1 # -*- python-indent: 4 -*-
4 Description: IPv6 Support and Management to Slices
5 ipv6 nodemanager plugin
7 Author: Guilherme Sperb Machado <gsm@machados.org>
10 * The 'sliversipv6prefix' tag must have this format:
11 ipv6_address/prefix -- e.g., 2002:1000::1/64
12 * The prefix specified on 'sliversipv6prefix' tag must be at least 64
13 It should vary between 1 and 64, since it is the minimum amount of bits to
14 have native IPv6 auto-configuration.
15 * The ipv6_address on 'sliversipv6prefix' tag can be any valid IPv6 address.
16 E.g., 2002:1000:: or 2002:1000::1
17 * It is the node manager/admin responsibility to properly set the IPv6 routing,
18 since slivers should receive/send any kind of traffic.
29 from sliver_libvirt import Sliver_Libvirt
30 from xml.dom.minidom import parseString
34 radvd_conf_file = '/etc/radvd.conf'
35 sliversipv6prefixtag = 'sliversipv6prefix'
38 logger.log("ipv6: plugin starting up...")
40 def build_libvirt_default_net_config(dom):
42 # create the <network> element
43 networkElem = dom.createElement("network")
44 # create <name> element
45 nameElem = dom.createElement("name")
46 textName = dom.createTextNode("default")
47 nameElem.appendChild(textName)
48 # create <uuid> element
49 uuidElem = dom.createElement("uuid")
50 textUUID = dom.createTextNode(str(uuid.uuid1()))
51 uuidElem.appendChild(textUUID)
52 # create <forward> element
53 forwardElem = dom.createElement("forward")
54 forwardElem.setAttribute("mode", "nat")
55 # create <nat> element
56 natElem = dom.createElement("nat")
57 # create <port> element
58 portElem = dom.createElement("port")
59 portElem.setAttribute("end", "65535")
60 portElem.setAttribute("start", "1024")
61 # create the ipv4 <ip> element
62 ipElem0 = dom.createElement("ip")
63 ipElem0.setAttribute("address", "192.168.122.1")
64 ipElem0.setAttribute("netmask", "255.255.255.0")
65 # create the <dhcp> element
66 dhcpElem = dom.createElement("dhcp")
67 # create the <range> element
68 rangeElem = dom.createElement("range")
69 rangeElem.setAttribute("end", "192.168.122.254")
70 rangeElem.setAttribute("start", "192.168.122.2")
71 # create the <bridge> element
72 bridgeElem = dom.createElement("bridge")
73 bridgeElem.setAttribute("delay", "0")
74 bridgeElem.setAttribute("name", "virbr0")
75 bridgeElem.setAttribute("stp", "on")
77 # build the whole thing
78 natElem.appendChild(portElem)
79 forwardElem.appendChild(natElem)
81 dhcpElem.appendChild(rangeElem)
82 ipElem0.appendChild(dhcpElem)
83 networkElem.appendChild(nameElem)
84 networkElem.appendChild(uuidElem)
85 networkElem.appendChild(forwardElem)
86 networkElem.appendChild(bridgeElem)
87 networkElem.appendChild(ipElem0)
90 def check_for_ipv6(defaultNetworkConfig):
91 netnodes = defaultNetworkConfig.getElementsByTagName('network')
93 for netnode in netnodes:
94 ips = netnode.getElementsByTagName('ip')
96 if ip.getAttribute('family')=='ipv6':
97 logger.log("ipv6: IPv6 address/prefix already set for slivers! %s/%s" % \
98 (ip.getAttribute('address'), ip.getAttribute('prefix')) )
103 def add_ipv6(defaultNetworkConfig, ipv6addr, prefix):
105 netnodes = defaultNetworkConfig.getElementsByTagName('network')
106 for netnode in netnodes:
107 # create the ipv6 <ip> element 1
108 ipElem1 = defaultNetworkConfig.createElement("ip")
109 ipElem1.setAttribute("family", "ipv6")
110 ipElem1.setAttribute("address", ipv6addr)
111 ipElem1.setAttribute("prefix", prefix)
112 # create the ipv6 <ip> element 2
113 # it's ugly, I know, but we need a link-local address on the interface!
114 ipElem2 = defaultNetworkConfig.createElement("ip")
115 ipElem2.setAttribute("family", "ipv6")
116 ipElem2.setAttribute("address", "fe80:1234::1")
117 ipElem2.setAttribute("prefix", "64")
118 # adding to the 'defaultNetworkConfig'
119 netnode.appendChild(ipElem1)
120 netnode.appendChild(ipElem2)
121 return defaultNetworkConfig
123 def change_ipv6(dom, ipv6addr, prefix):
124 ips = dom.getElementsByTagName('ip')
126 if ip.getAttribute("family")=='ipv6' and not(re.match(r'fe80(.*)', ip.getAttribute("address"), re.I)):
127 ip.setAttribute("address", ipv6addr)
128 ip.setAttribute("prefix", prefix)
132 def remove_ipv6(dom):
133 networks = dom.getElementsByTagName('network')
134 for network in networks:
135 ips = network.getElementsByTagName('ip')
137 if ip.getAttribute("family")=='ipv6':
138 network.removeChild(ip)
142 def check_if_ipv6_is_different(dom, ipv6addr, prefix):
143 netnodes = dom.getElementsByTagName('network')
144 for netnode in netnodes:
145 ips = netnode.getElementsByTagName('ip')
147 if ip.getAttribute('family')=='ipv6' and \
148 not ( re.match(r'fe80(.*)', ip.getAttribute("address"), re.I) ) and \
149 (ip.getAttribute('address')!=ipv6addr or ip.getAttribute('prefix')!=prefix) :
150 logger.log("ipv6: IPv6 address or prefix are different. Change detected!")
