Comment 4 for bug 1762511

After a couple of fixes [1][2][3], I managed to get the "wss" connection work in master branch. I will backport the fixes to stable branches after they are merged in master.

To setup secure websocket correctly, it requires additional steps to configure the zun websocket proxy as following:

    [websocket_proxy]
    ...
    ssl_only = True
    cert = /opt/stack/data/devstack-cert.pem

In which, the "cert" is the certificates used in the OpenStack deployment.

[1] https://review.openstack.org/#/c/619907/
[2] https://review.openstack.org/#/c/619934/
[3] https://review.openstack.org/#/c/619942/