Bug 1500294
| Summary: | Cinder backup does not encode correct features in Ceph Objects for Ceph Mirroring | |||
|---|---|---|---|---|
| Product: | Red Hat OpenStack | Reporter: | Ganesh Kadam <gkadam> | |
| Component: | openstack-cinder | Assignee: | Jon Bernard <jobernar> | |
| Status: | CLOSED ERRATA | QA Contact: | Avi Avraham <aavraham> | |
| Severity: | medium | Docs Contact: | ||
| Priority: | medium | |||
| Version: | 10.0 (Newton) | CC: | eharney, jobernar, mlopes, slinaber, srevivo, tshefi | |
| Target Milestone: | z7 | Keywords: | Triaged, ZStream | |
| Target Release: | 10.0 (Newton) | |||
| Hardware: | x86_64 | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | openstack-cinder-9.1.4-17.el7ost | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 1509326 (view as bug list) | Environment: | ||
| Last Closed: | 2018-02-27 16:39:47 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: | ||||
| Bug Depends On: | ||||
| Bug Blocks: | 1509326 | |||
Hi Jon, Got an osp11 bz clone for this bug with needinfo set on Eric asking how to verify this same bz. Maybe you have an idea what/how I should verify this bz? Tzach, you'll have to do this manually. On OSP10, configure the backup pool to be mirrored to a secondary ceph cluster, and then create a volume backup. If the image features are managed correctly, the backup image should show up in the secondary pool. I'm happy to help with this if needed, just let me know. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:0360 |
Description of problem: While configuring Ceph Mirroring, One of our Architect have discovered a bug in the cinder-volume service a bug in the cinder backup driver for Ceph. In the file, $PYTHON_LIB/cinder/backup/drivers/ceph.py The _get_rbd_support() in cinder/backup/drivers/ceph.py is called whenever a new backup object is created. In this function, it only sets TWO features, layering and striping, and it DOES NOT reference the settings in /etc/ceph/ceph.conf. We need more than this feature for Ceph mirroring to work. def _get_rbd_support(self): """Determine RBD features supported by our version of librbd.""" old_format = True features = 0 if self._supports_layering: old_format = False features |= self.rbd.RBD_FEATURE_LAYERING if self._supports_stripingv2: old_format = False features |= self.rbd.RBD_FEATURE_STRIPINGV2 Version-Release number of selected component (if applicable): RHSOP10 [heat-admin@laxmain-controller0 ~]$ rpm -qa | grep cinder openstack-cinder-9.1.4-6.el7ost.noarch python-cinderclient-1.9.0-6.el7ost.noarch python-cinder-9.1.4-6.el7ost.noarch puppet-cinder-9.5.0-2.el7ost.noarch How reproducible: To test that this is the problem, They forced the features to be 125 (for other services we set this in rbd_default_features in /etc/ceph/ceph.conf, but cinder-backup doesn't read this file for some reason). This looks like it MIGHT be fixed in upstream, but they have not tested the code as of yet: ~~~ http://git.openstack.org/cgit/openstack/cinder/tree/cinder/backup/drivers/ceph.py#n238 ~~~ Cu would like to have a hotfix for this at the earliest convenience.