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Werk #10343: lnx_if: Fixed flapping discovery of interfaces if output of ethtool is missing

ComponentChecks & Agents
Titlelnx_if: Fixed flapping discovery of interfaces if output of ethtool is missing
Date2019-10-16 11:33:10
Checkmk EditionCheckmk Raw Edition (CRE)
Checkmk Version1.6.0p5,1.7.0i1
LevelTrivial Change
ClassBug Fix
CompatibilityIncompatible - Manual interaction might be required

Re-discoveries on Linux hosts which provide the lnx_if section may found new and vanished interfaces if the output of ethtool is missing. You have to perform a rediscovery on affected Linux hosts.

Moreover if you have already used a previous 1.6.0 version then some interface statistics may be faulty.

Details: lnx_if section consists of three parts: ip address, /proc/net/dev and ethtool. ip address and ethtool may be missing. If the index of ethtool is available we use this one. Otherwise we sort the output of /proc/net/dev as the agent does and calculate the index synthetically.