blob: 1319fecf8befdbe78a24d65d2b008353a85511ac [file] [log] [blame]
Sapan Bhatia26d40bc2014-05-12 15:28:02 -04001import os
2import imp
3import inspect
4import time
5import traceback
6import commands
7import threading
8import json
Sapan Bhatiad1f1df82014-09-03 11:29:49 -04009import pdb
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040010
11from datetime import datetime
12from collections import defaultdict
13from core.models import *
14from django.db.models import F, Q
15#from openstack.manager import OpenStackManager
16from openstack.driver import OpenStackDriver
17from util.logger import Logger, logging, logger
18#from timeout import timeout
19from planetstack.config import Config
Sapan Bhatia51f48932014-08-25 04:17:12 -040020from observer.steps import *
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040021from syncstep import SyncStep
22from toposort import toposort
Sapan Bhatia51f48932014-08-25 04:17:12 -040023from observer.error_mapper import *
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040024
25debug_mode = False
26
27logger = Logger(level=logging.INFO)
28
29class StepNotReady(Exception):
Sapan Bhatia51f48932014-08-25 04:17:12 -040030 pass
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040031
32class NoOpDriver:
Sapan Bhatia51f48932014-08-25 04:17:12 -040033 def __init__(self):
34 self.enabled = True
Sapan Bhatia4a1335c2014-09-03 01:06:17 -040035 self.dependency_graph = None
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040036
Sapan Bhatia723b1c32014-09-03 11:28:59 -040037STEP_STATUS_WORKING=1
38STEP_STATUS_OK=2
39STEP_STATUS_KO=3
40
41def invert_graph(g):
42 ig = {}
43 for k,v in g.items():
44 for v0 in v:
45 try:
46 ig[v0].append(k)
47 except:
48 ig=[k]
49 return ig
50
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040051class PlanetStackObserver:
Tony Mack3066a952015-01-05 22:48:11 -050052 #sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivilege,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,SyncRoles,SyncNodes,SyncImages,GarbageCollector]
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040053 sync_steps = []
54
Sapan Bhatia723b1c32014-09-03 11:28:59 -040055
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040056 def __init__(self):
57 # The Condition object that gets signalled by Feefie events
58 self.step_lookup = {}
59 self.load_sync_step_modules()
60 self.load_sync_steps()
61 self.event_cond = threading.Condition()
62
63 self.driver_kind = getattr(Config(), "observer_driver", "openstack")
64 if self.driver_kind=="openstack":
65 self.driver = OpenStackDriver()
66 else:
67 self.driver = NoOpDriver()
68
Sapan Bhatia723b1c32014-09-03 11:28:59 -040069 def wait_for_event(self, timeout):
70 self.event_cond.acquire()
71 self.event_cond.wait(timeout)
72 self.event_cond.release()
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040073
Sapan Bhatia723b1c32014-09-03 11:28:59 -040074 def wake_up(self):
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040075 logger.info('Wake up routine called. Event cond %r'%self.event_cond)
Sapan Bhatia723b1c32014-09-03 11:28:59 -040076 self.event_cond.acquire()
77 self.event_cond.notify()
78 self.event_cond.release()
Sapan Bhatia26d40bc2014-05-12 15:28:02 -040079
80 def load_sync_step_modules(self, step_dir=None):
81 if step_dir is None:
82 if hasattr(Config(), "observer_steps_dir"):
83 step_dir = Config().observer_steps_dir
84 else:
85 step_dir = "/opt/planetstack/observer/steps"
86
87 for fn in os.listdir(step_dir):
88 pathname = os.path.join(step_dir,fn)
89 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
90 module = imp.load_source(fn[:-3],pathname)
91 for classname in dir(module):
92 c = getattr(module, classname, None)
93
94 # make sure 'c' is a descendent of SyncStep and has a
95 # provides field (this eliminates the abstract base classes
96 # since they don't have a provides)
97
98 if inspect.isclass(c) and issubclass(c, SyncStep) and hasattr(c,"provides") and (c not in self.sync_steps):
99 self.sync_steps.append(c)
100 logger.info('loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps]))
101 # print 'loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps])
102
103 def load_sync_steps(self):
104 dep_path = Config().observer_dependency_graph
105 logger.info('Loading model dependency graph from %s' % dep_path)
106 try:
107 # This contains dependencies between records, not sync steps
108 self.model_dependency_graph = json.loads(open(dep_path).read())
109 except Exception,e:
110 raise e
111
112 try:
113 backend_path = Config().observer_pl_dependency_graph
114 logger.info('Loading backend dependency graph from %s' % backend_path)
115 # This contains dependencies between backend records
116 self.backend_dependency_graph = json.loads(open(backend_path).read())
117 except Exception,e:
Sapan Bhatia51f48932014-08-25 04:17:12 -0400118 logger.info('Backend dependency graph not loaded')
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400119 # We can work without a backend graph
120 self.backend_dependency_graph = {}
121
122 provides_dict = {}
123 for s in self.sync_steps:
