ffmap-backend/rrd.py

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#!/usr/bin/env python3
import subprocess
import time
import os
class rrd:
def __init__( self
, databaseDirectory
, imagePath
, displayTimeGlobal = "7d"
, displayTimeNode = "1d"
):
self.dbPath = databaseDirectory
self.globalDbFile = databaseDirectory + "/nodes.rrd"
self.imagePath = imagePath
self.displayTimeGlobal = displayTimeGlobal
self.displayTimeNode = displayTimeNode
self.currentTimeInt = (int(time.time())/60)*60
self.currentTime = str(self.currentTimeInt)
def checkAndCreateIfNeededGlobalDatabase(self):
""" Creates the global database file iff it did not exist.
"""
if not os.path.exists(self.globalDbFile):
# Create Database with rrdtool
args = ["rrdtool",'create', self.globalDbFile
,'--start', str(round(self.currentTimeInt - 60))
,'--step' , '60'
# Number of nodes available
,'DS:nodes:GAUGE:120:0:U'
,'RRA:LAST:0:1:44640'
,'RRA:LAST:0:60:744'
,'RRA:LAST:0:1440:1780'
# Number of client available
,'DS:clients:GAUGE:120:0:U'
,'RRA:LAST:0:1:44640'
,'RRA:LAST:0:60:744'
,'RRA:LAST:0:1440:1780'
]
subprocess.call(args)
def updateGlobalDatabase(self,nodeCount,clientCount):
""" Adds a new (#Nodes,#Clients) entry to the global database.
"""
# Update Global RRDatabase
args = ["rrdtool",'updatev', self.globalDbFile
# #Nodes #Clients
, self.currentTime + ":"+str(nodeCount)+":"+str(clientCount)
]
subprocess.check_output(args)
def createGlobalGraph(self):
nodeGraph = self.imagePath + "/" + "globalGraph.png"
args = ["rrdtool", 'graph', nodeGraph, '-s', '-' + self.displayTimeGlobal, '-w', '800', '-h' '400'
,'DEF:nodes=' + self.globalDbFile + ':nodes:LAST', 'LINE1:nodes#F00:nodes\\l'
,'DEF:clients=' + self.globalDbFile + ':clients:LAST','LINE2:clients#00F:clients'
]
subprocess.check_output(args)
def nodeMACToRRDFile(self,nodeMAC):
return self.dbPath + "/" + str(nodeMAC).replace(":","") + ".rrd"
def nodeMACToPNGFile(self,nodeMAC):
return self.imagePath + "/" + str(nodeMAC).replace(":","") + ".png"
def checkAndCreateIfNeededNodeDatabase(self,nodePrimaryMAC):
# TODO check for bad nodeNames
nodeFile = self.nodeMACToRRDFile(nodePrimaryMAC);
if not os.path.exists(nodeFile):
# TODO Skalen anpassen
args = ["rrdtool",'create',nodeFile
,'--start',str(round(self.currentTimeInt - 60))
,'--step' , '60'
,'DS:upstate:GAUGE:120:0:1'
,'RRA:LAST:0:1:44640'
# Number of client available
,'DS:clients:GAUGE:120:0:U'
,'RRA:LAST:0:1:44640'
]
subprocess.check_output(args)
# Call only if node is up
def updateNodeDatabase(self,nodePrimaryMAC,clientCount):
nodeFile = self.nodeMACToRRDFile(nodePrimaryMAC)
# Update Global RRDatabase
args = ["rrdtool",'updatev', nodeFile
# #Upstate #Clients
, self.currentTime + ":"+str(1)+":"+str(clientCount)
]
subprocess.check_output(args)
def createNodeGraph(self,nodePrimaryMAC,displayTimeNode):
nodeGraph = self.nodeMACToPNGFile(nodePrimaryMAC)
nodeFile = self.nodeMACToRRDFile(nodePrimaryMAC)
args = ['rrdtool','graph', nodeGraph, '-s', '-' + self.displayTimeNode , '-w', '800', '-h', '400', '-l', '0', '-y', '1:1',
'DEF:clients=' + nodeFile + ':clients:LAST',
'VDEF:maxc=clients,MAXIMUM',
'CDEF:c=0,clients,ADDNAN',
'CDEF:d=clients,UN,maxc,UN,1,maxc,IF,*',
'AREA:c#0F0:up\\l',
'AREA:d#F00:down\\l',
'LINE1:c#00F:clients connected\\l',
]
subprocess.check_output(args)
def update_database(self,db):
nodes = {}
clientCount = 0
for node in db.get_nodes():
if node.flags['online']:
if not node.flags['client']:
nodes[node.id] = node
node.clients = 0;
clientCount -= 1
else:
clientCount += 1
for link in db.get_links():
source = link.source.interface
target = link.target.interface
if source in nodes and not target in nodes:
nodes[source].clients += 1
elif target in nodes and not source in nodes:
nodes[target].clients += 1
self.checkAndCreateIfNeededGlobalDatabase()
self.updateGlobalDatabase(len(nodes),clientCount)
for mac in nodes:
self.checkAndCreateIfNeededNodeDatabase(mac)
self.updateNodeDatabase(mac,nodes[mac].clients)
def update_images(self):
""" Creates a image for every rrd file in the database directory.
"""
self.createGlobalGraph()
nodeDbFiles = os.listdir(self.dbPath)
for fileName in nodeDbFiles:
nodeName = os.path.basename(fileName).split('.')
if nodeName[1] == 'rrd' and not nodeName[0] == "nodes":
self.createNodeGraph(nodeName[0],self.displayTimeNode)