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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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## todo: switch from list with pop(0) to deque |
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class NetSnmp(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_netsnmp_record': { |
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'Ip': [ 'Forwarding', 'InReceives', 'InHdrErrors', 'InAddrErrors', |
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'ForwDatagrams', 'InUnknownProtos', 'InDiscards', |
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'InDelivers', 'OutRequests', 'OutDiscards', |
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'ReasmTimeout', 'ReasmReqds', 'ReasmOKs', 'ReasmFails', |
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'FragOKs', 'FragFails', 'FragCreates' ], |
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'Icmp': [ 'InMsgs','InErrors', 'InCsumErrors', 'InDestUnreachs', |
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'InTimeExcds', 'InParmProbs', 'InSrcQuenchs', |
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'InRedirects', 'InEchos', 'InEchoReps', 'OutMsgs', |
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'OutErrors', 'OutDestUnreachs', 'OutTimeExcds', |
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'OutParmProbs', 'OutSrcQuenchs', 'OutRedirects', |
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'OutEchos', 'OutEchoReps' ], |
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'IcmpMsg': [ 'OutType3' ], |
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'Tcp': [ 'MaxConn', 'ActiveOpens', 'PassiveOpens', 'AttemptFails', |
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'EstabResets', 'CurrEstab', 'InSegs', 'OutSegs', |
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'RetransSegs', 'InErrs', 'OutRsts', 'InCsumErrors' ], |
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'Udp': [ 'InDatagrams', 'NoPorts', 'InErrors', 'OutDatagrams', |
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'RcvbufErrors', 'SndbufErrors', 'InCsumErrors' ] |
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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(NetSnmp, self).__init__(log, config) |
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self.config.defaults(NetSnmp.defaults) |
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self.calc = Differential() |
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self.proc_file = "{0}/net/snmp".format(config.get('proc_path')) |
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self.filter = Filter() |
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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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View Code Duplication |
def check(self): |
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"""Return network protocol metrics from proc file net/snmp. |
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Add entries to the configuration value 'skip_proc_net_snmp' to skip |
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metrics. |
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Add entries to the configuration value 'net_snmp_items' to match the |
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format/order of the proc file net/snmp entries on the system. |
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:rtype: plumd.Result |
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""" |
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record = self.config.get('proc_netsnmp_record') |
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result = plumd.Result("net_snmp") |
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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("netsnmp: 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 proto, mnames in record.items(): |
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if proto not in metrics: |
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self.log.warn("netsnmp: unknown protocol: {0}".format(proto)) |
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continue |
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values = metrics[proto] |
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for mname in mnames: |
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if mname in values: |
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mstr = "{0}.{1}".format(proto, 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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