I'm trying to configure HaProxy to upgrade a connection for websockets.

Before haproxy, I used nginx and had the following in my nginx.conf file

      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "Upgrade";
      proxy_set_header Host $host;

My web system uses Phoenix sockets, and the websockets are sent over the same port but with the path /live.

My best guess at translating from other examples is:

This doesn't appear to upgrade the socket, and I don't have any real way of testing it other than watching for certain failures on mobile.

Any help would be appreciated.