import os import sys import datetime import time import xmlrpclib from geni.util.geniserver import GeniServer from geni.util.geniclient import * from geni.util.cert import Keypair, Certificate from geni.util.credential import Credential from geni.util.trustedroot import TrustedRootList from geni.util.excep import * from geni.util.misc import * from geni.util.config import Config from geni.util.rspec import Rspec from geni.util.specdict import * from geni.util.storage import SimpleStorage class Aggregate(GeniServer): hrn = None nodes_ttl = None nodes = None slices = None policy = None timestamp = None threshold = None shell = None registry = None key_file = None cert_file = None credential = None ## # Create a new aggregate object. # # @param ip the ip address to listen on # @param port the port to listen on # @param key_file private key filename of registry # @param cert_file certificate filename containing public key (could be a GID file) def __init__(self, ip, port, key_file, cert_file, config = "/usr/share/geniwrapper/geni/util/geni_config"): GeniServer.__init__(self, ip, port, key_file, cert_file) self.key_file = key_file self.cert_file = cert_file self.config = Config(config) self.basedir = self.config.GENI_BASE_DIR + os.sep self.server_basedir = self.basedir + os.sep + "geni" + os.sep self.hrn = self.config.GENI_INTERFACE_HRN nodes_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.components']) self.nodes = SimpleStorage(nodes_file) self.nodes.load() slices_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.slices']) self.slices = SimpleStorage(slices_file) self.slices.load() policy_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.policy']) self.policy = SimpleStorage(policy_file, {'whitelist': [], 'blacklist': []}) self.policy.load() timestamp_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.timestamp']) self.timestamp = SimpleStorage(timestamp_file) # How long before we refresh nodes cache self.nodes_ttl = 1 self.connectPLC() self.connectRegistry() #self.loadCredential() def connectRegistry(self): """ Connect to the registry """ # connect to registry using GeniClient address = self.config.GENI_REGISTRY_HOSTNAME port = self.config.GENI_REGISTRY_PORT url = 'https://%(address)s:%(port)s' % locals() self.registry = GeniClient(url, self.key_file, self.cert_file) def connectPLC(self): """ Connect to the plc api interface. First attempt to impor thte shell, if that fails try to connect to the xmlrpc server. """ self.auth = {'Username': self.config.GENI_PLC_USER, 'AuthMethod': 'password', 'AuthString': self.config.GENI_PLC_PASSWORD} try: # try to import PLC.Shell directly sys.path.append(self.config.GENI_PLC_SHELL_PATH) import PLC.Shell self.shell = PLC.Shell.Shell(globals()) self.shell.AuthCheck() except ImportError: # connect to plc api via xmlrpc plc_host = self.config.GENI_PLC_HOST plc_port = self.config.GENI_PLC_PORT plc_api_path = self.config.GENI_PLC_API_PATH url = "https://%(plc_host)s:%(plc_port)s/%(plc_api_path)s/" % locals() self.auth = {'Username': self.config.GENI_PLC_USER, 'AuthMethod': 'password', 'AuthString': self.config.GENI_PLC_PASSWORD} self.shell = xmlrpclib.Server(url, verbose = 0, allow_none = True) self.shell.AuthCheck(self.auth) def loadCredential(self): """ Attempt to load credential from file if it exists. If it doesnt get credential from registry. """ self_cred_filename = self.server_basedir + os.sep + "agg." + self.hrn + ".cred" ma_cred_filename = self.server_basedir + os.sep + "agg." + self.hrn + ".ma.cred" # see if this file exists try: cred = Credential(filename = ma_cred_filename, subject=self.hrn) self.credential = cred.save_to_string() except IOError: # get self credential self_cred = self.registry.get_credential(None, 'ma', self.hrn) self_credential = Credential(string = self_cred) self_credential.save_to_file(self_cred_filename) # get ma credential ma_cred = self.registry.get_credential(self_cred) ma_credential = Credential(string = ma_cred) ma_credential.save_to_file(ma_cred_filename) self.credential = ma_cred def hostname_to_hrn(self, login_base, hostname): """ Convert hrn to plantelab name. """ genihostname = "_".join(hostname.split(".")) return ".".join([self.hrn, login_base, genihostname]) def slicename_to_hrn(self, slicename): """ Convert hrn to planetlab name. """ slicename = slicename.replace("_", ".") return ".".join([self.hrn, slicename]) def refresh_components(self): """ Update the cached list of nodes and save in 4 differnt formats (rspec, dns, ip, hrn) """ node_details = {} # get node list in rspec format rspec = Rspec() rspec.parseString(self.get_rspec(self.hrn, 'aggregate')) # filter nodes according to policy rspec.filter('NodeSpec', 'name', blacklist=self.policy['blacklist'], whitelist=self.policy['whitelist']) # extract ifspec info to get ip's ips = [] ifspecs = rspec.getDictsByTagName('IfSpec') for ifspec in ifspecs: if ifspec.has_key('addr') and ifspec['addr']: ips.append(ifspec['addr']) # resolve component hostnames nodes = self.shell.GetNodes(self.auth, {}, ['hostname', 'site_id', 'slice_ids_whitelist']) # resolve site login_bases site_ids = [node['site_id'] for node in nodes] sites = self.shell.GetSites(self.auth, site_ids, ['site_id', 'login_base']) site_dict = {} for site in sites: site_dict[site['site_id']] = site['login_base'] # filter nodes according to policy policy # filter nodes with whitelist # convert plc names to geni hrn nodedict = {} for node in nodes: node_hrn = self.hostname_to_hrn(site_dict[node['site_id']], node['hostname']) # filter nodes with a whitelist if node.has_key('slice_ids_whitelist') and node['slice_ids_whitelist']: continue # Do not allow nodes not found in whitelist policy if self.policy['whitelist'] and node_hrn not in self.polciy['whitelist']: continue # Do not allow nodes found in blacklist policy if self.policy['blacklist'] and node_hrn in self.policy['blacklist']: continue nodedict[node_hrn] = node['hostname'] node_details['rspec'] = rspec.toxml() node_details['hrn'] = nodedict.keys() node_details['dns'] = nodedict.values() node_details['ip'] = ips # save state self.nodes = SimpleStorage(self.nodes.db_filename, node_details) self.nodes.write() # update timestamp and threshold self.timestamp['timestamp'] = datetime.datetime.now() delta = datetime.timedelta(hours=self.nodes_ttl) self.threshold = self.timestamp['timestamp'] + delta self.timestamp.write() def load_components(self): """ Read cached list of nodes. """ # Read component list from cached file self.nodes.load() self.timestamp.load() time_format = "%Y-%m-%d %H:%M:%S" timestamp = self.timestamp['timestamp'] self.timestamp['timestamp'] = datetime.datetime.fromtimestamp(time.mktime(time.strptime(timestamp, time_format))) delta = datetime.timedelta(hours=self.nodes_ttl) self.threshold = self.timestamp['timestamp'] + delta def load_policy(self): """ Read the list of blacklisted and whitelisted nodes. """ self.policy.load() def getNodes(self, format = 'rspec'): """ Return a list of components at this aggregate. """ valid_formats = ['rspec', 'hrn', 'dns', 'ip'] if not format: format = 'rspec' if format not in valid_formats: raise Exception, "Invalid format specified, must be one of the following: %s" \ % ", ".join(valid_formats) # Reload components list now = datetime.datetime.now() #self.load_components() if not self.threshold or not self.timestamp['timestamp'] or now > self.threshold: self.refresh_components() elif now < self.threshold and not self.nodes.keys(): self.load_components() return self.nodes[format] def getSlices(self): """ Return a list of instnatiated managed by this slice manager. """ slices = self.shell.GetSlices(self.auth, {}, ['name']) slice_hrns = [self.slicename_to_hrn(slice['name']) for slice in slices] return slice_hrns def