python 使用 pysnmp 采集 SNMP 数据

ゝ一世哀愁。 2022-10-22 09:08 355阅读 0赞

1.  带加密参数，超时时间，重试次数

from pysnmp.hlapi import UsmUserData, usmHMACSHAAuthProtocol, UdpTransportTarget, usmDESPrivProtocol, \
        usmAesCfb128Protocol
    
    from pysnmp.entity.rfc3413.oneliner import cmdgen
    
    
    def get_oid_value(username, auth_key, priv_key, host, oid):
        cg = cmdgen.CommandGenerator()
        iterator = cg.getCmd(
                          UsmUserData(username, auth_key, priv_key,
                                      usmHMACSHAAuthProtocol, usmAesCfb128Protocol),
                          UdpTransportTarget((host, 161), timeout=10, retries=1),
                          oid)
    
        errorIndication, errorStatus, errorIndex, varBinds = iterator
    
        if errorIndication:  # SNMP engine errors
            print("errorIndication", errorIndication)
        else:
            if errorStatus:  # SNMP agent errors
                print('%s at %s' % (errorStatus.prettyPrint(), varBinds[int(errorIndex)-1] if errorIndex else '?'))
            else:
    
                for varBind in varBinds:  # SNMP response contents
                    print([x.prettyPrint() for x in varBind])
                print(varBinds[0][1])
                return varBinds[0][1]

1.  无加密，简单版本

from pysnmp.entity.rfc3413.oneliner import cmdgen
    
    cmdGen = cmdgen.CommandGenerator()
    
    errorIndication, errorStatus, errorIndex, varBinds = cmdGen.getCmd(
        cmdgen.CommunityData('public'),
        cmdgen.UdpTransportTarget(('localhost', 161)),
        '1.3.6.1.2.1.1.1.0',
        '1.3.6.1.2.1.1.6.0'
    )
    
    # Check for errors and print out results
    if errorIndication:
        print(errorIndication)
    else:
        if errorStatus:
            print('%s at %s' % (
                errorStatus.prettyPrint(),
                errorIndex and varBinds[int(errorIndex)-1] or '?'
                )
            )
        else:
            for name, val in varBinds:
                print('%s = %s' % (name.prettyPrint(), val.prettyPrint()))

1.  pysnmp 参数文档

http://ports.gnu-darwin.org/net-mgmt/py-snmp4/work/pysnmp-4.1.7a/docs/pysnmp-tutorial.html#UsmUserData
    # 源码中注释比较详细，可直接参看源码中注释