一、编译安装
1、下载net-snmp-5.7.3.tar.gz压缩包并上传至linux
2、tar -xzvf net-snmp-5.7.3.tar.gz 解压
3、进入net-snmp-5.7.3目录，运行./configure进行配置安装环境
--prefix=/usr/local/snmp 设置安装位置为/usr/local/snmp/
--with-mib-modules=myModule 载入自定义的mib库
4、make 命令（make需要安装perl库环境）
5、make install 命令
#检测安装是否成功
[root@zbx-agent01 net-snmp-5.7.3]# cd /usr/local/snmp/sbin
[root@zbx-agent01 sbin]# ls
snmpd snmptrapd
[root@zbx-agent01 sbin]# ./snmpd -v
NET-SNMP version: 5.7.3
Web: http://www.net-snmp.org/
Email: net-snmp-coders@lists.sourceforge.net6、将net-snmp目录下的EXAMPLE.conf复制到/usr/local/snmp/share/snmp/下，并改名为snmpd.conf
#修snmpd.conf文件
# sec.name source community
com2sec notConfigUser default public
# groupName securityModel securityName
group notConfigGroup v1 notConfigUser
group notConfigGroup v2c notConfigUser
# name incl/excl subtree mask(optional)
view all included .1
# group context sec.model sec.level prefix read write notif
access notConfigGroup "" any noauth exact all none none7、启动snmpd服务
/usr/local/snmp/sbin/snmpd -c /usr/local/snmp/etc/snmpd.conf8、测试
cd /usr/local/snmp/bin
./snmpget -v 1 -c public localhost sysUpTime.0
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (188447) 0:31:24.47二、YUM安装
1、安装
yum install -y net-snmp net-snmp-utils net-snmp-perl2、配置，具体参考编译方式的配置文件
3、启动并验证snmp
systemctl start snmpd
systemctl enable snmpd三、加载自定义MIB库
1、使用MIB builder生成MIB文件TEST-MIB.my
--
-- TEST-MIB2.txt
-- MIB generated by MG-SOFT Visual MIB Builder Version 6.0 Build 88
-- Tuesday, April 14, 2020 at 16:21:12
--
TEST-MIB2 DEFINITIONS ::= BEGIN
IMPORTS
OBJECT-GROUP
FROM SNMPv2-CONF
enterprises, Integer32, OBJECT-TYPE, MODULE-IDENTITY
FROM SNMPv2-SMI;
-- 1.3.6.1.4.1.1
monitorSystem MODULE-IDENTITY
LAST-UPDATED "202004141615Z" -- April 14, 2020 at 16:15 GMT
ORGANIZATION
"Organization."
CONTACT-INFO
"Contact-info."
DESCRIPTION
"Description."
::= { enterprises 1 }
--
-- Node definitions
--
-- 1.3.6.1.4.1.1.1
cabinet1 OBJECT IDENTIFIER ::= { monitorSystem 1 }
-- 1.3.6.1.4.1.1.1.1
mainVoltage OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"mainVoltage"
::= { cabinet1 1 }
subVoltage OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"subVoltage"
::= { cabinet1 2 }
END
--
-- TEST-MIB2.txt
--2、将生成的文件放到/usr/local/snmp/share/snmp/mibs/目录下，使用/usr/local/snmp/bin/snmptranslate -Tp -IR TEST-MIB2::monitorSystem 查看MIB文件是否正常，并显示节点树
3、执行命令
env MIBS="+/usr/local/snmp/share/snmp/mibs/TES-MIB.my" /usr/local/snmp/bin/mib2c -c mib2c.scalar.conf TEST-MIB2::monitorSystem在/usr/local/snmp/bin/mib2c下生成monitorSystem.c和monitorSystem.h
4、将monitorSystem.c文件补充完整
/*
* Note: this file originally auto-generated by mib2c using
* $
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "monitorSystem.h"
/** Initializes the monitorSystem module */
void
init_monitorSystem(void)
{
const oid mainVoltage_oid[] = { 1,3,6,1,4,1,1,1,1 };
const oid subVoltage_oid[] = { 1,3,6,1,4,1,1,1,2 };
DEBUGMSGTL(("monitorSystem", "Initializing\n"));
netsnmp_register_scalar(
netsnmp_create_handler_registration("mainVoltage", handle_mainVoltage,
mainVoltage_oid, OID_LENGTH(mainVoltage_oid),
HANDLER_CAN_RWRITE
));
netsnmp_register_scalar(
netsnmp_create_handler_registration("subVoltage", handle_subVoltage,
subVoltage_oid, OID_LENGTH(subVoltage_oid),
HANDLER_CAN_RWRITE
));
}
int
handle_mainVoltage(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
int ret;
/* We are never called for a GETNEXT if it's registered as a
"instance", as it's "magically" handled for us. */
/* a instance handler also only hands us one request at a time, so
we don't need to loop over a list of requests; we'll only get one. */
static int mainVoltageValue;
switch(reqinfo->mode) {
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_INTEGER,
&mainVoltageValue/* XXX: a pointer to the scalar's data */,
4/* XXX: the length of the data in bytes */);
break;
/*
* SET REQUEST
*
* multiple states in the transaction. See:
* http://www.net-snmp.org/tutorial-5/toolkit/mib_module/set-actions.jpg
*/
case MODE_SET_RESERVE1:
/* or you could use netsnmp_check_vb_type_and_size instead */
