Remove member from hostgroups?

[Ruslan Valiyev]

Hi all,

I'm trying to implement a function to remove a host from hosts.cfg and hostgroups.cfg (and possible services.cfg)

Currently, I only managed to delete hosts from hosts.cfg

for i in Model.Host.objects.filter(host_name='host.foo.com'):

    i.delete()

I can't figure out how to do the same and remove 'host.foo.com' from all hostgroups where the host is present.

rv

[Ruslan Valiyev]

Turned out I was using a pretty outdated version.

Apparently, removing hosts is easier than I realized.

>>> from pynag.Parsers import config

>>> nc = config('/usr/local/nagios/etc/nagios.cfg')

>>> nc.parse()

>>> nc.delete_host('host.foo.com')

True

>>> nc.commit()

And thanks to this script, I think I get the idea of how to remove the host from the groups now. It's about manipulating the following list: c.get_hostgroup('mygroup')['members'].split(',')

[Ruslan Valiyev]

And it's done

#!/usr/bin/env python

import sys

from pynag.Parsers import config

hostname = sys.argv[1]

class NagiosTools:

    def __init__(self):

        self.nc = config('/usr/local/nagios/etc/nagios.cfg')

        self.nc.parse()

    def removeHost(self, hostname):

        host_obj = self.nc.get_host(hostname)

        if not host_obj:

            sys.stderr.write('Host %s not found\n' % hostname)

            sys.exit(2)

        # Remove from hosts.cfg

        print 'Removing %s...' % hostname

        self.nc.delete_host(hostname)

        # Remove from hostgroups.cfg

        for i in self.nc['all_hostgroup']:

            if hostname in i['members']:

                match_group = self.nc.get_hostgroup(i['hostgroup_name'])

                print 'Removing %s from %s' % (hostname, i['hostgroup_name'])

                new_group = match_group['members'].split(',')

                new_group.remove(hostname)

                new_group.sort()

                self.nc['all_hostgroup'].remove(match_group)

                match_group['members'] = ','.join(new_group)

                match_group['meta']['needs_commit'] = True

                self.nc['all_hostgroup'].append(match_group)

                self.nc.commit()

c = NagiosTools()

c.removeHost(hostname)

[Páll Sigurðsson]

Even better, in recent version of pynag your original code works and it cleans up references like removing from hostgroup :)

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[Ruslan Valiyev]

Wow, I did not see that coming! Great stuff, thanks!

rv