def __init__(self, dns_name=None, origin_access_identity=None):
        self.dns_name = dns_name
        self.origin_access_identity = origin_access_identity
checks that the machine's distro is supported
dataset/ETHPy150Open darcyliu/storyboard/boto/cloudfront/origin.py/S3Origin.__init__--crossover with--dataset/ETHPy150Open cloudify-cosmo/packman/packman/utils.py/check_distro