AP: Is there a way to delete a host from the list of hosts that the service runs on without deleting the entire service?

[snapier3]

Ah, I get you.
Without removing the association that provides the inheritance of the 1:XX service object I don't think you would be able to accomplish what you're after.

Wonder if throwing something like this on the service object would work, even if group membership says otherwise?

Hostgroup windows includes a box named angryserver.
Windows inherits CPU checks with warn at 75 and crit at 85, this box is angry and I don't want it on that server.

So in the post to the service in the API it would be something like this.

hostgroups=windows
hosts=!angryserver

It's kind of cumbersome and I haven't tested if this would prevent the config from being written for that object.

[eloyd]

What you've posted technically works because it creates a correct Nagios Core configuration file. However, it's....cumbersome.

[snapier3]

I just test the above scenario and it does work preventing the config from being written when done via the UI so in theory you could do same via the API, I think.
Hostgroup with two members

hg-linux.PNG

hg-memers.PNG

Check applied via hostgroup

hostgroup-apply.PNG

Localhost excluded

excludedhost.PNG

Only deployed to the one host

deployed-service.PNG

[snapier3]

What you've posted technically works because it creates a correct Nagios Core configuration file. However, it's....cumbersome.

Most Definitely True!

Have you tried getting a csv list of hostgroup members though?


--SN

[eloyd]

Yes. For us, that's quite easy, because we've written an API pre-processor script. So it would be:

Code: Select all

# napi --api --config -t hostgroupmembers -hg <hostgroup> -o h -o C
host1,host2,host3,host4

[danderson]

I think I get what you're saying, you want an API call that will basically add the host=!SOMEHOST line to the service config file and/or you want to preexisting delete command for a service to be able to handle that.

[snapier3]

Yes. For us, that's quite easy, because we've written an API pre-processor script. So it would be:

Code: Select all

# napi --api --config -t hostgroupmembers -hg <hostgroup> -o h -o C
host1,host2,host3,host4

Yeah, I just did it in Python
I have a function named nagiosxiGenericAPI that does the http interaction with the API and returns data.
Then I just take what I need from there

Code: Select all

        ##GET THE HOSTGROUPMEMBERS FOR THE TARGET GROUP
        modhg = "&hostgroup_name={}".format(meta.hostgroup)
        hostgm = nagiosxiGenericAPI("objects","hostgroupmembers",modhg,"get",auth["url"],auth["apikey"])
        hd = hostgm.json()
        ##BUILD THE LIST 
        memlst = list()
        hostlistcnt = 0
        members = hd["hostgroup"][0]["members"]['host']
        for i in members:
            memlst.append(i["host_name"])
            hostlistcnt += 1
        print(",".join(memlist))

[eloyd]

I think I get what you're saying, you want an API call that will basically add the host=!SOMEHOST line to the service config file and/or you want to preexisting delete command for a service to be able to handle that.

Yes!