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#!/usr/bin/env python

class Ipvs:
    types = ''
    vip = '0.0.0.0'
    vport = '0'
    scheduler = ''
    nodes = []
    """
    def __init__(self, vs):
        self.types = vs[0]
        self.vip = vs[1]
        self.vport = vs[2]
        self.scheduler = vs[3]
        self.nodes = vs[4]
    """                                                                                    
class Node:
    nip     = '0.0.0.0'
    nport   = ''
    forward = ''
    weight = 0
    active = 0
    inact  = 0
    def __init__(self, node):
        nip = node[0]
        nport = node[1]
        forward = node[2]
        weight = node[3]
        active = node[4]
        incat = node[5]
        self.nip     = nip
        self.nport   = nport
        self.forward = forward
        self.weight = weight
        self.active = active
        self.inact  = incat

class Monitor:
    buffer = []
    ipvsdict = {}
    def __init__(self):
        self.buffer.append('')
        self.buffer.append('')
        #self.make()
 pass
    def clear(self):
        self.buffer = []
        self.ipvss = []
    def make(self):
        self.buffer.append('')
        for key in self.ipvsdict:
            ipvs = self.ipvsdict[key]
            self.node(ipvs.nodes,ipvs.vip+':'+ipvs.vport+' '+ipvs.scheduler)
        self.buffer.append('')
    def header(self,vs):
        self.buffer.append('')
    def node(self, nodes, caption):
        self.buffer.append('')
        self.buffer.append('')
 for node in nodes:
            self.buffer.append('')
            self.buffer.append(''+node.nip+'')
            self.buffer.append(''+node.nport+'')
            self.buffer.append(''+node.forward+'')
            self.buffer.append(''+node.weight+'')
            self.buffer.append(''+node.active+'')
            self.buffer.append(''+node.inact+'')
            self.buffer.append('')
        self.buffer.append('
'+caption+'
')
    def display(self):
        for buf in self.buffer:
            print buf
    def saveAs(self,filename):
#       if filename:
        f = open(filename,'w')
        for buf in self.buffer:
            f.write(buf)
        f.close()
    def save(self):
        self.saveAs('vs.xml')

    def ipvslist(self):
        w,r = os.popen2(IPVSADM)
        w.close()
        version = r.readline()
        vsfield = r.readline()
        nodefield = r.readline()

        pattern_vs = r'(\w+)\s+([0-9.]+):(\w+)\s+(\w+)'
        pattern_node = r'\s->\s([0-9.]+):(\w+)\s+(\w+)\s+(\d+)\s+(\d+)\s+(\d+)'
        cp_vs = re.compile(pattern_vs)
        cp_node = re.compile(pattern_node)

        current_vs = '' 
        for line in r.readlines():
            if line[:3] == 'TCP' or line[:3] == 'UDP':
                current_vs = line

                result = cp_vs.search(line).groups()
                ipvs = Ipvs()
                ipvs.types = result[0]
                ipvs.vip = result[1]
                ipvs.vport = result[2]
                ipvs.scheduler = result[3]
                ipvs.nodes = []
                self.ipvsdict[current_vs] = ipvs 
            elif line[2:4]== '->':
                result = cp_node.search(line).groups()
                oneNode = Node(result)
                #nodes.append(oneNode)
                self.ipvsdict[current_vs].nodes.append(oneNode)

class Network:
    interface = []
    def __init__(self):
        pass
    def hostname:
        pass

class Ipvsadmin:
    cmdline = ''
    vscache = []
    forward = {'nat':'','route':'','tunel':''}
    
    def load(self, config):
        pass
    def vip(self, vip, vport, scheduler):
        pass
    def rip(self, vip,rip,rport,forward,weight):
        pass
    def list(self):
        pass
    def saveAs(self):
        pass
    def restore(self):
        pass
    
class Deploy:
    src = ['vs.xml','vs.xsl']
    dst = ''
    def __init__(self):
        pass
    def target(self, dst):
        self.dst = dst
    def start(self):
        try:
            for srcfile in self.src:
                shutil.copy(srcfile,self.dst)
        except (IOError, os.error), why:
            print "Can't copy %s to %s: %s" % (`self.src`, `self.dst`, str(why))
            


import os,re
import shutil
IPVSADM='/sbin/ipvsadm'

def main():
    xml = Monitor()
    xml.ipvslist()
    xml.make()
    #xml.display()
    xml.save()
    #xml.saveAs('/var/www/vs.xml')
    deploy = Deploy()
    deploy.target('/var/www')
    deploy.start()

if __name__ == "__main__":
    main()


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