zabbix snmp监控
环境:
CentOS 7.2
net-snamp-5.7.2
zabbix安装配置请参看
一.安装配置net-snmp服务
1.安装
yum -y install net-snmp net-snmp-utils
2.配置
主配置文件/etc/snmp/snmpd.conf
sed -i '/.1.3.6.1.2.1.25.1.1/i view
systemview
included .1 '
/etc/snmp/snmpd.conf
sed -i '/proc mountd/s/^#//' /etc/snmp/snmpd.conf
sed -i '/proc ntalkd 4/s/^#//'
/etc/snmp/snmpd.conf
sed -i '/proc sendmail 10 1/s/^#//'
/etc/snmp/snmpd.conf
sed -i '/disk / 10000/s/^#//'
/etc/snmp/snmpd.conf
sed -i '/load 12 14 14/s/^#//'
/etc/snmp/snmpd.conf
3.启动
systemctl start snmpd
root@router:~#netstat -tunlp|grep snmpd
tcp
0
0 127.0.0.1:199
0.0.0.0:*
LISTEN
33170/snmpd
udp
0
0 0.0.0.0:161
0.0.0.0:*
33170/snmpd
二.测试snmp
root@router:~#snmpwalk -c public -v 2c 192.168.8.254
sysName
SNMPv2-MIB::sysName.0 = STRING: router.example.com
root@router:~#snmpwalk -c public -v 2c 192.168.8.254
.1.3.6.1.2.1.1.5
SNMPv2-MIB::sysName.0 = STRING: router.example.com
root@router:~#snmpwalk -c public -v 2c 192.168.8.254
.1.3.6.1.4.1.2021.4.11
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 4337288 kB
root@router:~#snmpwalk -c public -v 2c 192.168.8.254
memTotalFree
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 4337012 kB
三.snmpv3加密
1.停snmpd
systemctl stop snmpd
提示:只有停止snmpd后/var/lib/net-snmp/snmpd.conf在创建用户时才能添加成功
2.创建加密认证用户
root@router:~#net-snmp-config --create-snmpv3-user -ro -a
snmpsecret -x DES -X snmpsecret_des secure_user
adding the following line to
/var/lib/net-snmp/snmpd.conf:
adding the following line to /etc/snmp/snmpd.conf:
secure_user
#用户名
secret
#md5密码,至少8位
secret_des
#des密码
3.启动snmpd
systemctl start snmpd
四.snmpv3认证(noAuthNoPriv|authNoPriv|authPriv)
1.noAuthNoPriv安全级别
root@router:~#snmpwalk -v 2c -c public 127.0.0.1
.1.3.6.1.4.1.2021.4.11
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 4298672 kB
2.authNoPriv安全级别
root@router:~#snmpwalk -v 3 -u secure_user -a MD5 -A
snmpsecret -l AuthNoPriv 192.168.8.254 sysName
SNMPv2-MIB::sysName.0 = STRING: router.example.com
3.authPriv安全级别
root@router:~#snmpwalk -v 3 -u secure_user -a MD5 -A
snmpsecret -x DES -X snmpsecret_des -l authPriv 192.168.8.254
memTotalFree
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 4317580 kB
五.启用zabbix
snmp监控
1.启用snmp接口
2.创建snmp监控项
提示:在模板中创建监控项可以避免重复配置
SNMPv3
说明:Units采用网络通用单位Byte,
1024Byte正好是1KB
成功启用后，SNMP的图标会变绿
创建Graph
补充:
可以自定义一个OID，并重定向到外部脚本来监控服务项，这里监控80端口连接数
1.脚本
root@router:~#cat
/root/http_connections.sh
#!/bin/bash
nginxNum=$(ss -t -o state all sport = :80|wc -l)
echo $nginxNum
2.定义OID
root@router:~#snmpwalk -v 2c -c public 127.0.0.1
.1.3.6.1.4.1.2021.5000
UCD-SNMP-MIB::ucdavis.5000 = No Such Object available on this
agent at this OID
添加一个不存在的OID
echo "extend
.1.3.6.1.4.1.2021.5000 http_connections /root/http_connections.sh"
>>/etc/snmp/snmpd.conf
systemctl restart snmpd
3.测试
root@router:~#snmpwalk -v 2c -c
public 127.0.0.1 .1.3.6.1.4.1.2021.5000
UCD-SNMP-MIB::ucdavis.5000.1.0
= INTEGER: 1
UCD-SNMP-MIB::ucdavis.5000.2.1.2.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= STRING: "/root/http_connections.sh"
UCD-SNMP-MIB::ucdavis.5000.2.1.3.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= ""
UCD-SNMP-MIB::ucdavis.5000.2.1.4.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= ""
UCD-SNMP-MIB::ucdavis.5000.2.1.5.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= INTEGER: 5
UCD-SNMP-MIB::ucdavis.5000.2.1.6.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= INTEGER: 1
UCD-SNMP-MIB::ucdavis.5000.2.1.7.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= INTEGER: 1
UCD-SNMP-MIB::ucdavis.5000.2.1.20.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= INTEGER: 4
UCD-SNMP-MIB::ucdavis.5000.2.1.21.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= INTEGER: 1
UCD-SNMP-MIB::ucdavis.5000.3.1.1.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= STRING: "4"
UCD-SNMP-MIB::ucdavis.5000.3.1.2.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= STRING: "4"
UCD-SNMP-MIB::ucdavis.5000.3.1.3.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= INTEGER: 1
UCD-SNMP-MIB::ucdavis.5000.3.1.4.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115
= INTEGER: 0
UCD-SNMP-MIB::ucdavis.5000.4.1.2.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115.1
= STRING: "4"
4.创建对应item
OID: .1.3.6.1.4.1.2021.5000.4.1.2.16.104.116.116.112.95.99.111.110.110.101.99.116.105.111.110.115.1