With the 1.1 release we should not be creating bluestore OSDs
with rook's legacy partitioning scheme. All new bluestore OSDs
should be created with ceph-volume. Therefore, the miminum
version allowed is a version of mimic supporting ceph-volume.

This commit also adds consistent version checking between
the Add and Update methods for the operator handling the
CR events.
Signed-off-by: travisn <tnielsen@redhat.com>

Mostly minor spelling mistakes and formatting cleanups.
Signed-off-by: Kristoffer Grönlund <kgronlund@suse.com>

CSI is now the preferred storage driver for Rook.
By default both the CSI and flex drivers will be started
by the operator. In a future release the flex driver
will be deprecated, but for now is still supported.

The drivers can be disabled with an environment
variable in the operator deployment in operator.yaml.
If users are only using one driver or the other there is
no need to enable both drivers.
Signed-off-by: travisn <tnielsen@redhat.com>

Signed-off-by: Noah Watkins <noahwatkins@gmail.com>

Signed-off-by: karmab <karimboumedhel@gmail.com>

Adding some more context and details to the ceph examples. Updated links to Nautilus, added several links to ceph documentation, explained block/file/object storage, fixed some syntax errors.
Signed-off-by: Sachin Agarwal <sachinkagarwal@gmail.com>

Signed-off-by: travisn <tnielsen@redhat.com>