10 from sfa.util.namespace import *
11 from sfa.util.rspec import *
12 from sfa.util.specdict import *
13 from sfa.util.faults import *
14 from sfa.util.storage import *
15 from sfa.util.debug import log
16 from sfa.util.rspec import *
17 from sfa.util.specdict import *
18 from sfa.util.policy import Policy
19 from sfa.server.aggregate import Aggregates
21 class Nodes(SimpleStorage):
23 def __init__(self, api, ttl = 1, origin_hrn=None):
27 path = self.api.config.SFA_DATA_DIR
28 filename = ".".join([self.api.interface, self.api.hrn, "nodes"])
29 filepath = path + os.sep + filename
30 self.nodes_file = filepath
31 SimpleStorage.__init__(self, self.nodes_file)
32 self.policy = Policy(api)
34 self.origin_hrn = origin_hrn
39 Update the cached list of nodes
42 # Reload components list
43 now = datetime.datetime.now()
44 if not self.has_key('threshold') or not self.has_key('timestamp') or \
45 now > datetime.datetime.fromtimestamp(time.mktime(time.strptime(self['threshold'], self.api.time_format))):
46 if self.api.interface in ['aggregate']:
47 self.refresh_nodes_aggregate()
48 elif self.api.interface in ['slicemgr']:
49 self.refresh_nodes_smgr()
51 def refresh_nodes_aggregate(self):
53 rspec.parseString(self.get_rspec())
55 # filter nodes according to policy
56 blist = self.policy['node_blacklist']
57 wlist = self.policy['node_whitelist']
58 rspec.filter('NodeSpec', 'name', blacklist=blist, whitelist=wlist)
60 # extract ifspecs from rspec to get ips'
62 ifspecs = rspec.getDictsByTagName('IfSpec')
63 for ifspec in ifspecs:
64 if ifspec.has_key('addr') and ifspec['addr']:
65 ips.append(ifspec['addr'])
67 # extract nodespecs from rspec to get dns names
69 nodespecs = rspec.getDictsByTagName('NodeSpec')
70 for nodespec in nodespecs:
71 if nodespec.has_key('name') and nodespec['name']:
72 hostnames.append(nodespec['name'])
74 # update timestamp and threshold
75 timestamp = datetime.datetime.now()
76 hr_timestamp = timestamp.strftime(self.api.time_format)
77 delta = datetime.timedelta(hours=self.ttl)
78 threshold = timestamp + delta
79 hr_threshold = threshold.strftime(self.api.time_format)
82 node_details['rspec'] = rspec.toxml()
83 node_details['ip'] = ips
84 node_details['dns'] = hostnames
85 node_details['timestamp'] = hr_timestamp
86 node_details['threshold'] = hr_threshold
88 self.update(node_details)
91 def get_rspec_smgr(self, xrn = None):
92 hrn, type = urn_to_hrn(xrn)
93 # convert and threshold to ints
94 if self.has_key('timestamp') and self['timestamp']:
95 hr_timestamp = self['timestamp']
96 timestamp = datetime.datetime.fromtimestamp(time.mktime(time.strptime(hr_timestamp, self.api.time_format)))
97 hr_threshold = self['threshold']
98 threshold = datetime.datetime.fromtimestamp(time.mktime(time.strptime(hr_threshold, self.api.time_format)))
100 timestamp = datetime.datetime.now()
101 hr_timestamp = timestamp.strftime(self.api.time_format)
102 delta = datetime.timedelta(hours=self.ttl)
103 threshold = timestamp + delta
104 hr_threshold = threshold.strftime(self.api.time_format)
106 start_time = int(timestamp.strftime("%s"))
107 end_time = int(threshold.strftime("%s"))
108 duration = end_time - start_time
110 aggregates = Aggregates(self.api)
114 credential = self.api.getCredential()
115 origin_hrn = self.origin_hrn
116 for aggregate in aggregates:
117 if aggregate not in [self.api.auth.client_cred.get_gid_caller().get_hrn()]:
119 # get the rspec from the aggregate
120 agg_rspec = aggregates[aggregate].get_resources(credential, xrn, origin_hrn)
121 # extract the netspec from each aggregates rspec
122 rspec.parseString(agg_rspec)
123 networks.extend([{'NetSpec': rspec.getDictsByTagName('NetSpec')}])
125 # XX print out to some error log
126 print >> log, "Error getting resources at aggregate %s" % aggregate
127 traceback.print_exc(log)
128 print >> log, "%s" % (traceback.format_exc())
129 # create the rspec dict
130 resources = {'networks': networks, 'start_time': start_time, 'duration': duration}
131 resourceDict = {'RSpec': resources}
132 # convert rspec dict to xml
133 rspec.parseDict(resourceDict)
136 def refresh_nodes_smgr(self):
