Nagios Support Forum

Hi,

I was trying to disable an host from the CCM, but it was not allowing me for it had some "dependencies".
I tried to delete it. the system allowed me, but when I tried to apply the configuration it threw some errors and had to revert to the latest snapshot.

Luckily I did remember that I did add the host in a service in order to "exclude" it. once I removed the "eclusion" dependency from the service I was then able to disable and in a second time delete the host without errors.

is that a normal behavior? if so, how can I find all the relationships that a host has that might prevent me from disabling/deleting it?

I'm running Nagios XI 5.6.13

best regards,
Luca

It is normal for a host to have dependencies. It is recommended to remove all services associated with a host during removal. Are you asking if an exclusion should count as a dependency?

I can recommend several resources ( see below ) on how dependencies work in Nagios and how to remove them.

core doc = https://assets.nagios.com/downloads/nag ... ncies.html
video = https://youtu.be/WFiRAxN6eDY

I am familiar with these different dependencies and that's why we mostly use HostGroups to assign services. We organized all different services into hostgroups to easily assign the same services to multiple host at once.
One example of hostgroup could be "Windows Server OS" that automatically associates the host with the following services:
- CPU usage
- Memory usage
- Drive C usage
- Uptime
- Windows update

sometimes we need to exclude the "Windows Update" check. since it is very rare, we just add the host inside the service "Windows Update" as exclusion, in this way we don't need to move the service to a different hostgroup and risk to forget to assign it to an important host.
this is the case that was preventing me from deleting the host.
how can I easily find if an host is present in any other service like in this case? the error message when deleting can give me a clue, otherwise do I have to go thru all hostgroups and look for the host?

This won't help if it's already deleted but if you go to Admin > Core Config Manager > Hosts and click the little blue circle with an "i" in it to the far right of the host, it will show you the relationships.

After talking with development on this I've submitted a bug report:

This only failed for me with escalations, not dependencies, but I submitted it anyways.

thanks! that did help.

lucasari wrote:thanks! that did help.

Bug report files, locking thread