10 from sfa.util.misc 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, caller_cred=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.caller_cred=caller_cred
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_remote_resources(self, hrn = None):
92 # convert and threshold to ints
93 if self.has_key('timestamp') and self['timestamp']:
94 hr_timestamp = self['timestamp']
95 timestamp = datetime.datetime.fromtimestamp(time.mktime(time.strptime(hr_timestamp, self.api.time_format)))
96 hr_threshold = self['threshold']
97 threshold = datetime.datetime.fromtimestamp(time.mktime(time.strptime(hr_threshold, self.api.time_format)))
99 timestamp = datetime.datetime.now()
100 hr_timestamp = timestamp.strftime(self.api.time_format)
101 delta = datetime.timedelta(hours=self.ttl)
102 threshold = timestamp + delta
103 hr_threshold = threshold.strftime(self.api.time_format)
105 start_time = int(timestamp.strftime("%s"))
106 end_time = int(threshold.strftime("%s"))
107 duration = end_time - start_time
109 aggregates = Aggregates(self.api)
113 credential = self.api.getCredential()
114 for aggregate in aggregates:
115 if aggregate not in [self.api.auth.client_cred.get_gid_caller().get_hrn()]:
117 caller_cred = self.caller_cred
118 # get the rspec from the aggregate
121 agg_rspec = aggregates[aggregate].get_resources(credential, hrn, request_hash, caller_cred)
123 arg_list = [credential, hrn]
124 request_hash = self.api.key.compute_hash(arg_list)
125 agg_rspec = aggregates[aggregate].get_resources(credential, hrn, request_hash, caller_cred)
126 # extract the netspec from each aggregates rspec
127 rspec.parseString(agg_rspec)
128 networks.extend([{'NetSpec': rspec.getDictsByTagName('NetSpec')}])
130 # XX print out to some error log
131 print >> log, "Error getting resources at aggregate %s" % aggregate
132 traceback.print_exc(log)
133 print >> log, "%s" % (traceback.format_exc())
134 # create the rspec dict
135 resources = {'networks': networks, 'start_time': start_time, 'duration': duration}
136 resourceDict = {'RSpec': resources}
137 # convert rspec dict to xml
138 rspec.parseDict(resourceDict)
141 def refresh_nodes_smgr(self):
143 rspec = self.get_remote_resources()
144 # filter according to policy
145 blist = self.policy['node_blacklist']
146 wlist = self.policy['node_whitelist']
147 rspec.filter('NodeSpec', 'name', blacklist=blist, whitelist=wlist)
149 # update timestamp and threshold
150 timestamp = datetime.datetime.now()
151 hr_timestamp = timestamp.strftime(self.api.time_format)
152 delta = datetime.timedelta(hours=self.ttl)
153 threshold = timestamp + delta
154 hr_threshold = threshold.strftime(self.api.time_format)
156 nodedict = {'rspec': rspec.toxml(),
157 'timestamp': hr_timestamp,
158 'threshold': hr_threshold}
160 self.update(nodedict)
163 def get_rspec(self, hrn = None):
165 if self.api.interface in ['slicemgr']:
166 return self.get_rspec_smgr(hrn)
167 elif self.api.interface in ['aggregate']:
168 return self.get_rspec_aggregate(hrn)
170 def get_rspec_smgr(self, hrn = None):
172 rspec = self.get_remote_resources(hrn)
175 def get_rspec_aggregate(self, hrn = None):
177 Get resource information from PLC
181 # Get the required nodes
183 nodes = self.api.plshell.GetNodes(self.api.plauth, {'peer_id': None})
184 try: linkspecs = self.api.plshell.GetLinkSpecs() # if call is supported
185 except: linkspecs = []
187 slicename = hrn_to_pl_slicename(hrn)
188 slices = self.api.plshell.GetSlices(self.api.plauth, [slicename])
193 node_ids = slice['node_ids']
194 nodes = self.api.plshell.GetNodes(self.api.plauth, {'peer_id': None, 'node_id': node_ids})
196 # Filter out whitelisted nodes
197 public_nodes = lambda n: n.has_key('slice_ids_whitelist') and not n['slice_ids_whitelist']
199 # ...only if they are not already assigned to this slice.
201 nodes = filter(public_nodes, nodes)
203 # Get all network interfaces
206 # The field name has changed in plcapi 4.3
207 if self.api.plshell_version in ['4.2']:
208 interface_ids.extend(node['nodenetwork_ids'])
209 elif self.api.plshell_version in ['4.3']:
210 interface_ids.extend(node['interface_ids'])
212 raise GeniAPIError, "Unsupported plcapi version ", \
213 self.api.plshell_version
215 if self.api.plshell_version in ['4.2']:
216 interfaces = self.api.plshell.GetNodeNetworks(self.api.plauth, interface_ids)
217 elif self.api.plshell_version in ['4.3']:
218 interfaces = self.api.plshell.GetInterfaces(self.api.plauth, interface_ids)
220 raise GeniAPIError, "Unsupported plcapi version ", \
221 self.api.plshell_version
223 for interface in interfaces:
224 if self.api.plshell_version in ['4.2']:
225 interface_dict[interface['nodenetwork_id']] = interface
226 elif self.api.plshell_version in ['4.3']:
227 interface_dict[interface['interface_id']] = interface
229 raise GeniAPIError, "Unsupported plcapi version", \
230 self.api.plshell_version
232 # join nodes with thier interfaces
234 node['interfaces'] = []
235 if self.api.plshell_version in ['4.2']:
236 for nodenetwork_id in node['nodenetwork_ids']:
237 node['interfaces'].append(interface_dict[nodenetwork_id])
238 elif self.api.plshell_version in ['4.3']:
239 for interface_id in node['interface_ids']:
240 node['interfaces'].append(interface_dict[interface_id])
242 raise GeniAPIError, "Unsupported plcapi version", \
243 self.api.plshell_version
245 # convert and threshold to ints
246 if self.has_key('timestamp') and self['timestamp']:
247 timestamp = datetime.datetime.fromtimestamp(time.mktime(time.strptime(self['timestamp'], self.api.time_format)))
248 threshold = datetime.datetime.fromtimestamp(time.mktime(time.strptime(self['threshold'], self.api.time_format)))
250 timestamp = datetime.datetime.now()
251 delta = datetime.timedelta(hours=self.ttl)
252 threshold = timestamp + delta
254 start_time = int(timestamp.strftime("%s"))
255 end_time = int(threshold.strftime("%s"))
256 duration = end_time - start_time
258 # create the plc dict
259 networks = [{'nodes': nodes,
260 'name': self.api.hrn,
261 'start_time': start_time,
262 'duration': duration}]
264 networks[0]['links'] = linkspecs
265 resources = {'networks': networks, 'start_time': start_time, 'duration': duration}
267 # convert the plc dict to an rspec dict
268 resourceDict = RSpecDict(resources)
269 # convert the rspec dict to xml
271 rspec.parseDict(resourceDict)