[ovirt-users] VDSM ovirt-node-2 command Get Host Capabilities failed: Internal JSON-RPC error: {'reason': "invalid argument: KVM is not supported by '/usr/libexec/qemu-kvm' on this host"}

The version of ovirt-engine is 4.3.5.5-1.el7 The version of ovirt-node-2 is 4.3.5.2-1.el7 When I add ovirt-node-2 to ovirt-engine ，it report: VDSM ovirt-node-2 command Get Host Capabilities failed: Internal JSON-RPC error: {'reason': "invalid argument: KVM is not supported by '/usr/libexec/qemu-kvm' on this host"} What 's the root cause of this problem ? How can I solve this problem ?