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 Config from geni.util.rspec import Rspec from geni.util.specdict import * from geni.util.storage import SimpleStorage 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__(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 + "geni" + os.sep self.hrn = conf.GENI_INTERFACE_HRN # Get list of aggregates this sm talks to # XX do we use simplestorage to maintain this file manually? aggregates_file = server_basedir + os.sep + 'aggregates' self.aggregates = SimpleStorage(aggregates_file) self.connect_aggregates(aggregates_file) nodes_file = os.sep.join([server_basedir, 'smgr.' + self.hrn + '.components']) self.nodes = SimpleStorage(nodes_file) self.nodes.load() slices_file = os.sep.join([server_basedir, 'smgr' + self.hrn + '.slices']) self.slices = SimpleStorage(slices_file) self.slices.load() policy_file = os.sep.join([server_basedir, 'smgr.' + self.hrn + '.policy']) self.policy = SimpleStorage(policy_file) self.policy.load() timestamp_file = os.sep.join([server_basedir, 'smgr.' + self.hrn + '.timestamp']) self.timestamp = SimpleStorage(timestamp_file) self.nodes_ttl = 1 self.connectAggregates() self.connectRegistry() self.loadCredential() 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 + "smgr." + self.hrn + ".cred" ma_cred_filename = self.server_basedir + os.sep + "smgr." + self.hrn + ".sa.cred" # see if this file exists try: cred = Credential(filename = ma_cred_filename) 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_gredential(self_cred) ma_credential = Credential(string = ma_cred) ma_credential.save_to_file(ma_cred_filename) self.credential = ma_cred def connect_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 = [] nodedict = {} for aggregate in aggregates: try: # resolve components hostnames nodes = self.aggregates[aggregate].get_components() all_nodes.extend(nodes) except: # XX print out to some error log pass for node in all_nodes: if self.polciy['whitelist'] and node not in self.polciy['whitelist']: continue if self.polciy['blacklist'] and node in self.policy['blacklist']: continue nodedict[node] = node self.nodes = SimpleStorate(self.nodes.db_filename, nodedict) self.nodes.write() # update timestamp and threshold self.timestamp['timestamp'] = datetime.datetime.now() delta = datetime.timedelta(hours=self.nodes_tt1) self.threshold = self.timestamp['timestamp'] + delta self.timestamp.write() def load_components(self): """ Read cached list of nodes and slices. """ print "loading 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 load_slices(self): """ Read current slice instantiation states. """ print "loading slices" self.slices.load() def getComponents(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.nodes.keys() def getSlices(self): """ Return a list of instnatiated managed by this slice manager. """ # XX return only the slices at the specified hrn return dict(self.slices) def getResources(self, slice_hrn): """ Return the current rspec for the specified slice. """ cred = self.credential if slice_hrn in self.slices.keys(): # check if we alreay have this slices state saved rspec = self.slices[slice_hrn] else: # request this slices state from all known aggregates rspecdicts = [] for hrn in self.aggregates.keys(): # XX need to use the right credentials for this call # check if the slice has resources at this hrn tempresources = self.aggregates[hrn].resources(cred, slice_hrn) temprspec = Rspec() temprspec.parseString(temprspec) if temprspec.getDictsByTagName('NodeSpec'): # append this rspec to the list of rspecs rspecdicts.append(temprspec.toDict()) # merge all these rspecs into one start_time = int(self.timestamp['timestamp'].strftime("%s")) end_time = int(self.duration.strftime("%s")) duration = end_time - start_time # create a plc dict networks = [rspecdict['networks'][0] for rspecdict in rspecdicts] resources = {'networks': networks, 'start_time': start_time, 'duration': duration} # convert the plc dict to an rspec dict resourceDict = RspecDict(resources) resourceSpec = Rspec() resourceSpec.parseDict(resourceDict) rspec = resourceSpec.toxml() # save this slices resources self.slices[slice_hrn] = rspec self.slices.write() return rspec def createSlice(self, slice_hrn, rspec, attributes): """ Instantiate the specified slice according to whats defined in the rspec. """ # XX need to gget the correct credentials cred = self.credential # 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() # extract network list from the rspec and create a separate # rspec for each network slicename = self.hrn_to_plcslicename(slice_hrn) spec = Rspec() spec.parseString(rspec) specDict = spec.toDict() start_time = specDict['start_time'] end_time = specDict['end_time'] 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 tempdict = {'start_time': star_time, 'end_time': end_time, 'networks': netspec} #convert the plc dict to rpsec dict resourceDict = RspecDict(tempdict) # parse rspec dict tempspec = Rspec() tempspec.parseDict(resourceDict) rspecs[hrn] = tempspec.toxml() # notify the aggregates for hrn in self.rspecs.keys(): self.aggregates[hrn].createSlice(cred, 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_components(self): return self.getComponents() def list_slices(self, cred, hrn): self.decode_authentication(cred, 'list') return self.getSlices(hrn) def get_resources(self, cred, hrn): self.decode_authentication(cred, 'info') return self.getResources(hrn) def get_policy(self, cred): self.decode_authentication(cred, 'info') return self.getPolicy() def create_slice(self, cred, hrn, rspec): self.decode_authentication(cred, 'embed') return self.createSlice(hrn) def delete_slice(self, cred, hrn): self.decode_authentication(cred, 'embed') return self.deleteSlice(hrn) def start_slice(self, cred, hrn): self.decode_authentication(cred, 'control') return self.startSlice(hrn) def stop_slice(self, cred, hrn): self.decode_authentication(cred, 'control') return self.stopSlice(hrn) def reset_slice(self, cred, hrn): self.decode_authentication(cred, 'control') return self.resetSlice(hrn) def register_functions(self): GeniServer.register_functions(self) # Aggregate interface methods self.server.register_function(self.list_components) 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)