[CORE] Set ray client server host when starting ray.

[surenyufuz]

Description

When starting ray processes, we can use the flag --dashboard-host to set the host for the dashboard server to bind , either localhost (127.0.0.1) or 0.0.0.0.

So can we do the same thing with ray client server ? For example, add a flag which could be like --ray-client-server-host.

Currently, ray client server port could be set from node-ip-address.

For some security reasons, I should keep the node ip address which is not 127.0.0.1 and only set 127.0.0.1 for ray client server to bind. As far as I can see, ray client server is only used to be connected from users' scripts, set the host to 127.0.0.1 for it would not cause other problems.

[Superskyyy]

You mean in the case that you will only dispatch from within the head node so there isn't a need to expose the client server host to the public right?

[surenyufuz]

You mean in the case that you will only dispatch from within the head node so there isn't a need to expose the client server host to the public right?

Thanks for your reply. Not exactly, maybe I can use an exposed proxy with authentication logic to check whether a user could connect to the ray client server, the proxy and the head node are deployed on the same Kubernetes node, both of them could connect with each other by the host net.

[jjyao]

@surenyufuz Are you trying to use Ray client from within the Ray cluster?

[surenyufuz]

@surenyufuz Are you trying to use Ray client from within the Ray cluster?

No, I am trying to use Ray client in a Kubernetes pod outside the Ray cluster through a proxy.

The exposed proxy is deployed with the head node on a Kubernetes node, as the proxy can forward client requests to the head node with local host, I don't need to expose the host of Ray client server.