Description of problem:
StorwizeSVCISCSIDriver provided Cinder volumes do not provide the required target_{portals,luns,iqns} via connection_info when Nova is using multipath. This is currently being worked on upstream as part of the following change and blueprint :
Add multipath enhancement to Storwize iSCSI driver
https://review.openstack.org/#/c/308882/
Storwize iSCSI Multipath enhancement
https://blueprints.launchpad.net/cinder/+spec/storwize-iscsi-multipath-enhancement
Version-Release number of selected component (if applicable):
Ocata / OSP 11
How reproducible:
Always.
Steps to Reproduce:
1. Using the StorwizeSVCISCSIDriver Cinder volume driver attach a volume to a single instance.
2. Review the connected portals, targets, path devices etc.
Actual results:
Nova does not correctly connect to or disconnect from all required portals when using StorwizeSVCISCSIDriver supplied Cinder volumes. Only a single target_portal is listed in connection_info with a sendtargets query against this portal not returning the additional portals required to correctly form a multipath'd connection from the compute host.
Expected results:
Nova correctly connects to or disconnects from all required portals when using supplied Cinder volumes.
Additional info:
Eric,
I don't have access to a Storwize storage, you know of any such system we can access?
Is this a specific driver issue, or can I try to verify with any other iscsi driver instead, I'm guessing probably specific.
In which case how would I verify this?
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/RHEA-2017:1245