snmpd

SNMP监控一些常用OID的总结
CentOS开启snmpd
OIDs

SNMP监控一些常用OID的总结

CentOS开启snmpd

snmpd

# 安装
yum install -y net-snmp

# 配置: /etc/snmp/snmpd.conf
# v2c验证方式
# rocommunity mytestsnmpd
# rocommunity : 只读访问权限
# mytestsnmpd : v2c的帐号
# 后面的IP表示授权访问的IP

# v3验证方式
# 注意:
# 1.密码要8个字节以上，否则会失败。
# 2.由于安全的原因，snmpd启动后，以上两行会被删除，其内容以密文的形式记录在其它文件中。
# rouser myuser auth               # 设定只读帐号类型，auth指明连接时需要验证
# createUser myuser MD5 mypassword # 创建一个名为mytest的用户，密码为mypassword，并用MD5进行加密传输
cat >> /etc/snmp/snmpd.conf <<EOF
rocommunity mysnmpd
rouser myuser auth
createUser myuser MD5 mypassword
EOF

# 取消默认community:public、删除rocomnunity
sed -i -e 's/^com2sec /#&/g' -e 's/^rocommunity/#&/g' -e '/^# My CONFIG START/,/^# My CONFIG END/d' /etc/snmp/snmpd.conf
#增加mytestsnmpd授权(com2sec中的source默认是default 可以根据需要访问的主机IP做限制)
cat >> /etc/snmp/snmpd.conf <<EOF
# My CONFIG START
com2sec  myuser       default       mysnmpd
group    myGroup      v1            myuser
group    myGroup      v2c           myuser
view     myview       included      .1.3.6.1.2.1
view     myview       included      .1.3.6.1.4.1
access   myGroup      ""       any        noauth     exact   myview   none   none
# My CONFIG END
EOF

# 启动
service snmpd restart
chkconfig snmpd on

安装snmpwalk

# CentOS
yum install net-snmp-utils
# Ubuntu
apt-get install snmp

OIDs

磁盘卷列表

从iso.3.6.1.4.1.2021.9.1.2.1开始，最后一位+1递增，直到返回:No Such Instance currently exists at this OID

snmpwalk -v2c -c public localhost iso.3.6.1.4.1.2021.9.1.2.1
iso.3.6.1.4.1.2021.9.1.2.1 = STRING: "/"

snmpwalk -v2c -c public localhost iso.3.6.1.4.1.2021.9.1.2.25
iso.3.6.1.4.1.2021.9.1.2.25 = No Such Instance currently exists at this OID

Ubnutu启用mibs

修改/etc/snmp/snmp.conf，注释mibs:这一行。

Debian missing MIBs for SNMP

For error such as:
Cannot find module (HOST-RESOURCES-MIB): At line 0 in (none)
Cannot find module (HOST-RESOURCES-TYPES): At line 0 in (none)
Cannot find module (SNMPv2-TC): At line 10 in /usr/share/mibs/netsnmp/UCD-DLMOD-MIB
Cannot find module (SNMPv2-SMI): At line 34 in /usr/share/mibs/netsnmp/UCD-SNMP-MIB
Cannot find module (SNMPv2-TC): At line 37 in /usr/share/mibs/netsnmp/UCD-SNMP-MIB
Did not find ‘enterprises’ in module #-1 (/usr/share/mibs/netsnmp/UCD-SNMP-MIB)
Did not find ‘DisplayString’ in module #-1 (/usr/share/mibs/netsnmp/UCD-SNMP-MIB)
Did not find ‘TruthValue’ in module #-1 (/usr/share/mibs/netsnmp/UCD-SNMP-MIB)
Unlinked OID in UCD-SNMP-MIB: ucdavis ::= { enterprises 2021 }
Undefined identifier: enterprises near line 39 of /usr/share/mibs/netsnmp/UCD-SNMP-MIB
Did not find ‘DisplayString’ in module #-1 (/usr/share/mibs/netsnmp/UCD-DLMOD-MIB)
Did not find ‘ucdExperimental’ in module UCD-SNMP-MIB (/usr/share/mibs/netsnmp/UCD-DLMOD-MIB)
Unlinked OID in UCD-DLMOD-MIB: ucdDlmodMIB ::= { ucdExperimental 14 }

apt-get install snmp-mibs-downloader

Please note that the second, snmp-mibs-downloader is not free so in order to install it you need to modify your /etc/apt/sources.list to include non-free packages.

Then run download-mibs

snmpwalk -Os -c public -v 1 localhost system

# 以下为查询同一内容:dskPath
snmpwalk -v2c -c public localhost iso.3.6.1.4.1.2021.9.1.2
snmpwalk -v2c -c public localhost 1.3.6.1.4.1.2021.9.1.2
snmpwalk -v2c -c public localhost UCD-SNMP-MIB::dskPath

OID-MIB查询

# snmptranslate 这个命令可以用来查看映射关系
snmptranslate .1.3.6.1.2.1.1.3.0
SNMPv2-MIB::sysUpTime.0

snmptranslate -On SNMPv2-MIB::system.sysUpTime.0
.1.3.6.1.2.1.1.3.0