1 # -*- python-indent: 4 -*-
4 Description: IPv6 Support and Management to Slices
5 ipv6 nodemanager plugin
7 Author: Guilherme Sperb Machado <gsm@machados.org>
18 from sliver_libvirt import Sliver_Libvirt
19 from xml.dom.minidom import parseString
23 radvd_conf_file = '/etc/radvd.conf'
24 sliversipv6prefixtag = 'sliversipv6prefix'
27 logger.log("ipv6: plugin starting up...")
29 def build_libvirt_default_net_config(dom):
31 # create the <network> element
32 networkElem = dom.createElement("network")
33 # create <name> element
34 nameElem = dom.createElement("name")
35 textName = dom.createTextNode("default")
36 nameElem.appendChild(textName)
37 # create <uuid> element
38 uuidElem = dom.createElement("uuid")
39 textUUID = dom.createTextNode(str(uuid.uuid1()))
40 uuidElem.appendChild(textUUID)
41 # create <forward> element
42 forwardElem = dom.createElement("forward")
43 forwardElem.setAttribute("mode", "nat")
44 # create <nat> element
45 natElem = dom.createElement("nat")
46 # create <port> element
47 portElem = dom.createElement("port")
48 portElem.setAttribute("end", "65535")
49 portElem.setAttribute("start", "1024")
50 # create the ipv4 <ip> element
51 ipElem0 = dom.createElement("ip")
52 ipElem0.setAttribute("address", "192.168.122.1")
53 ipElem0.setAttribute("netmask", "255.255.255.0")
54 # create the <dhcp> element
55 dhcpElem = dom.createElement("dhcp")
56 # create the <range> element
57 rangeElem = dom.createElement("range")
58 rangeElem.setAttribute("end", "192.168.122.254")
59 rangeElem.setAttribute("start", "192.168.122.2")
60 # create the <bridge> element
61 bridgeElem = dom.createElement("bridge")
62 bridgeElem.setAttribute("delay", "0")
63 bridgeElem.setAttribute("name", "virbr0")
64 bridgeElem.setAttribute("stp", "on")
66 # build the whole thing
67 natElem.appendChild(portElem)
68 forwardElem.appendChild(natElem)
70 dhcpElem.appendChild(rangeElem)
71 ipElem0.appendChild(dhcpElem)
72 networkElem.appendChild(nameElem)
73 networkElem.appendChild(uuidElem)
74 networkElem.appendChild(forwardElem)
75 networkElem.appendChild(bridgeElem)
76 networkElem.appendChild(ipElem0)
79 def check_for_ipv6(defaultNetworkConfig):
80 netnodes = defaultNetworkConfig.getElementsByTagName('network')
82 for netnode in netnodes:
83 ips = netnode.getElementsByTagName('ip')
85 if ip.getAttribute('family')=='ipv6':
86 logger.log("ipv6: IPv6 address/prefix already set for slivers! %s/%s" % \
87 (ip.getAttribute('address'), ip.getAttribute('prefix')) )
92 def add_ipv6(defaultNetworkConfig, ipv6addr, prefix):
94 netnodes = defaultNetworkConfig.getElementsByTagName('network')
95 for netnode in netnodes:
96 # create the ipv6 <ip> element 1
97 ipElem1 = defaultNetworkConfig.createElement("ip")
98 ipElem1.setAttribute("family", "ipv6")
99 ipElem1.setAttribute("address", ipv6addr)
100 ipElem1.setAttribute("prefix", prefix)
101 # create the ipv6 <ip> element 2
102 # it's ugly, I know, but we need a link-local address on the interface!
103 ipElem2 = defaultNetworkConfig.createElement("ip")
104 ipElem2.setAttribute("family", "ipv6")
105 ipElem2.setAttribute("address", "fe80:1234::1")
106 ipElem2.setAttribute("prefix", "64")
107 # adding to the 'defaultNetworkConfig'
108 netnode.appendChild(ipElem1)
109 netnode.appendChild(ipElem2)
110 return defaultNetworkConfig
112 def change_ipv6(dom, ipv6addr, prefix):
113 ips = dom.getElementsByTagName('ip')
115 if ip.getAttribute("family")=='ipv6' and not(re.match(r'fe80(.*)', ip.getAttribute("address"), re.I)):
116 ip.setAttribute("address", ipv6addr)
117 ip.setAttribute("prefix", prefix)
121 def remove_ipv6(dom):
122 networks = dom.getElementsByTagName('network')
123 for network in networks:
124 ips = network.getElementsByTagName('ip')
126 if ip.getAttribute("family")=='ipv6':
127 network.removeChild(ip)
131 def check_if_ipv6_is_different(dom, ipv6addr, prefix):
132 netnodes = dom.getElementsByTagName('network')
133 for netnode in netnodes:
134 ips = netnode.getElementsByTagName('ip')
136 if ip.getAttribute('family')=='ipv6' and \
137 not ( re.match(r'fe80(.*)', ip.getAttribute("address"), re.I) ) and \
138 (ip.getAttribute('address')!=ipv6addr or ip.getAttribute('prefix')!=prefix) :
139 logger.log("ipv6: the IPv6 address or prefix are different. Change detected!")
