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Marki
Asked: 2018-11-12 08:52:14 +0800 CST

Using SNMP for detecting filesystem anomalies (read-only, etc.)

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Usually when there is a problem, the filesystem mounts itself read-only:

[449551.919049] EXT3-fs (dm-2): error: ext3_journal_start_sb: Detected aborted journal
[449551.919056] EXT3-fs (dm-2): error: remounting filesystem read-only

Now I tried to catch that using monitoring via SNMP that we have in place anyway, but it didn't:

# snmpwalk -c public -v 2c localhost HOST-RESOURCES-MIB::hrFSTable
SNMP table: HOST-RESOURCES-MIB::hrFSTable

...
HOST-RESOURCES-MIB::hrFSAccess.11 = INTEGER: readWrite(1)
HOST-RESOURCES-MIB::hrFSAccess.12 = INTEGER: readWrite(1) ***

It seems to show the configured, not the current state.

Is there any other way to catch this, preferably using SNMP, without resorting to actually having to write a file and check the outcome?

BTW

  • OS: SLES11-SP3
  • Kernel 3.0.101
  • net-snmp-5.4.2.1
filesystems

1 Answers

  1. Combination of extension command in snmpd.conf and recipies from here (serverfault) should do the trick.

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