138 rspec = RSpec(xml=self.get_rspec_smgr())
139 # filter according to policy
140 blist = self.policy['node_blacklist']
141 wlist = self.policy['node_whitelist']
142 rspec.filter('NodeSpec', 'name', blacklist=blist, whitelist=wlist)
144 # update timestamp and threshold
145 timestamp = datetime.datetime.now()
146 hr_timestamp = timestamp.strftime(self.api.time_format)
147 delta = datetime.timedelta(hours=self.ttl)
148 threshold = timestamp + delta
149 hr_threshold = threshold.strftime(self.api.time_format)
151 nodedict = {'rspec': rspec.toxml(),
152 'timestamp': hr_timestamp,
153 'threshold': hr_threshold}
155 self.update(nodedict)
158 def get_rspec(self, xrn = None):
160 if self.api.interface in ['slicemgr']:
161 return self.get_rspec_smgr(xrn)
162 elif self.api.interface in ['aggregate']:
163 return self.get_rspec_aggregate(xrn)
165 def get_rspec_aggregate(self, xrn = None):
167 Get resource information from PLC
169 hrn, type = urn_to_hrn(xrn)
171 # Get the required nodes
173 nodes = self.api.plshell.GetNodes(self.api.plauth, {'peer_id': None})
174 try: linkspecs = self.api.plshell.GetLinkSpecs() # if call is supported
175 except: linkspecs = []
177 slicename = hrn_to_pl_slicename(hrn)
178 slices = self.api.plshell.GetSlices(self.api.plauth, [slicename])
183 node_ids = slice['node_ids']
184 nodes = self.api.plshell.GetNodes(self.api.plauth, {'peer_id': None, 'node_id': node_ids})
186 # Filter out whitelisted nodes
187 public_nodes = lambda n: n.has_key('slice_ids_whitelist') and not n['slice_ids_whitelist']
189 # ...only if they are not already assigned to this slice.
191 nodes = filter(public_nodes, nodes)
193 # Get all network interfaces
196 # The field name has changed in plcapi 4.3
197 if self.api.plshell_version in ['4.2']:
198 interface_ids.extend(node['nodenetwork_ids'])
199 elif self.api.plshell_version in ['4.3']:
200 interface_ids.extend(node['interface_ids'])
202 raise SfaAPIError, "Unsupported plcapi version ", \
203 self.api.plshell_version
205 if self.api.plshell_version in ['4.2']:
206 interfaces = self.api.plshell.GetNodeNetworks(self.api.plauth, interface_ids)
207 elif self.api.plshell_version in ['4.3']:
208 interfaces = self.api.plshell.GetInterfaces(self.api.plauth, interface_ids)
210 raise SfaAPIError, "Unsupported plcapi version ", \
211 self.api.plshell_version
213 for interface in interfaces:
214 if self.api.plshell_version in ['4.2']:
215 interface_dict[interface['nodenetwork_id']] = interface
216 elif self.api.plshell_version in ['4.3']:
217 interface_dict[interface['interface_id']] = interface
219 raise SfaAPIError, "Unsupported plcapi version", \
220 self.api.plshell_version
222 # join nodes with thier interfaces
224 node['interfaces'] = []
225 if self.api.plshell_version in ['4.2']:
226 for nodenetwork_id in node['nodenetwork_ids']:
227 node['interfaces'].append(interface_dict[nodenetwork_id])
228 elif self.api.plshell_version in ['4.3']:
229 for interface_id in node['interface_ids']:
230 node['interfaces'].append(interface_dict[interface_id])
232 raise SfaAPIError, "Unsupported plcapi version", \
233 self.api.plshell_version
235 # convert and threshold to ints
236 if self.has_key('timestamp') and self['timestamp']:
237 timestamp = datetime.datetime.fromtimestamp(time.mktime(time.strptime(self['timestamp'], self.api.time_format)))
238 threshold = datetime.datetime.fromtimestamp(time.mktime(time.strptime(self['threshold'], self.api.time_format)))
240 timestamp = datetime.datetime.now()
241 delta = datetime.timedelta(hours=self.ttl)
242 threshold = timestamp + delta
244 start_time = int(timestamp.strftime("%s"))
245 end_time = int(threshold.strftime("%s"))
246 duration = end_time - start_time
248 # create the plc dict
249 networks = [{'nodes': nodes,
250 'name': self.api.hrn,
251 'start_time': start_time,
252 'duration': duration}]
254 networks[0]['links'] = linkspecs
255 resources = {'networks': networks, 'start_time': start_time, 'duration': duration}
257 # convert the plc dict to an rspec dict
258 resourceDict = RSpecDict(resources)
259 # convert the rspec dict to xml
261 rspec.parseDict(resourceDict)