10 from datetime import datetime
11 from collections import defaultdict
12 from core.models import *
13 from django.db.models import F, Q
14 #from openstack.manager import OpenStackManager
15 from openstack.driver import OpenStackDriver
16 from util.logger import Logger, logging, logger
17 #from timeout import timeout
18 from planetstack.config import Config
19 from observer.steps import *
20 from syncstep import SyncStep
21 from toposort import toposort
22 from observer.error_mapper import *
26 logger = Logger(level=logging.INFO)
28 class StepNotReady(Exception):
34 self.dependency_graph = None
50 class PlanetStackObserver:
51 #sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,SyncRoles,SyncNodes,SyncImages,GarbageCollector]
56 # The Condition object that gets signalled by Feefie events
58 self.load_sync_step_modules()
59 self.load_sync_steps()
60 self.event_cond = threading.Condition()
62 self.driver_kind = getattr(Config(), "observer_driver", "openstack")
63 if self.driver_kind=="openstack":
64 self.driver = OpenStackDriver()
66 self.driver = NoOpDriver()
68 def wait_for_event(self, timeout):
69 self.event_cond.acquire()
70 self.event_cond.wait(timeout)
71 self.event_cond.release()
74 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
75 self.event_cond.acquire()
76 self.event_cond.notify()
77 self.event_cond.release()
79 def load_sync_step_modules(self, step_dir=None):
81 if hasattr(Config(), "observer_steps_dir"):
82 step_dir = Config().observer_steps_dir
84 step_dir = "/opt/planetstack/observer/steps"
86 for fn in os.listdir(step_dir):
87 pathname = os.path.join(step_dir,fn)
88 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
89 module = imp.load_source(fn[:-3],pathname)
90 for classname in dir(module):
91 c = getattr(module, classname, None)
93 # make sure 'c' is a descendent of SyncStep and has a
94 # provides field (this eliminates the abstract base classes
95 # since they don't have a provides)
97 if inspect.isclass(c) and issubclass(c, SyncStep) and hasattr(c,"provides") and (c not in self.sync_steps):
98 self.sync_steps.append(c)
99 logger.info('loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps]))
100 # print 'loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps])
102 def load_sync_steps(self):
103 dep_path = Config().observer_dependency_graph
104 logger.info('Loading model dependency graph from %s' % dep_path)
106 # This contains dependencies between records, not sync steps
107 self.model_dependency_graph = json.loads(open(dep_path).read())
112 backend_path = Config().observer_pl_dependency_graph
113 logger.info('Loading backend dependency graph from %s' % backend_path)
114 # This contains dependencies between backend records
115 self.backend_dependency_graph = json.loads(open(backend_path).read())
117 logger.info('Backend dependency graph not loaded')
118 # We can work without a backend graph
119 self.backend_dependency_graph = {}
122 for s in self.sync_steps:
123 self.step_lookup[s.__name__] = s
126 provides_dict[m.__name__].append(s.__name__)
128 provides_dict[m.__name__]=[s.__name__]
131 for k,v in self.model_dependency_graph.iteritems():
133 for source in provides_dict[k]:
136 for dest in provides_dict[m]:
139 if (dest not in step_graph[source]):
140 step_graph[source].append(dest)
142 step_graph[source]=[dest]
148 # no dependencies, pass
152 if (self.backend_dependency_graph):
154 for s in self.sync_steps:
156 backend_dict[m]=s.__name__
158 for k,v in backend_dependency_graph.iteritems():
160 source = backend_dict[k]
163 dest = backend_dict[m]
167 step_graph[source]=dest
171 # no dependencies, pass
173 self.dependency_graph = step_graph
174 self.deletion_dependency_graph = invert_graph(step_graph)
176 self.ordered_steps = toposort(self.dependency_graph, map(lambda s:s.__name__,self.sync_steps))
177 print "Order of steps=",self.ordered_steps
178 self.load_run_times()
181 def check_duration(self, step, duration):
183 if (duration > step.deadline):
184 logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
185 except AttributeError:
186 # S doesn't have a deadline
189 def update_run_time(self, step, deletion):
191 self.last_run_times[step.__name__]=time.time()
193 self.last_deletion_run_times[step.__name__]=time.time()
196 def check_schedule(self, step, deletion):
197 last_run_times = self.last_run_times if not deletion else self.last_deletion_run_times
199 time_since_last_run = time.time() - last_run_times.get(step.__name__, 0)
201 if (time_since_last_run < step.requested_interval):
203 except AttributeError:
