a web interface?
Can I monitor a host without defining any services for it?
Can I specify multiple addresses for a host?
Error: Could not read object configuration data!
Host dependencies versus parent/child relationships
How can I have Nagios process all object configuration files in a particular directory?
How can I have Nagios process multiple object configuration files?
How can I have the CGIs process multiple extended information configuration files?
How do I convert my NetSaint config files to work with Nagios?
How do I convert Nagios 1.x configuration files to the Nagios 2.x format?
Status Map user defined coordinates with mysql

Developer Information (4)

FAQs In This Category:
How can I convert the timestamp values in the log file to a friendlier format?
How do I submit a patch for the Nagios daemon, CGIs, and/or documentation?
Status log data format and field description
What timestamp format is used in data and log files?

Distributed Monitoring (0)

Error and Warning Messages (12)

FAQs In This Category:
Checking the status of Nagios with MySQL or PostgreSQL DB support
CHECK_SNMP Special Charaters in Community
Debugging "unknown variable" errors during runtime or configuration verification
Error messages are generated in the console when email notifications should be sent out
Error: Could not connect to MySQL database
Error: Could not read object configuration data!
Monitoring process may not be running
Multiple logs are present in the archive directory for a single archive period
Nagios shuts down with errors about not being able to open the external command file for reading
Nagios-www errors on Mandriva with msec
No Status Information / status.log is empty
Return code of X is out of bounds error message

Event Handlers (0)

Failure Prediction (1)

FAQs In This Category:
How can I use the failure prediction feature in Nagios?

Flap Detection (0)

Installing (3)

FAQs In This Category:
Nagios Makefile permissions for init script on FreeBSD
The etc/ subdirectory is missing from my Nagios installation. Whats the deal?
The libexec/ subdirectory is missing from my Nagios installation. Where are all the plugins?

Integration With Other Software (3)

FAQs In This Category:
How do I log host and service events to an external database?
Receiving SNMP traps
Sending SNMP traps to a management host

Monitoring Specific Devices, Operating Systems and Services (2)

FAQs In This Category:
How do I monitor device/OS/service X?
nagios tomcat monitor howto

Notifications (16)

FAQs In This Category:
Email notifications generate error messages or do not get sent out
Host notifications dont get sent out often enough
How can I have notifications sent to an alphanumeric pager?
How can I have notifications sent using AIM (AOL Instant Messenger)?
How can I have notifications sent via Yahoo Messenger?
How can I have only one notification sent out per host or service event?
How can I send notifications via Jabber?
How can I send notifications via SMS?
How can I send WinPopup notifications?
How do I avoid having to configure Sendmail?
How do I change the address the mail is sent from for email notifications?
How to send sms-notifications with sms-client
Notifications about hosts being DOWN or UNREACHABLE when they are UP
Q: How i can use gnokii with nagios
Why do I get notifications when hosts are UNREACHABLE?
Why do I get service notifications when I should be getting host notifications?

Performance Data (0)

Redundant / Failover Monitoring (0)

Scheduled Downtime (1)

FAQs In This Category:
Is there a way to schedule recurring downtime for hosts or services?

Service and Host Checks (5)

FAQs In This Category:
Cant pass bang (!) as string to plugin (i.e. check_http)
Cant pass dollar ($) symbol as string to plugin (i.e. check_nt)
Does Nagios support passive host checks?
How do I change the timeout values for service checks?
Post data not being received correctly

Troubleshooting (6)

FAQs In This Category:
"Service Check Timed Out" errors with Solaris
Incorrect Ping Warnings
Multiple Nagios processes
Nagios is hogging memory or causing the server to swap heavily
Problems installing the Nagios CGIs with Apache 2.0's suexec module
status.log not created on startup, no reason stated.

Web Interface (37)

FAQs In This Category:
"Page cannot be displayed" web server error
; & < > get removed in posted comments
Attempting to access the CGIs produces messages about improper authorization
Attempting to submit commands to the Nagios process via the command CGI generates errors
Cannot get statusmap, etc. to work under solaris (9 but maybe lower)
CGIs Producing "Internal Server Errors"
GD2 images do not display in status map
GD2 images do not display in status map (part 2)
Hosts and services intermittently disappear from the web interface
Hosts are incorrectly listed as being DOWN or UNREACHABLE
How do I access the WAP interface with my Internet-enabled cellphone?
How do I beautify the CGIs with host and service icons?
How do I change the location of the Nagios process icon in the statusmap CGI?
How do I change the location or layout of hosts in the statusmap CGI?
How do I change the location or layout of hosts in the statuswrl (VRML) CGI?
How do I convert an image to GD2 format for use in the statusmap CGI?
How do I hide the Nagios process icon in the statusmap and 3-d statusmap (VRML) CGIs?
How do I require users to authenticate before accessing the web interface?
Is it possible to logout of the web interface and login as another user?
Malformed header errors when accessing the CGIs
Monitoring process may not be running
No permission to view configuration
Setting SetEnv Directive in Apache to make work CGIs
The statusmap, trends and histogram CGIs are missing or dont work!
The statusmap, trends and histogram CGIs exist but produce an error when accessed
The statusmap, trends and histogram CGIs exist but produce an error when accessed -- Part 2
Troubleshooting undetermined times in trends and availability CGIs
Web-Monitoring outputs garbage
What does "(Host assumed to be up) " mean in the host status information?
What does "(Not enough data to determine host status yet) " mean in the host status information?
What does the backtracked archives option in the trends and availability CGIs do/mean?
When I click on the "3-D Status Map" link I dont see anything or I get a broken image
When I click the "3-D Status Map" link my browser tries to download and save the statuswrl.cgi file
Where can I find a VRML client for my web browser so I can view the 3-D status map?
Where can I find host and service icons to beautify the CGIs?
Where can I find the daemonchk CGI?
Where can I find the traceroute CGI?