如何从lxc容器内部提供websocket应用程序?

时间:2015-12-08 20:43:47

标签: ruby nginx websocket lxc

lxc内部容器中,我正在运行faye个应用

Gemfile

source 'https://rubygems.org'
gem 'faye'
gem 'thin'

config.ru

require 'faye'
Faye::WebSocket.load_adapter('thin')
bayeux = Faye::RackAdapter.new(:mount => '/faye', :timeout => 25)
run bayeux

然后

$ thin start

/etc/nginx/sites-available/domain.com

server {
    server_name   domain.com;
    location /faye {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
    }
}

在主持人身上:

/etc/nginx/sites-available/domain.com

server {
    server_name   domain.com;
    location / {
        proxy_pass   http://10.0.0.109:80;
        proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
        proxy_set_header   X-Real-IP   $remote_addr;
        proxy_set_header   Host   $http_host;
    }
}

然后,我尝试从herews://domain.com/faye)连接到它,但它失败了。我做错了什么?

该应用说:

Using rack adapter
Thin web server (v1.6.4 codename Gob Bluth)
Maximum connections set to 1024
Listening on 0.0.0.0:3000, CTRL+C to stop

访客nginx访问日志:

10.0.0.1 - - [09/Dec/2015:11:03:21 +0200] "GET /faye?encoding=text HTTP/1.0" 400 11 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36"

主机nginx访问日志:

11.111.111.111 - - [09/Dec/2015:11:03:21 +0200] "GET /faye?encoding=text HTTP/1.1" 400 21 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36"

chrome的开发者工具控制台:

  

与'ws://domain.com/faye?encoding = text'的WebSocket连接失败:WebSocket握手期间出错:意外响应代码:400

我试图在客人身上运行Myst建议的应用程序。

Gemfile

source 'https://rubygems.org'
gem 'plezi'

app.rb

#!/usr/bin/env ruby
# require the gems
require 'bundler'
Bundler.require(:default, ENV['ENV'].to_s.to_sym)
# handle requests
class MyController
    # Http
    def index
        Iodine.log request_data_string
    end
    # Websockets
    def on_message data
        write ERB::Util.html_escape(data)
    end
    def pre_connect
        puts Iodine.log(request_data_string)
        true
    end
    def on_open
        write 'Welcome!'
    end
    # formatting the request data
    protected
    def request_data_string
        out = String.new
        out << "Request headers:\n"
        out << (request.headers.to_a.map {|p| p.join ': '} .join "\n")
        out << "\n\nRequest cookies:\n"
        out << (request.cookies.to_a.map {|p| p.join ': '} .join "\n")
        out << "\n\nAll request data:\n"
        out << (request.to_a.map {|p| p.join ': '} .join "\n")
        out
    end
end
route '*', MyController
# # you can also set up logging to a file:
# Plezi.logger = Logger.new("filename.log")

然后

$ ruby app.rb

/etc/nginx/sites-available/domain.com

server {
    server_name   domain.com;
    location / {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
    }
}

当我连接到ws://domain.com/时,应用说:

Iodine 0.1.19 is listening on port 3000
Plezi is feeling optimistic running version 0.12.21.

Press ^C to stop the server.
Request headers:
connection: upgrade
host: localhost:3000
x-forwarded-for: 11.111.111.111
pragma: no-cache
cache-control: no-cache
origin: http://www.websocket.org
sec-websocket-version: 13
user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36
accept-encoding: gzip, deflate, sdch
accept-language: en-US,en;q=0.8
sec-websocket-key: Qs2LMnJ12SjclOxlrYKwlg==
sec-websocket-extensions: permessage-deflate; client_max_window_bits

Request cookies:


All request data:
io: #<Iodine::Http::Http1:0x007fd5a0006b08>
cookies: {}
params: {:encoding=>"text"}
method: GET
query: /?encoding=text
version: 1.1
time_recieved: 2015-12-09 11:24:16 +0200
connection: upgrade
host: localhost:3000
x-forwarded-for: 11.111.111.111
pragma: no-cache
cache-control: no-cache
origin: http://www.websocket.org
sec-websocket-version: 13
user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36
accept-encoding: gzip, deflate, sdch
accept-language: en-US,en;q=0.8
sec-websocket-key: Qs2LMnJ12SjclOxlrYKwlg==
sec-websocket-extensions: permessage-deflate; client_max_window_bits
headers_complete: true
client_ip: 11.111.111.111
scheme: http
host_name: localhost
port: 3000
path:
original_path: /
query_params: encoding=text
host_settings: {:index_file=>"index.html", :assets_public=>"/assets", :public=>nil, :assets_public_regex=>/^\/assets\//i, :assets_public_length=>8, :assets_refuse_templates=>/(erb|coffee|scss|sass|\.\.\/)$/i}11.111.111.111 [2015-12-09 09:24:16 UTC] "GET / http/1.1" 200 1659 0.6ms

