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Configuration on Proxmox Host

Install snmpd

apt install snmpd

Configure snmpd

Edit /etc/snmp/snmpd.conf

nano /etc/snmp/snmpd.conf

Add basic configuration

#Listen on all interfaces, IPv4 only
agentAddress udp:161
#ACCESS CONTROL
view   all  included   .1.3.6.1.2.1.1
view   all  included   .1.3.6.1.2.1.25.1
#SNMP v2 (Read only) with community "public" restricted to Network 
#Please change IP 192.168.1.0/24 to your Network.
rocommunity public 192.168.1.0/24
sysLocation    YourCity
sysContact     YourName
#Run as root
agentuser  root
#Add commands
pass .1.3.6.1.2.1.25.1.8 /bin/sh /root/snmp-cpu-temp.sh
pass .1.3.6.1.2.1.25.1.9 /bin/sh /root/snmp-lvm-used.sh
pass .1.3.6.1.2.1.25.1.10 /bin/sh /root/snmp-smart-status.sh

Restart SNMPD

systemctl restart snmpd.service

Configuration on PRTG WebUI

CPU temperature

  • Add sensor
  • SNMP Custom
  • Name = CPU Temp
  • OID = .1.3.6.1.2.1.25.1.8
  • Channel Name = Temperature
  • Unit String = °C

LVM used

  • Add sensor
  • SNMP Custom
  • Name = LVM allocated pool data
  • OID = .1.3.6.1.2.1.25.1.9
  • Channel Name = LVM used
  • Unit String = %

SMART status

  • Add sensor
  • SNMP Custom String
  • Name = SMART status
  • OID = .1.3.6.1.2.1.25.1.10
  • Response Must Include (Down Status) = PASSED
  • Response Must Include (Warning Status) = PASSED

PRTG

Known issues

Recently debian added the user "Debian-snmp" to the snmp.service but for SMART/LVM Status we need the root user.

edit snmpd.service and replace "Debian-snmp" with "root"

nano /lib/systemd/system/snmpd.service

From
...
ExecStart=/usr/sbin/snmpd -Lsd -Lf /dev/null -u Debian-snmp -g Debian-snmp -I -smux,mteTrigger,mteTriggerConf -f -p /run/snmpd.pid
...
To
...
ExecStart=/usr/sbin/snmpd -Lsd -Lf /dev/null -u root -g Debian-snmp -I -smux,mteTrigger,mteTriggerConf -f -p /run/snmpd.pid
...