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159 lines
6.1 KiB
Python
159 lines
6.1 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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from cs.CsFile import CsFile
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LEASES = "/var/lib/misc/dnsmasq.leases"
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DHCP_HOSTS = "/etc/dhcphosts.txt"
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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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self.hosts = {}
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self.changed = []
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self.devinfo = CsHelper.get_device_info()
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self.preseed()
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self.cloud = CsFile(DHCP_HOSTS)
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self.conf = CsFile(CLOUD_CONF)
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length = len(self.conf)
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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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self.add(self.dbag[item])
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self.write_hosts()
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if self.cloud.is_changed():
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self.delete_leases()
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self.configure_server()
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self.conf.commit()
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self.cloud.commit()
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if self.cloud.is_changed():
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if length < 2:
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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 configure_server(self):
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# self.conf.addeq("dhcp-hostsfile=%s" % DHCP_HOSTS)
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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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sline = "dhcp-range=interface:%s,set:interface" % (device)
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line = "dhcp-range=interface:%s,set:interface-%s,%s,static" % (device, device, ip)
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self.conf.search(sline, line)
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gn = CsGuestNetwork(device, self.config)
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sline = "dhcp-option=tag:interface-%s,15" % device
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line = "dhcp-option=tag:interface-%s,15,%s" % (device, gn.get_domain())
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self.conf.search(sline, line)
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# DNS search order
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sline = "dhcp-option=tag:interface-%s,6" % device
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line = "dhcp-option=tag:interface-%s,6,%s" % (device, ','.join(gn.get_dns()))
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self.conf.search(sline, line)
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# Gateway
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gateway = ''
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if self.config.is_vpc():
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gateway = gn.get_gateway()
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else:
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gateway = i['gateway']
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sline = "dhcp-option=tag:interface-%s,3," % device
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line = "dhcp-option=tag:interface-%s,3,%s" % (device, gateway)
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self.conf.search(sline, line)
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# Netmask
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netmask = ''
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if self.config.is_vpc():
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netmask = gn.get_netmask()
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else:
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netmask = self.config.address().get_guest_netmask()
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sline = "dhcp-option=tag:interface-%s,1," % device
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line = "dhcp-option=tag:interface-%s,1,%s" % (device, netmask)
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self.conf.search(sline, line)
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def delete_leases(self):
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changed = []
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leases = []
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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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changed.append(to)
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for v in changed:
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if v['mac'] == to['mac'] or v['ip'] == to['ip'] or v['host'] == to['host']:
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to['del'] = True
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leases.append(to)
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for o in leases:
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if o['del']:
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cmd = "dhcp_release eth%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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except IOError:
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return
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def preseed(self):
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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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if self.config.is_vpc():
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self.add_host("127.0.0.1", CsHelper.get_hostname())
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if self.config.is_router():
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self.add_host(self.config.address().get_guest_ip(), "%s data-server" % CsHelper.get_hostname())
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def write_hosts(self):
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file = CsFile("/etc/hosts")
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for ip in self.hosts:
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file.search("^%s" % ip, "%s\t%s" % (ip, self.hosts[ip]))
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file.commit()
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if file.is_changed():
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logging.info("Updated hosts file")
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else:
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logging.debug("Hosts file unchanged")
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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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if self.cloud.search("%s," % entry['mac_address'],
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"%s,%s,%s,infinite" % (entry['mac_address'],
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entry['ipv4_adress'],
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entry['host_name'])):
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self.changed.append({'mac': entry['mac_address'],
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'ip4': entry['ipv4_adress'],
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'host': entry['host_name']})
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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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# Virtual Router
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v['gateway'] = entry['default_gateway']
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def add_host(self, ip, hosts):
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self.hosts[ip] = hosts
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