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7d0df32560
firewallrules implemented sperately from networkacl (ugly but best that can be done ATM) Some refactoring in CsDHCP as it made no sense to do it that way anymore processmonitoring implemented Domain not correctly sourced in VR
177 lines
6.3 KiB
Python
177 lines
6.3 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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import CsHelper
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import logging
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from netaddr import *
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from CsGuestNetwork import CsGuestNetwork
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from cs.CsDatabag import CsDataBag
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NO_PRELOAD = False
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LEASES = "/var/lib/misc/dnsmasq.leases"
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DHCP_HOSTS = "/etc/dhcphosts.txt"
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DHCP_OPTS = "/etc/dhcpopts.txt"
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DNSMASQ_CONF = "/etc/dnsmasq.conf"
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CLOUD_CONF = "/etc/dnsmasq.d/cloud.conf"
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class CsDhcp(CsDataBag):
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""" Manage dhcp entries """
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def process(self):
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dnsmasq = CsDnsMasq(self.config)
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for item in self.dbag:
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if item == "id":
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continue
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dnsmasq.add(self.dbag[item])
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dnsmasqb4 = CsDnsMasq(self.config, NO_PRELOAD)
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dnsmasqb4.parse_hosts()
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dnsmasqb4.parse_dnsmasq()
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if not dnsmasq.compare_hosts(dnsmasqb4):
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logging.info("Updating hosts file")
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dnsmasq.write_hosts()
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else:
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logging.debug("Hosts file is up to date")
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diff = dnsmasq.compare_dnsmasq(dnsmasqb4)
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if len(diff) > 0:
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dnsmasq.updated = True
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dnsmasq.delete_leases(diff)
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dnsmasq.write_dnsmasq()
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dnsmasq.first_host = dnsmasqb4.first_host
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dnsmasq.configure_server()
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class CsDnsMasq(object):
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def __init__(self, config, preload=True):
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self.list = []
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self.hosts = []
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self.leases = []
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self.config = config
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self.updated = False
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self.devinfo = CsHelper.get_device_info()
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self.devs = []
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self.first_host = False
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if preload:
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self.add_host("127.0.0.1", "localhost")
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self.add_host("::1", "localhost ip6-localhost ip6-loopback")
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self.add_host("ff02::1", "ip6-allnodes")
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self.add_host("ff02::2", "ip6-allrouters")
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self.add_host("127.0.0.1", CsHelper.get_hostname())
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def delete_leases(self, clist):
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try:
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for line in open(LEASES):
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bits = line.strip().split(' ')
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to = {"device": bits[0],
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"mac": bits[1],
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"ip": bits[2],
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"host": bits[3],
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"del": False
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}
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for l in clist:
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lbits = l.split(',')
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if lbits[0] == to['mac'] or \
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lbits[1] == to['ip']:
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to['del'] is True
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break
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self.leases.append(to)
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for o in self.leases:
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if o['del']:
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cmd = "dhcp_release %s %s %s" % (o.device, o.ip, o.mac)
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logging.info(cmd)
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CsHelper.execute(cmd)
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# Finally add the new lease
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except IOError:
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return
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def configure_server(self):
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self.updated = self.updated | CsHelper.addifmissing(DNSMASQ_CONF, "dhcp-hostsfile=/etc/dhcphosts.txt")
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# self.updated = self.updated | CsHelper.addifmissing(DNSMASQ_CONF, "dhcp-optsfile=%s:" % DHCP_OPTS)
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for i in self.devinfo:
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if not i['dnsmasq']:
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continue
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device = i['dev']
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ip = i['ip'].split('/')[0]
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line = "dhcp-range=interface:%s,set:interface-%s,%s,static" % (device, device, ip)
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self.updated = self.updated | CsHelper.addifmissing(CLOUD_CONF, line)
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# Next add the domain
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# if this is a guest network get it there otherwise use the value in resolv.conf
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gn = CsGuestNetwork(device, self.cl)
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line = "dhcp-option=tag:interface-%s,15,%s" % (device, gn.get_domain())
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self.updated = self.updated | CsHelper.addifmissing(CLOUD_CONF, line)
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if self.updated:
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if self.first_host:
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CsHelper.service("dnsmasq", "restart")
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else:
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CsHelper.hup_dnsmasq("dnsmasq", "dnsmasq")
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def parse_dnsmasq(self):
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self.first_host = False
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try:
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for line in open(DHCP_HOSTS):
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self.list.append(line.strip())
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if len(self.list) == 0:
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self.first_host = True
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except IOError:
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self.first_host = True
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def parse_hosts(self):
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for line in open("/etc/hosts"):
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line = line.rstrip().lstrip()
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if line == '':
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continue
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if line.startswith("#"):
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continue
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bits = ' '.join(line.split()).split(' ', 1)
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self.add_host(bits[0], bits[1])
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def compare_hosts(self, obj):
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return set(self.hosts) == set(obj.hosts)
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def compare_dnsmasq(self, obj):
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return list(set(self.list).symmetric_difference(set(obj.list)))
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def write_hosts(self):
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logging.debug("Updating hosts file")
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handle = open("/etc/hosts", 'w+')
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for line in self.hosts:
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handle.write("%s\n" % line)
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handle.close()
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def write_dnsmasq(self):
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logging.debug("Updating %s", DHCP_HOSTS)
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handle = open(DHCP_HOSTS, 'w+')
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for line in self.list:
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handle.write("%s\n" % line)
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b = line.split(',')
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handle.close()
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def add(self, entry):
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self.add_host(entry['ipv4_adress'], entry['host_name'])
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self.add_dnsmasq(entry['ipv4_adress'], entry['host_name'], entry['mac_address'])
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i = IPAddress(entry['ipv4_adress'])
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# Calculate the device
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for v in self.devinfo:
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if i > v['network'].network and i < v['network'].broadcast:
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v['dnsmasq'] = True
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def add_dnsmasq(self, ip, host, mac):
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self.list.append("%s,%s,%s,infinite" % (mac, ip, host))
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def add_host(self, ip, host):
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self.hosts.append("%s\t%s" % (ip, host))
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