def get_host_by_grain(grain, runner_cfg=None, authtoken=None, planet_name=None):
if authtoken is None:
authtoken = get_saltapi_authtoken(runner_cfg)
saltapi = SkySaltAPI(
planet_name=planet_name,
authtoken=authtoken
)
_, result = saltapi.grains_item(tgt=grain, expr_form='grain', arg=['host',])
return result['return']
