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rbd: provide a way to disable the auto fallback to nbd mounter

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This change allows the user to choose not to fallback to NBD mounter
when some ImageFeatures are absent with krbd driver, rather just fail
the NodeStage call.

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
This commit is contained in:
Prasanna Kumar Kalever
2021-10-05 16:17:11 +05:30
committed by mergify[bot]
parent bfc24f6f12
commit 9a3170bf77
6 changed files with 31 additions and 3 deletions
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9
examples/rbd/storageclass.yaml
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@ -39,6 +39,15 @@ parameters:
# imageFeatures: layering,journaling,exclusive-lock
imageFeatures: layering
# (optional) Specifies whether to try other mounters in case if the current
# mounter fails to mount the rbd image for any reason. True means fallback
# to next mounter, default is set to false.
# Note: tryOtherMounters is currently useful to fallback from krbd to rbd-nbd
# in case if any of the specified imageFeatures is not supported by krbd
# driver on node scheduled for application pod launch, but in the future this
# should work with any mounter type.
# tryOtherMounters: false
# (optional) mapOptions is a comma-separated list of map options.
# For krbd options refer
# https://docs.ceph.com/docs/master/man/8/rbd/#kernel-rbd-krbd-options