#!/bin/bash
#
# Ceilometer API monitoring script for Sensu
#
# Copyright © 2013 eNovance <licensing@enovance.com>
#
# Author: Emilien Macchi <emilien.macchi@enovance.com>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#

# #RED
set -e

STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
STATE_DEPENDENT=4

usage ()
{
    echo "Usage: $0 [OPTIONS]"
    echo " -h               Get help"
    echo " -H <Auth URL>    URL for obtaining an auth token"
    echo " -U <username>    Username to use to get an auth token"
    echo " -T <tenant>      Tenant to use to get an auth token"
    echo " -P <password>    Password to use ro get an auth token"
    echo " -E <Endpoint>    URL for Ceilometer endpoint. Optional. If blank, use service catalog"
}

while getopts 'h:H:U:T:P:E:' OPTION
do
    case $OPTION in
        h)
            usage
            exit 0
            ;;
        H)
            export OS_AUTH_URL=$OPTARG
            ;;
        U)
            export OS_USERNAME=$OPTARG
            ;;
        T)
            export OS_TENANT_NAME=$OPTARG
            ;;
        P)
            export OS_PASSWORD=$OPTARG
            ;;
        E)
            export CEILOMETER_URL=$OPTARG
            ;;
        *)
            usage
            exit 1
            ;;
    esac
done


if ! which ceilometer >/dev/null 2>&1
then
    echo "python-ceilometerclient is not installed."
    exit $STATE_UNKNOWN
fi


if ! KEY=$(ceilometer meter-list 2>/dev/null)
then
    echo "Unable to list meters"
    exit $STATE_CRITICAL
fi

count=$(($(ceilometer meter-list 2>/dev/null | wc -l)-4))

echo "Ceilometer API is working with $count meters."