### $Id$ ### $URL$ import datetime import time import traceback import sys from types import StringTypes from sfa.util.misc import * from sfa.util.rspec import * from sfa.util.specdict import * from sfa.util.faults import * from sfa.util.storage import * from sfa.util.policy import Policy from sfa.util.debug import log from sfa.server.aggregate import Aggregates from sfa.server.registry import Registries class Slices(SimpleStorage): def __init__(self, api, ttl = .5, caller_cred=None): self.api = api self.ttl = ttl self.threshold = None path = self.api.config.SFA_BASE_DIR filename = ".".join([self.api.interface, self.api.hrn, "slices"]) filepath = path + os.sep + filename self.slices_file = filepath SimpleStorage.__init__(self, self.slices_file) self.policy = Policy(self.api) self.load() self.caller_cred=caller_cred def get_peer(self, hrn): # Becaues of myplc federation, we first need to determine if this # slice belongs to out local plc or a myplc peer. We will assume it # is a local site, unless we find out otherwise peer = None # get this slice's authority (site) slice_authority = get_authority(hrn) # get this site's authority (sfa root authority or sub authority) site_authority = get_authority(slice_authority).lower() # check if we are already peered with this site_authority, if so peers = self.api.plshell.GetPeers(self.api.plauth, {}, ['peer_id', 'peername', 'shortname', 'hrn_root']) for peer_record in peers: names = [name.lower() for name in peer_record.values() if isinstance(name, StringTypes)] if site_authority in names: peer = peer_record['shortname'] return peer def refresh(self): """ Update the cached list of slices """ # Reload components list now = datetime.datetime.now() if not self.has_key('threshold') or not self.has_key('timestamp') or \ now > datetime.datetime.fromtimestamp(time.mktime(time.strptime(self['threshold'], self.api.time_format))): if self.api.interface in ['aggregate']: self.refresh_slices_aggregate() elif self.api.interface in ['slicemgr']: self.refresh_slices_smgr() def refresh_slices_aggregate(self): slices = self.api.plshell.GetSlices(self.api.plauth, {'peer_id': None}, ['name']) slice_hrns = [slicename_to_hrn(self.api.hrn, slice['name']) for slice in slices] # update timestamp and threshold timestamp = datetime.datetime.now() hr_timestamp = timestamp.strftime(self.api.time_format) delta = datetime.timedelta(hours=self.ttl) threshold = timestamp + delta hr_threshold = threshold.strftime(self.api.time_format) slice_details = {'hrn': slice_hrns, 'timestamp': hr_timestamp, 'threshold': hr_threshold } self.update(slice_details) self.write() def refresh_slices_smgr(self): slice_hrns = [] aggregates = Aggregates(self.api) credential = self.api.getCredential() for aggregate in aggregates: try: slices = aggregates[aggregate].get_slices(credential) slice_hrns.extend(slices) except: print >> log, "Error calling slices at aggregate %(aggregate)s" % locals() # update timestamp and threshold timestamp = datetime.datetime.now() hr_timestamp = timestamp.strftime(self.api.time_format) delta = datetime.timedelta(hours=self.ttl) threshold = timestamp + delta hr_threshold = threshold.strftime(self.api.time_format) slice_details = {'hrn': slice_hrns, 'timestamp': hr_timestamp, 'threshold': hr_threshold } self.update(slice_details) self.write() def delete_slice(self, hrn): if self.api.interface in ['aggregate']: self.delete_slice_aggregate(hrn) elif self.api.interface in ['slicemgr']: self.delete_slice_smgr(hrn) def delete_slice_aggregate(self, hrn): slicename = hrn_to_pl_slicename(hrn) slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}) if not slices: return 1 slice = slices[0] # determine if this is a peer slice peer = self.get_peer(hrn) if peer: self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'slice', slice['slice_id'], peer) self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, slice['node_ids']) if peer: self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice['slice_id'], peer, slice['peer_slice_id']) return 1 def delete_slice_smgr(self, hrn): credential = self.api.getCredential() aggregates = Aggregates(self.api) for aggregate in aggregates: try: aggregates[aggregate].delete_slice(credential, hrn, caller_cred=self.caller_cred) except: print >> log, "Error calling list nodes at aggregate %s" % aggregate traceback.print_exc(log) exc_type, exc_value, exc_traceback = sys.exc_info() print exc_type, exc_value, exc_traceback def create_slice(self, hrn, rspec): # check our slice policy before we procede whitelist = self.policy['slice_whitelist'] blacklist = self.policy['slice_blacklist'] if whitelist and hrn not in whitelist or \ blacklist and hrn in blacklist: policy_file = self.policy.policy_file print >> log, "Slice %(hrn)s not allowed by policy %(policy_file)s" % locals() return 1 if self.api.interface in ['aggregate']: self.create_slice_aggregate(hrn, rspec) elif self.api.interface in ['slicemgr']: self.create_slice_smgr(hrn, rspec) def create_slice_aggregate(self, hrn, rspec): # Determine if this is a peer slice peer = self.get_peer(hrn) spec = Rspec(rspec) # Get the slice record from sfa slice = {} slice_record = None registries = Registries(self.api) registry = registries[self.api.hrn] credential = self.api.getCredential() slice_records = registry.resolve(credential, hrn) for record in slice_records: if record.get_type() in ['slice']: slice_record = record.as_dict() if not slice_record: raise RecordNotFound(hrn) # Get the slice's site record authority = get_authority(hrn) site_records = registry.resolve(credential, get_authority(hrn)) site = {} for site_record in site_records: if site_record.get_type() in ['authority']: site = site_record.as_dict() if not site: raise RecordNotFound(hrn) remote_site_id = site.pop('site_id') # Make sure slice exists at plc, if it doesnt add it slicename = hrn_to_pl_slicename(hrn) slices = self.api.plshell.GetSlices(self.api.plauth, [slicename], ['slice_id', 'node_ids', 'site_id'] ) parts = slicename.split("_") login_base = parts[0] # if site doesnt exist add it sites = self.api.plshell.GetSites(self.api.plauth, [login_base]) if not slices: if not sites: # add the site site_id = self.api.plshell.AddSite(self.api.plauth, site) # this belongs to a peer if peer: self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', site_id, peer, remote_site_id) else: site_id = sites[0]['site_id'] remote_site_id = sites[0]['peer_site_id'] # create slice object slice_fields = {} slice_keys = ['name', 'url', 'description'] for key in slice_keys: if key in slice_record and slice_record[key]: slice_fields[key] = slice_record[key] # add the slice slice_id = self.api.plshell.AddSlice(self.api.plauth, slice_fields) slice = slice_fields #this belongs to a peer if peer: self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice_id, peer, slice_record['pointer']) slice['node_ids'] = [] else: slice = slices[0] slice_id = slice['slice_id'] site_id = slice['site_id'] remote_site_id = sites[0]['peer_site_id'] # get the list of valid slice users from the registry and make # they are added to the slice researchers = record.get('researcher', []) for researcher in researchers: person_record = {} person_records = registry.resolve(credential, researcher) for record in person_records: if record.get_type() in ['user']: person_record = record if not person_record: pass person_dict = person_record.as_dict() persons = self.api.plshell.GetPersons(self.api.plauth, [person_dict['email']], ['person_id', 'key_ids']) # Create the person record if not persons: person_id=self.api.plshell.AddPerson(self.api.plauth, person_dict) # The line below enables the user account on the remote # aggregate soon after it is created. without this the # user key is not transfered to the slice (as GetSlivers # returns key of only enabled users), which prevents the # user from login to the slice. We may do additional checks # before enabling the user. self.api.plshell.UpdatePerson(self.api.plauth, person_id, {'enabled' : True}) if peer: self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer']) key_ids = [] else: person_id = persons[0]['person_id'] key_ids = persons[0]['key_ids'] # if this is a peer person, we must unbind them from the peer or PLCAPI will throw # an error if peer: self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'person', person_id, peer) self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'site', site_id, peer) self.api.plshell.AddPersonToSlice(self.api.plauth, person_dict['email'], slicename) self.api.plshell.AddPersonToSite(self.api.plauth, person_dict['email'], site_id) if peer: