/
rrd_group_plugin.py
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/
rrd_group_plugin.py
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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
import redis
import time
from random import randrange
from rrd_plugin import RRDPlugin
from Gmetad.gmetad_plugin import GmetadPlugin
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 RRDGroupPlugin('rrdgroup')
def getRandomInterval(midpoint, range=5):
return randrange(max(midpoint-range,0), midpoint+range)
class RRDGroupPlugin(RRDPlugin):
''' This class implements the RRD plugin that stores metric summary data to RRD files.
It is derived from the RRDPlugin class.'''
RRD_GROUPS = 'summary_groups'
REDIS_HOST = 'redis_host'
REDIS_PORT = 'redis_port'
REDIS_DB = 'redis_db'
def __init__(self, cfgid):
# bh: Load config via rrd_plugin
RRDPlugin.__init__(self, 'RRD')
# bh: Set the default value for config 'rrd_groups'
self.cfg[RRDGroupPlugin.RRD_GROUPS] = []
self.cfg[RRDGroupPlugin.REDIS_HOST] = '127.0.0.1'
self.cfg[RRDGroupPlugin.REDIS_PORT] = 6379
self.cfg[RRDGroupPlugin.REDIS_DB] = 0
self.kwHandlers[RRDGroupPlugin.RRD_GROUPS] = self._parseRrdGroups
self.kwHandlers[RRDGroupPlugin.REDIS_HOST] = self._parseRedisHost
self.kwHandlers[RRDGroupPlugin.REDIS_PORT] = self._parseRedisPort
self.kwHandlers[RRDGroupPlugin.REDIS_DB] = self._parseRedisDB
GmetadPlugin.__init__(self, 'REDIS')
GmetadPlugin.__init__(self, cfgid)
self.hostCache = {}
try:
self.hostRedis = redis.StrictRedis(
host=self.cfg[RRDGroupPlugin.REDIS_HOST],
port=self.cfg[RRDGroupPlugin.REDIS_PORT],
db=self.cfg[RRDGroupPlugin.REDIS_DB]
)
self.hostRedis.ping()
except redis.ConnectionError:
logging.error('Redis server [%s:%d/%s] not ready' % (self.cfg[RRDGroupPlugin.REDIS_HOST], self.cfg[RRDGroupPlugin.REDIS_PORT], self.cfg[RRDGroupPlugin.REDIS_DB]))
raise
self._getHostInfo('vminfo')
def _parseRrdGroups(self, args):
''' Parse the RRD groups directive. '''
self.cfg[RRDGroupPlugin.RRD_GROUPS] = []
for rrdgroup in args.split():
self.cfg[RRDGroupPlugin.RRD_GROUPS].append(rrdgroup.strip().strip('"'))
def _parseRedisHost(self, arg):
''' Parse the Redis host. '''
self.cfg[RRDGroupPlugin.REDIS_HOST] = arg.strip().strip('"')
def _parseRedisPort(self, arg):
''' Parse the Redis port. '''
self.cfg[RRDGroupPlugin.REDIS_PORT] = arg.strip().strip('"')
def _parseRedisDB(self, arg):
''' Parse the Redis port. '''
self.cfg[RRDGroupPlugin.REDIS_DB] = arg.strip().strip('"')
def _getHostInfo(self, hostKey):
''' Get the host information from redis-server '''
if not self.hostCache.has_key(hostKey):
if not self.hostRedis.exists(hostKey):
return
hostInfo = self.hostRedis.hgetall(hostKey)
self.hostCache[hostKey] = hostInfo
return self.hostCache[hostKey]
def _updateGroupSummary(self, groupSummary, clusterNode):
clusterUp = (clusterNode.getAttr('status') == 'up')
for hostNode in clusterNode:
hostKey = hostNode.getAttr('name')
hostInfo = self._getHostInfo(hostKey)
if not hostInfo:
continue
for group in self.cfg[RRDGroupPlugin.RRD_GROUPS]:
if hostInfo.has_key(group):
summaryTime = int(time.time())
#self._updateGroupSummary(group, groupSummary, hostInfo, hostNode, clusterNode, int(time.time()))
if not hostInfo.has_key(group):
return
groupKey = hostInfo[group]
if not groupSummary.has_key(group):
groupSummary[group] = {}
if not groupSummary[group].has_key(groupKey):
groupSummary[group][groupKey] = {}
groupSummary[group][groupKey]['summary'] = {}
groupSummary[group][groupKey]['hosts_up'] = 0
groupSummary[group][groupKey]['hosts_down'] = 0
groupUp = (clusterNode.getAttr('status') == 'up')
reportedTime = summaryTime
if 'HOST' != hostNode.id:
return
reportedTime = int(hostNode.getAttr('reported'))
tn = int(hostNode.getAttr('tn'))
if hostNode.lastReportedTime == reportedTime:
tn = summaryTime - reportedTime
if tn < 0: tn = 0
hostNode.setAttr('tn', str(tn))
else:
hostNode.lastReportedTime = reportedTime
try:
if clusterUp and (int(hostNode.getAttr('tn')) < int(hostNode.getAttr('tmax')) * 4):
groupSummary[group][groupKey]['hosts_up'] += 1
else:
groupSummary[group][groupKey]['hosts_down'] += 1
except AttributeError:
pass
except KeyError:
pass
for metricNode in hostNode:
tn = int(metricNode.getAttr('tn'))
if metricNode.lastReportedTime == reportedTime:
tn = summaryTime - reportedTime
if tn < 0: tn = 0
metricNode.setAttr('tn', str(tn))
if metricNode.getAttr('type') in ['string', 'timestamp']:
continue
try:
summaryNode = groupSummary[group][groupKey]['summary'][str(metricNode)]
currSum = summaryNode.getAttr('sum')
summaryNode.incAttr('sum', float(metricNode.getAttr('val')))
except KeyError:
summaryNode = metricNode.summaryCopy(tag='METRICS')
summaryNode.setAttr('sum', float(metricNode.getAttr('val')))
summaryNode.setAttr('type', 'double')
groupSummary[group][groupKey]['summary'][str(summaryNode)] = summaryNode
summaryNode.incAttr('num', 1)
def _updateGroupRRD(self, groupSummary, clusterNode, ds):
groupRoot = '%s/GroupSummary'% self.cfg[RRDPlugin.RRD_ROOTDIR]
self._checkDir(groupRoot)
for group in groupSummary.keys():
groupPath = '%s/%s' % (groupRoot, group)
self._checkDir(groupPath)
for groupKey in groupSummary[group].keys():
groupKeyPath = '%s/%s' % (groupPath, groupKey)
self._checkDir(groupKeyPath)
for metricNode in groupSummary[group][groupKey]['summary'].itervalues():
rrdPath = '%s/%s.rrd'%(groupKeyPath, metricNode.getAttr('name'))
if not os.path.isfile(rrdPath):
self._createRRD(clusterNode, metricNode, rrdPath, ds.interval, True)
try:
self._updateRRD(clusterNode, metricNode, rrdPath, True)
except Exception:
pass
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"
pass
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"
pass
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 'GRID' == clusterNode.id:
# bh: We still do not process GRID here
return
if 'CLUSTER' == clusterNode.id:
if len(self.cfg[RRDGroupPlugin.RRD_GROUPS]) == 0:
# bh: No group is set so done
return
groupSummary = {}
self._updateGroupSummary(groupSummary, clusterNode)
self._updateGroupRRD(groupSummary, clusterNode, ds)
#print "RRDSummary notify called"