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# -*- coding: utf-8 -*- |
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"""Reader for netstat metrics from /proc on Linux.""" |
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import time |
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from collections import deque |
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import plumd |
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from plumd.util import Differential |
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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 Netstat(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_netstat_gauges': { |
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'TcpExt': ["SyncookiesSent", "SyncookiesRecv", |
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"SyncookiesFailed", "OutOfWindowIcmps", "TW", "TWRecycled", |
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"TWKilled", "DelayedACKLost", "ListenOverflows", |
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"ListenDrops", "TCPLostRetransmit", "TCPRenoFailures", |
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"TCPSackFailures", "TCPLossFailures", "TCPFastRetrans", |
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"TCPForwardRetrans", "TCPSlowStartRetrans", "TCPTimeouts", |
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"TCPLossProbes", "TCPLossProbeRecovery", "TCPAbortOnData", |
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"TCPAbortOnClose", "TCPAbortOnMemory", "TCPAbortOnTimeout", |
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"TCPAbortOnLinger", "TCPAbortFailed", "TCPMemoryPressures", |
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"TCPBacklogDrop", "TCPMinTTLDrop", "TCPTimeWaitOverflow", |
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"TCPFastOpenActive", "TCPFastOpenActiveFail", |
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"TCPFastOpenPassive", "TCPFastOpenPassiveFail", |
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"TCPFastOpenListenOverflow", "TCPSynRetrans"], |
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'IpExt': ["InNoRoutes", "InTruncatedPkts", "InBcastPkts", |
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"OutBcastPkts", "InOctets", "OutOctets", "InBcastOctets", |
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"OutBcastOctets", "InCsumErrors", "InNoECTPkts", "InECT1Pkts", |
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"InECT0Pkts", "InCEPkts"] |
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}, |
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'proc_netstat_rates': {} |
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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(Netstat, self).__init__(log, config) |
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self.config.defaults(Netstat.defaults) |
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self.calc = Differential() |
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self.proc_file = "{0}/net/netstat".format(config.get('proc_path')) |
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self.gauges = self.config.get('proc_netstat_gauges') |
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self.rates = self.config.get('proc_netstat_rates') |
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def poll(self): |
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"""Poll for kernel metrics under proc file net/netstat. |
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:rtype: ResultSet |
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""" |
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return plumd.ResultSet(self.check()) |
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View Code Duplication |
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def check(self): |
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"""Return detailed network statitistics proc file net/netstat. |
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Note: ECT1Pkts and ECT0Pkts relate to ECT congestion notifications. |
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:rtype: plumd.Result |
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""" |
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# what metrics do we want to record? |
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result = plumd.Result("netstat") |
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# read the proc file |
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dat = None |
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with open(self.proc_file, 'r') as f: |
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dat = f.read().strip().split("\n") |
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# timestamp for Differential calculations |
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ts = time.time() |
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# split values into lists |
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dlist = deque([entry.split() for entry in dat]) |
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# put lists into key: value dict |
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metrics = {} |
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while dlist: |
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headers = dlist.popleft() |
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values = dlist.popleft() |
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# { 'IpExt': {'InNoRoutes': 0, ...} } - [:-1] on IpExt: removes : |
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metrics[headers[0][:-1]] = dict(zip(headers, values)) |
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# record gauges |
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for ext, mnames in self.gauges.items(): |
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if ext not in metrics: |
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self.log.warn("netstat: unknown extension: {0}".format(ext)) |
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del self.gauges[ext] |
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continue |
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values = metrics[ext] |
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for mname in mnames: |
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if mname in values: |
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mstr = "{0}.{1}".format(ext, mname) |
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result.add(plumd.Int(mstr, values[mname])) |
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else: |
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self.log.warn("netstat: unknown metric {0}".format(mname)) |
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self.gauges[ext].remove(mname) |
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# record rates |
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for ext, mnames in self.rates.items(): |
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if ext not in metrics: |
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self.log.warn("netstat: unknown extension: {0}".format(ext)) |
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del self.rates[ext] |
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continue |
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values = metrics[ext] |
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for mname in mnames: |
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if mname in values: |
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mstr = "{0}.{1}".format(ext, mname) |
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mval = self.calc.per_second(mstr, float(values[mname]), ts) |
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result.add(plumd.Float(mstr, mval)) |
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else: |
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self.log.warn("netstat: unknown metric {0}".format(mname)) |
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self.rates[ext].remove(mname) |
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return [result] |
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s4z /
plumd
