запустите с флагами -vvvv и внимательно смотрите на debug
я через awx в режиме debug вижу такой вывод
"exception": " File \"/tmp/ansible_EuCqdo/ansible_modlib.zip/ansible/module_utils/docker_common.py\", line 382, in get_container\n for container in self.containers(all=True):\n File \"/opt/ans/lib/python2.7/site-packages/docker/api/container.py\", line 85, in containers\n res = self._result(self._get(u, params=params), True)\n File \"/opt/ans/lib/python2.7/site-packages/docker/client.py\", line 181, in _result\n return response.json()\n File \"/opt/ans/lib/python2.7/site-packages/requests/models.py\", line 892, in json\n return complexjson.loads(self.text, **kwargs)\n File \"/root/.pyenv/versions/2.7.14/lib/python2.7/json/init.py\", line 339, in loads\n return _default_decoder.decode(s)\n File \"/root/.pyenv/versions/2.7.14/lib/python2.7/json/decoder.py\", line 364, in decode\n obj, end = self.raw_decode(s, idx=_w(s, 0).end())\n File \"/root/.pyenv/versions/2.7.14/lib/python2.7/json/decoder.py\", line 382, in raw_decode\n raise ValueError(\"No JSON object could be decoded\")\n",