Pysnmp：nextCmd() 为扩展脚本产生许多结果

Question

以下代码用于模拟命令（在'server'上执行脚本）

snmpget server 'NET-SNMP-EXTEND-MIB::nsExtendOutputFull."queryMonitoring"'

代码如下：

from pysnmp.hlapi import *

for (errorIndication,
     errorStatus,
     errorIndex,
     varBinds) in nextCmd(
                        SnmpEngine(OctetString(hexValue='8000000001020304')),
                        UsmUserData(userName='x', authKey='x', privKey='x'),
                        UdpTransportTarget(('server', 161)),
                        ContextData(),
                        ObjectType(ObjectIdentity('NET-SNMP-EXTEND-MIB', 'nsExtendOutputFull', "queryMonitoring"))):

    if errorIndication:
        print(errorIndication)
        break
    elif errorStatus:
        print('%s at %s' % (errorStatus.prettyPrint(),
                            errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
        break
    else:
        for varBind in varBinds:
            print(' = '.join([x.prettyPrint() for x in varBind]))

这是问题所在：

代码上方的命令产生了预期的 279 个结果，看起来与此类似：

NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".275 = (275, u'14:01:39', u'webserver3', u'0.0')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".276 = (276, u'14:01:39', u'webserver2', u'0.0')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".277 = (277, u'14:01:40', u'webserver4', u'1.0')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".278 = (278, u'14:01:40', u'webserver1', u'76.5')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".279 = (279, u'14:01:40', u'webserver3', u'0.0')

