Nagios XI - Empty Screen for Wizard, Component, Dashlet

Problem Description

In some pages of XI you may come across empty screens, such as no configuration wizards appearing under the Configure menu.

Explanation

When plugins, components or wizards are not installed through the proper menus, this creates problems in Nagios XI, such as "wiping out" all wizards, so they can not be viewed in the Web interface, blank pages in the Web browser and other weird behaviors.

The proper way is:

Download the dashlet, component or wizard you need to install
Go to the Admin menu and then select the proper sub-menu from the left panel under the System Extensions:
- For Dashlets: Manage Dashlets > Browse (select your plugin installation file) > Open > Upload Dashlet
- For Components: Manage Components > Browse (select your component installation file) > Open > Upload Component
- For Wizards: Manage Config Wizards > Browse (select your wizard installation file) > Open > Upload Wizard

Note: Don't unzip the installation file prior to selecting it through "Browse".

Also, don't rename the installation files. This will cause the installation to fail. The name of the file should be: "somename".zip. If you had a previous copy of the file and you download it again, your new file will be named "somename"(1).zip, which will not work.

If you already made a mistake and erroneously installed a component in place of the wizard or vice versa, here is what you should do:

Remove the problematic component/wizard by running in terminal as a root:

rm -rf /usr/local/nagiosxi/html/includes/components/somedashlet
rm -rf /usr/local/nagiosxi/html/includes/components/somecomponent
rm -rf /usr/local/nagiosxi/html/includes/configwizards/somewizard

Try installing the component/wizard again.

If you have blank pages in the web browser, this usually means there is a PHP error. Run:

tail /var/log/httpd/error_log

right after loading that page to see what the errors are. If you are unsure how to resolve the problem please contact support.

Sometimes, when you try to install a plugin you may receive an error message:

The following error message is produced:

Plugin could not be installed - directory permissions may be incorrect

In order to check the permissions of your "libexec" directory, run in terminal:

ls -l /usr/local/nagios

The owner of "libexec" directory should be nagios:nagios and the permissions should be set to 775 (drwxrwxr-x). If this is not what you have, run in terminal:

chmod 775 /usr/local/nagios/libexec
chown nagios:nagios /usr/local/nagios/libexec

Then attempt to upload the plugin again

Final Thoughts

For any support related questions please visit the Nagios Support Forums at:

http://support.nagios.com/forum/