使用 frp 远程连接 Jupyter Lab/Notebook 无法连接到 Kernel, F12 查看控制台输出, 发现是有关 websocket failed 的错误. 一番搜索后发现是跳板机的问题.

    frp server 跑在跳板机上, 使用 nginx 做的域名映射如下:

    1. server {
    2.   listen 80;
    3.   server_name "xxx.xxxxx.xxxx";
    5.   location / {
    6.     proxy_pass http://127.0.0.1:8888;
    7.     proxy_set_header    Host            $host;
    8.     proxy_set_header    X-Real-IP       $remote_addr;
    9.     proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
    10.     proxy_hide_header   X-Powered-By;
    11.   }
    12. }

    Jupyter Lab/Notebook 在建立 Kernel 连接时用的是 WebSocket, 上面的域名映射默认不支持, 需要添加额外的 WebSocket 相关的映射, 修改后如下:

    1. server {
    2.   listen 80;
    3.   server_name "xxx.xxxxx.xxxx";
    5.   location / {
    6.     proxy_pass http://127.0.0.1:8888;
    7.     proxy_set_header    Host            $host;
    8.     proxy_set_header    X-Real-IP       $remote_addr;
    9.     proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
    10.     proxy_hide_header   X-Powered-By;
    11.   }
    12.   location /api/kernels/ {
    13.     proxy_pass            http://127.0.0.1:8888;
    14.     proxy_set_header      Host $host;
    15.     # websocket support
    16.     proxy_http_version    1.1;
    17.     proxy_set_header      Upgrade "websocket";
    18.     proxy_set_header      Connection "Upgrade";
    19.     proxy_read_timeout    86400;
    20.   }
    21.   location /terminals/ {
    22.     proxy_pass            http://127.0.0.1:8888;
    23.     proxy_set_header      Host $host;
    24.     # websocket support
    25.     proxy_http_version    1.1;
    26.     proxy_set_header      Upgrade "websocket";
    27.     proxy_set_header      Connection "Upgrade";
    28.     proxy_read_timeout    86400;
    29.   }
    30. }

    即把 /api/kernels/和/terminals/的协议更新为 WebSocket 即可.