self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer']) self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', site_id, peer, remote_site_id) # Get this users local keys keylist = self.api.plshell.GetKeys(self.api.plauth, key_ids, ['key']) keys = [key['key'] for key in keylist] # add keys that arent already there key_ids=person_dict['key_ids'] for personkey in person_dict['keys']: if personkey not in keys: key = {'key_type': 'ssh', 'key': personkey} if peer: self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'person', person_id, peer) key_id=self.api.plshell.AddPersonKey(self.api.plauth, person_dict['email'], key) if peer: self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer']) self.api.plshell.BindObjectToPeer(self.api.plauth, 'key', key_id, peer, key_ids.pop(0)) # find out where this slice is currently running nodelist = self.api.plshell.GetNodes(self.api.plauth, slice['node_ids'], ['hostname']) hostnames = [node['hostname'] for node in nodelist] # get netspec details nodespecs = spec.getDictsByTagName('NodeSpec') nodes = [] for nodespec in nodespecs: if isinstance(nodespec['name'], list): nodes.extend(nodespec['name']) elif isinstance(nodespec['name'], StringTypes): nodes.append(nodespec['name']) # remove nodes not in rspec deleted_nodes = list(set(hostnames).difference(nodes)) # add nodes from rspec added_nodes = list(set(nodes).difference(hostnames)) if peer: self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'slice', slice_id, peer) self.api.plshell.AddSliceToNodes(self.api.plauth, slicename, added_nodes) self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, deleted_nodes) if peer: self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice_id, peer, slice_record['pointer']) return 1 def create_slice_smgr(self, hrn, rspec): spec = Rspec() tempspec = Rspec() spec.parseString(rspec) slicename = hrn_to_pl_slicename(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 = {} aggregates = Aggregates(self.api) credential = self.api.getCredential() # only attempt to extract information about the aggregates we know about for aggregate in aggregates: netspec = spec.getDictByTagNameValue('NetSpec', aggregate) if netspec: # creat a plc dict resources = {'start_time': start_time, 'end_time': end_time, 'networks': netspec} resourceDict = {'Rspec': resources} tempspec.parseDict(resourceDict) rspecs[aggregate] = tempspec.toxml() # notify the aggregates for aggregate in rspecs.keys(): try: # send the whloe rspec to the local aggregate if aggregate in [self.api.hrn]: aggregates[aggregate].create_slice(credential, hrn, rspec, caller_cred=self.caller_cred) else: aggregates[aggregate].create_slice(credential, hrn, rspecs[aggregate], caller_cred=self.caller_cred) except: print >> log, "Error creating slice %(hrn)s at aggregate %(aggregate)s" % locals() traceback.print_exc() return 1 def start_slice(self, hrn): if self.api.interface in ['aggregate']: self.start_slice_aggregate(hrn) elif self.api.interface in ['slicemgr']: self.start_slice_smgr(hrn) def start_slice_aggregate(self, hrn): slicename = hrn_to_pl_slicename(hrn) slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id']) if not slices: raise RecordNotFound(hrn) slice_id = slices[0] attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id']) attribute_id = attreibutes[0]['slice_attribute_id'] self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "1" ) return 1 def start_slice_smgr(self, hrn): credential = self.api.getCredential() aggregates = Aggregates(self.api) for aggregate in aggregates: aggregates[aggregate].start_slice(credential, hrn) return 1 def stop_slice(self, hrn): if self.api.interface in ['aggregate']: self.stop_slice_aggregate(hrn) elif self.api.interface in ['slicemgr']: self.stop_slice_smgr(hrn) def stop_slice_aggregate(self, hrn): slicename = hrn_to_pl_slicename(hrn) slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id']) if not slices: raise RecordNotFound(hrn) slice_id = slices[0]['slice_id'] attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id']) attribute_id = attributes[0]['slice_attribute_id'] self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "0") return 1 def stop_slice_smgr(self, hrn): credential = self.api.getCredential() aggregates = Aggregates(self.api) for aggregate in aggregates: aggregates[aggregate].stop_slice(credential, hrn)