Live migration can fail in dm-multipath environment on RHEL-OSP5

Solution Verified - Updated -

Issue

  • Live migration can fail in dm-multipath environment on RHEL-OSP5
  • On RHEL OSP5, iSCSI multipath is not setup automatically by the installer, so it needs to be set up manually. However, there is currently no OpenStack documentaion for setting up multipath. When either a customer who is used to setting up dm-multipath on RHEL or the customer references the sample file in /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf, live migration is likely to fail when using iSCSI multipath volume.

Environment

  • Red Hat releases new OpenStack Platform 5
  • Device Mapper Multipath(DM-multipath)

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