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#!/usr/bin/python
# Copyright (C) 2009 Gluster, Inc. <http://www.gluster.com>
# This file is part of Gluster Storage Platform.
#
# Gluster Storage Platform 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.
#
# Gluster Storage Platform 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/>.
import os
import string
import time
import Utils
import socket
import struct
import Globals
from XmlHandler import *
def isInPeer():
command = "gluster peer status"
status = Utils.runCommand(command, output=True, root=True)
if status["Status"] == 0:
if status["Stdout"].strip().upper() != "NO PEERS PRESENT":
return True
return False
Utils.log("command [%s] failed with [%d:%s]" % (command, status["Status"], os.strerror(status["Status"])))
return False
def response(multiCastGroup, port):
# waiting for the request!
socketRequest = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
socketRequest.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
socketRequest.bind(('', port))
mreq = struct.pack("4sl", socket.inet_aton(multiCastGroup), socket.INADDR_ANY)
socketRequest.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
socketSend = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
socketSend.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 2)
#TODO: Remove infinite loop and make this as a deamon (service)
while True:
request = socketRequest.recvfrom(1024)
if not request:
continue
dom = XDOM()
dom.parseString(request[0])
if not dom:
continue
if not dom.getTextByTagRoute("request.name"):
continue
requesttime = dom.getTextByTagRoute("request.time")
if not requesttime:
continue
if isInPeer():
time.sleep(5)
continue
socketSend.sendto("<response><servername>%s</servername><time>%s</time></response>" % (socket.gethostname(), requesttime),
(multiCastGroup, port))
request = None
def main():
response(Globals.MULTICAST_GROUP, Globals.MULTICAST_PORT)
if __name__ == "__main__":
main()
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