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SNMP Disk Free Sensor with VMware vCenter Server Virtual Appliance 6.0 (vCSA)

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Why can't I use the "SNMP Linux Disk Free Sensor with vmWare vCSA ?

It fails to find any disks...

disk-free snmp-sensor vcsa6 vmware

Created on Oct 4, 2018 5:44:22 PM by  JR Andreassen [Paessler Support]



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There appears to be a "bug" in the vCSA snmp implemenmtation for 6.0...

(Tested with VMware-vCenter-Server-Appliance 6.0.0.10000 embedded build 3018521 VMware, Inc x86_64)

The Linux Disk XXX sensors use the MIB-II Host Resources tables:

For the Disk Free sensor we check the hrStorage Table for hrDeviceType(1.3.6.1.2.1.25.2.3.1.2) .hrStorageTypes one of : hrStorageFixedDisk(1.3.6.1.2.1.25.2.1.4) hrStorageRamDisk(1.3.6.1.2.1.25.2.1.8) hrStorageNetworkDisk(1.3.6.1.2.1.25.2.1.10)

With the vCSA 6.0, it returns:

1.3.6.1.2.1.25.2.3.1.2.1 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.2 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.3 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.4 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.5 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.6 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.7 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.8 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.9 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.10 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.11 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.12 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.13 = OID: .1.3.6.1.2.1.25.2.1.4
1.3.6.1.2.1.25.2.3.1.2.14 = "0.0.0"
1.3.6.1.2.1.25.2.3.1.3.1 = "/" 
1.3.6.1.2.1.25.2.3.1.3.2 = "/dev" 
1.3.6.1.2.1.25.2.3.1.3.3 = "/dev/shm" 
1.3.6.1.2.1.25.2.3.1.3.4 = "/boot" 
1.3.6.1.2.1.25.2.3.1.3.5 = "/storage/core" 
1.3.6.1.2.1.25.2.3.1.3.6 = "/storage/log" 
1.3.6.1.2.1.25.2.3.1.3.7 = "/storage/db" 
1.3.6.1.2.1.25.2.3.1.3.8 = "/storage/dblog" 
1.3.6.1.2.1.25.2.3.1.3.9 = "/storage/seat" 
1.3.6.1.2.1.25.2.3.1.3.10 = "/storage/netdump" 
1.3.6.1.2.1.25.2.3.1.3.11 = "/storage/autodeploy" 
1.3.6.1.2.1.25.2.3.1.3.12 = "/storage/invsvc" 
1.3.6.1.2.1.25.2.3.1.3.13 = "/var/spool/snmp" 
1.3.6.1.2.1.25.2.3.1.3.14 = "Real Memory" 

Looking at:

1.3.6.1.2.1.25.2.3.1.2.1 = "1.3.6.1.2.1.25.2.3.1.2.4"
Which is 
 X.n = "X.4"  where 
  X is the OID of hrDeviceType
  n is the Table index
  4 the "Fixed Disk" index of the hrStorageTypes table...
Which is the wrong OID...
It should be:
1.3.6.1.2.1.25.2.3.1.2.1 = "1.3.6.1.2.1.25.2.1.4"
 X.n = "Y"  where 
  X is the OID of hrDeviceType
  Y is the "Fixed Disk" entry in hrStorageTypes table...

With vCSA 6.7, it comes back correctly..

.1.3.6.1.2.1.25.2.3.1.2.1 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.2 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.3 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.4 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.5 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.6 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.7 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.8 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.9 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.10 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.11 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.12 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.13 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.14 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.15 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.16 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.17 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.18 = OID: .1.3.6.1.2.1.25.2.1.4
.1.3.6.1.2.1.25.2.3.1.2.19 = OID: .1.3.6.1.2.1.25.2.1.2
.1.3.6.1.2.1.25.2.3.1.3.1 = STRING: "/dev"
.1.3.6.1.2.1.25.2.3.1.3.2 = STRING: "/dev/shm"
.1.3.6.1.2.1.25.2.3.1.3.3 = STRING: "/run"
.1.3.6.1.2.1.25.2.3.1.3.4 = STRING: "/sys/fs/cgroup"
.1.3.6.1.2.1.25.2.3.1.3.5 = STRING: "/"
.1.3.6.1.2.1.25.2.3.1.3.6 = STRING: "/tmp"
.1.3.6.1.2.1.25.2.3.1.3.7 = STRING: "/storage/db"
.1.3.6.1.2.1.25.2.3.1.3.8 = STRING: "/storage/core"
.1.3.6.1.2.1.25.2.3.1.3.9 = STRING: "/storage/netdump"
.1.3.6.1.2.1.25.2.3.1.3.10 = STRING: "/storage/seat"
.1.3.6.1.2.1.25.2.3.1.3.11 = STRING: "/storage/log"
.1.3.6.1.2.1.25.2.3.1.3.12 = STRING: "/storage/dblog"
.1.3.6.1.2.1.25.2.3.1.3.13 = STRING: "/storage/autodeploy"
.1.3.6.1.2.1.25.2.3.1.3.14 = STRING: "/storage/archive"
.1.3.6.1.2.1.25.2.3.1.3.15 = STRING: "/storage/imagebuilder"
.1.3.6.1.2.1.25.2.3.1.3.16 = STRING: "/storage/updatemgr"
.1.3.6.1.2.1.25.2.3.1.3.17 = STRING: "/boot"
.1.3.6.1.2.1.25.2.3.1.3.18 = STRING: "/var/spool/snmp"

Given that this is an error / bug on the part of the Linux Distro used by the vmWare vCSA, Paessler can't change the Sensor to accommodate it...

We recommend upgrading the vCSA to a version that reports the disk type correctly...

Created on Oct 4, 2018 5:52:59 PM by  JR Andreassen [Paessler Support]

Last change on Oct 4, 2018 6:02:47 PM by  JR Andreassen [Paessler Support]



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