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.trustedroot import * from geni.util.excep import * from geni.util.misc import * from geni.util.config import Config class SliceMgr(GeniServer): hrn = None key_file = None cert_file = None components_file = None slices_file = None components_ttl = None components = [] slices = [] policy = {} timestamp = None threshold = None shell = None aggregates = {} ## # 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/util/geni_config"): GeniServer.__init__(ip, port, key_file, cert_file) self.key_file = key_file self.cert_file = cert_file self.conf = Config(config) basedir = self.conf.GENI_BASE_DIR + os.sep server_basedir = basedir + os.sep + "plc" + os.sep self.hrn = conf.GENI_INTERFACE_HRN # Get list of aggregates this sm talks to aggregates_file = server_basedir + os.sep + 'aggregates' self.load_aggregates(aggregates_file) self.components_file = os.sep.join([server_basedir, 'components', 'slicemgr.' + hrn + '.comp']) self.slices_file = os.sep.join([server_basedir, 'components', 'slicemgr' + hrn + '.slices']) self.timestamp_file = os.sep.join([server_basedir, 'components', 'slicemgr' + hrn + '.timestamp']) self.components_ttl = components_ttl self.policy['whitelist'] = [] self.policy['blacklist'] = [] self.connect() def load_aggregates(self, aggregates_file): """ Get info about the aggregates available to us from file and create an xmlrpc connection to each. If any info is invalid, skip it. """ lines = [] try: f = open(aggregates_file, 'r') lines = f.readlines() f.close() except: raise for line in lines: # Skip comments if line.strip.startswith("#"): continue agg_info = line.split("\t").split(" ") # skip invalid info if len(agg_info) != 3: continue # create xmlrpc connection using GeniClient hrn, address, port = agg_info[0], agg_info[1], agg_info[2] url = 'https://%(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. """ print "refreshing" aggregates = self.aggregates.keys() all_nodes = [] all_slices = [] for aggregate in aggregates: try: # resolve components hostnames nodes = self.aggregates[aggregate].get_components() all_nodes.extend(nodes) # update timestamp and threshold self.timestamp = datetime.datetime.now() delta = datetime.timedelta(hours=self.components_ttl) self.threshold = self.timestamp + delta except: # XX print out to some error log pass self.components = all_nodes f = open(self.components_file, 'w') f.write(str(self.components)) f.close() f = open(self.timestamp_file, 'w') f.write(str(self.threshold)) f.close() def load_components(self): """ Read cached list of nodes and slices. """ print "loading nodes" # Read component list from cached file if os.path.exists(self.components_file): f = open(self.components_file, 'r') self.components = eval(f.read()) f.close() time_format = "%Y-%m-%d %H:%M:%S" if os.path.exists(self.timestamp_file): f = open(self.timestamp_file, 'r') timestamp = str(f.read()).split(".")[0] self.timestamp = datetime.datetime.fromtimestamp(time.mktime(time.strptime(timestamp, time_format))) delta = datetime.timedelta(hours=self.components_ttl) self.threshold = self.timestamp + delta f.close() def load_policy(self): """ Read the list of blacklisted and whitelisted nodes. """ whitelist = [] blacklist = [] if os.path.exists(self.whitelist_file): f = open(self.whitelist_file, 'r') lines = f.readlines() f.close() for line in lines: line = line.strip().replace(" ", "").replace("\n", "") whitelist.extend(line.split(",")) if os.path.exists(self.blacklist_file): f = open(self.blacklist_file, 'r') lines = f.readlines() f.close() for line in lines: line = line.strip().replace(" ", "").replace("\n", "") blacklist.extend(line.split(",")) self.policy['whitelist'] = whitelist self.policy['blacklist'] = blacklist def load_slices(self): """ Read current slice instantiation states. """ print "loading slices" if os.path.exists(self.slices_file): f = open(self.components_file, 'r') self.slices = eval(f.read()) f.close() def write_slices(self): """ Write current slice instantiations to file. """ print "writing slices" f = open(self.slices_file, 'w') f.write(str(self.slices)) f.close() def get_components(self): """ Return a list of components managed by