centos7openstackdevstack
Nova Compute Service throwing error nova requires Qemu version 2.1.0 or greater
Nova compute service is not running in the fresh devstack installation of OpenStack ; giving an error
nova requires Qemu version 2.1.0 or greater
when I checked version info I found the qemu-kvm version 2.9.0 was available but hypervisor was running on qemu 2.0.0 all other services are running fine.
Solution
qemu is provided by two different repos qemu-ev and EPEL. libvert only sees qemu version installed by epel repository. so removing epel repo and restarting libvirt service should fix the issue
sudo yum remove qemu-system-x86
sudo service libvirtd restart
sudo service devstack@n-cpu restart
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