ceph (hammer, firefly): potential data loss when snapshotting rbd volume

[Dmitry Borodaenko]

As reported on ceph-devel, the Ceph version shipped with 7.0 (0.80.9) can be sent into a potentially data loss inducing crash by OpenStack services:
http://www.spinics.net/lists/ceph-devel/msg28018.html

Please consider upgrading Ceph for MOS 7.0 and earlier versions to the latest Firefly release (0.80.11) and cherry-picking the patches identified in the email to address this issue:
http://www.spinics.net/lists/ceph-devel/msg28019.html

[Alexei Sheplyakov (asheplyakov)]

MOS 8.0 includes ceph hammer (0.94.5) which is not affected by this problem.
Also recently we've prepared an update [1] of ceph in MOS 7.0 to the latest firefly release (0.80.10 at that time, actually the same version is shipped with Ubuntu 14.04).
However the maintenance team rejected the update and decided to maintain a fork.
In particular the fix of CVE-2015-5245 has been backported to 0.80.9 [3] (instead of updating to 0.80.11).

[1] https://review.fuel-infra.org/13608
[2] https://review.fuel-infra.org/14876
[3] http://tracker.ceph.com/issues/12942

[Fuel Devops McRobotson (fuel-devops-robot)]

Related fix proposed to branch: 7.0
Change author: Alexei Sheplyakov <email address hidden>
Review: https://review.fuel-infra.org/16073

[Alexei Sheplyakov (asheplyakov)]

CVE 2015-5245 is a radosgw bug and has nothing to do with this problem, removing the CVE link

[Alexei Sheplyakov (asheplyakov)]

Apparently ceph hammer is also affected: http://tracker.ceph.com/issues/14428

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: 8.0
Change author: Alexei Sheplyakov <email address hidden>
Review: https://review.fuel-infra.org/16535

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/16535
Submitter: Pkgs Jenkins <email address hidden>
Branch: 8.0

Commit: 62f26b7c41182509cea61848be2f35aa9968cd32
Author: Alexei Sheplyakov <email address hidden>
Date: Thu Jan 28 15:45:48 2016

Make the recovery after a crash during snapshotting easier

Added an upstream patch [1] which solves the problem.

[1] https://github.com/ceph/ceph/commit/aba6746b850e9397ff25570f08d0af8847a7162c

Closes-Bug: #1532967
Change-Id: I987cb9481507a02bf91c4bdd4e8669897c8fdde6

[Maksym Strukov (unbelll)]

root@node-2:~# ceph --version
ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)

in 8.0-570

[Alexey Stupnikov (astupnikov)]

We no longer support MOS5.1, MOS6.0, MOS6.1
We deliver only Critical/Security fixes to MOS7.0, MOS8.0.
We deliver only High/Critical/Security fixes to MOS9.2.