import os import sys import datetime import time from geni.util.geniserver import * from geni.util.geniclient import * from geni.util.cert import * from geni.util.credential import Credential from geni.util.trustedroot import * from geni.util.excep import * from geni.util.misc import * from geni.util.config import * from geni.util.rspec import Rspec from geni.util.specdict import * from geni.util.storage import SimpleStorage, XmlStorage class SliceMgr(GeniServer): hrn = None nodes_ttl = None nodes = None slices = None policy = None aggregates = None timestamp = None threshold = None shell = None registry = None key_file = None cert_file = None credential = None ## # Create a new slice manager 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 self.time_format = "%Y-%m-%d %H:%M:%S" # Get list of aggregates this sm talks to aggregates_file = self.server_basedir + os.sep + 'aggregates.xml' connection_dict = {'hrn': '', 'addr': '', 'port': ''} self.aggregate_info = XmlStorage(aggregates_file, {'aggregates': {'aggregate': [connection_dict]}} ) self.aggregate_info.load() # Get cached list of nodes (rspec) nodes_file = os.sep.join([self.server_basedir, 'smgr.' + self.hrn + '.components']) self.nodes = SimpleStorage(nodes_file) self.nodes.load() # Get cacheds slice states slices_file = os.sep.join([self.server_basedir, 'smgr.' + self.hrn + '.slices']) self.slices = SimpleStorage(slices_file) self.slices.load() # Get the policy policy_file = os.sep.join([self.server_basedir, 'smgr.' + self.hrn + '.policy']) self.policy = SimpleStorage(policy_file, {'whitelist': [], 'blacklist': []}) self.policy.load() # How long before we refresh nodes cache self.nodes_ttl = 1 self.connectRegistry() self.loadCredential() self.connectAggregates() def loadCredential(self): """ Attempt to load credential from file if it exists. If it doesnt get credential from registry. """ # see if this file exists ma_cred_filename = self.server_basedir + os.sep + "smgr." + self.hrn + ".sa.cred" try: self.credential = Credential(filename = ma_cred_filename) except IOError: self.credential = self.getCredentialFromRegistry() def getCredentialFromRegistry(self): """ Get our current credential from the registry. """ # get self credential self_cred_filename = self.server_basedir + os.sep + "smgr." + self.hrn + ".cred" self_cred = self.registry.get_credential(None, 'ma', self.hrn) self_cred.save_to_file(self_cred_filename, save_parents=True) # get ma credential ma_cred_filename = self.server_basedir + os.sep + "smgr." + self.hrn + ".sa.cred" ma_cred = self.registry.get_credential(self_cred, 'sa', self.hrn) ma_cred.save_to_file(ma_cred_filename, save_parents=True) return ma_cred 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 = 'http://%(address)s:%(port)s' % locals() self.registry = GeniClient(url, self.key_file, self.cert_file) def connectAggregates(self): """ Get connection details for the trusted peer aggregates from file and create a GeniClient connection to each. """ self.aggregates = {} aggregates = self.aggregate_info['aggregates']['aggregate'] if isinstance(aggregates, dict): aggregates = [aggregates] if isinstance(aggregates, list): for aggregate in aggregates: # create xmlrpc connection using GeniClient hrn, address, port = aggregate['hrn'], aggregate['addr'], aggregate['port'] if not hrn or not address or not port: continue url = 'http://%(address)s:%(port)s' % locals() self.aggregates[hrn] = GeniClient(url, self.key_file, self.cert_file) def item_hrns(self, items): """ Take a list of items (components or slices) and return a dictionary where the key is the authoritative hrn and the value is a list of items at that hrn. """ item_hrns = {} agg_hrns = self.aggregates.keys() for agg_hrn in agg_hrns: item_hrns[agg_hrn] = [] for item in items: for agg_hrn in agg_hrns: if item.startswith(agg_hrn): item_hrns[agg_hrn] = item return item_hrns 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. """ # convert and threshold to ints if self.nodes.has_key('timestamp') and self.nodes['timestamp']: hr_timestamp = self.nodes['timestamp'] timestamp = datetime.datetime.fromtimestamp(time.mktime(time.strptime(hr_timestamp, self.time_format))) hr_threshold = self.nodes['threshold'] threshold = datetime.datetime.fromtimestamp(time.mktime(time.strptime(hr_threshold, self.time_format))) else: timestamp = datetime.datetime.now() hr_timestamp = timestamp.strftime(self.time_format) delta = datetime.timedelta(hours=self.nodes_ttl) threshold = timestamp + delta hr_threshold = threshold.strftime(self.time_format) start_time = int(timestamp.strftime("%s")) end_time = int(threshold.strftime("%s")) duration = end_time - start_time aggregates = self.aggregates.keys() rspecs = {} networks = [] rspec = Rspec() for aggregate in aggregates: try: # get the rspec from the aggregate agg_rspec = self.aggregates[aggregate].list_nodes(self.credential) # extract the netspec from each aggregates rspec rspec.parseString(agg_rspec) networks.extend([{'NetSpec': rspec.getDictsByTagName('NetSpec')}]) except: # XX print out to some error log print "Error calling list nodes at aggregate %s" % aggregate raise # create the rspec dict resources = {'networks': networks, 'start_time': start_time, 