Mounted ACFS file system not recognised by snmp

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux (RHEL) 7.4
  • net-snmp-5.7.2-28.el7_4.1

Issue

The current version of net-snmp in RHEL-7.4 (net-snmp-5.7.2) does not provide support for ASM Cluster File System (ACFS) and we cannot monitor e.g. disk usage for mounts of this type.

For example disk /dev/asm/app_vg01-420 is omitted in snmpwalk output:

# df -h
Filesystem                       Size  Used Avail Use% Mounted on
/dev/mapper/root                 7,1G  4,9G  2,3G  69% /
/dev/asm/app_vg01                100G   61G   40G  61% /u

$ snmpwalk -v1 -c public localhost UCD-SNMP-MIB::dskPercent
UCD-SNMP-MIB::dskPercent.1 = INTEGER: 69

We are expecting line

UCD-SNMP-MIB::dskPercent.2 = INTEGER: 61

to be displayed as well.

Resolution

Update to net-snmp-5.7.2-33.el7_5.2 shipped with Advisory RHBA-2018:1382 or newer.

Root Cause

The net-snmp package did not provide support for Automatic Storage Management Cluster File System (ACFS). The upstream implementation of ACFS support has been backported and released with net-snmp-5.7.2-33.el7_5.2 and newer.

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