monitor the Memory and CPU of my ubuntu server with SNMP

[Vaibhav Ubale]

Hi ,
I want to monitor the Memory and CPU of my ubuntu server with SNMP but only getting uptime and some basic information.
Item for SNMP template attached shows the error "no such object against OID for Agent" for memory and CPU.
Can some expert help me with this

I have already installed the MIB downloader but no luck.

Thanks in advance.

Vaibhav

[ISiroshtan]

You need to allow the agent to provide data in OID trees needed for monitoring. I would start with simple test of adding

view systemonly included .1.3.6.1

After that restart snmpd and check again if data starts flowing in. If all works - you can then work on hardening allowed tree (if you really want/need to do it).

To explain:
In configuration

view systemonly included .1.3.6.1.2.1.1

you define "view" (a collection of OID trees that SNMP user using that view will be able to access) with the name "systemonly" to "include" (add to allowed to view trees) all oids that start with .1.3.6.1.2.1.1 .
Because OID requested by Zabbix starts with 1.3.6.1.4, it does not match any currently included trees. By allowing pretty high level OID .1.3.6.1 I hope it will include all you need to your monitoring

[vijayk]

Did you check with snmpwalk command? Does it returns the value?

[Vaibhav Ubale]

Hi Yes!!
I have checked the snmp walk and i dont see the OID in it ...

This is my snmpd.conf ...


sudo cat /etc/snmp/snmpd.conf |grep -v '^#\|^$'

[sudo] password for gargi:

sysLocation Sitting on the Dock of the Bay

sysContact Me <[email protected]>

sysServices 72

master agentx

agentaddress 192.168.0.110,127.0.0.1,[::1]

view systemonly included .1.3.6.1.2.1.1

view systemonly included .1.3.6.1.2.1.25.1

rocommunity Dpublic default -V systemonly

rouser authPrivUser authpriv -V systemonly

includeDir /etc/snmp/snmpd.conf.d


and
snmp walk out put is as below

snmpwalk -v2c -cDpublic 192.168.0.110

Timeout: No Response from 192.168.0.110

[root@pczbcl1 ~]# snmpwalk -v2c -cDpublic 192.168.0.110

SNMPv2-MIB::sysDescr.0 = STRING: Linux BlackJack 6.2.0-37-generic #38~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 2 18:01:13 UTC 2 x86_64

SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10

DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (574) 0:00:05.74

SNMPv2-MIB::sysContact.0 = STRING: Me <[email protected]>

SNMPv2-MIB::sysName.0 = STRING: BlackJack

SNMPv2-MIB::sysLocation.0 = STRING: Sitting on the Dock of the Bay

SNMPv2-MIB::sysServices.0 = INTEGER: 72

SNMPv2-MIB::sysORLastChange.0 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORID.1 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance

SNMPv2-MIB::sysORID.2 = OID: SNMP-MPD-MIB::snmpMPDCompliance

SNMPv2-MIB::sysORID.3 = OID: SNMP-USER-BASED-SM-MIB::usmMIBCompliance

SNMPv2-MIB::sysORID.4 = OID: SNMPv2-MIB::snmpMIB

SNMPv2-MIB::sysORID.5 = OID: SNMP-VIEW-BASED-ACM-MIB::vacmBasicGroup

SNMPv2-MIB::sysORID.6 = OID: TCP-MIB::tcpMIB

SNMPv2-MIB::sysORID.7 = OID: UDP-MIB::udpMIB

SNMPv2-MIB::sysORID.8 = OID: IP-MIB::ip

SNMPv2-MIB::sysORID.9 = OID: SNMP-NOTIFICATION-MIB::snmpNotifyFullCompliance

SNMPv2-MIB::sysORID.10 = OID: NOTIFICATION-LOG-MIB::notificationLogMIB

SNMPv2-MIB::sysORDescr.1 = STRING: The SNMP Management Architecture MIB.

SNMPv2-MIB::sysORDescr.2 = STRING: The MIB for Message Processing and Dispatching.

SNMPv2-MIB::sysORDescr.3 = STRING: The management information definitions for the SNMP User-based Security Model.