124 self.step_lookup[s.__name__] = s
125 for m in s.provides:
126 try:
127 provides_dict[m.__name__].append(s.__name__)
128 except KeyError:
129 provides_dict[m.__name__]=[s.__name__]
130
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400131 step_graph = {}
132 for k,v in self.model_dependency_graph.iteritems():
133 try:
134 for source in provides_dict[k]:
135 for m in v:
136 try:
137 for dest in provides_dict[m]:
138 # no deps, pass
139 try:
140 if (dest not in step_graph[source]):
141 step_graph[source].append(dest)
142 except:
143 step_graph[source]=[dest]
144 except KeyError:
145 pass
146
147 except KeyError:
148 pass
149 # no dependencies, pass
150
151 #import pdb
152 #pdb.set_trace()
153 if (self.backend_dependency_graph):
154 backend_dict = {}
155 for s in self.sync_steps:
156 for m in s.serves:
157 backend_dict[m]=s.__name__
158
159 for k,v in backend_dependency_graph.iteritems():
160 try:
161 source = backend_dict[k]
162 for m in v:
163 try:
164 dest = backend_dict[m]
165 except KeyError:
166 # no deps, pass
167 pass
168 step_graph[source]=dest
169
170 except KeyError:
171 pass
172 # no dependencies, pass
173
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400174 self.dependency_graph = step_graph
Sapan Bhatia723b1c32014-09-03 11:28:59 -0400175 self.deletion_dependency_graph = invert_graph(step_graph)
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400176
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400177 self.ordered_steps = toposort(self.dependency_graph, map(lambda s:s.__name__,self.sync_steps))
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400178 print "Order of steps=",self.ordered_steps
179 self.load_run_times()
180
181
182 def check_duration(self, step, duration):
183 try:
184 if (duration > step.deadline):
185 logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
186 except AttributeError:
187 # S doesn't have a deadline
188 pass
189
190 def update_run_time(self, step, deletion):
191 if (not deletion):
192 self.last_run_times[step.__name__]=time.time()
193 else:
194 self.last_deletion_run_times[step.__name__]=time.time()
195
196
197 def check_schedule(self, step, deletion):
198 last_run_times = self.last_run_times if not deletion else self.last_deletion_run_times
199
200 time_since_last_run = time.time() - last_run_times.get(step.__name__, 0)
201 try:
202 if (time_since_last_run < step.requested_interval):
203 raise StepNotReady
204 except AttributeError:
205 logger.info('Step %s does not have requested_interval set'%step.__name__)
206 raise StepNotReady
207
208 def load_run_times(self):
209 try:
210 jrun_times = open('/tmp/observer_run_times').read()
211 self.last_run_times = json.loads(jrun_times)
212 except:
213 self.last_run_times={}
214 for e in self.ordered_steps:
215 self.last_run_times[e]=0
216 try:
217 jrun_times = open('/tmp/observer_deletion_run_times').read()
218 self.last_deletion_run_times = json.loads(jrun_times)
219 except:
220 self.last_deletion_run_times={}
221 for e in self.ordered_steps:
222 self.last_deletion_run_times[e]=0
223
224
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400225 def save_run_times(self):
226 run_times = json.dumps(self.last_run_times)
227 open('/tmp/observer_run_times','w').write(run_times)
228
229 deletion_run_times = json.dumps(self.last_deletion_run_times)
230 open('/tmp/observer_deletion_run_times','w').write(deletion_run_times)
231
232 def check_class_dependency(self, step, failed_steps):
233 step.dependenices = []
234 for obj in step.provides:
235 step.dependenices.extend(self.model_dependency_graph.get(obj.__name__, []))
236 for failed_step in failed_steps:
237 if (failed_step in step.dependencies):
238 raise StepNotReady
239
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400240 def sync(self, S, deletion):
241 step = self.step_lookup[S]
242 start_time=time.time()
243
Sapan Bhatiaf3deba92014-09-03 11:29:22 -0400244 dependency_graph = self.dependency_graph if not deletion else self.deletion_dependency_graph
Sapan Bhatia51f48932014-08-25 04:17:12 -0400245
Sapan Bhatiaf3deba92014-09-03 11:29:22 -0400246 # Wait for step dependencies to be met
247 try:
248 deps = self.dependency_graph[S]
249 has_deps = True
250 except KeyError:
251 has_deps = False
252
253 if (has_deps):
254 for d in deps:
255 cond = self.step_conditions[d]
256 cond.acquire()
257 if (self.step_status[d] is STEP_STATUS_WORKING):
258 cond.wait()
259 cond.release()
260 go = self.step_status[d] == STEP_STATUS_OK
261 else:
262 go = True
263
264 if (not go):
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400265 self.failed_steps.append(sync_step)
Sapan Bhatia6ff37c42014-09-03 05:28:42 -0400266 my_status = STEP_STATUS_KO
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400267 else:
Sapan Bhatiaf3deba92014-09-03 11:29:22 -0400268 sync_step = step(driver=self.driver,error_map=self.error_mapper)
Sapan Bhatia6ff37c42014-09-03 05:28:42 -0400269 sync_step.__name__ = step.__name__
270 sync_step.dependencies = []
271 try:
272 mlist = sync_step.provides
273
274 for m in mlist:
