There are two issues at odds with the cephfs driver. The
first is that older kernels less than 4.17 do not support
quotas so PVC sizes will not be enforced with the kernel
driver in that case. If the FUSE client is used instead, there
are issues during upgrade because the client mount will be
disrupted and the client pods will have to restart.
To prevent client pods from breaking during upgrade, we enable
the kernel driver by default. If the quotas are critical,
the admin will need to take steps during upgrade to prevent
breaking the applications.
Signed-off-by: Travis Nielsen <tnielsen@redhat.com>
Travis Nielsen
804e41132d