SNMPv2-MIB::sysORDescr.4 = STRING: The MIB module for SNMPv2 entities

SNMPv2-MIB::sysORDescr.5 = STRING: View-based Access Control Model for SNMP.

SNMPv2-MIB::sysORDescr.6 = STRING: The MIB module for managing TCP implementations

SNMPv2-MIB::sysORDescr.7 = STRING: The MIB module for managing UDP implementations

SNMPv2-MIB::sysORDescr.8 = STRING: The MIB module for managing IP and ICMP implementations

SNMPv2-MIB::sysORDescr.9 = STRING: The MIB modules for managing SNMP Notification, plus filtering.

SNMPv2-MIB::sysORDescr.10 = STRING: The MIB module for logging SNMP Notifications.

SNMPv2-MIB::sysORUpTime.1 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.2 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.3 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.4 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.5 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.6 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.7 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.8 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.9 = Timeticks: (0) 0:00:00.00

SNMPv2-MIB::sysORUpTime.10 = Timeticks: (0) 0:00:00.00

HOST-RESOURCES-MIB::hrSystemUptime.0 = Timeticks: (462507) 1:17:05.07

HOST-RESOURCES-MIB::hrSystemDate.0 = STRING: 2023-11-25,11:21:47.0,+5:30

HOST-RESOURCES-MIB::hrSystemInitialLoadDevice.0 = INTEGER: 393216

HOST-RESOURCES-MIB::hrSystemInitialLoadParameters.0 = STRING: "BOOT_IMAGE=/boot/vmlinuz-6.2.0-37-generic root=UUID=72cc58d1-7d2b-4993-b412-49b9460f5031 ro quiet splash vt.handoff=7

"

HOST-RESOURCES-MIB::hrSystemNumUsers.0 = Gauge32: 2

HOST-RESOURCES-MIB::hrSystemProcesses.0 = Gauge32: 282

HOST-RESOURCES-MIB::hrSystemMaxProcesses.0 = INTEGER: 0

HOST-RESOURCES-MIB::hrSystemMaxProcesses.0 = No more variables left in this MIB View (It is past the end of the MIB tree)







Error I am getting




and OID which is missing

[vijayk]

Did you check this link?
https://techexpert.tips/zabbix/zabbi...ux-using-snmp/

[Vaibhav Ubale]

Hi Thanks for your quick reply . Only diffrencei could spot is the "Template OS LINUX SNMPv2" vs "Template OS LINUX SNMP" that I have used.
I am unable to find this Template OS LINUX SNMPv2 in my templates. I will try to find and assigne.

[vijayk]

Might be OID is different. I'm not sure for that.

[vijayk]

Try this tool. It will help you to browse the correct OID.

https://iphostmonitor.com/

[ISiroshtan]

In your config snmpd.conf on Ubuntu you limit the OID trees exposed

view systemonly included .1.3.6.1.2.1.1
view systemonly included .1.3.6.1.2.1.25.1

Then from Zabbix you try to request 1.3.6.1.4.1.2021.11.66.0 (from screenshot) which is outside of allowed trees. As SNMP Agent on your Ubuntu does not expose said tree it replies to Zabbix with info that no such oid exist.

Fix permissions from Ubuntu side and all should work fine.

[Vaibhav Ubale]

Thanks @vijayk and @ISiroshtan for your reply ,

@ISiroshtan, so i need to allow other tree's in my snmpd.conf . is that right or should i remove systemonly?
I will try to find and fix this. Thanks .

[ISiroshtan]

You need to allow the agent to provide data in OID trees needed for monitoring. I would start with simple test of adding

view systemonly included .1.3.6.1

After that restart snmpd and check again if data starts flowing in. If all works - you can then work on hardening allowed tree (if you really want/need to do it).

To explain:
In configuration

view systemonly included .1.3.6.1.2.1.1

you define "view" (a collection of OID trees that SNMP user using that view will be able to access) with the name "systemonly" to "include" (add to allowed to view trees) all oids that start with .1.3.6.1.2.1.1 .
Because OID requested by Zabbix starts with 1.3.6.1.4, it does not match any currently included trees. By allowing pretty high level OID .1.3.6.1 I hope it will include all you need to your monitoring