Werk #6665: Checks may now yield the value None as plugin output

Component

Checks & agents

Title

Checks may now yield the value None as plugin output

Date

Oct 10, 2018

Level

Trivial Change

Class

New Feature

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

1.6.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)
1.5.0p6	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

A check usually returns a state, followed by text and optional perfdata. The plugin output was not well formatted, in case yield returned an empty string. It is now possible to yield None as plugin output, which instructs the Check API to ignore this value.

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