ret = netsnmp_check_vb_type(requests->requestvb, ASN_INTEGER);
if ( ret != SNMP_ERR_NOERROR ) {
netsnmp_set_request_error(reqinfo, requests, ret );
}
break;
case MODE_SET_RESERVE2:
/* XXX malloc "undo" storage buffer */
if (0/* XXX if malloc, or whatever, failed: */) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_RESOURCEUNAVAILABLE);
}
break;
case MODE_SET_FREE:
/* XXX: free resources allocated in RESERVE1 and/or
RESERVE2. Something failed somewhere, and the states
below won't be called. */
break;
case MODE_SET_ACTION:
/* XXX: perform the value change here */
if (0/* XXX: error? */) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_BADVALUE/* some error */);
}
break;
case MODE_SET_COMMIT:
/* XXX: delete temporary storage */
mainVoltageValue = *requests->requestvb->val.integer;
if (0/* XXX: error? */) {
/* try _really_really_ hard to never get to this point */
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_COMMITFAILED);
}
break;
case MODE_SET_UNDO:
/* XXX: UNDO and return to previous value for the object */
if (0/* XXX: error? */) {
/* try _really_really_ hard to never get to this point */
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_UNDOFAILED);
}
break;
default:
/* we should never get here, so this is a really bad error */
snmp_log(LOG_ERR, "unknown mode (%d) in handle_mainVoltage\n", reqinfo->mode );
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}
int
handle_subVoltage(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
int ret;
static int subVoltageValue;
/* We are never called for a GETNEXT if it's registered as a
"instance", as it's "magically" handled for us. */
/* a instance handler also only hands us one request at a time, so
we don't need to loop over a list of requests; we'll only get one. */
switch(reqinfo->mode) {
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_INTEGER,
&subVoltageValue/* XXX: a pointer to the scalar's data */,
4/* XXX: the length of the data in bytes */);
break;
/*
* SET REQUEST
*
* multiple states in the transaction. See:
* http://www.net-snmp.org/tutorial-5/toolkit/mib_module/set-actions.jpg
*/
case MODE_SET_RESERVE1:
/* or you could use netsnmp_check_vb_type_and_size instead */
ret = netsnmp_check_vb_type(requests->requestvb, ASN_INTEGER);
if ( ret != SNMP_ERR_NOERROR ) {
netsnmp_set_request_error(reqinfo, requests, ret );
}
break;
case MODE_SET_RESERVE2:
/* XXX malloc "undo" storage buffer */
if (0/* XXX if malloc, or whatever, failed: */) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_RESOURCEUNAVAILABLE);
}
break;
case MODE_SET_FREE:
/* XXX: free resources allocated in RESERVE1 and/or
RESERVE2. Something failed somewhere, and the states
below won't be called. */
break;
case MODE_SET_ACTION:
/* XXX: perform the value change here */
if (0/* XXX: error? */) {
netsnmp_set_request_error(reqinfo, requests,SNMP_ERR_BADVALUE /* some error */);
}
break;
case MODE_SET_COMMIT:
/* XXX: delete temporary storage */
subVoltageValue =*requests->requestvb->val.integer;
if (0/* XXX: error? */) {
/* try _really_really_ hard to never get to this point */
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_COMMITFAILED);
}
break;
case MODE_SET_UNDO:
/* XXX: UNDO and return to previous value for the object */
if (0/* XXX: error? */) {
/* try _really_really_ hard to never get to this point */
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_UNDOFAILED);
}
break;
default:
/* we should never get here, so this is a really bad error */
snmp_log(LOG_ERR, "unknown mode (%d) in handle_subVoltage\n", reqinfo->mode );
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}5、将monitorSystem.c和monitorSystem.h文件放至/root/net-snmp-5.7.3/agent/mibgroup/目录下
6、将net-snmp-5.7.3重新编译
./configure --prefix=/usr/local/snmp --with-mib-modules=monitorSystem
make
make intall7、重新编译前需将snmpd服务停止
8、使用snmpget获取值、使用snmpset设置值
#获取值
/usr/local/snmp/bin/snmpget -c public -v2c localhost 1.3.6.1.4.1.1.1.1.0
#设置为200
/usr/local/snmp/bin/snmpset -c private -v2c localhost 1.3.6.1.4.1.1.1.2.0 i 200
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