snmp not showing memory cpu disk

Hi,

I'm running ESXi 6.5 and using SNMPv2c. I'm trying to monitor my hosts with Nagios using SNMP but I'm not getting the information I need. What I'd like to monitor is the CPU usage, Memory usage, Disk usage, of the host (not the VMs running on the host). SNMP is enabled and the firewall rules allow it, I can get some data from SNMP but not what I need.

snmpwalk returns a lot of data but does not give me CPU, Memory or Disk usage. Do I need to install some additional MIBs on the host or nagios? I have restarted the snmpd process but this did not help.

SNMP config

[root@esxihost:~] esxcli system snmp get

   Authentication:

   Communities: REDACTED

   Enable: true

   Engineid: 00000063000000a100000000

   Hwsrc: indications

   Largestorage: true

   Loglevel: info

   Notraps:

   Port: 161

   Privacy:

   Remoteusers:

   Syscontact: redacted@redacted.com

   Syslocation: LOCATION, ADDRESS

   Targets:

   Users:

   V3targets:

firewall config

[root@esxihost:~] esxcli network firewall ruleset list

Name                    Enabled

----------------------  -------

sshServer                  true

sshClient                 false

nfsClient                 false

nfs41Client               false

dhcp                       true

dns                        true

snmp                       true

ntpClient                  true

CIMHttpServer              true

CIMHttpsServer             true

CIMSLP                     true

iSCSI                     false

vpxHeartbeats              true

updateManager              true

faultTolerance             true

webAccess                  true

vMotion                    true

vSphereClient              true

activeDirectoryAll        false

NFC                        true

HBR                        true

ftpClient                 false

httpClient                false

gdbserver                 false

DVFilter                  false

DHCPv6                     true

DVSSync                    true

syslog                    false

WOL                        true

vSPC                      false

remoteSerialPort          false

rdt                       false

cmmds                     false

vsanvp                    false

rabbitmqproxy              true

ipfam                     false

vvold                     false

iofiltervp                 true

esxupdate                 false

vit                       false

vsanEncryption            false

pvrdma                    false

vsanhealth-unicasttest    false

dynamicruleset             true

Thanks