'duration': duration} resourceDict = {'Rspec': resources} # convert rspec dict to xml rspec.parseDict(resourceDict) # filter according to policy rspec.filter('NodeSpec', 'name', blacklist=self.policy['blacklist'], whitelist=self.policy['whitelist']) # update timestamp and threshold timestamp = datetime.datetime.now() hr_timestamp = timestamp.strftime(self.time_format) delta = datetime.timedelta(hours=self.nodes_ttl) threshold = timestamp + delta hr_threshold = threshold.strftime(self.time_format) nodedict = {'rspec': rspec.toxml(), 'timestamp': hr_timestamp, 'threshold': hr_threshold} self.nodes = SimpleStorage(self.nodes.db_filename, nodedict) self.nodes.write() def load_policy(self): """ Read the list of blacklisted and whitelisted nodes. """ self.policy.load() def load_slices(self): """ Read current slice instantiation states. """ self.slices.load() def getNodes(self, format = 'rspec'): """ Return a list of components managed by this slice manager. """ # Reload components list if not self.nodes.has_key('threshold') or not self.nodes['threshold'] or not self.nodes.has_key('timestamp') or not self.nodes['timestamp']: self.refresh_components() else: now = datetime.datetime.now() threshold = datetime.datetime.fromtimestamp(time.mktime(time.strptime(self.nodes['threshold'], self.time_format))) if now > threshold: self.refresh_components() return self.nodes[format] def getSlices(self): """ Return a list of instnatiated managed by this slice manager. """ slice_hrns = [] for aggregate in self.aggregates: try: slices = self.aggregates[aggregate].list_slices(self.credential) slice_hrns.extend(slices) except: raise # print to some error log pass return slice_hrns def getResources(self, slice_hrn): """ Return the current rspec for the specified slice. """ # request this slices state from all known aggregates rspec = Rspec() rspecdicts = [] networks = [] for hrn in self.aggregates.keys(): # check if the slice has resources at this hrn slice_resources = self.aggregates[hrn].get_resources(self.credential, slice_hrn) rspec.parseString(slice_resources) networks.extend([{'NetSpec': rspec.getDictsByTagName('NetSpec')}]) # merge all these rspecs into one start_time = int(datetime.datetime.now().strftime("%s")) end_time = start_time duration = end_time - start_time resources = {'networks': networks, 'start_time': start_time, 'duration': duration} resourceDict = {'Rspec': resources} # convert rspec dict to xml rspec.parseDict(resourceDict) # save this slices resources #self.slices[slice_hrn] = rspec.toxml() #self.slices.write() return rspec.toxml() def createSlice(self, cred, slice_hrn, rspec): """ Instantiate the specified slice according to whats defined in the 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 spec = Rspec() tempspec = Rspec() spec.parseString(rspec) self.slices[slice_hrn] = spec.toxml() self.slices.write() # extract network list from the rspec and create a separate # rspec for each network slicename = hrn_to_pl_slicename(slice_hrn) specDict = spec.toDict() if specDict.has_key('Rspec'): specDict = specDict['Rspec'] if specDict.has_key('start_time'): start_time = specDict['start_time'] else: start_time = 0 if specDict.has_key('end_time'): end_time = specDict['end_time'] else: end_time = 0 rspecs = {} # only attempt to extract information about the aggregates we know about for hrn in self.aggregates.keys(): netspec = spec.getDictByTagNameValue('NetSpec', hrn) if netspec: # creat a plc dict resources = {'start_time': start_time, 'end_time': end_time, 'networks': netspec} resourceDict = {'Rspec': resources} tempspec.parseDict(resourceDict) rspecs[hrn] = tempspec.toxml() # notify the aggregates for hrn in rspecs.keys(): self.aggregates[hrn].create_slice(self.credential, slice_hrn, rspecs[hrn]) return 1 def updateSlice(self, slice_hrn, rspec, attributes = []): """ Update the specifed slice """ 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. """ # XX need to get the correct credential cred = self.credential if self.slices.has_key(slice_hrn): self.slices.pop(slice_hrn) self.slices.write() for hrn in self.aggregates.keys(): self.aggregates[hrn].deleteSlice(cred, slice_hrn) return 1 def startSlice(self, slice_hrn): """ Stop the slice at plc. """ cred = self.credential for hrn in self.aggregates.keys(): self.aggregates[hrn].startSlice(cred, slice_hrn) return 1 def stopSlice(self, slice_hrn): """ Stop the slice at plc """ cred = self.credential for hrn in self.aggregates.keys(): self.aggregates[hrn].startSlice(cred, slice_hrn) return 1 def resetSlice(self, slice_hrn): """ Reset the slice """ # XX not yet implemented return 1 def getPolicy(self): """ Return the policy of this slice manager. """ return self.policy ############################## ## Server methods here for now ############################## 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=None): self.decode_authentication(cred, 'listnodes') if not hrn: return self.getNodes() else: 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(cred, hrn, rspec) 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.delete_slice) self.server.register_function(self.start_slice) self.server.register_function(self.stop_slice) self.server.register_function(self.reset_slice)