7 from datetime import datetime
8 from collections import defaultdict
9 from core.models import *
10 from django.db.models import F, Q
11 #from openstack.manager import OpenStackManager
12 from openstack.driver import OpenStackDriver
13 from util.logger import Logger, logging, logger
14 #from timeout import timeout
15 from planetstack.config import Config
16 from observer.steps import *
20 logger = Logger(logfile='observer.log', level=logging.INFO)
22 class StepNotReady(Exception):
25 def toposort(g, steps):
37 if not reverse.has_key(k):
41 for k,v in reverse.iteritems():
60 class PlanetStackObserver:
61 sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,GarbageCollector]
64 # The Condition object that gets signalled by Feefie events
66 self.load_sync_steps()
67 self.event_cond = threading.Condition()
68 self.driver = OpenStackDriver()
70 def wait_for_event(self, timeout):
71 self.event_cond.acquire()
72 self.event_cond.wait(timeout)
73 self.event_cond.release()
76 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
77 self.event_cond.acquire()
78 self.event_cond.notify()
79 self.event_cond.release()
81 def load_sync_steps(self):
82 dep_path = Config().observer_backend_dependency_graph
84 # This contains dependencies between records, not sync steps
85 self.model_dependency_graph = json.loads(open(dep_path).read())
90 backend_path = Config().observer_pl_dependency_graph
91 # This contains dependencies between backend records
92 self.backend_dependency_graph = json.loads(open(backend_path).read())
94 # We can work without a backend graph
95 self.backend_dependency_graph = {}
98 for s in self.sync_steps:
99 self.step_lookup[s.__name__] = s
102 provides_dict[m.__name__].append(s.__name__)
104 provides_dict[m.__name__]=[s.__name__]
108 for k,v in self.model_dependency_graph.iteritems():
110 for source in provides_dict[k]:
113 for dest in provides_dict[m]:
116 step_graph[source].append(dest)
118 step_graph[source]=[dest]
124 # no dependencies, pass
128 if (self.backend_dependency_graph):
130 for s in self.sync_steps:
132 backend_dict[m]=s.__name__
134 for k,v in backend_dependency_graph.iteritems():
136 source = backend_dict[k]
139 dest = backend_dict[m]
143 step_graph[source]=dest
147 # no dependencies, pass
149 dependency_graph = step_graph
151 self.ordered_steps = toposort(dependency_graph, self.sync_steps)
152 print "Order of steps=",self.ordered_steps
153 self.load_run_times()
156 def check_duration(self):
158 if (duration > S.deadline):
159 logger.info('Sync step %s missed deadline, took %.2f seconds'%(S.name,duration))
160 except AttributeError:
161 # S doesn't have a deadline
164 def update_run_time(self, step):
165 self.last_run_times[step.name]=time.time()
167 def check_schedule(self, step):
168 time_since_last_run = time.time() - self.last_run_times[step.__name__]
170 if (time_since_last_run < step.requested_interval):
172 except AttributeError:
173 logger.info('Step %s does not have requested_interval set'%step.__name__)
176 def load_run_times(self):
178 jrun_times = open('/tmp/observer_run_times').read()
179 self.last_run_times = json.loads(jrun_times)
181 self.last_run_times={}
182 for e in self.ordered_steps:
183 self.last_run_times[e]=0
187 def save_run_times(self):
188 run_times = json.dumps(self.last_run_times)
189 open('/tmp/observer_run_times','w').write(run_times)
191 def check_class_dependency(self, step, failed_steps):
192 for failed_step in failed_steps:
193 dependencies = self.model_dependency_graph.get(step.provides[0].__name__, [])
194 if (failed_step in dependencies):
198 if not self.driver.enabled or not self.driver.has_openstack:
203 logger.info('Waiting for event')
204 tBeforeWait = time.time()
205 self.wait_for_event(timeout=300)
206 logger.info('Observer woke up')
208 # Set of whole steps that failed
211 # Set of individual objects within steps that failed
212 failed_step_objects = []
214 for S in self.ordered_steps:
215 step = self.step_lookup[S]
216 start_time=time.time()
218 sync_step = step(driver=self.driver)
219 sync_step.__name__ = step.__name__
220 #sync_step.dependencies = self.dependencies[sync_step.name]
221 sync_step.debug_mode = debug_mode
225 # Various checks that decide whether
226 # this step runs or not
227 self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
228 self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
231 logging.info('Step not ready: %s'%sync_step.name)
232 failed_steps.append(sync_step)
234 failed_steps.append(sync_step)
238 duration=time.time() - start_time
240 # ********* This is the actual sync step
241 failed_objects = sync_step(failed=failed_step_objects)
244 check_deadline(sync_step, duration)
245 failed_step_objects.extend(failed_objects)
246 self.update_run_time(sync_step)
248 failed_steps.append(S)
249 self.save_run_times()
251 logger.log_exc("Exception in observer run loop")
252 traceback.print_exc()