Werk #6834: df: Optionally produce metrics compatible to unix df command

Component	Checks & agents
Title	df: Optionally produce metrics compatible to unix df command
Date	Oct 22, 2018
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Add an option to exclude space reserved for the root user from the calculation of used space, to produce metrics matching the ouput of the unix df command. By default Check_MK treats space that is reserved for the root user on Linux and Unix as used space. Usually, 5% are being reserved for root when a new filesystem is being created. With this new option in the ruleset "Filesystem (used space and growth)" you can have Check_MK exclude the current amount of reserved but yet unused space from the calculations regarding the used space (absolute and percentage).

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