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
25 logger = Logger(level=logging.INFO)
27 class StepNotReady(Exception):
34 class PlanetStackObserver:
35 #sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,SyncRoles,SyncNodes,SyncImages,GarbageCollector]
39 # The Condition object that gets signalled by Feefie events
41 self.load_sync_step_modules()
42 self.load_sync_steps()
43 self.event_cond = threading.Condition()
46 self.driver_kind = getattr(Config(), "observer_driver", "openstack")
47 if self.driver_kind=="openstack":
48 self.driver = OpenStackDriver()
50 self.driver = NoOpDriver()
52 def wait_for_event(self, timeout):
53 logger.info('Waiting for event')
54 self.event_cond.acquire()
55 self.event_cond.wait(timeout)
56 self.event_cond.release()
59 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
60 self.event_cond.acquire()
61 self.event_cond.notify()
62 self.event_cond.release()
64 def load_sync_step_modules(self, step_dir=None):
66 if hasattr(Config(), "observer_steps_dir"):
67 step_dir = Config().observer_steps_dir
69 step_dir = "/opt/planetstack/observer/steps"
71 for fn in os.listdir(step_dir):
72 pathname = os.path.join(step_dir,fn)
73 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
74 module = imp.load_source(fn[:-3],pathname)
75 for classname in dir(module):
76 c = getattr(module, classname, None)
78 # make sure 'c' is a descendent of SyncStep and has a
79 # provides field (this eliminates the abstract base classes
80 # since they don't have a provides)
82 if inspect.isclass(c) and issubclass(c, SyncStep) and hasattr(c,"provides") and (c not in self.sync_steps):
83 self.sync_steps.append(c)
84 logger.info('loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps]))
85 # print 'loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps])
87 def load_sync_steps(self):
88 dep_path = Config().observer_dependency_graph
89 logger.info('Loading model dependency graph from %s' % dep_path)
91 # This contains dependencies between records, not sync steps
92 self.model_dependency_graph = json.loads(open(dep_path).read())
97 backend_path = Config().observer_pl_dependency_graph
98 logger.info('Loading backend dependency graph from %s' % backend_path)
99 # This contains dependencies between backend records
100 self.backend_dependency_graph = json.loads(open(backend_path).read())
102 logger.info('Backend dependency graph not loaded')
103 # We can work without a backend graph
104 self.backend_dependency_graph = {}
107 for s in self.sync_steps:
108 self.step_lookup[s.__name__] = s
111 provides_dict[m.__name__].append(s.__name__)
113 provides_dict[m.__name__]=[s.__name__]
117 for k,v in self.model_dependency_graph.iteritems():
119 for source in provides_dict[k]:
122 for dest in provides_dict[m]:
125 if (dest not in step_graph[source]):
126 step_graph[source].append(dest)
128 step_graph[source]=[dest]
134 # no dependencies, pass
138 if (self.backend_dependency_graph):
140 for s in self.sync_steps:
142 backend_dict[m]=s.__name__
144 for k,v in backend_dependency_graph.iteritems():
146 source = backend_dict[k]
149 dest = backend_dict[m]
153 step_graph[source]=dest
157 # no dependencies, pass
159 dependency_graph = step_graph
161 self.ordered_steps = toposort(dependency_graph, map(lambda s:s.__name__,self.sync_steps))
162 print "Order of steps=",self.ordered_steps
163 self.load_run_times()
166 def check_duration(self, step, duration):
168 if (duration > step.deadline):
169 logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
170 except AttributeError:
171 # S doesn't have a deadline
174 def update_run_time(self, step):
175 self.last_run_times[step.__name__]=time.time()
177 def check_schedule(self, step):
178 time_since_last_run = time.time() - self.last_run_times.get(step.__name__, 0)
180 if (time_since_last_run < step.requested_interval):
182 except AttributeError:
183 logger.info('Step %s does not have requested_interval set'%step.__name__)
186 def load_run_times(self):
188 jrun_times = open('/tmp/observer_run_times').read()
189 self.last_run_times = json.loads(jrun_times)
191 self.last_run_times={}
192 for e in self.ordered_steps:
193 self.last_run_times[e]=0
196 def save_run_times(self):
197 run_times = json.dumps(self.last_run_times)
198 open('/tmp/observer_run_times','w').write(run_times)
200 def check_class_dependency(self, step, failed_steps):
201 step.dependenices = []
202 for obj in step.provides:
203 step.dependenices.extend(self.model_dependency_graph.get(obj.__name__, []))
204 for failed_step in failed_steps:
205 if (failed_step in step.dependencies):
211 logger.info('Observer run steps')
213 # Set of whole steps that failed
216 # Set of individual objects within steps that failed
217 failed_step_objects = set()
219 for S in self.ordered_steps:
220 step = self.step_lookup[S]
221 start_time=time.time()
223 sync_step = step(driver=self.driver)
224 sync_step.__name__ = step.__name__
225 sync_step.dependencies = []
227 mlist = sync_step.provides
230 sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
233 sync_step.debug_mode = debug_mode
237 # Various checks that decide whether
238 # this step runs or not
239 self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
240 self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
243 logging.info('Step not ready: %s'%sync_step.__name__)
244 failed_steps.append(sync_step)
246 failed_steps.append(sync_step)
250 duration=time.time() - start_time
252 logger.info('Executing step %s' % sync_step.__name__)
254 # ********* This is the actual sync step
257 failed_objects = sync_step(failed=list(failed_step_objects))
260 self.check_duration(sync_step, duration)
262 failed_step_objects.update(failed_objects)
263 self.update_run_time(sync_step)
265 failed_steps.append(S)
266 self.save_run_times()
268 logger.log_exc("Exception in observer run loop")
269 traceback.print_exc()
273 logger.info('Observer start run loop')
274 if not self.driver.enabled:
276 if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
281 self.wait_for_event(timeout=30)
283 logger.log_exc("Exception in observer wait for event")
284 traceback.print_exc()
289 logger.log_exc("Exception in observer run steps")
290 traceback.print_exc()
292 logger.log_exc("Exception in observer run loop")
293 traceback.print_exc()