Generally, the VNC configuration of the/etc/Nova/nova.conf configuration file is improper

Open, replace with

2. Modify novncproxy_base_URL, try to use IP address instead of domain name

For server_proxyclient_Address if you use a domain name, you need to modify the resolution in the local host file

Add a line: IP addresses Domain name

After modification Systemctl restart openstack-nova-compute.service restart the service

Problem solving