Bug 1478915
| Summary: | Nova not using mpath device when using unity cinder plugin for dell_emc | ||
|---|---|---|---|
| Product: | Red Hat OpenStack | Reporter: | Jaison Raju <jraju> |
| Component: | openstack-cinder | Assignee: | Gorka Eguileor <geguileo> |
| Status: | CLOSED WONTFIX | QA Contact: | Avi Avraham <aavraham> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 11.0 (Ocata) | CC: | eharney, geguileo, jraju, pgrist, scohen, srevivo, tshefi |
| Target Milestone: | --- | Keywords: | Unconfirmed, ZStream |
| Target Release: | 11.0 (Ocata) | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-08-25 13:28:05 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: | 1443612 | ||
| Bug Blocks: | |||
From what we see, the problem is that the multipath doesn't create any of these 2 symlinks "/dev/mapper/<WWN>" or "/dev/disk/by-id/dm-uuid-mpath-<WWN>", which are the one os-brick is looking for. Although in coming releases in Ocata, os-brick will no longer use that mechanism to detect the multipaths. Once we test & pass this new package via the following bugs, you can confirm the new mechanism will work . https://bugzilla.redhat.com/show_bug.cgi?id=1484431 https://bugzilla.redhat.com/show_bug.cgi?id=1443612 |
Description of problem: After configuring multipath as per doc for iscsi unity cinder driver , nova is not able to find mpath device for the volume . The instance ends up getting single path device. Version-Release number of selected component (if applicable): python-os-brick-1.11.0-1.el7ost.noarch RHOS11 How reproducible: Always in customer environment Steps to Reproduce: 1. 2. 3. Actual results: nova-compute logs that mpath device is not visible although the device is visible in multipath -ll . Expected results: nova-compute uses the mpath device for the corresponding volume. Additional info: nova-compute.log 2017-08-06 22:38:26.394 256626 WARNING os_brick.initiator.linuxscsi [req-29b5393b-cbec-468d-ac81-7f7fe666ead4 57ebc072672d48eca08779cec03c3b67 eceeb89ddbaa44bb8fb5db2f935ae9fd - - -] Couldn't find multipath device /dev/mapper/360060160222044002bd07e5933aec3cb # virsh dumpxml instance-00000009 |grep disk <nova:disk>4</nova:disk> <disk type='block' device='disk'> <source dev='/dev/disk/by-path/pci-0000:81:00.0-fc-0x500009735018609f-lun-2'/> <alias name='virtio-disk0'/> </disk> <disk type='block' device='disk'> <source dev='/dev/disk/by-path/ip-192.168.0.1:3260-iscsi-iqn.1992-04.com.emc:cx.apm00xxxxxx-lun-1'/> <alias name='virtio-disk1'/> </disk>