ganglia系统监控2

import random
descriptors = list()
Random_Max = 50
Constant_Value = 50
def Random_Numbers(name):
'''Return a random number.'''
global Random_Max
return int(random.uniform(0,Random_Max))
def Constant_Number(name):
'''Return a constant number.'''
global Constant_Value
return int(Constant_Value)
def metric_init(params):
'''Initialize the random number generator and create the
metric definition dictionary object for each metric.'''
global descriptors
global Random_Max
global Constant_Value
random.seed()
print '[pyexample] Received the following parameters'
print params
if 'RandomMax' in params:
Random_Max = int(params['RandomMax'])
if 'ConstantValue' in params:
Constant_Value = int(params['ConstantValue'])
d1 = {'name': 'PyRandom_Numbers',
'call_back': Random_Numbers,
'time_max': 90,
'value_type': 'uint',
'units': 'N',
'slope': 'both',
'format': '%u',
'description': 'Example module metric (random numbers)',
'groups': 'example,random'}
d2 = {'name': 'PyConstant_Number',
'call_back': Constant_Number,
'time_max': 90,
'value_type': 'uint',
'units': 'N',
'slope': 'zero',
'format': '%hu',
'description': 'Example module constant (constant number)'}
descriptors = [d1,d2]
return descriptors
def metric_cleanup():
'''Clean up the metric module.'''
pass
#This code is for debugging and unit testing
if __name__ == '__main__':
params = {'RandomMax': '500',
'ConstantValue': '322'}
metric_init(params)
for d in descriptors:
v = d['call_back'](d['name'])
print 'value for %s is %u' % (d['name'],
v)

d1 = {'name': 'PyRandom_Numbers',
#metric的名字
'call_back': Random_Numbers,
#收集到数据后调用的方法
'time_max': 90,
#没有什么用。。。
'value_type': 'uint',
#string | uint | float | double
'units': 'N',
# metric的单位
'slope': 'both',
#zero | positive | negative | both
'format': '%u',
#必须和value_type对应 (reference: http://docs.python.org/library/stdtypes.html#string-formatting)
'description': 'Example module metric (random numbers)',
#对metric的描述，在前端可以看到
'groups': 'example,random'}
#这个metric属于的组,如果没有定义，会分到no_group metric中

 modules{
module {
name = "example"
language = "python"
# The following params are examples only
#
They are not actually used by the temp module
param RandomMax {
value = 600
}
param ConstantValue {
value = 112
}
}
}
collection_group {
collect_every = 10
time_threshold = 50
metric {
name = "PyRandom_Numbers"
#要显示的metric，与example.py中的d1名字对应
title = "Random"
#metric在网页上显示的标题
value_threshold = 70
}
metric {
name = "PyConstant_Number"
#要显示的metric，与example.py中的d2名字对应
title = "Constant"
#metric在网页上显示的标题
value_threshold = 70
}
}