cinder/releasenotes/notes/lvm-type-default-to-auto-a2ad554fc8bb25f2.yaml
John Griffith 8c57c6d3ee Set default lvm_type to auto
We've had an lvm_type=thin for quite some time, and we've wanted to
make it Cinders default for a while, but there's no clean way to
migrate on upgrades.  So, we have a compromise, detect if the
deployment has volumes (including the thin pool).  If there are no
LVs or if the thin pool exists, use thin.  Otherwise, use the old
thick lvm-default.

This patch makes the default setting "auto" instead of "default"
(which is actually thick).

DocImpact: Need to update docs to reflect the default setting for
new deployments is auto (thin)

Change-Id: If25e814eb6282fef9a1dd30d17c80eab6860e275
2017-06-16 09:25:53 -06:00

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YAML

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other:
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Modify default lvm_type setting from thick to auto. This will result in
Cinder preferring thin on init, if there are no LV's in the VG it will
create a thin-pool and use thin. If there are LV's and no thin-pool
it will continue using thick.