-from plcapi import PLCAPI
-import random
-
-id="$Id$"
-savedargv = sys.argv[:]
-
-# NOTE: modules listed here should also be loaded in this order
-# see the priority set in each module - lower comes first
-known_modules=['net','conf_files', 'sm', 'bwmon']
-
-plugin_path = "/usr/share/NodeManager/plugins"
-
-default_period=600
-default_random=301
-
-parser = optparse.OptionParser()
-parser.add_option('-d', '--daemon', action='store_true', dest='daemon', default=False, help='run daemonized')
-parser.add_option('-s', '--startup', action='store_true', dest='startup', default=False, help='run all sliver startup scripts')
-parser.add_option('-f', '--config', action='store', dest='config', default='/etc/planetlab/plc_config', help='PLC configuration file')
-parser.add_option('-k', '--session', action='store', dest='session', default='/etc/planetlab/session', help='API session key (or file)')
-parser.add_option('-p', '--period', action='store', dest='period', default=default_period,
- help='Polling interval (sec) - default %d'%default_period)
-parser.add_option('-r', '--random', action='store', dest='random', default=default_random,
- help='Range for additional random polling interval (sec) -- default %d'%default_random)
-parser.add_option('-v', '--verbose', action='store_true', dest='verbose', default=False, help='more verbose log')
-parser.add_option('-P', '--path', action='store', dest='path', default=plugin_path, help='Path to plugins directory')
-
-# NOTE: BUG the 'help' for this parser.add_option() wont list plugins from the --path argument
-parser.add_option('-m', '--module', action='store', dest='module', default='', help='run a single module among '+' '.join(known_modules))
-(options, args) = parser.parse_args()
-
-# Deal with plugins directory
-if os.path.exists(options.path):
- sys.path.append(options.path)
- plugins = [ os.path.split(os.path.splitext(x)[0])[1] for x in glob.glob( os.path.join(options.path,'*.py') ) ]
- known_modules += plugins
-
-modules = []
-
-def GetSlivers(config, plc):
- '''Run call backs defined in modules'''
- try:
- logger.log("nodemanager: Syncing w/ PLC")
- # retrieve GetSlivers from PLC
- data = plc.GetSlivers()
- # use the magic 'default' slice to retrieve system-wide defaults
- getPLCDefaults(data, config)
- # tweak the 'vref' attribute from GetSliceFamily
- setSliversVref (data)
- # always dump it for debug purposes
- # used to be done only in verbose; very helpful though, and tedious to obtain,
- # so let's dump this unconditionnally
- logger.log_slivers(data)
- logger.verbose("nodemanager: Sync w/ PLC done")
- except:
- logger.log_exc("nodemanager: failed in GetSlivers")
- # XXX So some modules can at least boostrap.
- logger.log("nodemanager: Can't contact PLC to GetSlivers(). Continuing.")
- data = {}
- # Invoke GetSlivers() functions from the callback modules
- for module in modules:
- logger.verbose('trigerring GetSlivers callback for module %s'%module.__name__)
- try:
- callback = getattr(module, 'GetSlivers')
- callback(data, config, plc)
- except:
- logger.log_exc("nodemanager: GetSlivers failed to run callback for module %r"%module)
-
-
-def getPLCDefaults(data, config):
- '''
- Get PLC wide defaults from _default system slice. Adds them to config class.
- '''
- for slice in data.get('slivers'):
- if slice['name'] == config.PLC_SLICE_PREFIX+"_default":
- attr_dict = {}
- for attr in slice.get('attributes'): attr_dict[attr['tagname']] = attr['value']
- if len(attr_dict):
- logger.verbose("nodemanager: Found default slice overrides.\n %s" % attr_dict)
- config.OVERRIDES = attr_dict
- return
- # NOTE: if an _default slice existed, it would have been found above and
- # the routine would return. Thus, if we've gotten here, then no default
- # slice is bound to this node.
- if 'OVERRIDES' in dir(config): del config.OVERRIDES
-
-
-def setSliversVref (data):
- '''
- Tweak the 'vref' attribute in all slivers based on the 'GetSliceFamily' key
- '''
- # GetSlivers exposes the result of GetSliceFamily() as an separate key in data
- # It is safe to override the attributes with this, as this method has the right logic
- for sliver in data.get('slivers'):
+from plcapi import PLCAPI
+
+
+class NodeManager:
+
+ PLUGIN_PATH = "/usr/share/NodeManager/plugins"
+
+ DB_FILE = "/var/lib/nodemanager/getslivers.pickle"
+
+ # the modules in this directory that need to be run
+ # NOTE: modules listed here will also be loaded in this order
+ # once loaded, they get re-ordered after their priority (lower comes first)
+ # for determining the runtime order
+ core_modules=['net', 'conf_files', 'slivermanager', 'bwmon']
+
+ default_period=600
+ default_random=301
+ default_priority=100
+
+ def __init__ (self):
+
+ parser = optparse.OptionParser()
+ parser.add_option('-d', '--daemon', action='store_true', dest='daemon', default=False,
+ help='run daemonized')
+ parser.add_option('-f', '--config', action='store', dest='config', default='/etc/planetlab/plc_config',
+ help='PLC configuration file')
+ parser.add_option('-k', '--session', action='store', dest='session', default='/etc/planetlab/session',
+ help='API session key (or file)')
+ parser.add_option('-p', '--period', action='store', dest='period', default=NodeManager.default_period,
+ help='Polling interval (sec) - default %d'%NodeManager.default_period)
+ parser.add_option('-r', '--random', action='store', dest='random', default=NodeManager.default_random,
+ help='Range for additional random polling interval (sec) -- default %d'%NodeManager.default_random)
+ parser.add_option('-v', '--verbose', action='store_true', dest='verbose', default=False,
+ help='more verbose log')
+ parser.add_option('-P', '--path', action='store', dest='path', default=NodeManager.PLUGIN_PATH,
+ help='Path to plugins directory')
+
+ # NOTE: BUG the 'help' for this parser.add_option() wont list plugins from the --path argument
+ parser.add_option('-m', '--module', action='store', dest='user_module', default='', help='run a single module')
+ (self.options, args) = parser.parse_args()
+
+ if len(args) != 0:
+ parser.print_help()
+ sys.exit(1)
+
+ # determine the modules to be run
+ self.modules = NodeManager.core_modules
+ # Deal with plugins directory
+ if os.path.exists(self.options.path):
+ sys.path.append(self.options.path)
+ plugins = [ os.path.split(os.path.splitext(x)[0])[1]
+ for x in glob.glob( os.path.join(self.options.path,'*.py') )
+ if not x.endswith("/__init__.py")
+ ]
+ self.modules += plugins
+ if self.options.user_module:
+ assert self.options.user_module in self.modules
+ self.modules=[self.options.user_module]
+ logger.verbose('nodemanager: Running single module %s'%self.options.user_module)
+
+
+ def GetSlivers(self, config, plc):
+ """Retrieves GetSlivers at PLC and triggers callbacks defined in modules/plugins"""