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2017-08-30 14:13:12 -0500 answered a question Instances stuck on "Booting from Hard Drive"

If your host is centos/rhel 7.3 running as a VM on ESXi, there is a quick fix to have hardware assisted virtualization (virt_type = kvm) work.

In the [libvirt] section of /etc/nova/nova.conf set hw_machine_type as follows:

hw_machine_type = x86_64=pc-i440fx-rhel7.2.0

2017-08-30 14:09:12 -0500 answered a question Instance get stuck when booting grub

If your compute host is centos/rhel 7.3 running as a VM on ESXi, there is a quick fix to have hardware assisted virtualization (virt_type = kvm) work.

In the [libvirt] section of /etc/nova/nova.conf set hw_machine_type as follows:

hw_machine_type = x86_64=pc-i440fx-rhel7.2.0

2017-06-11 22:07:55 -0500 answered a question Ocata, VNC shows Cirros instance stuck at "GRUB"

Update with a quick fix:

On the compute node(s) in the [libvirt] section of /etc/nova/nova.conf set hw_machine_type as follows:

hw_machine_type = x86_64=pc-i440fx-rhel7.2.0


I had the same problem when I tried to upgrade two compute nodes from CentOS 7.2 to 7.3. You can find more details about the issue, if you google "Openstack doesn't work on CentOS 7.3 update" (question #407577).

Try CentOS 7.2 on a new compute node or downgrade kernel on your existing compute node from 3.10.0-514 to 3.10.0-327.