How to let cloud-hypervisror communicate with the vhost RNG daemon

[wangchao-sh]

start rng backend daemon:
#vhost-device-rng --socket-path=/tmp/rng.sock -c 1 -m 512 -p 1000

use ch-remote to let running cloud-hyperviosr communicate with the rng daemon:
# ch-remote --api-socket /work/run/clh.sock add-user-device socket=/tmp/rng.sock0,id=rng0 Error running command: Server responded with an error: InternalServerError: ApiError(VmAddUserDevice(DeviceManager(VfioUserCreateClient(StreamRead(Os { code: 104, kind: ConnectionReset, message: "Connection reset by peer" })))))

# ch-remote --api-socket /work/run/clh.sock add-device socket=/tmp/rng.sock0,id=rng0 Error running command: Error parsing device syntax: Error parsing --device: unknown option: socket

The error occurs when using the add-device or add-user-device parameter.

[vireshk]

@mathieupoirier inputs ?

[stsquad]

This looks like a problem on the cloud hypervisor side but you can run the daemon with:

env RUST_LOG=debug vhost-device-rng --socket-path=/tmp/rng.sock -c 1 -m 512 -p 1000

and you might get a bit more information on what is failing.

[mathieupoirier]

I have no background or context on this. I will look into it in the coming days.

…

On Fri, 26 May 2023 at 04:57, Viresh Kumar ***@***.***> wrote: @mathieupoirier <https://github.com/mathieupoirier> inputs ? — Reply to this email directly, view it on GitHub <#331 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAELPW7I4Z77AHGX6EAPSHLXICEAPANCNFSM6AAAAAAXINNZCI> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[mathieupoirier]

@wangchao-sh What is "ch-remote"? Can you provide more information on it? As @stsquad mentionned, it seems to be a problem related to cloud-hypervisor. It could also be an issue with priviliges. I'm afraid not much can be done with the information currently provided.

[stefano-garzarella]

@wangchao-sh ping

Do you still have this problem or can we close this issue?