this slice manager. """ # Reload components list now = datetime.datetime.now() #self.load_components() if not self.threshold or not self.timestamp or now > self.threshold: self.refresh_components() elif now < self.threshold and not self.components: self.load_components() return self.components def get_slices(self): """ Return a list of instnatiated managed by this slice manager. """ now = datetime.datetime.now() #self.load_components() if not self.threshold or not self.timestamp or now > self.threshold: self.refresh_components() elif now < self.threshold and not self.slices: self.load_components() return self.slices def get_slivers(self, hrn): """ Return the list of slices instantiated at the specified component. """ # hrn is assumed to be a component hrn if hrn not in self.slices: raise RecordNotFound(hrn) return self.slices[hrn] def get_rspec(self, hrn, type): #rspec = Rspec() if type in ['node']: nodes = self.shell.GetNodes(self.auth) elif type in ['slice']: slices = self.shell.GetSlices(self.auth) elif type in ['aggregate']: pass def get_resources(self, slice_hrn): """ Return the current rspec for the specified slice. """ slicename = hrn_to_plcslicename(slice_hrn) rspec = self.get_rspec(slicenamem, 'slice' ) return rspec def create_slice(self, slice_hrn, rspec, attributes): """ Instantiate the specified slice according to whats defined in the rspec. """ slicename = self.hrn_to_plcslicename(slice_hrn) #spec = Rspec(rspec) node_hrns = [] #for netspec in spec['networks]: # networkname = netspec['name'] # nodespec = spec['networks']['nodes'] # nodes = [nspec['name'] for nspec in nodespec] # node_hrns = [networkname + node for node in nodes] # self.db.AddSliceToNodes(slice_hrn, node_hrns) return 1 def delete_slice_(self, slice_hrn): """ Remove this slice from all components it was previouly associated with and free up the resources it was using. """ self.db.DeleteSliceFromNodes(self.auth, slicename, self.components) return 1 def start_slice(self, slice_hrn): """ Stop the slice at plc. """ slicename = hrn_to_plcslicename(slice_hrn) slices = self.shell.GetSlices(self.auth, {'name': slicename}, ['slice_id']) if not slices: raise RecordNotFound(slice_hrn) 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 stop_slice(self, slice_hrn): """ Stop the slice at plc """ slicename = hrn_to_plcslicename(slice_hrn) slices = self.shell.GetSlices(self.auth, {'name': slicename}, ['slice_id']) if not slices: raise RecordNotFound(slice_hrn) 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 reset_slice(self, slice_hrn): """ Reset the slice """ slicename = self.hrn_to_plcslicename(slice_hrn) return 1 def get_policy(self): """ Return the policy of this slice manager. """ return self.policy ############################## ## Server methods here for now ############################## def nodes(self): return self.get_components() def slices(self): return self.get_slices() def resources(self, cred, hrn): self.decode_authentication(cred, 'info') self.verify_object_belongs_to_me(hrn) return self.get_resources(hrn) def create(self, cred, hrn, rspec): self.decode_authentication(cred, 'embed') self.verify_object_belongs_to_me(hrn, rspec) return self.create(hrn) def delete(self, cred, hrn): self.decode_authentication(cred, 'embed') self.verify_object_belongs_to_me(hrn) return self.delete_slice(hrn) def start(self, cred, hrn): self.decode_authentication(cred, 'control') return self.start(hrn) def stop(self, cred, hrn): self.decode_authentication(cred, 'control') return self.stop(hrn) def reset(self, cred, hrn): self.decode_authentication(cred, 'control') return self.reset(hrn) def policy(self, cred): self.decode_authentication(cred, 'info') return self.get_policy() def register_functions(self): GeniServer.register_functions(self) # Aggregate interface methods self.server.register_function(self.components) self.server.register_function(self.slices) self.server.register_function(self.resources) self.server.register_function(self.create) self.server.register_function(self.delete) self.server.register_function(self.start) self.server.register_function(self.stop) self.server.register_function(self.reset) self.server.register_function(self.policy)