+import os
+import imp
+import inspect
import time
import traceback
import commands
#from timeout import timeout
from planetstack.config import Config
from observer.steps import *
+from syncstep import SyncStep
+from toposort import toposort
debug_mode = False
-logger = Logger(logfile='observer.log', level=logging.INFO)
+logger = Logger(level=logging.INFO)
class StepNotReady(Exception):
pass
-def toposort(g, steps):
- reverse = {}
-
- for k,v in g.items():
- for rk in v:
- try:
- reverse[rk].append(k)
- except:
- reverse[rk]=k
-
- sources = []
- for k,v in g.items():
- if not reverse.has_key(k):
- sources.append(k)
-
-
- for k,v in reverse.iteritems():
- if (not v):
- sources.append(k)
-
- order = []
- marked = []
-
- while sources:
- n = sources.pop()
- try:
- for m in g[n]:
- if m not in marked:
- sources.append(m)
- marked.append(m)
- except KeyError:
- pass
- order.append(n)
- return order
+class NoOpDriver:
+ def __init__(self):
+ self.enabled = True
class PlanetStackObserver:
- sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps]
+ #sync_steps = [SyncNetworks,SyncNetworkSlivers,SyncSites,SyncSitePrivileges,SyncSlices,SyncSliceMemberships,SyncSlivers,SyncSliverIps,SyncExternalRoutes,SyncUsers,SyncRoles,SyncNodes,SyncImages,GarbageCollector]
+ sync_steps = []
def __init__(self):
# The Condition object that gets signalled by Feefie events
+ self.step_lookup = {}
+ self.load_sync_step_modules()
self.load_sync_steps()
self.event_cond = threading.Condition()
- self.driver = OpenStackDriver()
+
+
+ self.driver_kind = getattr(Config(), "observer_driver", "openstack")
+ if self.driver_kind=="openstack":
+ self.driver = OpenStackDriver()
+ else:
+ self.driver = NoOpDriver()
def wait_for_event(self, timeout):
+ logger.info('Waiting for event')
self.event_cond.acquire()
self.event_cond.wait(timeout)
self.event_cond.release()
-
+
def wake_up(self):
logger.info('Wake up routine called. Event cond %r'%self.event_cond)
self.event_cond.acquire()
self.event_cond.notify()
self.event_cond.release()
+ def load_sync_step_modules(self, step_dir=None):
+ if step_dir is None:
+ if hasattr(Config(), "observer_steps_dir"):
+ step_dir = Config().observer_steps_dir
+ else:
+ step_dir = "/opt/planetstack/observer/steps"
+
+ for fn in os.listdir(step_dir):
+ pathname = os.path.join(step_dir,fn)
+ if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
+ module = imp.load_source(fn[:-3],pathname)
+ for classname in dir(module):
+ c = getattr(module, classname, None)
+
+ # make sure 'c' is a descendent of SyncStep and has a
+ # provides field (this eliminates the abstract base classes
+ # since they don't have a provides)
+
+ if inspect.isclass(c) and issubclass(c, SyncStep) and hasattr(c,"provides") and (c not in self.sync_steps):
+ self.sync_steps.append(c)
+ logger.info('loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps]))
+ # print 'loaded sync steps: %s' % ",".join([x.__name__ for x in self.sync_steps])
+
def load_sync_steps(self):
- dep_path = Config().observer_backend_dependency_graph
+ dep_path = Config().observer_dependency_graph
+ logger.info('Loading model dependency graph from %s' % dep_path)
try:
# This contains dependencies between records, not sync steps
self.model_dependency_graph = json.loads(open(dep_path).read())
except Exception,e:
raise e
- backend_path = Config().observer_backend_dependency_graph
try:
+ backend_path = Config().observer_pl_dependency_graph
+ logger.info('Loading backend dependency graph from %s' % backend_path)
# This contains dependencies between backend records
self.backend_dependency_graph = json.loads(open(backend_path).read())
except Exception,e:
+ logger.info('Backend dependency graph not loaded')
# We can work without a backend graph
self.backend_dependency_graph = {}
provides_dict = {}
for s in self.sync_steps:
+ self.step_lookup[s.__name__] = s
for m in s.provides:
try:
provides_dict[m.__name__].append(s.__name__)
for dest in provides_dict[m]:
# no deps, pass
try:
- step_graph[source].append(dest)
+ if (dest not in step_graph[source]):
+ step_graph[source].append(dest)
except:
step_graph[source]=[dest]
except KeyError:
dependency_graph = step_graph
- self.ordered_steps = toposort(dependency_graph, self.sync_steps)
+ self.ordered_steps = toposort(dependency_graph, map(lambda s:s.__name__,self.sync_steps))
print "Order of steps=",self.ordered_steps
self.load_run_times()
- def check_duration(self):
+ def check_duration(self, step, duration):
try:
- if (duration > S.deadline):
- logger.info('Sync step %s missed deadline, took %.2f seconds'%(S.name,duration))
+ if (duration > step.deadline):
+ logger.info('Sync step %s missed deadline, took %.2f seconds'%(step.name,duration))
except AttributeError:
