在 NodejS 中附加 Docker Websocket

Posted 2023-02-16

【中文标题】在 NodejS 中附加 Docker Websocket

【英文标题】：Docker Websocket Attaching in NodejS

【发布时间】：2014-04-16 20:07:46

【问题描述】：

我想用 Websockets 连接到 Docker API，但是，在任何容器中它只会给我 403 Forbidden Error。我不知道我做错了什么，没有足够的文档，但这是我的代码：

var docker = require('docker.io')(
    socketPath: false,
    host: "http://127.0.0.1",
    port: "4500"
);
var WebSocket = require('ws');

var opts = 
    "AttachStdin": true,
    "AttachStdout": true,
    "AttachStderr": true,
    "Tty": true,
    "OpenStdin": true,
    "Cmd": [
        "/bin/bash"
    ],
    "Image": "ubuntu"
;

docker.containers.create(opts, function(err, result) 
    if (!err) 
        var containerId = result.Id;
        console.log("Container", containerId, "created");
        docker.containers.start(containerId, function(err, result) 
            console.log(result);
            var ws = new WebSocket('ws://127.0.0.1:4500/v1.7/containers/' + containerId + '/attach/ws?logs=1&stderr=1&stdout=1');
            ws.on("open", function() 
                console.log("ok, open");
            );

            ws.on("message", function(msg) 
                console.log("msg", msg);
            );

            ws.on("error", function(msg) 
                console.log("error", msg);
            );
        );
     else 
        console.log(err);
    
);

它产生的输出是：

Container ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922 created

error [Error: unexpected server response (403)]

但我看到 Docker 守护进程输出如下：

Local (127.0.0.1) DNS resolver found in resolv.conf and containers can't use it. Using default external servers : [8.8.8.8 8.8.4.4]
[/var/lib/docker|f99d0d11] -job create() = OK (0)
2014/04/16 23:04:09 POST http://127.0.0.1:4500/v1.7/containers/ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922/start
[error] common.go:41 Error parsing media type:  error: mime: no media type
[/var/lib/docker|f99d0d11] +job start(ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922)
[/var/lib/docker|f99d0d11] +job allocate_interface(ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922)
[/var/lib/docker|f99d0d11] -job allocate_interface(ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922) = OK (0)
[/var/lib/docker|f99d0d11] -job start(ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922) = OK (0)
2014/04/16 23:04:09 GET /v1.7/containers/ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922/attach/ws
[/var/lib/docker|f99d0d11] +job inspect(ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922, container)
[/var/lib/docker|f99d0d11] -job inspect(ceeef5eb34acf06dad7d6fea01dd71d9b0283c63b14bc52d49585aa379ec4922, container) = OK (0)

可以看出，请求来到了守护进程，但没有迹象表明它为什么会给出 403 Forbidden 错误。

【参考方案1】：

看来我需要将127.0.0.1 更改为localhost，它神奇地起作用了。