get_rspec(self, hrn, type): """ Get resource information from PLC """ # Get the required nodes if type in ['aggregate']: nodes = self.shell.GetNodes(self.auth) elif type in ['slice']: slicename = hrn_to_pl_slicename(hrn) slices = self.shell.GetSlices(self.auth, [slicename]) node_ids = slices[0]['node_ids'] nodes = self.shell.GetNodes(self.auth, node_ids) # Filter out whitelisted nodes public_nodes = lambda n: n.has_key('slice_ids_whitelist') and not n['slice_ids_whitelist'] nodes = filter(public_nodes, nodes) # Get all network interfaces interface_ids = [] for node in nodes: interface_ids.extend(node['nodenetwork_ids']) interfaces = self.shell.GetNodeNetworks(self.auth, interface_ids) interface_dict = {} for interface in interfaces: interface_dict[interface['nodenetwork_id']] = interface # join nodes with thier interfaces for node in nodes: node['interfaces'] = [] for nodenetwork_id in node['nodenetwork_ids']: node['interfaces'].append(interface_dict[nodenetwork_id]) # convert and threshold to ints if self.timestamp.has_key('timestamp') and self.timestamp['timestamp']: timestamp = self.timestamp['timestamp'] threshold = self.threshold else: timestamp = datetime.datetime.now() delta = datetime.timedelta(hours=self.nodes_ttl) threshold = timestamp + delta start_time = int(timestamp.strftime("%s")) end_time = int(threshold.strftime("%s")) duration = end_time - start_time # create the plc dict networks = [{'nodes': nodes, 'name': self.hrn, 'start_time': start_time, 'duration': duration}] resources = {'networks': networks, 'start_time': start_time, 'duration': duration} # convert the plc dict to an rspec dict resourceDict = RspecDict(resources) # convert the rspec dict to xml rspec = Rspec() rspec.parseDict(resourceDict) return rspec.toxml() def getResources(self, slice_hrn): """ Return the current rspec for the specified slice. """ rspec = self.get_rspec(slice_hrn, 'slice') return rspec def getTicket(self, hrn, rspec): """ Retrieve a ticket. This operation is currently implemented on PLC only (see SFA, engineering decisions); it is not implemented on components. @param name name of the slice to retrieve a ticket for @param rspec resource specification dictionary @return the string representation of a ticket object """ #self.registry.get_ticket(name, rspec) return def createSlice(self, slice_hrn, rspec, attributes = []): """ Instantiate the specified slice according to whats defined in the rspec. """ spec = Rspec(rspec) # save slice state locally # we can assume that spec object has been validated so its safer to # save this instead of the unvalidated rspec the user gave us self.slices[slice_hrn] = spec.toxml() self.slices.write() # Get slice info slicename = hrn_to_pl_slicename(slice_hrn) slices = self.shell.GetSlices(self.auth, [slicename], ['node_ids']) if not slices: raise RecordNotFound(slice_hrn) slice = slices[0] # find out where this slice is currently running nodes = self.shell.GetNodes(self.auth, slice['node_ids'], ['hostname']) hostnames = [node['hostname'] for node in nodes] # get netspec details nodespecs = spec.getDictsByTagName('NodeSpec') nodes = [nodespec['name'] for nodespec in nodespecs] # save slice state locally # we can assume that spec object has been validated so its safer to # save this instead of the unvalidated rspec the user gave us self.slices[slice_hrn] = spec.toxml() self.slices.write() # remove nodes not in rspec deleted_nodes = list(set(hostnames).difference(nodes)) # add nodes from rspec added_nodes = list(set(nodes).difference(hostnames)) self.shell.AddSliceToNodes(self.auth, slicename, added_nodes) self.shell.DeleteSliceFromNodes(self.auth, slicename, deleted_nodes) for attribute in attributes: type, value, node, nodegroup = attribute['type'], attribute['value'], attribute['node'], attribute['nodegroup'] self.shell.AddSliceAttribute(self.auth, slicename, type, value, node, nodegroup) # contact