144 def set_autostart(network):
146 network.setAutostart(1)
148 logger.log("ipv6: network could not set to autostart")
151 def set_up(networkLibvirt, connLibvirt, networkElem, ipv6addr, prefix):
152 newXml = networkElem.toxml()
153 #logger.log(networkElem.toxml())
156 # logger.log(repr(method))
157 networkLibvirt.undefine()
158 networkLibvirt.destroy()
159 connLibvirt.networkCreateXML(newXml)
160 networkDefault = connLibvirt.networkDefineXML(newXml)
161 set_autostart(networkDefault)
162 commandForwarding = ['sysctl', '-w', 'net.ipv6.conf.all.forwarding=1']
163 logger.log_call(commandForwarding, timeout=15*60)
168 MinRtrAdvInterval 30;
169 MaxRtrAdvInterval 100;
170 prefix %(ipv6addr)s/%(prefix)s
179 with open(radvd_conf_file,'w') as f:
183 logger.log("ipv6: set up process finalized. Enabled IPv6 address to the slivers!")
185 def clean_up(networkLibvirt, connLibvirt, networkElem):
186 dom = remove_ipv6(networkElem)
188 networkLibvirt.undefine()
189 networkLibvirt.destroy()
190 # TODO: set autostart for the network
191 connLibvirt.networkCreateXML(newXml)
192 networkDefault = connLibvirt.networkDefineXML(newXml)
193 set_autostart(networkDefault)
195 logger.log("ipv6: cleanup process finalized. The IPv6 support on the slivers was removed.")
198 command_kill_radvd = ['killall', 'radvd']
199 logger.log_call(command_kill_radvd, timeout=15*60)
202 commandRadvd = ['radvd']
203 logger.log_call(commandRadvd, timeout=15*60)
205 def GetSlivers(data, config, plc):
209 interfaces = data['interfaces']
210 logger.log(repr(interfaces))
211 for interface in interfaces:
212 logger.log('ipv6: get interface: %r'%(interface))
213 if 'interface_tag_ids' in interface:
214 interface_tag_ids = "interface_tag_ids"
215 interface_tag_id = "interface_tag_id"
216 settings = plc.GetInterfaceTags({interface_tag_id:interface[interface_tag_ids]})
217 is_slivers_ipv6_prefix_set = False
218 for setting in settings:
219 if setting['tagname']==sliversipv6prefixtag:
220 ipv6addrprefix = setting['value'].split('/', 1)
221 ipv6addr = ipv6addrprefix[0]
223 if len(ipv6addrprefix)>1:
224 prefix = ipv6addrprefix[1]
225 if prefix>0 and prefix<=64:
231 logger.log("ipv6: '%s'=%s" % (sliversipv6prefixtag,ipv6addr) )
232 valid_ipv6 = tools.is_valid_ipv6(ipv6addr)
234 logger.log("ipv6: the 'sliversipv6prefix' tag presented a non-valid IPv6 address!")
235 elif not(valid_prefix):
236 logger.log("ipv6: the '%s' tag does not present a valid prefix " +
237 "(e.g., '/64', '/58')!" % (sliversipv6prefixtag) )
239 # connecting to the libvirtd
240 connLibvirt = Sliver_Libvirt.getConnection(type)
241 list = connLibvirt.listAllNetworks()
242 for networkLibvirt in list:
243 xmldesc = networkLibvirt.XMLDesc()
244 dom = parseString(xmldesc)
245 has_ipv6 = check_for_ipv6(dom)
247 # let's first check if the IPv6 is different or is it the same...
248 is_different = check_if_ipv6_is_different(dom, ipv6addr, prefix)
250 logger.log("ipv6: tag 'sliversipv6prefix' was modified! " +
251 "Updating configuration with the new one...")
252 network_elem = change_ipv6(dom, ipv6addr, prefix)
253 set_up(networkLibvirt, connLibvirt, network_elem, ipv6addr, prefix)
254 logger.log("ipv6: trying to reboot the slivers...")
255 tools.reboot_slivers()
257 logger.log("ipv6: starting to redefine the virtual network...")
258 #network_elem = buildLibvirtDefaultNetConfig(dom,ipv6addr,prefix)
259 network_elem = add_ipv6(dom, ipv6addr, prefix)
260 set_up(networkLibvirt, connLibvirt, network_elem, ipv6addr, prefix)
261 logger.log("ipv6: trying to reboot the slivers...")
262 tools.reboot_slivers()
263 is_slivers_ipv6_prefix_set = True
264 if not(is_slivers_ipv6_prefix_set):
265 # connecting to the libvirtd
266 connLibvirt = Sliver_Libvirt.getConnection(type)
267 list = connLibvirt.listAllNetworks()
268 for networkLibvirt in list:
269 xmldesc = networkLibvirt.XMLDesc()
270 dom = parseString(xmldesc)
271 if check_for_ipv6(dom):
272 clean_up(networkLibvirt, connLibvirt, dom)
273 logger.log("ipv6: trying to reboot the slivers...")
274 tools.reboot_slivers()
276 logger.log("ipv6: all done!")