Werk #5204: Host rename: Fixed broken rename of hosts in rrdcached journal

Component	Core & setup
Title	Host rename: Fixed broken rename of hosts in rrdcached journal
Date	Sep 11, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.4.0p12 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.2.8p26 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

When using the new Check_MK rrd format (single value per RRD), the host rename feature was not renaming host specific entries in the journal of the rrdcached.

This resulted in lost RRD values that have not been written to the RRDs yet.

Manual fix: You could stop the rrdcached (or the whole site), go to var/rrdcached and rename the host in the journal files manually, e.g. using sed.

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