204 logger.info('Step %s does not have requested_interval set'%step.__name__)
207 def load_run_times(self):
209 jrun_times = open('/tmp/observer_run_times').read()
210 self.last_run_times = json.loads(jrun_times)
212 self.last_run_times={}
213 for e in self.ordered_steps:
214 self.last_run_times[e]=0
216 jrun_times = open('/tmp/observer_deletion_run_times').read()
217 self.last_deletion_run_times = json.loads(jrun_times)
219 self.last_deletion_run_times={}
220 for e in self.ordered_steps:
221 self.last_deletion_run_times[e]=0
225 def save_run_times(self):
226 run_times = json.dumps(self.last_run_times)
227 open('/tmp/observer_run_times','w').write(run_times)
229 deletion_run_times = json.dumps(self.last_deletion_run_times)
230 open('/tmp/observer_deletion_run_times','w').write(deletion_run_times)
232 def check_class_dependency(self, step, failed_steps):
233 step.dependenices = []
234 for obj in step.provides:
235 step.dependenices.extend(self.model_dependency_graph.get(obj.__name__, []))
236 for failed_step in failed_steps:
237 if (failed_step in step.dependencies):
240 def sync(self, S, deletion):
241 step = self.step_lookup[S]
242 start_time=time.time()
244 # Wait for step dependencies to be met
245 deps = self.dependency_graph[S]
247 cond = self.step_conditions[d]
249 if (self.step_status[S] is STEP_STATUS_WORKING):
253 if (self.step_status[S] is not STEP_STATUS_OK):
254 self.failed_steps.append(sync_step)
255 my_status = STEP_STATUS_KO
257 sync_step = step(driver=self.driver,error_map=error_mapper)
258 sync_step.__name__ = step.__name__
259 sync_step.dependencies = []
261 mlist = sync_step.provides
264 sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
267 sync_step.debug_mode = debug_mode
271 # Various checks that decide whether
272 # this step runs or not
273 self.check_class_dependency(sync_step, self.failed_steps) # dont run Slices if Sites failed
274 self.check_schedule(sync_step, deletion) # dont run sync_network_routes if time since last run < 1 hour
277 logging.info('Step not ready: %s'%sync_step.__name__)
278 self.failed_steps.append(sync_step)
279 my_status = STEP_STATUS_KO
281 logging.error('%r',e)
282 logger.log_exc("sync step failed: %r. Deletion: %r"%(sync_step,deletion))
283 self.failed_steps.append(sync_step)
284 my_status = STEP_STATUS_KO
288 duration=time.time() - start_time
290 logger.info('Executing step %s' % sync_step.__name__)
292 failed_objects = sync_step(failed=list(self.failed_step_objects), deletion=deletion)
294 self.check_duration(sync_step, duration)
297 self.failed_step_objects.update(failed_objects)
299 my_status = STEP_STATUS_OK
300 self.update_run_time(sync_step,deletion)
302 logging.error('Model step failed. This seems like a misconfiguration or bug: %r. This error will not be relayed to the user!',e)
304 self.failed_steps.append(S)
305 my_status = STEP_STATUS_KO
307 my_status = STEP_STATUS_OK
310 my_cond = self.step_conditions[S]
312 self.step_status[S]=my_status
316 logging.info('Step %r is a leaf')
320 if not self.driver.enabled:
323 if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
328 error_map_file = getattr(Config(), "error_map_path", "/opt/planetstack/error_map.txt")
329 self.error_mapper = ErrorMapper(error_map_file)
331 # Set of whole steps that failed
332 self.failed_steps = []
334 # Set of individual objects within steps that failed
335 self.failed_step_objects = set()
337 # Set up conditions and step status
338 # This is needed for steps to run in parallel
339 # while obeying dependencies.
342 for v in self.dependency_graph.values():
346 self.step_conditions = {}
347 self.step_status = {}
348 for p in list(providers):
349 self.step_conditions[p] = threading.Condition()
350 self.step_status[p] = STEP_STATUS_IDLE
353 logger.info('Waiting for event')
354 tBeforeWait = time.time()
355 self.wait_for_event(timeout=30)
356 logger.info('Observer woke up')
358 # Two passes. One for sync, the other for deletion.
359 for deletion in [False,True]:
361 logger.info('Deletion=%r...'%deletion)
362 schedule = self.ordered_steps if not deletion else reversed(self.ordered_steps)
364 thread = threading.Thread(target=self.sync, args=(schedule.start_conditions, schedule.ordered_steps,deletion, schedule.signal_sem))
366 logger.info('Deletion=%r...'%deletion)
367 threads.append(thread)
373 # Wait for all threads to finish before continuing with the run loop
377 self.save_run_times()
379 logging.error('Core error. This seems like a misconfiguration or bug: %r. This error will not be relayed to the user!',e)
380 logger.log_exc("Exception in observer run loop")
381 traceback.print_exc()