python 脚本会从不同的 MIB 产生额外的输出：

...
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".274 = (274, u'14:01:39', u'webserver1', u'74.5')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".275 = (275, u'14:01:39', u'webserver3', u'0.0')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".276 = (276, u'14:01:39', u'webserver2', u'0.0')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".277 = (277, u'14:01:40', u'webserver4', u'1.0')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".278 = (278, u'14:01:40', u'webserver1', u'76.5')
NET-SNMP-EXTEND-MIB::nsExtendOutLine."queryMonitoring".279 = (279, u'14:01:40', u'webserver3', u'0.0')
NET-SNMP-AGENT-MIB::nsCacheDefaultTimeout.0 = 5
NET-SNMP-AGENT-MIB::nsCacheEnabled.0 = false
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.2.2 = 3
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.24.4 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.24.7 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.31.1 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.31.3 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.32 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.34 = 30
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.35 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.36 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.4.37 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.5 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.5.29 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.5.30 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.6 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.6.13 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.6.19 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.6.20 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.7 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.7.5 = 5
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.7.7 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.10.7.2 = 60
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.25.4.2 = 30
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.25.6.3 = 30
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.4.1.8072.1.31 = 5
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.2.2 = cached
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.24.4 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.24.7 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.31.1 = cached
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.31.3 = cached
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.32 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.34 = cached
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.35 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.36 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.4.37 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.5 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.5.29 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.5.30 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.6 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.6.13 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.6.19 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.6.20 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.7 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.7.5 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.7.7 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.10.7.2 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.25.4.2 = expired
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.2.1.25.6.3 = empty
NET-SNMP-AGENT-MIB::nsCacheStatus.1.3.6.1.4.1.8072.1.31 = expired
NET-SNMP-AGENT-MIB::nsDebugEnabled.0 = false
NET-SNMP-AGENT-MIB::nsDebugOutputAll.0 = false
NET-SNMP-AGENT-MIB::nsDebugDumpPdu.0 = false
NET-SNMP-AGENT-MIB::nsLogType.debug."/dev/null" = file
NET-SNMP-AGENT-MIB::nsLogType.debug."snmpd" = syslog
NET-SNMP-AGENT-MIB::nsLogMaxLevel.debug."/dev/null" = emergency
NET-SNMP-AGENT-MIB::nsLogMaxLevel.debug."snmpd" = emergency
NET-SNMP-AGENT-MIB::nsLogStatus.debug."/dev/null" = active
NET-SNMP-AGENT-MIB::nsLogStatus.debug."snmpd" = active
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.7.103.114.112.100.101.109.111.0.3.3.4.114.101.97.100 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.7.103.114.112.100.101.109.111.0.3.3.5.119.114.105.116.101 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.7.103.114.112.100.101.109.111.0.3.3.6.110.111.116.105.102.121 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.8.103.114.112.99.111.109.109.50.0.0.1.4.114.101.97.100 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.8.103.114.112.99.111.109.109.50.0.0.1.5.119.114.105.116.101 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.8.103.114.112.99.111.109.109.50.0.0.1.6.110.111.116.105.102.121 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.8.103.114.112.99.111.109.109.51.0.0.1.4.114.101.97.100 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.8.103.114.112.99.111.109.109.51.0.0.1.5.119.114.105.116.101 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.8.103.114.112.99.111.109.109.51.0.0.1.6.110.111.116.105.102.121 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.4.114.101.97.100 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.5.119.114.105.116.101 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.4.114.101.97.100 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.5.119.114.105.116.101 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.2.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = 2
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.7.103.114.112.100.101.109.111.0.3.3.4.114.101.97.100 = _all_
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.7.103.114.112.100.101.109.111.0.3.3.5.119.114.105.116.101 = _all_
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.7.103.114.112.100.101.109.111.0.3.3.6.110.111.116.105.102.121 = _all_
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.8.103.114.112.99.111.109.109.50.0.0.1.4.114.101.97.100 = all
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.8.103.114.112.99.111.109.109.50.0.0.1.5.119.114.105.116.101 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.8.103.114.112.99.111.109.109.50.0.0.1.6.110.111.116.105.102.121 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.8.103.114.112.99.111.109.109.51.0.0.1.4.114.101.97.100 = systemonly
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.8.103.114.112.99.111.109.109.51.0.0.1.5.119.114.105.116.101 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.8.103.114.112.99.111.109.109.51.0.0.1.6.110.111.116.105.102.121 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.4.114.101.97.100 = _all_
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.5.119.114.105.116.101 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.4.114.101.97.100 = _all_
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.5.119.114.105.116.101 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.3.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = none
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.7.103.114.112.100.101.109.111.0.3.3.4.114.101.97.100 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.7.103.114.112.100.101.109.111.0.3.3.5.119.114.105.116.101 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.7.103.114.112.100.101.109.111.0.3.3.6.110.111.116.105.102.121 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.8.103.114.112.99.111.109.109.50.0.0.1.4.114.101.97.100 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.8.103.114.112.99.111.109.109.50.0.0.1.5.119.114.105.116.101 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.8.103.114.112.99.111.109.109.50.0.0.1.6.110.111.116.105.102.121 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.8.103.114.112.99.111.109.109.51.0.0.1.4.114.101.97.100 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.8.103.114.112.99.111.109.109.51.0.0.1.5.119.114.105.116.101 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.8.103.114.112.99.111.109.109.51.0.0.1.6.110.111.116.105.102.121 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.4.114.101.97.100 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.5.119.114.105.116.101 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.4.114.101.97.100 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.5.119.114.105.116.101 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.4.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = 4
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.7.103.114.112.100.101.109.111.0.3.3.4.114.101.97.100 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.7.103.114.112.100.101.109.111.0.3.3.5.119.114.105.116.101 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.7.103.114.112.100.101.109.111.0.3.3.6.110.111.116.105.102.121 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.8.103.114.112.99.111.109.109.50.0.0.1.4.114.101.97.100 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.8.103.114.112.99.111.109.109.50.0.0.1.5.119.114.105.116.101 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.8.103.114.112.99.111.109.109.50.0.0.1.6.110.111.116.105.102.121 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.8.103.114.112.99.111.109.109.51.0.0.1.4.114.101.97.100 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.8.103.114.112.99.111.109.109.51.0.0.1.5.119.114.105.116.101 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.8.103.114.112.99.111.109.109.51.0.0.1.6.110.111.116.105.102.121 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.4.114.101.97.100 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.5.119.114.105.116.101 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.15.103.114.112.97.117.116.104.79.110.108.121.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.4.114.101.97.100 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.5.119.114.105.116.101 = 1
NET-SNMP-MIB::netSnmpObjects.9.1.1.5.15.103.114.112.105.110.116.101.114.110.97.108.85.115.101.114.0.3.2.6.110.111.116.105.102.121 = 1
SNMPv2-MIB::snmpSetSerialNo.0 = 1369298840
SNMP-FRAMEWORK-MIB::snmpEngineID.0 = 0x80001f88805e2e49072f68445700000000
SNMP-FRAMEWORK-MIB::snmpEngineBoots.0 = 255
SNMP-FRAMEWORK-MIB::snmpEngineTime.0 = 69821
SNMP-FRAMEWORK-MIB::snmpEngineMaxMessageSize.0 = 1500
SNMP-MPD-MIB::snmpUnknownSecurityModels.0 = 0
SNMP-MPD-MIB::snmpInvalidMsgs.0 = 0
SNMP-MPD-MIB::snmpUnknownPDUHandlers.0 = 0
SNMP-TARGET-MIB::snmpTargetSpinLock.0 = 0
SNMP-TARGET-MIB::snmpTargetAddrTDomain."internal0" = SNMPv2-TM::snmpUDPDomain
SNMP-TARGET-MIB::snmpTargetAddrTAddress."internal0" = 0x7f00000100a2
SNMP-TARGET-MIB::snmpTargetAddrTimeout."internal0" = 0
SNMP-TARGET-MIB::snmpTargetAddrRetryCount."internal0" = 0
SNMP-TARGET-MIB::snmpTargetAddrTagList."internal0" = internal0
...

关于如何将脚本输出限制为预期的 279 行有什么想法吗？

谢谢

Answer 1

nextCmd() 不是执行单个 snmpget 调用的正确函数。

我发现我必须使用 getCmd()

    for (errorIndication,
         errorStatus,
         errorIndex,
         varBinds) in getCmd(
                SnmpEngine(),
                            UsmUserData(userName='x', authKey='x', privKey='x'),
                            UdpTransportTarget(('server', 161)),
                            ContextData(),
                ObjectType(ObjectIdentity('x'))):
        if errorIndication:
            print(errorIndication)
            break
        elif errorStatus:
            print('%s at %s' % (errorStatus.prettyPrint(),
                                errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
            break
        else:
            for varBind in varBinds:

Pysnmp：nextCmd() 为扩展脚本产生许多结果

Pysnmp: nextCmd() yields to many results for extended script

python

linux

snmp

pysnmp