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#/*******************************************************************************
#* Portions Copyright (C) 2008 Novell, Inc. All rights reserved.
#*
#* Redistribution and use in source and binary forms, with or without
#* modification, are permitted provided that the following conditions are met:
#*
#* - Redistributions of source code must retain the above copyright notice,
#* this list of conditions and the following disclaimer.
#*
#* - Redistributions in binary form must reproduce the above copyright notice,
#* this list of conditions and the following disclaimer in the documentation
#* and/or other materials provided with the distribution.
#*
#* - Neither the name of Novell, Inc. nor the names of its
#* contributors may be used to endorse or promote products derived from this
#* software without specific prior written permission.
#*
#* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
#* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#* ARE DISCLAIMED. IN NO EVENT SHALL Novell, Inc. OR THE CONTRIBUTORS
#* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
#* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
#* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
#* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
#* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#* POSSIBILITY OF SUCH DAMAGE.
#*
#* Authors: Matt Ryan (mrayn novell.com)
#* Brad Nicholes (bnicholes novell.com)
#******************************************************************************/
import os
import rrdtool
import logging
import threading
from random import randrange
from rrd_plugin import RRDPlugin
from Gmetad.gmetad_config import getConfig, GmetadConfig
from Gmetad.gmetad_data import DataStore
def get_plugin():
''' All plugins are required to implement this method. It is used as the factory
function that instanciates a new plugin instance. '''
# The plugin configuration ID that is passed in must match the section name
# in the configuration file.
return RRDSummaryPlugin('rrdsummary')
def getRandomInterval(midpoint, range=5):
return randrange(max(midpoint-range,0), midpoint+range)
class RRDSummaryPlugin(RRDPlugin):
''' This class implements the RRD plugin that stores metric summary data to RRD files.
It is derived from the RRDPlugin class.'''
def __init__(self, cfgid):
RRDPlugin.__init__(self, 'RRD')
def start(self):
'''Called by the engine during initialization to get the plugin going.'''
# Start the RRD root summary thread that will periodically update the summary RRDs
self.rootSummary = RRDRootSummary()
self.rootSummary.start()
#print "RRDSummary start called"
def stop(self):
'''Called by the engine during shutdown to allow the plugin to shutdown.'''
# Shut down the RRD root summary thread
self.rootSummary.shutdown()
#print "RRDSummary stop called"
def notify(self, clusterNode):
'''Called by the engine when the internal data structure has changed.'''
gmetadConfig = getConfig()
try:
if clusterNode.getAttr('status') == 'down':
return
except AttributeError:
pass
# Find the data source configuration entry that matches the cluster name
for ds in gmetadConfig[GmetadConfig.DATA_SOURCE]:
if ds.name == clusterNode.getAttr('name'):
break
if ds is None:
logging.info('No matching data source for %s'%clusterNode.getAttr('name'))
return
if 'CLUSTER' == clusterNode.id:
# Create the summary RRD base path and validate it
clusterPath = '%s/%s'%(self.cfg[RRDPlugin.RRD_ROOTDIR], clusterNode.getAttr('name'))
self._checkDir(clusterPath)
clusterPath = '%s/__SummaryInfo__'%clusterPath
self._checkDir(clusterPath)
# Update metrics for each cluster
for metricNode in clusterNode.summaryData['summary'].itervalues():
# Create the summary RRD final path and validate it
rrdPath = '%s/%s.rrd'%(clusterPath,metricNode.getAttr('name'))
# Create the RRD metric summary file if it doesn't exist
if not os.path.isfile(rrdPath):
self._createRRD(clusterNode, metricNode, rrdPath, ds.interval, True)
#need to do some error checking here if the createRRD failed
# Update the RRD file.
try:
self._updateRRD(clusterNode, metricNode, rrdPath, True)
except Exception:
pass
if 'GRID' == clusterNode.id:
try:
# Create the summary RRD base path and validate it
gridPath = '%s/%s'%(self.cfg[RRDPlugin.RRD_ROOTDIR], clusterNode.getAttr('name'))
self._checkDir(gridPath)
gridPath = '%s/__SummaryInfo__'%gridPath
# Update metrics for the grid
# If there isn't any summary data, then no need to continue.
if not hasattr(clusterNode, 'summaryData'):
return
# Update metrics RRDs for grid summary
for metricNode in clusterNode.summaryData['summary'].itervalues():
# Create the summary RRD final path and validate it.
rrdPath = '%s/%s.rrd'%(gridPath,metricNode.getAttr('name'))
# if the RRD file doesn't exist then create it
if not os.path.isfile(rrdPath):
self._createRRD(clusterNode, metricNode, rrdPath, 15, True)
#need to do some error checking here if the createRRD failed
# Update the RRD file.
self._updateRRD(clusterNode, metricNode, rrdPath, True)
except Exception, e:
logging.error('Error writing to summary RRD %s'%str(e))
#print "RRDSummary notify called"
class RRDRootSummary(threading.Thread, RRDPlugin):
''' This class writes the root summaries for all of the clusters in the grid. It is a thread class that is
also derived from the RRDPlugin class. '''
def __init__(self):
threading.Thread.__init__(self)
# Call the base class init so that we have access to its configuration directives.
RRDPlugin.__init__(self, 'RRD')
self._cond = threading.Condition()
self._running = False
self._shuttingDown = False
def writeRootSummary(self):
''' This method updates the RRD summary files.'''
ds = DataStore()
rootNode = ds.rootElement
# If there isn't a root node then there is not need to continue.
if rootNode is None: return
# Get a lock on the data store.
ds.acquireLock(self)
try:
gmetadConfig = getConfig()
# Create the summary RRD base path and validate it
rootPath = '%s/__SummaryInfo__'%self.cfg[RRDPlugin.RRD_ROOTDIR]
self._checkDir(rootPath)
# Update metrics for each grid node (there should only be one.)
for gridNode in rootNode:
# If there isn't any summary data, then no need to continue.
if not hasattr(gridNode, 'summaryData'):
continue
# Update metrics RRDs for each cluster summary in the grid
for metricNode in gridNode.summaryData['summary'].itervalues():
# Create the summary RRD final path and validate it.
rrdPath = '%s/%s.rrd'%(rootPath,metricNode.getAttr('name'))
# if the RRD file doesn't exist then create it
if not os.path.isfile(rrdPath):
self._createRRD(rootNode, metricNode, rrdPath, 15, True)
#need to do some error checking here if the createRRD failed
# Update the RRD file.
self._updateRRD(rootNode, metricNode, rrdPath, True)
except Exception, e:
logging.error('Error writing to summary RRD %s'%str(e))
ds.releaseLock(self)
#print "RRDRootSummary called"
def run(self):
if self._running:
return
self._running = True
while not self._shuttingDown:
self._cond.acquire()
# wait a random time between 10 and 30 seconds
self._cond.wait(getRandomInterval(20, 10))
self._cond.release()
# If we aren't shutting down then do the grid summary
if not self._shuttingDown:
self.writeRootSummary()
def shutdown(self):
self._shuttingDown = True
self._cond.acquire()
self._cond.notifyAll()
self._cond.release()
self.join()
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