RHEL 9.x VMs Are Stuck Booting With Kernel Panic

Problem

• RHEL 9.x VMs are unable to boot. Booting fails with Kernel Panic. The instance console logs display the following error

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Fatal glibc error: CPU does not support x86-64-v2

Environment

• Platform9 Managed OpenStack - v5.8 and Higher
• RHEL 9.x

Cause

• Incompatible CPU model on the host causing instance deployment to fail

Resolution

• Need to set cpu_mode and cpu_model in /opt/pf9/etc/nova/conf.d/nova_override.conf

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[libvirt]

live_migration_uri = qemu+tls://%s/system?no_verify=1&pkipath=/etc/pf9/certs/libvirt

live_migration_flag = VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_LIVE, VIR_MIGRATE_TUNNELLED

cpu_mode = custom

cpu_model = "<Model_name>"

Additional Information

• For more details, please refer to: Red Hat Solution 6833751 - Resolving CPU model compatibility issues during instance deployment.