I have two vms, one with rally and the other with openstack environment. The openstack vm has two nics,192.168.60.73 for public network, and 172.16.0.254 for manage network.The rally vm can access 192.168.60.73,but can't access 172.16.0.254.

I created deployment on rally vm:

{
    "type": "ExistingCloud",
    "endpoint": {
        "auth_url": "http://192.168.60.73:5000/v2.0",
        "username": "admin",
        "password": "password",
        "tenant_name": "admin",
        "use_public_urls": True
        }
}

After creating deployment,when I run rally show images it shows

rally CommunicationError: Error communicating with http://172.16.0.254:9292 [Errno 110] Connection timed out

why rally didn't try to access 192.168.60.73 but 172.16.0.254?Please somebody help me.