我正在使用特米纳多我在 Docker 容器内部的端口上运行unique.pydemo 文件夹9090，其 IP 为172.17.0.2
因此我使用 apache2 设置了反向代理：
<VirtualHost *:80>
ServerAdmin webmaster@localhost
ServerName terminal.local
ServerAlias terminal.kide
DocumentRoot /home/satnam-sandhu/Workstation/virtualhost
<Directory />
Options -Indexes +FollowSymLinks
AllowOverride None
Require all granted
</Directory>
ProxyPreserveHost On
ProxyVia Full
<Proxy *>
Require all granted
</Proxy>
ProxyPass / http://172.17.0.2:9090/
ProxyPassReverse / http://172.17.0.2:9090/
ErrorLog /var/log/apache2/local.kide-error.log
LogLevel error
CustomLog /var/log/apache2/local.kide-access.log combined
</VirtualHost>
当我http://terminal.local从浏览器访问时出现此错误：
WebSocket 与 'ws://terminal.local/websocket' 连接失败：WebSocket 握手期间出错：意外响应代码：400
我应该做些什么？
以下是错误日志：
[Mon Jun 25 16:13:43.072784 2018] [proxy:error] [pid 14905:tid 139981405693696] (111)Connection refused: AH00957: HTTP: attempt to connect to 127.0.0.1:9090 (127.0.0.1) failed
[Mon Jun 25 16:13:43.072892 2018] [proxy:error] [pid 14905:tid 139981405693696] AH00959: ap_proxy_connect_backend disabling worker for (127.0.0.1) for 60s
[Mon Jun 25 16:13:43.072900 2018] [proxy_http:error] [pid 14905:tid 139981405693696] [client 127.0.0.1:34494] AH01114: HTTP: failed to make connection to backend: 127.0.0.1
[Mon Jun 25 16:13:43.486626 2018] [proxy:error] [pid 14905:tid 139981397300992] AH00940: HTTP: disabled connection for (127.0.0.1)
[Mon Jun 25 16:57:24.538726 2018] [proxy:error] [pid 1954:tid 140063423616768] (111)Connection refused: AH00957: HTTP: attempt to connect to 127.0.0.1:9090 (127.0.0.1) failed
[Mon Jun 25 16:57:24.688176 2018] [proxy:error] [pid 1954:tid 140063423616768] AH00959: ap_proxy_connect_backend disabling worker for (127.0.0.1) for 60s
[Mon Jun 25 16:57:24.688220 2018] [proxy_http:error] [pid 1954:tid 140063423616768] [client 127.0.0.1:45860] AH01114: HTTP: failed to make connection to backend: 127.0.0.1
[Mon Jun 25 16:57:25.290133 2018] [proxy:error] [pid 1954:tid 140063406831360] AH00940: HTTP: disabled connection for (127.0.0.1)