I tried writing a websocket client with C++ and Javascript, in both case, wireshark shows that nothing was coming back from the server after initial websocket handshake with a url like the following: ws://myhost:2375/containers/657cf5d077b3/attach/ws?stdin=1&stdout=1&stderr=1&stream=1 I tried writ…

need a whole bunch more information… what is running inside the container?

docker cli command attach does not support websocket option. I also searched docker go API, but its ContainerAttach does not seem to support WebSocket option, python attach API supports websocket, but I haven’t tried yet.

python sdk works, will check the traffic capture to see why my REST client code does not work.

@leikong could you share the python code you used to attach to a container via websocket? Did you use the attach_socket function? I’m just looking for an example somewhere of setting up a websocket stream to a container’s stdout via the python docker SDK

Container attach via websocket

General

leikong (Leikong) February 7, 2018, 5:13am 3

bash

Calling REST API attach (without websocket) works fine in my simple test terminal code.

Thanks

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Container attach via websocket

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