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 error_mapper
26 logger = Logger(level=logging.INFO)
28 class StepNotReady(Exception):
35 class PlanetStackObserver:
36 #sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,SyncRoles,SyncNodes,SyncImages,GarbageCollector]
40 # The Condition object that gets signalled by Feefie events
42 self.load_sync_step_modules()
43 self.load_sync_steps()
44 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 self.event_cond.acquire()
54 self.event_cond.wait(timeout)
55 self.event_cond.release()
58 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
59 self.event_cond.acquire()
60 self.event_cond.notify()
61 self.event_cond.release()
63 def load_sync_step_modules(self, step_dir=None):
65 if hasattr(Config(), "observer_steps_dir"):
66 step_dir = Config().observer_steps_dir
68 step_dir = "/opt/planetstack/observer/steps"
70 for fn in os.listdir(step_dir):
71 pathname = os.path.join(step_dir,fn)
72 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
73 module = imp.load_source(fn[:-3],pathname)
74 for classname in dir(module):
75 c = getattr(module, classname, None)
77 # make sure 'c' is a descendent of SyncStep and has a
78 # provides field (this eliminates the abstract base classes
79 # since they don't have a provides)
81 if inspect.isclass(c) and issubclass(c, SyncStep) and hasattr(c,"provides") and (c not in self.sync_steps):
82 self.sync_steps.append(c)
83 logger.info('loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps]))
84 # print 'loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps])
86 def load_sync_steps(self):
87 dep_path = Config().observer_dependency_graph
88 logger.info('Loading model dependency graph from %s' % dep_path)
90 # This contains dependencies between records, not sync steps
91 self.model_dependency_graph = json.loads(open(dep_path).read())
96 backend_path = Config().observer_pl_dependency_graph
97 logger.info('Loading backend dependency graph from %s' % backend_path)
98 # This contains dependencies between backend records
99 self.backend_dependency_graph = json.loads(open(backend_path).read())
101 logger.info('Backend dependency graph not loaded')
102 # We can work without a backend graph
103 self.backend_dependency_graph = {}
106 for s in self.sync_steps:
107 self.step_lookup[s.__name__] = s
110 provides_dict[m.__name__].append(s.__name__)
112 provides_dict[m.__name__]=[s.__name__]
116 for k,v in self.model_dependency_graph.iteritems():
118 for source in provides_dict[k]:
121 for dest in provides_dict[m]:
124 if (dest not in step_graph[source]):
125 step_graph[source].append(dest)
127 step_graph[source]=[dest]
133 # no dependencies, pass
137 if (self.backend_dependency_graph):
139 for s in self.sync_steps:
141 backend_dict[m]=s.__name__
143 for k,v in backend_dependency_graph.iteritems():
145 source = backend_dict[k]
148 dest = backend_dict[m]
152 step_graph[source]=dest
156 # no dependencies, pass
158 dependency_graph = step_graph
160 self.ordered_steps = toposort(dependency_graph, map(lambda s:s.__name__,self.sync_steps))
161 print "Order of steps=",self.ordered_steps
162 self.load_run_times()
165 def check_duration(self, step, duration):
167 if (duration > step.deadline):
168 logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
169 except AttributeError:
170 # S doesn't have a deadline
173 def update_run_time(self, step):
174 self.last_run_times[step.__name__]=time.time()
176 def check_schedule(self, step):
177 time_since_last_run = time.time() - self.last_run_times.get(step.__name__, 0)
179 if (time_since_last_run < step.requested_interval):
181 except AttributeError:
182 logger.info('Step %s does not have requested_interval set'%step.__name__)
185 def load_run_times(self):
187 jrun_times = open('/tmp/observer_run_times').read()
188 self.last_run_times = json.loads(jrun_times)
190 self.last_run_times={}
191 for e in self.ordered_steps:
192 self.last_run_times[e]=0
195 def save_run_times(self):
196 run_times = json.dumps(self.last_run_times)
197 open('/tmp/observer_run_times','w').write(run_times)
199 def check_class_dependency(self, step, failed_steps):
200 step.dependenices = []
201 for obj in step.provides:
202 step.dependenices.extend(self.model_dependency_graph.get(obj.__name__, []))
203 for failed_step in failed_steps:
204 if (failed_step in step.dependencies):
208 if not self.driver.enabled:
210 if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
215 error_map_file = getattr(Config(), "error_map_path", "/opt/planetstack/error_map.txt")
216 error_mapper = ErrorMapper(error_map_file)
218 logger.info('Waiting for event')
219 tBeforeWait = time.time()
220 self.wait_for_event(timeout=30)
221 logger.info('Observer woke up')
223 # Set of whole steps that failed
226 # Set of individual objects within steps that failed
227 failed_step_objects = set()
229 for S in self.ordered_steps:
230 step = self.step_lookup[S]
231 start_time=time.time()
233 sync_step = step(driver=self.driver,error_map=error_mapper)
234 sync_step.__name__ = step.__name__
235 sync_step.dependencies = []
237 mlist = sync_step.provides
240 sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
243 sync_step.debug_mode = debug_mode
247 # Various checks that decide whether
248 # this step runs or not
249 self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
250 self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
253 logging.info('Step not ready: %s'%sync_step.__name__)
254 failed_steps.append(sync_step)
256 logging.error('%r',e)
257 logger.log_exc("sync step failed: %r!"%sync_step)
258 failed_steps.append(sync_step)
262 duration=time.time() - start_time
264 logger.info('Executing step %s' % sync_step.__name__)
266 # ********* This is the actual sync step
269 failed_objects = sync_step(failed=list(failed_step_objects))
272 self.check_duration(sync_step, duration)
274 failed_step_objects.update(failed_objects)
275 self.update_run_time(sync_step)
277 logging.error('Model step failed. This seems like a misconfiguration or bug: %r. This error will not be relayed to the user!',e)
279 failed_steps.append(S)
280 self.save_run_times()
282 logging.error('Core error. This seems like a misconfiguration or bug: %r. This error will not be relayed to the user!',e)
283 logger.log_exc("Exception in observer run loop")
284 traceback.print_exc()