访客nginx访问日志:

10.0.0.1 - - [09/Dec/2015:10:55:44 +0200] "GET /?encoding=text HTTP/1.0" 200 1526 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36"

主机nginx访问日志:

11.111.111.111 - - [09/Dec/2015:10:55:44 +0200] "GET /?encoding=text HTTP/1.1" 200 1526 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36"

chrome的开发者工具控制台:

  

与'ws://domain.com/?encoding = text'的WebSocket连接失败:WebSocket握手期间出错:意外响应代码:200

2 个答案:

答案 0 :(得分:1)

这不是一个答案,只是我对如何调试问题的想法。

将请求的标头输出到日志将提供有关该问题的更多信息(在代理标头更改后,应用程序看到的标头可能与预期不同)。

这里是一个使用Plezi的小应用程序,它既是websocket Echo服务器,也应该将标题打印到日志中(默认日志是STDOUT,但你也可以使用文件),允许你查看nginx设置和请求标头:

gemfile

gem plezi

使用thin或任何其他服务器非常重要 ,因为Plezi使用它自己的碘服务器。

app.rb文件:

#!/usr/bin/env ruby
# require the gems
require 'bundler'
Bundler.require(:default, ENV['ENV'].to_s.to_sym)
# handle requests
class MyController
    # Http
    def index
        Iodine.log request_data_string
    end
    # Websockets
    def on_message data
        write ERB::Util.html_escape(data)
    end
    def pre_connect
        puts Iodine.log(request_data_string)
        true
    end
    def on_open
        write 'Welcome!'
    end
    # formatting the request data
    protected
    def request_data_string
        out = String.new
        out << "Request headers:\n"
        out << (request.headers.to_a.map {|p| p.join ': '} .join "\n")
        out << "\n\nRequest cookies:\n"
        out << (request.cookies.to_a.map {|p| p.join ': '} .join "\n")
        out << "\n\nAll request data:\n"
        out << (request.to_a.map {|p| p.join ': '} .join "\n")
        out
    end
end
route '*', MyController
# # you can also set up logging to a file:
# Plezi.logger = Logger.new("filename.log")

开始:

ruby app.rb

或(使用任何端口号,默认为3000):

./app.rb -p 3000

这应该是一个足够好的应用程序,用于测试和调试任何标头。

在您的问题中发布标题数据以获取任何进一步的帮助。可能是没有正确解析标题以进行websocket连接。

修改

我注意到Plezi给出的响应是200 OK状态代码 - 意味着该请求被假定为Http请求。

这意味着它可能是一个标题问题,因为该请求未被识别为websocket升级请求。

编辑2

在我的机器上,以下设置允许我代理Http请求和Websocket请求(但我使用Plezi,它允许我使用Websockets,Plezi的Http和Rack应用程序(即Rails) )在同一个港口):

    location / {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $http_connection;
    }

...但你的配置也有效(只是混乱了Http&#39; s keep-alive,而不是websockets)......

...所以我怀疑是否发现了这个问题。

答案 1 :(得分:0)

可能更容易设置的方法是从主机js直接代理到应用:

nginx(主持人):

/etc/nginx/sites-available/domain.com

但是如果你想拥有相同的nginx配置,无论应用程序是在主机上还是在guest虚拟机上运行,​​你都可以用两个server { server_name domain.com; location / { proxy_pass http://10.0.0.109:3000; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection 'upgrade'; } } 来代理它。

nginx(主持人):

/etc/nginx/sites-available/domain.com

在此处传递server { server_name domain.com; location / { proxy_pass http://10.0.0.109:80; proxy_set_header Host $http_host; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection 'upgrade'; } } 标题至关重要。否则,guest Host可能会让错误的虚拟主机处理请求。这是我在很长一段时间内无法实现的。

nginx(嘉宾):

/etc/nginx/sites-available/domain.com