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#!/usr/bin/python
# discovery.py Nagios plugin to discover Gluster entities using NRPE
# Copyright (C) 2014 Red Hat Inc
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
import datetime
from pynag import Model

from glusternagios import utils
import submit_external_command


serviceCmdPath = utils.CommandPath("service", "/sbin/service", )


def restartNagios():
    now = datetime.datetime.now()
    cmdStr = "[%s] RESTART_PROGRAM\n" % (now)
    submit_external_command.submitExternalCommand(cmdStr)


def isNagiosRunning():
    (rc, out, err) = utils.execCmd([serviceCmdPath.cmd, 'nagios', 'status'])
    if rc == 0:
        return True
    else:
        return False


def getServiceConfig(serviceDesc, hostName):
    serviceConfig = Model.Service.objects.filter(
        service_description=serviceDesc, host_name=hostName)
    if serviceConfig:
        return serviceConfig[0]
    else:
        return None


def getServiceConfigByHost(hostName):
    serviceConfigs = Model.Service.objects.filter(host_name=hostName)
    return serviceConfigs


def getHostConfigByName(hostName):
    hostConfigs = Model.Host.objects.filter(host_name=hostName)
    if hostConfigs:
        return hostConfigs[0]
    else:
        return None


def getHostConfigsForCluster(clusterName):
    hostgroup = getHostGroup(clusterName)
    if hostgroup:
        return hostgroup.get_effective_hosts()
    else:
        return []


def getHostGroup(name):
    hostgroup = Model.Hostgroup.objects.filter(hostgroup_name=name)
    if hostgroup:
        return hostgroup[0]
    else:
        return None