# S doesn't have a deadline
pass
def update_run_time(self, step):
- self.last_run_times[step.name]=time.time()
+ self.last_run_times[step.__name__]=time.time()
def check_schedule(self, step):
- time_since_last_run = time.time() - self.last_run_times[step.name]
+ time_since_last_run = time.time() - self.last_run_times.get(step.__name__, 0)
try:
if (time_since_last_run < step.requested_interval):
raise StepNotReady
except AttributeError:
- logger.info('Step %s does not have requested_interval set'%step.name)
+ logger.info('Step %s does not have requested_interval set'%step.__name__)
raise StepNotReady
def load_run_times(self):
except:
self.last_run_times={}
for e in self.ordered_steps:
- self.last_run_times[e.name]=0
-
+ self.last_run_times[e]=0
def save_run_times(self):
open('/tmp/observer_run_times','w').write(run_times)
def check_class_dependency(self, step, failed_steps):
+ step.dependenices = []
+ for obj in step.provides:
+ step.dependenices.extend(self.model_dependency_graph.get(obj.__name__, []))
for failed_step in failed_steps:
- if (failed_step in self.dependency_graph[step.name]):
+ if (failed_step in step.dependencies):
raise StepNotReady
- def run(self):
- if not self.driver.enabled or not self.driver.has_openstack:
- return
- while True:
- try:
- logger.info('Waiting for event')
- tBeforeWait = time.time()
- self.wait_for_event(timeout=300)
- logger.info('Observer woke up')
+ def run_steps(self):
+ try:
+ logger.info('Observer run steps')
- # Set of whole steps that failed
- failed_steps = []
+ # Set of whole steps that failed
+ failed_steps = []
- # Set of individual objects within steps that failed
- failed_step_objects = []
+ # Set of individual objects within steps that failed
+ failed_step_objects = set()
- for S in self.ordered_steps:
- start_time=time.time()
+ for S in self.ordered_steps:
+ step = self.step_lookup[S]
+ start_time=time.time()
+
+ sync_step = step(driver=self.driver)
+ sync_step.__name__ = step.__name__
+ sync_step.dependencies = []
+ try:
+ mlist = sync_step.provides
- sync_step = S(driver=self.driver)
- sync_step.dependencies = self.dependencies[sync_step.name]
- sync_step.debug_mode = debug_mode
+ for m in mlist:
+ sync_step.dependencies.extend(self.model_dependency_graph[m.__name__])
+ except KeyError:
+ pass
+ sync_step.debug_mode = debug_mode
- should_run = False
+ should_run = False
+ try:
+ # Various checks that decide whether
+ # this step runs or not
+ self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
+ self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
+ should_run = True
+ except StepNotReady:
+ logging.info('Step not ready: %s'%sync_step.__name__)
+ failed_steps.append(sync_step)
+ except:
+ failed_steps.append(sync_step)
+
+ if (should_run):
try:
- # Various checks that decide whether
- # this step runs or not
- self.check_class_dependency(sync_step, failed_steps) # dont run Slices if Sites failed
- self.check_schedule(sync_step) # dont run sync_network_routes if time since last run < 1 hour
- should_run = True
- except StepNotReady:
- logging.info('Step not ready: %s'%sync_step.name)
- failed_steps.add(sync_step)
- except:
- failed_steps.add(sync_step)
+ duration=time.time() - start_time
- if (should_run):
- try:
- duration=time.time() - start_time
+ logger.info('Executing step %s' % sync_step.__name__)
- # ********* This is the actual sync step
- failed_objects = sync_step(failed=failed_step_objects)
+ # ********* This is the actual sync step
+ #import pdb
+ #pdb.set_trace()
+ failed_objects = sync_step(failed=list(failed_step_objects))
- check_deadline(sync_step, duration)
- failed_step_objects.extend(failed_objects)
- self.update_run_time(sync_step)
- except:
- failed_steps.add(S)
- self.save_run_times()
- except:
- logger.log_exc("Exception in observer run loop")
- traceback.print_exc()
+ self.check_duration(sync_step, duration)
+ if failed_objects:
+ failed_step_objects.update(failed_objects)
+ self.update_run_time(sync_step)
+ except:
+ failed_steps.append(S)
+ self.save_run_times()
+ except:
+ logger.log_exc("Exception in observer run loop")
+ traceback.print_exc()
+
+ def run(self):
+ try:
+ logger.info('Observer start run loop')
+ if not self.driver.enabled:
+ return
+ if (self.driver_kind=="openstack") and (not self.driver.has_openstack):
+ return
+
+ while True:
+ try:
+ self.wait_for_event(timeout=30)
+ except:
+ logger.log_exc("Exception in observer wait for event")
+ traceback.print_exc()
+
+ try:
+ self.run_steps()
+ except:
+ logger.log_exc("Exception in observer run steps")
+ traceback.print_exc()
+ except:
+ logger.log_exc("Exception in observer run loop")
+ traceback.print_exc()
git://git.onelab.eu / plstackapi.git / blobdiff