How to use resize channel or stream?

[zxyao145]

Hello, I'm try to set sshd width and height, and my code like this:

var resizeStream = demux.GetStream(ChannelIndex.Resize, ChannelIndex.Resize);
var sizeInfo = "{\"Height\":24,\"Width\":114}";
var bytes = Encoding.UTF8.GetBytes(sizeInfo);
await resizeStream.WriteAsync(bytes, CancellationToken.None);

And it doesn't seem to work.

[tg123]

seems good, what do you mean by not work?
how did you verify?

[zxyao145]

I added a resize event to the browser's window. When the browser window changes, the web client will request to change the resize of sshd of the pod, but the output of the ls command is always three columns. I don't know whether this is normal

[tg123]

seems not correct
check if tput cols changes after resizing

[zxyao145]

seems not correct check if tput cols changes after resizing

Maybe something error, tput cols output always is 80, even I hard coded to resize.

Is there a way to display the debug log?

[tg123]

here is the code https://github.com/kubernetes/kubernetes/blob/88c952d256b7e724a3cc0e6654680fda2c953c39/pkg/kubelet/cri/streaming/remotecommand/httpstream.go#L412

seems you do not have a way to track it, but you may want to build your own kubelet to see if the resizing message was sent correctly
or
do some package capture

[zxyao145]

Get it, thanks a lot!