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# -*- coding: utf-8 -*- |
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"""Memory metrics reader for /proc on Linux.""" |
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import plumd |
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from plumd.util import Filter |
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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 Mem(plumd.Reader): |
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"""Plugin to measure various kernel metrics from /proc.""" |
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defaults = { |
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'poll.interval': 10, |
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'proc_path': '/proc', |
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'proc_meminfo_gauges': ["MemTotal", "MemFree", "MemAvailable", |
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"Buffers", "Cached", "Active", "Inactive", |
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"Unevictable", "Mlocked", "SwapTotal", |
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"SwapFree", "Dirty", "Mapped", "Slab", |
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"SReclaimable", "SUnreclaim", "CommitLimit", |
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"Committed_AS", "VmallocTotal", "VmallocUsed", |
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"VmallocChunk", "HardwareCorrupted"] |
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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(Mem, self).__init__(log, config) |
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self.config.defaults(Mem.defaults) |
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self.proc_file = "{0}/meminfo".format(config.get('proc_path')) |
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self.filter = Filter() |
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self.gauges = self.config.get('proc_meminfo_gauges') |
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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 memory utilization metrics from proc file mem. |
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:rtype: plumd.Result |
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""" |
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result = plumd.Result("mem") |
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dat = [] |
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metrics = {} |
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# read and process /proc/meminfo |
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with open(self.proc_file, 'r') as pfd: |
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dat = pfd.read().strip().split("\n") |
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# list of eg. ['MemTotal: 7902804 kB', ...] |
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for line in dat: |
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vals = line.split() |
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name = vals[0][:-1] |
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val = vals[1] |
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metrics[name] = val |
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# now record each metric configured |
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for mname in self.gauges: |
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if mname not in metrics: |
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self.log.error("proc: mem: unknown metric: {0}".format(mname)) |
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self.gauges.remove(mname) |
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continue |
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mstr = self.filter.process(mname) |
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result.add(plumd.Int(mstr, metrics[mname])) |
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return [result] |
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s4z /
plumd
