def _ReadKVMRuntime(self, instance_name):
    """Read an instance's KVM runtime

    """
    try:
      file_content = utils.ReadFile(self._InstanceKVMRuntime(instance_name))
    except EnvironmentError, err:
      raise errors.HypervisorError("Failed to load KVM runtime file: %s" % err)
    return file_content
dataset/ETHPy150Open ganeti/ganeti/lib/hypervisor/hv_kvm/__init__.py/KVMHypervisor._ReadKVMRuntime/original