commit 8bc7b950b7c0a3c80cdd120fe4df97c14848c344
Author: Marcin Juszkiewicz <email address hidden>
Date: Wed Jan 3 17:44:27 2018 +0100
libvirt: use 'host-passthrough' as default on AArch64
Nova is assuming 'host-model' for KVM/QEMU setup.
On AArch64 it results in "libvirtError: unsupported configuration: CPU
mode 'host-model' for aarch64 kvm domain on aarch64 host is not
supported by hypervisor" message.
AArch64 lacks 'host-model' support because neither libvirt nor QEMU
are able to tell what the host CPU model exactly is. And there is no
CPU description code for ARM(64) at this point.
So instead we fallback to 'host-passthrough' to get VM instances
running. This will completely break live migration, *unless* all the
Compute nodes (running libvirtd) have *identical* CPUs.
Reviewed: https:/ /review. openstack. org/530965 /git.openstack. org/cgit/ openstack/ nova/commit/ ?id=8bc7b950b7c 0a3c80cdd120fe4 df97c14848c344
Committed: https:/
Submitter: Zuul
Branch: master
commit 8bc7b950b7c0a3c 80cdd120fe4df97 c14848c344
Author: Marcin Juszkiewicz <email address hidden>
Date: Wed Jan 3 17:44:27 2018 +0100
libvirt: use 'host-passthrough' as default on AArch64
Nova is assuming 'host-model' for KVM/QEMU setup.
On AArch64 it results in "libvirtError: unsupported configuration: CPU
mode 'host-model' for aarch64 kvm domain on aarch64 host is not
supported by hypervisor" message.
AArch64 lacks 'host-model' support because neither libvirt nor QEMU
are able to tell what the host CPU model exactly is. And there is no
CPU description code for ARM(64) at this point.
So instead we fallback to 'host-passthrough' to get VM instances
running. This will completely break live migration, *unless* all the
Compute nodes (running libvirtd) have *identical* CPUs.
Small summary: https:/ /marcin. juszkiewicz. com.pl/ 2018/01/ 04/today- i-was-fighting- with-nova- no-idea- who-won/
Closes-bug: #1741230
Co-authored-by: Kevin Zhao <email address hidden>
Co-authored-by: Marcin Juszkiewicz <email address hidden>
Change-Id: Iafb5f1790d6848 9db73b9f0549333 108c6426a00