155 def set_autostart(network):
157 network.setAutostart(1)
159 logger.log("ipv6: network could not set to autostart")
162 def set_up(networkLibvirt, connLibvirt, networkElem, ipv6addr, prefix):
163 newXml = networkElem.toxml()
164 #logger.log(networkElem.toxml())
167 # logger.log(repr(method))
168 networkLibvirt.undefine()
169 networkLibvirt.destroy()
170 connLibvirt.networkCreateXML(newXml)
171 networkDefault = connLibvirt.networkDefineXML(newXml)
172 set_autostart(networkDefault)
173 commandForwarding = ['sysctl', '-w', 'net.ipv6.conf.all.forwarding=1']
174 logger.log_call(commandForwarding, timeout=15*60)
179 MinRtrAdvInterval 30;
180 MaxRtrAdvInterval 100;
181 prefix %(ipv6addr)s/%(prefix)s
190 with open(radvd_conf_file,'w') as f:
194 logger.log("ipv6: set up process finalized -- enabled IPv6 address to the slivers!")
196 def clean_up(networkLibvirt, connLibvirt, networkElem):
197 dom = remove_ipv6(networkElem)
199 networkLibvirt.undefine()
200 networkLibvirt.destroy()
201 # TODO: set autostart for the network
202 connLibvirt.networkCreateXML(newXml)
203 networkDefault = connLibvirt.networkDefineXML(newXml)
204 set_autostart(networkDefault)
206 logger.log("ipv6: cleanup process finalized. The IPv6 support on the slivers was removed.")
209 command_kill_radvd = ['killall', 'radvd']
210 logger.log_call(command_kill_radvd, timeout=15*60)
213 commandRadvd = ['radvd']
214 logger.log_call(commandRadvd, timeout=15*60)
216 def GetSlivers(data, config, plc):
220 interfaces = data['interfaces']
221 logger.log(repr(interfaces))
222 for interface in interfaces:
223 logger.log('ipv6: get interface: %r'%(interface))
224 if 'interface_tag_ids' in interface:
225 interface_tag_ids = "interface_tag_ids"
226 interface_tag_id = "interface_tag_id"
227 settings = plc.GetInterfaceTags({interface_tag_id:interface[interface_tag_ids]})
228 is_slivers_ipv6_prefix_set = False
229 for setting in settings:
230 if setting['tagname']==sliversipv6prefixtag:
231 ipv6addrprefix = setting['value'].split('/', 1)
232 ipv6addr = ipv6addrprefix[0]
234 logger.log("ipv6: len(ipv6addrprefix)=%s" % (len(ipv6addrprefix)) )
235 if len(ipv6addrprefix)>1:
236 prefix = ipv6addrprefix[1]
237 logger.log("ipv6: prefix=%s" % (prefix) )
238 if int(prefix)>0 and int(prefix)<=64:
244 logger.log("ipv6: '%s'=%s" % (sliversipv6prefixtag,ipv6addr) )
245 valid_ipv6 = tools.is_valid_ipv6(ipv6addr)
247 logger.log("ipv6: the 'sliversipv6prefix' tag presented a non-valid IPv6 address!")
248 elif not(valid_prefix):
249 logger.log("ipv6: the '%s' tag does not present a valid prefix (e.g., '/64', '/58')!" % \
250 (sliversipv6prefixtag))
252 # connecting to the libvirtd
253 connLibvirt = Sliver_Libvirt.getConnection(type)
254 list = connLibvirt.listAllNetworks()
255 for networkLibvirt in list:
256 xmldesc = networkLibvirt.XMLDesc()
257 dom = parseString(xmldesc)
258 has_ipv6 = check_for_ipv6(dom)
260 # let's first check if the IPv6 is different or is it the same...
261 is_different = check_if_ipv6_is_different(dom, ipv6addr, prefix)
263 logger.log("ipv6: tag 'sliversipv6prefix' was modified! " +
264 "Updating configuration with the new one...")
265 network_elem = change_ipv6(dom, ipv6addr, prefix)
266 set_up(networkLibvirt, connLibvirt, network_elem, ipv6addr, prefix)
267 logger.log("ipv6: trying to reboot the slivers...")
268 tools.reboot_slivers()
270 logger.log("ipv6: starting to redefine the virtual network...")
271 #network_elem = buildLibvirtDefaultNetConfig(dom,ipv6addr,prefix)
272 network_elem = add_ipv6(dom, ipv6addr, prefix)
273 set_up(networkLibvirt, connLibvirt, network_elem, ipv6addr, prefix)
274 logger.log("ipv6: trying to reboot the slivers...")
275 tools.reboot_slivers()
276 is_slivers_ipv6_prefix_set = True
277 if not(is_slivers_ipv6_prefix_set):
278 # connecting to the libvirtd
279 connLibvirt = Sliver_Libvirt.getConnection(type)
280 list = connLibvirt.listAllNetworks()
281 for networkLibvirt in list:
282 xmldesc = networkLibvirt.XMLDesc()
283 dom = parseString(xmldesc)
284 if check_for_ipv6(dom):
285 clean_up(networkLibvirt, connLibvirt, dom)
286 logger.log("ipv6: trying to reboot the slivers...")
287 tools.reboot_slivers()
289 logger.log("ipv6: all done!")