Ubuntu配置snmp服务新版

比眉伴天荒 2024-03-27 10:00 59阅读 0赞

背景：学校里要对机房的所有服务器用摩卡软件进行监控，所以要在所有的服务器上安装和配置SNMP协议。

动机：我参考网上很多资料安装和配置SNMP，没搞定，于是自己研究了一下如何配置，最终顺利完成，所以分享一下。

1. SNMP安装

运行如下两个命令

apt-get install snmp

apt-get install snmpd

顺利运行完毕，使用如下命令测试一下

root@Ouc:~\# lsof -i:161

如果输出了正在运行snmp协议，便说明安装OK。

![p194-001][]

2. SNMP配置(重点)

我的SNMP配置文件/etc/snmp/snmpd.conf与网上早年的一些资料不同，主要是 压根没有出现com2sec，下面附上我的snmpd.conf的前半部分：

———————————–下面是snmpd.conf———————————

\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
\#  
\# EXAMPLE.conf:  
\# An example configuration file for configuring the Net-SNMP agent (‘snmpd’)  
\# See the ‘snmpd.conf(5)’ man page for details  
\#  
\# Some entries are deliberately commented out, and will need to be explicitly activated  
\#  
\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
\#  
\# AGENT BEHAVIOUR  
\#

\# Listen for connections from the local system only  
\#agentAddress udp:127.0.0.1:161  
\# Listen for connections on all interfaces (both IPv4 \*and\* IPv6)  
agentAddress udp:161,udp6:\[::1\]:161

\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
\#  
\# SNMPv3 AUTHENTICATION  
\#  
\# Note that these particular settings don’t actually belong here.  
\# They should be copied to the file /var/lib/snmp/snmpd.conf  
\# and the passwords changed, before being uncommented in that file \*only\*.  
\# Then restart the agent

\# createUser authOnlyUser MD5 “remember to change this password”  
\# createUser authPrivUser SHA “remember to change this one too” DES  
\# createUser internalUser MD5 “this is only ever used internally, but still change the password”

\# If you also change the usernames (which might be sensible),

\# then remember to update the other occurances in this example config file to match.

\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
\#  
\# ACCESS CONTROL  
\#

\# system + hrSystem groups only  
view systemonly included .1.3.6.1.2.1.1  
view systemonly included .1.3.6.1.2.1.25.1  
view systemonly included .1 80  
\# Full access from the local host  
\#rocommunity public localhost  
\# Default access to basic system info  
rocommunity public default -V systemonly

\# Full access from an example network  
\# Adjust this network address to match your local  
\# settings, change the community string,  
\# and check the ‘agentAddress’ setting above  
\#rocommunity secret 10.0.0.0/16

\# Full read-only access for SNMPv3  
rouser authOnlyUser  
\# Full write access for encrypted requests  
\# Remember to activate the ‘createUser’ lines above  
\#rwuser authPrivUser priv

\# It’s no longer typically necessary to use the full ‘com2sec/group/access’ configuration  
\# r\[ou\]user and r\[ow\]community, together with suitable views, should cover most requirements

———————————–上面是snmpd.conf———————————

我的目的是进行远程SNMP连接，所以需要做如下的修改：

root@Ouc:~\# vim /etc/snmp/snmpd.conf

将下面这一行

agentAddress udp:127.0.0.1:161

注释掉，即

\\\#agentAddress udp:127.0.0.1:161

然后将原来的这一行

\\\#agentAddress udp:161,udp6:\[::1\]:161

去掉注释，即

agentAddress udp:161,udp6:\\\[::1\\\]:161

这样便可以实现snmp的远程监听了。

但修改后cacti服务器还是无法监测到CPU、内存、流量的数据，所以需要再做如下修改：

在snmpd.conf中找到下面的内容 view systemonly included .1.3.6.1.2.1.1 view systemonly included .1.3.6.1.2.1.25.1在下面加上一行 view systemonly included .1 80 这样就允许监听所有设备了。

完成所有修改后，重启snmp

root@Ouc:~\# service snmpd restart

本地测试SNMP是否监测各类指标的方法：运行如下命令

root@Ouc:~\# snmpwalk -v 2c -c public localhost

如果输出结果有好多页好多页，应该是设置成功了！

[p194-001]: