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# -*- coding: utf-8 -*- |
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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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import time |
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from collections import deque |
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import plumd |
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import plumd.plugins |
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from plumd.calc import Differential |
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from plumd.util import get_file_list, Filter |
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class Netstat(plumd.plugins.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_record': { |
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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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} |
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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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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 |
def check(self): |
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"""Return detailed network statitistics proc file net/netstat. |
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Note: add entries to the configuration value 'proc_netstat_record' |
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to record them. See /proc/net/netstat for a list of available metrics. |
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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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record = self.config.get('proc_netstat_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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try: |
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dat = f.read().strip().split("\n") |
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except Exception as e: |
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self.log.error("failed to read {0}".format(self.proc_file)) |
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return result |
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# timestamp for Differential calculations |
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ts = time.time() |
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# should always have a header row and value row, ie. divisible by 2 |
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if len(dat) % 2 != 0: |
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self.log.error("netstat: cannot parse {0}".format(self.proc_file)) |
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return result |
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# split values into lists |
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dlist = deque() |
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for entry in dat: |
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dlist.append(entry.split()) |
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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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# now, we have a list of items to record, just need to record them |
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for ext, mnames in record.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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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, int(values[mname]), ts) |
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result.add(plumd.Int(mstr, mval)) |
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else: |
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self.log.warn("netstat: unknown metric {0}".format(mname)) |
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return [result] |
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s4z /
plumd
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