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=None):
30 values=values | set(v)
32 steps=list(keys|values)
44 if not reverse.has_key(k):
48 for k,v in reverse.iteritems():
67 order = rev_order.reverse()
68 order.extend(set(steps)-set(order))
71 class PlanetStackObserver:
72 sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,GarbageCollector]
75 # The Condition object that gets signalled by Feefie events
77 self.load_sync_steps()
78 self.event_cond = threading.Condition()
79 self.driver = OpenStackDriver()
81 def wait_for_event(self, timeout):
82 self.event_cond.acquire()
83 self.event_cond.wait(timeout)
84 self.event_cond.release()
87 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
88 self.event_cond.acquire()
89 self.event_cond.notify()
90 self.event_cond.release()
92 def load_sync_steps(self):
93 dep_path = Config().observer_backend_dependency_graph
95 # This contains dependencies between records, not sync steps
96 self.model_dependency_graph = json.loads(open(dep_path).read())
101 backend_path = Config().observer_pl_dependency_graph
102 # This contains dependencies between backend records
103 self.backend_dependency_graph = json.loads(open(backend_path).read())
105 # We can work without a backend graph
106 self.backend_dependency_graph = {}
109 for s in self.sync_steps:
110 self.step_lookup[s.__name__] = s
113 provides_dict[m.__name__].append(s.__name__)
115 provides_dict[m.__name__]=[s.__name__]
119 for k,v in self.model_dependency_graph.iteritems():
121 for source in provides_dict[k]:
124 for dest in provides_dict[m]:
127 step_graph[source].append(dest)
129 step_graph[source]=[dest]
135 # no dependencies, pass
139 if (self.backend_dependency_graph):
141 for s in self.sync_steps:
143 backend_dict[m]=s.__name__
145 for k,v in backend_dependency_graph.iteritems():
147 source = backend_dict[k]
150 dest = backend_dict[m]
154 step_graph[source]=dest
158 # no dependencies, pass
160 dependency_graph = step_graph
162 self.ordered_steps = toposort(dependency_graph, map(lambda s:s.__name__,self.sync_steps))
163 print "Order of steps=",self.ordered_steps
164 self.load_run_times()
167 def check_duration(self, step, duration):
169 if (duration > step.deadline):
170 logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
171 except AttributeError:
172 # S doesn't have a deadline
175 def update_run_time(self, step):
176 self.last_run_times[step.__name__]=time.time()
178 def check_schedule(self, step):
179 time_since_last_run = time.time() - self.last_run_times[step.__name__]
181 if (time_since_last_run < step.requested_interval):
183 except AttributeError:
184 logger.info('Step %s does not have requested_interval set'%step.__name__)
187 def load_run_times(self):
189 jrun_times = open('/tmp/observer_run_times').read()
190 self.last_run_times = json.loads(jrun_times)
192 self.last_run_times={}
193 for e in self.ordered_steps:
194 self.last_run_times[e]=0
198 def save_run_times(self):
199 run_times = json.dumps(self.last_run_times)
200 open('/tmp/observer_run_times','w').write(run_times)
202 def check_class_dependency(self, step, failed_steps):
203 for failed_step in failed_steps:
204 step.dependencies = self.model_dependency_graph.get(step.provides[0].__name__, [])
205 if (failed_step in step.dependencies):
209 if not self.driver.enabled or not self.driver.has_openstack:
213 logger.info('Waiting for event')
214 tBeforeWait = time.time()
215 self.wait_for_event(timeout=30)
216 logger.info('Observer woke up')
218 # Set of whole steps that failed
221 # Set of individual objects within steps that failed
222 failed_step_objects = []
224 for S in self.ordered_steps:
225 step = self.step_lookup[S]
226 start_time=time.time()
228 sync_step = step(driver=self.driver)
229 sync_step.__name__ = step.__name__
230 sync_step.dependencies = []
232 mlist = sync_step.provides
235 sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
238 sync_step.debug_mode = debug_mode
242 # Various checks that decide whether
243 # this step runs or not
244 self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
245 self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
248 logging.info('Step not ready: %s'%sync_step.__name__)
249 failed_steps.append(sync_step)
251 failed_steps.append(sync_step)
255 duration=time.time() - start_time
257 # ********* This is the actual sync step
260 failed_objects = sync_step(failed=failed_step_objects)
263 self.check_duration(sync_step, duration)
265 failed_step_objects.extend(failed_objects)
266 self.update_run_time(sync_step)
269 failed_steps.append(S)
270 self.save_run_times()
272 logger.log_exc("Exception in observer run loop")
273 traceback.print_exc()