ffmap-backend/GlobalRRD.py

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import os
import subprocess
from RRD import RRD, DS, RRA
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class GlobalRRD(RRD):
ds_list = [
# Number of nodes available
DS('nodes', 'GAUGE', 120, 0, float('NaN')),
# Number of client available
DS('clients', 'GAUGE', 120, 0, float('NaN')),
]
rra_list = [
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# 2 hours of 1 minute samples
RRA('AVERAGE', 0.5, 1, 120),
# 31 days of 1 hour samples
RRA('AVERAGE', 0.5, 60, 744),
# ~5 years of 1 day samples
RRA('AVERAGE', 0.5, 1440, 1780),
]
def __init__(self, directory):
super().__init__(os.path.join(directory, "nodes.rrd"))
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self.ensure_sanity(self.ds_list, self.rra_list, step=60)
def update(self, nodeCount, clientCount):
super().update({'nodes': nodeCount, 'clients': clientCount})
def graph(self, filename, timeframe):
args = ["rrdtool", 'graph', filename,
'-s', '-' + timeframe,
'-w', '800',
'-h' '400',
'DEF:nodes=' + self.filename + ':nodes:AVERAGE',
'LINE1:nodes#F00:nodes\\l',
'DEF:clients=' + self.filename + ':clients:AVERAGE',
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'LINE2:clients#00F:clients']
subprocess.check_output(args)