Bug 1461713

Summary:	cannot map rbd created by Tendrl
Product:	[Red Hat Storage] Red Hat Storage Console	Reporter:	Martin Kudlej <mkudlej>
Component:	Ceph Integration	Assignee:	Nishanth Thomas <nthomas>
Status:	CLOSED WONTFIX	QA Contact:	sds-qe-bugs
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	3	CC:	kbader, mkarnik, mkudlej, nthomas, ppenicka, sankarshan, shtripat
Target Milestone:	---
Target Release:	4
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-11-19 05:41:09 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Martin Kudlej 2017-06-15 09:15:53 UTC

Description of problem:
Tendrl creates RBD which cannot be mapped. It is created with unsupported feature:

$ rbd --cluster test_ceph map rbd2 
rbd: sysfs write failed
RBD image feature set mismatch. You can disable features unsupported by the kernel with "rbd feature disable".
In some cases useful info is found in syslog - try "dmesg | tail" or so.
rbd: map failed: (6) No such device or address

$ dmesg | tail 
rbd: image rbd2: image uses unsupported features: 0x38

Version-Release number of selected component (if applicable):
ceph-ansible-2.2.11-1.el7scon.noarch
ceph-base-11.2.0-0.el7.x86_64
ceph-common-11.2.0-0.el7.x86_64
ceph-installer-1.3.0-1.el7scon.noarch
ceph-mon-11.2.0-0.el7.x86_64
ceph-osd-11.2.0-0.el7.x86_64
ceph-selinux-11.2.0-0.el7.x86_64
etcd-3.1.7-1.el7.x86_64
libcephfs2-11.2.0-0.el7.x86_64
python-cephfs-11.2.0-0.el7.x86_64
python-etcd-0.4.5-1.noarch
rubygem-etcd-0.3.0-1.el7.noarch
tendrl-alerting-3.0-alpha.3.el7scon.noarch
tendrl-api-3.0-alpha.4.el7scon.noarch
tendrl-api-doc-3.0-alpha.4.el7scon.noarch
tendrl-api-httpd-3.0-alpha.4.el7scon.noarch
tendrl-ceph-integration-3.0-alpha.5.el7scon.noarch
tendrl-commons-3.0-alpha.9.el7scon.noarch
tendrl-dashboard-3.0-alpha.4.el7scon.noarch
tendrl-node-agent-3.0-alpha.9.el7scon.noarch
tendrl-node-monitoring-3.0-alpha.5.el7scon.noarch
tendrl-performance-monitoring-3.0-alpha.7.el7scon.noarch


How reproducible:
100%

Steps to Reproduce:
1. create RBD by Tendrl
2. try to map it

Actual results:
image uses unsupported features: 0x38

Expected results:
It is able to map rbd created by Tendrl.

Comment 3 Shubhendu Tripathi 2017-06-15 10:07:30 UTC

Martin,

I use below set of commands to map the RBD. By default rbd created from tendrl is not disabled any features as the command `rbd create {image-name} --size {megabytes} --pool {pool-name} --cluster {cluster-name}` is used in tendrl

=====================
> rbd feature disable {rbd-name} fast-diff --cluster {cluster-name}
> rbd feature disable {rbd-name} object-map --cluster {cluster-name}
> rbd feature disable {rbd-name} deep-flatten --cluster {cluster-name}
> rbd map {rbd-name} --cluster {cluster-name}
/dev/rbd0
> mkfs -t xfs /dev/rbd0
> mkdir ~/rbd_mnt
> mount /dev/rbd0 ~/rbd_mnt

Comment 4 Martin Kudlej 2017-06-15 12:41:04 UTC

I haven't done steps:
> rbd feature disable {rbd-name} fast-diff --cluster {cluster-name}
> rbd feature disable {rbd-name} object-map --cluster {cluster-name}
> rbd feature disable {rbd-name} deep-flatten --cluster {cluster-name}

because I think that RBD created by Tendrl should be prepared for mapping right after it is created without any special tuning. I tried it on top of RHEL 7.4 and 
ceph-base-11.2.0-0.el7.x86_64
ceph-common-11.2.0-0.el7.x86_64
ceph-mon-11.2.0-0.el7.x86_64
ceph-selinux-11.2.0-0.el7.x86_64
libcephfs2-11.2.0-0.el7.x86_64
python-cephfs-11.2.0-0.el7.x86_64

Comment 5 Nishanth Thomas 2017-06-20 04:21:05 UTC

Is there a specific requirement talks about this?
Even in RHSC2.0 there was discussion around this(cblum initiated) and finally we decided to go ahead with the standard option
@JeffA can you comment here?

Comment 6 Jeff Applewhite 2017-06-20 13:16:59 UTC

@kbader can you comment on this?

Comment 12 Shubhendu Tripathi 2018-11-19 05:41:09 UTC

This product is EOL now