registry to get slice users and add them to the slice #slice_record = self.registry.resolve(self.credential, slice_hrn) # persons = slice_record['users'] #for person in persons: # shell.AddPersonToSlice(person['email'], slice_name) return 1 def updateSlice(self, slice_hrn, rspec, attributes = []): return self.create_slice(slice_hrn, rspec, attributes) def deleteSlice(self, slice_hrn): """ Remove this slice from all components it was previouly associated with and free up the resources it was using. """ if self.slices.has_key(slice_hrn): self.slices.pop(slice_hrn) self.slices.write() slicename = hrn_to_pl_slicename(slice_hrn) slices = self.shell.GetSlices(self.auth, [slicename]) if not slices: return 1 slice = slices[0] self.shell.DeleteSliceFromNodes(self.auth, slicename, slice['node_ids']) return 1 def startSlice(self, slice_hrn): """ Stop the slice at plc. """ slicename = hrn_to_pl_slicename(slice_hrn) slices = self.shell.GetSlices(self.auth, {'name': slicename}, ['slice_id']) if not slices: #raise RecordNotFound(slice_hrn) return 1 slice_id = slices[0] atrribtes = self.shell.GetSliceAttributes({'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id']) attribute_id = attreibutes[0] self.shell.UpdateSliceAttribute(self.auth, attribute_id, "1" ) return 1 def stopSlice(self, slice_hrn): """ Stop the slice at plc """ slicename = hrn_to_pl_slicename(slice_hrn) slices = self.shell.GetSlices(self.auth, {'name': slicename}, ['slice_id']) if not slices: #raise RecordNotFound(slice_hrn) return 1 slice_id = slices[0] atrribtes = self.shell.GetSliceAttributes({'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id']) attribute_id = attreibutes[0] self.shell.UpdateSliceAttribute(self.auth, attribute_id, "0") return 1 def resetSlice(self, slice_hrn): """ Reset the slice """ # XX not yet implemented return 1 def getPolicy(self): """ Return this aggregates policy. """ return self.policy ############################## ## Server methods here for now ############################## # XX fix rights, should be function name defined in # privilege_table (from util/rights.py) def list_nodes(self, cred): self.decode_authentication(cred, 'listnodes') return self.getNodes() def list_slices(self, cred): self.decode_authentication(cred, 'listslices') return self.getSlices() def get_resources(self, cred, hrn): self.decode_authentication(cred, 'listnodes') return self.getResources(hrn) def get_ticket(self, cred, hrn, rspec): self.decode_authentication(cred, 'getticket') return self.getTicket(hrn, rspec) def get_policy(self, cred): self.decode_authentication(cred, 'getpolicy') return self.getPolicy() def create_slice(self, cred, hrn, rspec): self.decode_authentication(cred, 'createslice') return self.createSlice(hrn, rspec) def update_slice(self, cred, hrn, rspec): self.decode_authentication(cred, 'updateslice') return self.updateSlice(hrn) def delete_slice(self, cred, hrn): self.decode_authentication(cred, 'deleteslice') return self.deleteSlice(hrn) def start_slice(self, cred, hrn): self.decode_authentication(cred, 'startslice') return self.startSlice(hrn) def stop_slice(self, cred, hrn): self.decode_authentication(cred, 'stopslice') return self.stopSlice(hrn) def reset_slice(self, cred, hrn): self.decode_authentication(cred, 'resetslice') return self.resetSlice(hrn) def register_functions(self): GeniServer.register_functions(self) # Aggregate interface methods self.server.register_function(self.list_nodes) self.server.register_function(self.list_slices) self.server.register_function(self.get_resources) self.server.register_function(self.get_policy) self.server.register_function(self.create_slice) self.server.register_function(self.update_slice) self.server.register_function(self.delete_slice) self.server.register_function(self.start_slice) self.server.register_function(self.stop_slice) self.server.register_function(self.reset_slice)