nginxリバースプロキシの背後にあるシンWebサーバーで実行されているwebsocket-rails gemを備えたRuby on Rails 3.2アプリがあります。
nginx リバース プロキシを除いて、すべて正常に動作します。nginx リバース プロキシを削除することで、websocket 通信は正常に機能します。(開発と生産の両方)。nginx を websocket のリバース プロキシとして使用すると、問題が発生します。
Nginxバージョン 1.3.13 以降では、websocket プロキシをサポートできるはずです。ドキュメントhereおよびhereに基づいて、次の nginx 構成を作成しました。
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}
upstream ravecy {
server localhost:3000;
server localhost:3001;
}
server {
listen 80;
server_name test.ravecy.com;
root /var/www/ravecy.com/public;
location / {
try_files $uri @ravecy;
}
location @ravecy {
proxy_pass http://ravecy;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_redirect off;
}
}
残念ながら、これは機能しません。理由は正確にはわかりませんが、ログからわかるように、nginx は Websocket 接続の試行を Websocket 接続としてではなく、通常の HTTP 接続として処理しているように思えます。
==> production.log <==
Started GET "/chat" for 82.170.121.62 at 2013-04-10 12:20:12 +0200
Processing by ApplicationController#chat as HTML
Rendered application/chat.html.erb within layouts/frontend (0.2ms)
Rendered layouts/frontend/_navbar.html.erb (6.3ms)
Rendered layouts/shared/_alert.html.erb (0.0ms)
Rendered layouts/frontend/_facebook_sdk.html.erb (0.0ms)
Completed 200 OK in 9ms (Views: 8.4ms | ActiveRecord: 0.4ms)
Started GET "/websocket" for 82.170.121.62 at 2013-04-10 12:20:12 +0200
==> websocket_rails.log <==
I [2013-04-10 12:20:12.744] [ConnectionManager] Connection opened: #<Connnection::47398780>
I [2013-04-10 12:20:12.745] [Dispatcher] Started Event: client_connected
I [2013-04-10 12:20:12.745] [Dispatcher] Name: client_connected
I [2013-04-10 12:20:12.745] [Dispatcher] Data: {"connection_id"=>47398780}
I [2013-04-10 12:20:12.745] [Dispatcher] Connection: #<Connnection::47398780>
I [2013-04-10 12:20:12.747] [Dispatcher] Event client_connected Finished in 0.001960819 seconds
==> /var/log/nginx/access.log <==
82.170.121.62 - - [10/Apr/2013:12:20:12 +0200] "GET /chat HTTP/1.1" 200 854 "http://test.ravecy.com/posts" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/536.26.17 (KHTML, like Gecko) Version/6.0.2 Safari/536.26.17"
82.170.121.62 - - [10/Apr/2013:12:20:12 +0200] "GET /assets/frontend-6ad91089203a6026624ce015c2800492.css HTTP/1.1" 304 0 "http://test.ravecy.com/chat" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/536.26.17 (KHTML, like Gecko) Version/6.0.2 Safari/536.26.17"
82.170.121.62 - - [10/Apr/2013:12:20:12 +0200] "GET /assets/frontend-98fa493fc9f482c0d44b31bda5a89135.js HTTP/1.1" 304 0 "http://test.ravecy.com/chat" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/536.26.17 (KHTML, like Gecko) Version/6.0.2 Safari/536.26.17"
==> websocket_rails.log <==
I [2013-04-10 12:20:12.832] [ConnectionManager] Connection closed: #<Connnection::47398780>
I [2013-04-10 12:20:12.832] [Dispatcher] Started Event: client_disconnected
I [2013-04-10 12:20:12.832] [Dispatcher] Name: client_disconnected
I [2013-04-10 12:20:12.832] [Dispatcher] Data: nil
I [2013-04-10 12:20:12.832] [Dispatcher] Connection: #<Connnection::47398780>
I [2013-04-10 12:20:12.833] [Dispatcher] Event client_disconnected Finished in 0.000293462 seconds
==> /var/log/nginx/access.log <==
82.170.121.62 - - [10/Apr/2013:12:20:12 +0200] "GET /websocket HTTP/1.1" 200 398 "-" "-"
接続を維持する必要がある場合でも、接続は 100 ミリ秒以内に閉じられることに注意してください。
さらなる設定: nginx.conf:
user www-data;
worker_processes 4;
pid /run/nginx.pid;
events {
worker_connections 768;
}
http {
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
gzip on;
gzip_disable "msie6";
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}
薄い構成:
---
chdir: /var/www/ravecy.com
environment: production
address: 127.0.0.1
port: 3000
timeout: 30
log: log/thin.log
pid: tmp/pids/thin.pid
max_conns: 1024
max_persistent_conns: 100
require: []
wait: 30
servers: 2
daemonize: true
nginx バージョン: nginx/1.3.15 ライブ URL の例: http://test.ravecy.com/chat
またnew WebSocket("ws://test.ravecy.com/websocket")
、JS コンソールで実行すると、ブラウザーに「予期しない応答コード: 200」というメッセージが表示されます。
私はこれを機能させるためにかなり必死で、もう何をすべきかわかりません。
Telnet の結果 NGINX:
GET /websocket HTTP/1.1
Host: test.ravecy.com
Connection: Upgrade
Upgrade: WebSocket
HTTP/1.1 200 OK
Server: nginx/1.3.15
Date: Sat, 13 Apr 2013 19:50:35 GMT
Content-Type: text/json
Transfer-Encoding: chunked
Connection: keep-alive
152
[["client_connected",{"id":null,"channel":null,"data":{"connection_id":37160040},"success":null,"result":null,"server_token":null}]][["users",{"id":null,"channel":null,"data":[],"success":null,"result":null,"server_token":null}]][["client_connected",{"id":null,"channel":null,"data":{},"success":false,"result":null,"server_token":null}]]
Telnet の結果はシンに直接送信されます。
GET /websocket HTTP/1.1
Host: test.ravecy.com
Connection: Upgrade
Upgrade: WebSocket
HTTP/1.1 101 Web Socket Protocol Handshake
Upgrade: WebSocket
Connection: Upgrade
WebSocket-Origin:
WebSocket-Location: ws://test.ravecy.com/websocket
[["client_connected",{"id":null,"channel":null,"data":{"connection_id":37489460},"success":null,"result":null,"server_token":null}]][["users",{"id":null,"channel":null,"data":[],"success":null,"result":null,"server_token":null}]][["client_connected",{"id":null,"channel":null,"data":{},"success":false,"result":null,"server_token":null}]]
明らかに、これは問題が発生した場合です。しかし、なぜ?