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# -*- coding: utf-8 -*- |
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"""Load average reader for /proc on Linux.""" |
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import plumd |
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from plumd.util import get_file |
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__author__ = 'Kenny Freeman' |
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__email__ = '[email protected]' |
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__license__ = "ISCL" |
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__docformat__ = 'reStructuredText' |
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class LoadAverage(plumd.Reader): |
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"""Plugin to measure various kernel metrics from /proc.""" |
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proc_colums = 5 |
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defaults = { |
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'poll.interval': 10, |
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'proc_path': '/proc' |
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} |
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def __init__(self, log, config): |
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"""Plugin to measure various kernel metrics from /proc. |
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:param log: A logger |
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:type log: logging.RootLogger |
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:param config: a plumd.config.Conf configuration helper instance. |
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:type config: plumd.config.Conf |
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""" |
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super(LoadAverage, self).__init__(log, config) |
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config.defaults(LoadAverage.defaults) |
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self.proc_file = "{0}/loadavg".format(config.get('proc_path')) |
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ncols = len(get_file(self.proc_file).strip().split()) |
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self.enabled = ncols == LoadAverage.proc_colums |
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if not self.enabled: |
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msg = "LoadAverage: invalid: {0} has {1} cols, expected {2}" |
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self.log.error(msg.format(self.proc_file, ncols, |
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LoadAverage.proc_colums)) |
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def poll(self): |
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"""Poll for kernel metrics under /proc. |
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:rtype: ResultSet |
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""" |
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return plumd.ResultSet(self.check()) |
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def check(self): |
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"""Return 1, 5 and 15 minute load averages from proc file loadavg. |
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:rtype: plumd.Result |
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""" |
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result = plumd.Result("loadavg") |
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if not self.enabled: |
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return result |
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dat = [] |
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# read and process /proc/stat |
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dat = get_file(self.proc_file).split() |
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if len(dat) >= 3: |
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result.add(plumd.Float("1", dat[0])) |
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result.add(plumd.Float("5", dat[1])) |
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result.add(plumd.Float("15", dat[2])) |
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return [result] |
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s4z /
plumd
