-# $Id$
-# $URL$
+###
"""Functionality common to all account classes.
-Each subclass of Account must provide five methods:
- (*) create() and destroy(), which are static;
- (*) configure(), start(), and stop(), which are not.
+Each subclass of Account must provide five methods:
+ (*) create() and destroy(), which are static;
+ (*) configure(), start(), and stop(), which are not.
configure(), which takes a record as its only argument, does
things like set up ssh keys. In addition, an Account subclass must
maximum stack size.
"""
-#import Queue
import os
import pwd, grp
import threading
import tools
-# When this variable is true, start after any ensure_created
-Startingup = False
# shell path -> account class association
shell_acct_class = {}
# account type -> account class association
destroy_sem = threading.Semaphore(1)
def register_class(acct_class):
- """Call once for each account class. This method adds the class to the dictionaries used to look up account classes by shell and type."""
+ """Call once for each account class. This method adds the class
+to the dictionaries used to look up account classes by shell and
+type."""
shell_acct_class[acct_class.SHELL] = acct_class
type_acct_class[acct_class.TYPE] = acct_class
logger.verbose('accounts: Initing account %s'%rec['name'])
self.name = rec['name']
self.keys = ''
- self.initscriptchanged = False
self.configure(rec)
@staticmethod
self.name = name # username
self._acct = None # the account object currently associated with this worker
- def ensure_created(self, rec, startingup = Startingup):
- """Check account type is still valid. If not, recreate sliver. If still valid,
- check if running and configure/start if not."""
+ def ensure_created(self, rec):
+ """Check account type is still valid. If not, recreate sliver.
+If still valid, check if running and configure/start if not."""
+ logger.log_data_in_file(rec,"/var/lib/nodemanager/%s.rec.txt"%rec['name'],
+ 'raw rec captured in ensure_created',logger.LOG_VERBOSE)
curr_class = self._get_class()
next_class = type_acct_class[rec['type']]
if next_class != curr_class:
self._destroy(curr_class)
create_sem.acquire()
- try: next_class.create(self.name, rec['vref'])
+ try: next_class.create(self.name, rec)
finally: create_sem.release()
if not isinstance(self._acct, next_class): self._acct = next_class(rec)
- if startingup or \
- not self.is_running() or \
- next_class != curr_class or \
- self._acct.initscriptchanged:
- self.start(rec)
- else: self._acct.configure(rec)
+ logger.verbose("accounts.ensure_created: %s, running=%r"%(self.name,self.is_running()))
+
+ # reservation_alive is set on reervable nodes, and its value is a boolean
+ if 'reservation_alive' in rec:
+ # reservable nodes
+ if rec['reservation_alive']:
+ # this sliver has the lease, it is safe to start it
+ if not self.is_running(): self.start(rec)
+ else: self.configure(rec)
+ else:
+ # not having the lease, do not start it
+ self.configure(rec)
+ # usual nodes - preserve old code
+ # xxx it's not clear what to do when a sliver changes type/class
+ # in a reservable node
+ else:
+ if not self.is_running() or next_class != curr_class:
+ self.start(rec)
+ else: self.configure(rec)
def ensure_destroyed(self): self._destroy(self._get_class())
- def start(self, rec, d = 0):
+ def start(self, rec, d = 0):
self._acct.configure(rec)
self._acct.start(delay=d)
+ def configure(self, rec):
+ self._acct.configure(rec)
+
def stop(self): self._acct.stop()
- def is_running(self):
+ def is_running(self):
if (self._acct != None) and self._acct.is_running():
status = True
else: