Curl：连接后从代理收到 HTTP 代码 404

Question

我使用下面的命令来获取令牌。

curl -s -X POST http://127.0.0.1:5000/v2.0/tokens -H "Content-Type: application/json" -d '{"auth": {"tenantName": "'"$OS_TENANT_NAME"'", "passwordCredentials": {"username": "'"$OS_USERNAME"'", "password": "'"$OS_PASSWORD"'"}}}'| python -m json.tool

之后我想对 openstack keystone 服务进行curl 调用。所以我尝试了，curl https://keystone:5000

但它引发了一个错误

curl: (56) Received HTTP code 404 from proxy after CONNECT

如何对 openstack 服务进行curl 调用？