Description of problem: CEPH newbie following Ansible install guide, on this url:
Under 4.2. Ceph Block Device Installation
Step #2 Create a block device image, warning section.
# rbd feature disable image1 journaling deep-flatten exclusive-lock fast-diff object-map
rbd: failed to update image features: (22) Invalid argument
2017-01-25 15:07:12.297563 7f64d264ed80 -1 librbd: old-format images do not support features
Command doesn't work, however later I was able mount the rbd block device, even without the failed command (RHEL7.3).
Despite this warning "Users utilizing the kernel RBD client will not be able to map the block device image. You must first disable all these features, except layering."
Release note link mentions it will fail for 7.2 and this BZ#1340080.
One other tiny typo later on #5
# mount /dev/rbd/rbd/image2 /mnt/ceph-block-device
Image2 -> should be image1
Following all the examples mentioned before which all state image1.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
This does not look like a documentation bug.
waiting on Jason to tell us more before deciding if we can punt to the next version or this is a blocker.