Live migration fails with 'Unacceptable CPU info: CPU doesn't have compatibility' between non-rebooted and rebooted compute nodes after in-place OpenStack Platform major upgrade
Issue
After an in-place OpenStack Platform major upgrade, live migration fails with the following error when the source node has not been rebooted and the target node has:
Unacceptable CPU info: CPU doesn't have compatibility
Environment
- Red Hat OpenStack Platform after major upgrade.
- Red Hat Enterprise Linux (RHEL) 7 on overcloud nodes.
microcode_ctl-2.1-22.5.el7_4.x86_64andlinux-firmware-20170606-58.gitc990aae.el7_4.noarchinstalled as part of the upgrade.- Non-rebooted source compute node is running microcode version 59 and rebooted target is running microcode version 58.
- The
IBPBCPU model is in use on the source node but not the target node.
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