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
24 logger = Logger(level=logging.INFO)
26 class StepNotReady(Exception):
29 def toposort(g, steps=None):
34 values=values | set(v)
36 steps=list(keys|values)
48 if not reverse.has_key(k):
52 for k,v in reverse.iteritems():
72 order.extend(set(steps)-set(order))
79 class PlanetStackObserver:
80 #sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,SyncRoles,SyncNodes,SyncImages,GarbageCollector]
84 # The Condition object that gets signalled by Feefie events
86 self.load_sync_step_modules()
87 self.load_sync_steps()
88 self.event_cond = threading.Condition()
91 self.driver_kind = getattr(Config(), "observer_driver", "openstack")
92 if self.driver_kind=="openstack":
93 self.driver = OpenStackDriver()
95 self.driver = NoOpDriver()
97 def wait_for_event(self, timeout):
98 self.event_cond.acquire()
99 self.event_cond.wait(timeout)
100 self.event_cond.release()
103 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
104 self.event_cond.acquire()
105 self.event_cond.notify()
106 self.event_cond.release()
108 def load_sync_step_modules(self, step_dir=None):
110 if hasattr(Config(), "observer_steps_dir"):
111 step_dir = Config().observer_steps_dir
113 step_dir = "/opt/planetstack/observer/steps"
115 for fn in os.listdir(step_dir):
116 pathname = os.path.join(step_dir,fn)
117 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
118 module = imp.load_source(fn[:-3],pathname)
119 for classname in dir(module):
120 c = getattr(module, classname, None)
122 # make sure 'c' is a descendent of SyncStep and has a
123 # provides field (this eliminates the abstract base classes
124 # since they don't have a provides)
126 if inspect.isclass(c) and issubclass(c, SyncStep) and hasattr(c,"provides") and (c not in self.sync_steps):
127 self.sync_steps.append(c)
128 logger.info('loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps]))
129 # print 'loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps])
131 def load_sync_steps(self):
132 dep_path = Config().observer_dependency_graph
133 logger.info('Loading model dependency graph from %s' % dep_path)
135 # This contains dependencies between records, not sync steps
136 self.model_dependency_graph = json.loads(open(dep_path).read())
141 backend_path = Config().observer_pl_dependency_graph
142 logger.info('Loading backend dependency graph from %s' % backend_path)
143 # This contains dependencies between backend records
144 self.backend_dependency_graph = json.loads(open(backend_path).read())
146 logger.info('Backend dependency graph not loaded')
147 # We can work without a backend graph
148 self.backend_dependency_graph = {}
151 for s in self.sync_steps:
152 self.step_lookup[s.__name__] = s
155 provides_dict[m.__name__].append(s.__name__)
157 provides_dict[m.__name__]=[s.__name__]
161 for k,v in self.model_dependency_graph.iteritems():
163 for source in provides_dict[k]:
166 for dest in provides_dict[m]:
169 step_graph[source].append(dest)
171 step_graph[source]=[dest]
177 # no dependencies, pass
181 if (self.backend_dependency_graph):
183 for s in self.sync_steps:
185 backend_dict[m]=s.__name__
187 for k,v in backend_dependency_graph.iteritems():
189 source = backend_dict[k]
192 dest = backend_dict[m]
196 step_graph[source]=dest
200 # no dependencies, pass
202 dependency_graph = step_graph
204 self.ordered_steps = toposort(dependency_graph, map(lambda s:s.__name__,self.sync_steps))
205 print "Order of steps=",self.ordered_steps
206 self.load_run_times()
209 def check_duration(self, step, duration):
211 if (duration > step.deadline):
212 logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
213 except AttributeError:
214 # S doesn't have a deadline
217 def update_run_time(self, step):
218 self.last_run_times[step.__name__]=time.time()
220 def check_schedule(self, step):
221 time_since_last_run = time.time() - self.last_run_times.get(step.__name__, 0)
223 if (time_since_last_run < step.requested_interval):
225 except AttributeError:
226 logger.info('Step %s does not have requested_interval set'%step.__name__)
229 def load_run_times(self):
231 jrun_times = open('/tmp/observer_run_times').read()
232 self.last_run_times = json.loads(jrun_times)
234 self.last_run_times={}
235 for e in self.ordered_steps:
236 self.last_run_times[e]=0
239 def save_run_times(self):
240 run_times = json.dumps(self.last_run_times)
241 open('/tmp/observer_run_times','w').write(run_times)
243 def check_class_dependency(self, step, failed_steps):
244 step.dependenices = []
245 for obj in step.provides:
246 step.dependenices.extend(self.model_dependency_graph.get(obj.__name__, []))
247 for failed_step in failed_steps:
248 if (failed_step in step.dependencies):
252 if not self.driver.enabled:
254 if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
259 logger.info('Waiting for event')
260 tBeforeWait = time.time()
261 self.wait_for_event(timeout=30)
262 logger.info('Observer woke up')
264 # Set of whole steps that failed
267 # Set of individual objects within steps that failed
268 failed_step_objects = set()
270 for S in self.ordered_steps:
271 step = self.step_lookup[S]
272 start_time=time.time()
274 sync_step = step(driver=self.driver)
275 sync_step.__name__ = step.__name__
276 sync_step.dependencies = []
278 mlist = sync_step.provides
281 sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
284 sync_step.debug_mode = debug_mode
288 # Various checks that decide whether
289 # this step runs or not
290 self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
291 self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
294 logging.info('Step not ready: %s'%sync_step.__name__)
295 failed_steps.append(sync_step)
297 failed_steps.append(sync_step)
301 duration=time.time() - start_time
303 logger.info('Executing step %s' % sync_step.__name__)
305 # ********* This is the actual sync step
308 failed_objects = sync_step(failed=list(failed_step_objects))
311 self.check_duration(sync_step, duration)
313 failed_step_objects.update(failed_objects)
314 self.update_run_time(sync_step)
316 failed_steps.append(S)
317 self.save_run_times()
319 logger.log_exc("Exception in observer run loop")
320 traceback.print_exc()