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#!/usr/bin/perl
# ipvs.monitor - Linux Virtual Server monitor for mon
# Check whether the specified virtual service is defined, and,
# optionally, whether it has any realservers defined.
#
# Invocation:
# ipvs.monitor [options] -V <virtual_server:port> -P <protocol>
#
# Options:
# -V virtual server
# -P protocol (tcp|udp)
# -z allows a virtual service to have zero realservers defined
#
# Notes:
# - Since it uses ipvsadm, this script (and therefore mon) must
# unfortunately run as root :(
# - ipvs.monitor returns 0 on success and 1 on failure
use Getopt::Std;
getopts ("zV:P:");
%proto = (
"tcp" => "-t",
"udp" => "-u",
);
$virtual_service = "$opt_V";
@ipvs = `/sbin/ipvsadm -l $proto{$opt_P} $virtual_service 2>&1`;
# allow a service with no realservers?
defined $opt_z ?
($n = 2)
:
($n = 3);
# Check the output:
# ...two lines of headers
# ...one line of virtual service
# ...one line for each realserver
$#ipvs < $n ?
exit 1
:
exit 0;
# # ## ### ##### ######## ############# #####################
# CHANGELOG
# Tue Jul 27 11:17:39 MYT 2004
# Initial version
# Christopher DeMarco <cdemarco@md.com.my>
# Tue Jul 27 14:14:08 MYT 2004
# added -z switch
# Christopher DeMarco <cdemarco@md.com.my>
# Wed Oct 1 18:34:27 CEST 2008
# fixed inline documentation
# fixed whitespace/tab
# Richard Hartmann <richih@net.in.tun.de>
# # ## ### ##### ######## ############# #####################
# Copyright (C) 2004, Christopher DeMarco
# Copyright (C) 2008, Richard Hartmann
#
# 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., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307 USA
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