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))
75 class PlanetStackObserver:
76 #sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,SyncRoles,SyncNodes,SyncImages,GarbageCollector]
80 # The Condition object that gets signalled by Feefie events
82 self.load_sync_step_modules()
83 self.load_sync_steps()
84 self.event_cond = threading.Condition()
85 self.driver = OpenStackDriver()
87 def wait_for_event(self, timeout):
88 self.event_cond.acquire()
89 self.event_cond.wait(timeout)
90 self.event_cond.release()
93 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
94 self.event_cond.acquire()
95 self.event_cond.notify()
96 self.event_cond.release()
98 def load_sync_step_modules(self, step_dir=None):
100 if hasattr(Config(), "step_dir"):
101 step_dir = Config().step_dir
103 step_dir = "/opt/planetstack/observer/steps"
105 for fn in os.listdir(step_dir):
106 pathname = os.path.join(step_dir,fn)
107 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
108 module = imp.load_source(fn[:-3],pathname)
109 for classname in dir(module):
110 c = getattr(module, classname, None)
112 # make sure 'c' is a descendent of SyncStep and has a
113 # provides field (this eliminates the abstract base classes
114 # since they don't have a provides)
116 if inspect.isclass(c) and issubclass(c, SyncStep) and hasattr(c,"provides") and (c not in self.sync_steps):
117 self.sync_steps.append(c)
118 logger.info('loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps]))
119 # print 'loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps])
121 def load_sync_steps(self):
122 dep_path = Config().observer_dependency_graph
123 logger.info('Loading model dependency graph from %s' % dep_path)
125 # This contains dependencies between records, not sync steps
126 self.model_dependency_graph = json.loads(open(dep_path).read())
131 backend_path = Config().observer_pl_dependency_graph
132 logger.info('Loading backend dependency graph from %s' % backend_path)
133 # This contains dependencies between backend records
134 self.backend_dependency_graph = json.loads(open(backend_path).read())
136 logger.info('Backend dependency graph not loaded')
137 # We can work without a backend graph
138 self.backend_dependency_graph = {}
141 for s in self.sync_steps:
142 self.step_lookup[s.__name__] = s
145 provides_dict[m.__name__].append(s.__name__)
147 provides_dict[m.__name__]=[s.__name__]
151 for k,v in self.model_dependency_graph.iteritems():
153 for source in provides_dict[k]:
156 for dest in provides_dict[m]:
159 step_graph[source].append(dest)
161 step_graph[source]=[dest]
167 # no dependencies, pass
171 if (self.backend_dependency_graph):
173 for s in self.sync_steps:
175 backend_dict[m]=s.__name__
177 for k,v in backend_dependency_graph.iteritems():
179 source = backend_dict[k]
182 dest = backend_dict[m]
186 step_graph[source]=dest
190 # no dependencies, pass
192 dependency_graph = step_graph
194 self.ordered_steps = toposort(dependency_graph, map(lambda s:s.__name__,self.sync_steps))
195 print "Order of steps=",self.ordered_steps
196 self.load_run_times()
199 def check_duration(self, step, duration):
201 if (duration > step.deadline):
202 logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
203 except AttributeError:
204 # S doesn't have a deadline
207 def update_run_time(self, step):
208 self.last_run_times[step.__name__]=time.time()
210 def check_schedule(self, step):
211 time_since_last_run = time.time() - self.last_run_times.get(step.__name__, 0)
213 if (time_since_last_run < step.requested_interval):
215 except AttributeError:
216 logger.info('Step %s does not have requested_interval set'%step.__name__)
219 def load_run_times(self):
221 jrun_times = open('/tmp/observer_run_times').read()
222 self.last_run_times = json.loads(jrun_times)
224 self.last_run_times={}
225 for e in self.ordered_steps:
226 self.last_run_times[e]=0
229 def save_run_times(self):
230 run_times = json.dumps(self.last_run_times)
231 open('/tmp/observer_run_times','w').write(run_times)
233 def check_class_dependency(self, step, failed_steps):
234 step.dependenices = []
235 for obj in step.provides:
236 step.dependenices.extend(self.model_dependency_graph.get(obj.__name__, []))
237 for failed_step in failed_steps:
238 if (failed_step in step.dependencies):
242 if not self.driver.enabled or not self.driver.has_openstack:
246 logger.info('Waiting for event')
247 tBeforeWait = time.time()
248 self.wait_for_event(timeout=30)
249 logger.info('Observer woke up')
251 # Set of whole steps that failed
254 # Set of individual objects within steps that failed
255 failed_step_objects = set()
257 for S in self.ordered_steps:
258 step = self.step_lookup[S]
259 start_time=time.time()
261 sync_step = step(driver=self.driver)
262 sync_step.__name__ = step.__name__
263 sync_step.dependencies = []
265 mlist = sync_step.provides
268 sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
271 sync_step.debug_mode = debug_mode
275 # Various checks that decide whether
276 # this step runs or not
277 self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
278 self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
281 logging.info('Step not ready: %s'%sync_step.__name__)
282 failed_steps.append(sync_step)
284 failed_steps.append(sync_step)
288 duration=time.time() - start_time
290 logger.info('Executing step %s' % sync_step.__name__)
292 # ********* This is the actual sync step
295 failed_objects = sync_step(failed=list(failed_step_objects))
298 self.check_duration(sync_step, duration)
300 failed_step_objects.update(failed_objects)
301 self.update_run_time(sync_step)
303 failed_steps.append(S)
304 self.save_run_times()
306 logger.log_exc("Exception in observer run loop")
307 traceback.print_exc()