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# -*- coding: utf-8 -*- |
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"""Conntrack metrics reader for /proc on Linux.""" |
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import os.path |
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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 Conntrack(plumd.Reader): |
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"""Plugin to measure conntrack 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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'conntrack_paths': [("{0}/sys/net/netfilter/nf_conntrack_count", |
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"{0}/sys/net/nf_conntrack_max"), |
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("{0}/sys/net/ipv4/netfilter/ip_conntrack_count", |
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"{0}/sys/net/ipv4/netfilter/ip_conntrack_max")] |
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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(Conntrack, self).__init__(log, config) |
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config.defaults(Conntrack.defaults) |
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proc_path = config.get('proc_path') |
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for fcount, fmax in config.get('conntrack_paths'): |
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self.fname_cnt = fcount.format(proc_path) |
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self.fname_max = fmax.format(proc_path) |
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if os.path.isfile(self.fname_cnt) and os.path.isfile(self.fname_max): |
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break |
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msg = "Conntrack: invalid path: {0}" |
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self.log.warn(msg.format(self.fname_cnt)) |
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self.log.warn(msg.format(self.fname_max)) |
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self.enabled = True |
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if not os.path.isfile(self.fname_cnt) or not os.path.isfile(self.fname_max): |
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self.enabled = False |
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msg = "Conntrack: no paths found, disabling (iptables running?)." |
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self.log.error(msg) |
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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 current conntrack count and max. |
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:rtype: plumd.Result |
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""" |
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result = plumd.Result("conntrack") |
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if not self.enabled: |
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return [result] |
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curr_val = 0 |
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max_val = 0 |
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# read and process /proc/stat |
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curr_val = get_file(self.fname_cnt) |
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max_val = get_file(self.fname_max) |
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result.add(plumd.Int("cur", curr_val)) |
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result.add(plumd.Int("max", max_val)) |
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return [result] |
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s4z /
plumd