275 sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
276 except KeyError:
277 pass
278 sync_step.debug_mode = debug_mode
279
280 should_run = False
281 try:
282 # Various checks that decide whether
283 # this step runs or not
284 self.check_class_dependency(sync_step, self.failed_steps) # dont run Slices if Sites failed
285 self.check_schedule(sync_step, deletion) # dont run sync_network_routes if time since last run < 1 hour
286 should_run = True
287 except StepNotReady:
288 logging.info('Step not ready: %s'%sync_step.__name__)
289 self.failed_steps.append(sync_step)
290 my_status = STEP_STATUS_KO
291 except Exception,e:
292 logging.error('%r',e)
293 logger.log_exc("sync step failed: %r. Deletion: %r"%(sync_step,deletion))
294 self.failed_steps.append(sync_step)
295 my_status = STEP_STATUS_KO
296
297 if (should_run):
298 try:
299 duration=time.time() - start_time
300
301 logger.info('Executing step %s' % sync_step.__name__)
302
303 failed_objects = sync_step(failed=list(self.failed_step_objects), deletion=deletion)
304
305 self.check_duration(sync_step, duration)
306
307 if failed_objects:
308 self.failed_step_objects.update(failed_objects)
309
310 my_status = STEP_STATUS_OK
311 self.update_run_time(sync_step,deletion)
312 except Exception,e:
313 logging.error('Model step failed. This seems like a misconfiguration or bug: %r. This error will not be relayed to the user!',e)
314 logger.log_exc(e)
315 self.failed_steps.append(S)
316 my_status = STEP_STATUS_KO
317 else:
318 my_status = STEP_STATUS_OK
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400319
320 try:
321 my_cond = self.step_conditions[S]
322 my_cond.acquire()
323 self.step_status[S]=my_status
324 my_cond.notify_all()
325 my_cond.release()
Sapan Bhatia6ff37c42014-09-03 05:28:42 -0400326 except KeyError,e:
327 logging.info('Step %r is a leaf')
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400328 pass
Sapan Bhatia51f48932014-08-25 04:17:12 -0400329
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400330 def run(self):
331 if not self.driver.enabled:
332 return
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400333
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400334 if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
335 return
336
337 while True:
338 try:
339 error_map_file = getattr(Config(), "error_map_path", "/opt/planetstack/error_map.txt")
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400340 self.error_mapper = ErrorMapper(error_map_file)
341
342 # Set of whole steps that failed
343 self.failed_steps = []
344
345 # Set of individual objects within steps that failed
346 self.failed_step_objects = set()
347
348 # Set up conditions and step status
349 # This is needed for steps to run in parallel
350 # while obeying dependencies.
351
352 providers = set()
353 for v in self.dependency_graph.values():
354 if (v):
355 providers.update(v)
Sapan Bhatia723b1c32014-09-03 11:28:59 -0400356
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400357 self.step_conditions = {}
358 self.step_status = {}
359 for p in list(providers):
360 self.step_conditions[p] = threading.Condition()
Sapan Bhatiad1f1df82014-09-03 11:29:49 -0400361 self.step_status[p] = STEP_STATUS_WORKING
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400362
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400363
364 logger.info('Waiting for event')
365 tBeforeWait = time.time()
Sapan Bhatia13d89152014-07-23 10:35:33 -0400366 self.wait_for_event(timeout=30)
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400367 logger.info('Observer woke up')
368
369 # Two passes. One for sync, the other for deletion.
Sapan Bhatia0f727b82014-08-18 02:44:20 -0400370 for deletion in [False,True]:
Sapan Bhatia51f48932014-08-25 04:17:12 -0400371 threads = []
Sapan Bhatiabab33762014-07-22 01:21:36 -0400372 logger.info('Deletion=%r...'%deletion)
Sapan Bhatia723b1c32014-09-03 11:28:59 -0400373 schedule = self.ordered_steps if not deletion else reversed(self.ordered_steps)
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400374
Sapan Bhatiaf3deba92014-09-03 11:29:22 -0400375 for S in schedule:
376 thread = threading.Thread(target=self.sync, args=(S, deletion))
Sapan Bhatia4a1335c2014-09-03 01:06:17 -0400377
Sapan Bhatiaf3deba92014-09-03 11:29:22 -0400378 logger.info('Deletion=%r...'%deletion)
379 threads.append(thread)
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400380
Sapan Bhatia51f48932014-08-25 04:17:12 -0400381 # Start threads
382 for t in threads:
383 t.start()
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400384
Sapan Bhatia51f48932014-08-25 04:17:12 -0400385 # Wait for all threads to finish before continuing with the run loop
386 for t in threads:
387 t.join()
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400388
Sapan Bhatia26d40bc2014-05-12 15:28:02 -0400389 self.save_run_times()
390 except Exception, e:
391 logging.error('Core error. This seems like a misconfiguration or bug: %r. This error will not be relayed to the user!',e)
392 logger.log_exc("Exception in observer run loop")
393 traceback.print_exc()