Djangoを、Nginx+uWSGIでUNIX domain socketで動かす運用をしていたので、Websocketも一緒にUNIX domain socketで、uWSGIで管理してしまおうと思って調べたメモ

構成

環境

  • Nginx (Proxy)
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$ nginx -v
nginx/1.6.2
  • uWSGI (Emperor)
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$ python --version
Python 3.5.0

$ cat requirements.txt
uWSGI==2.0.14
redis==2.10.5

$ cat /etc/supervisor/conf.d/uwsgi.conf
[program:uwsgi]
command=/path/to/pyenv/versions/3.5.0/envs/uwsgi/bin/uwsgi --master --die-on-term --ini /etc/uwsgi/emperor.ini --emperor /etc/uwsgi/vassals
user=hoge
autostart=true
autorestart=true
  • App (Django, Websocket)
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$ python --version
Python 3.5.2

$ cat requirements.txt
Django==1.10.5
PyMySQL==0.7.10
redis==2.10.5

uWSGIの設定

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// Django
$ cat /etc/uwsgi/vassals/djangoapp.ini

[uwsgi]
# application setting
base = /var/virtualdomains/example.com/djangoapp
wsgi-file = djangoapp/wsgi.py
module = djangoapp.wsgi:application

# virtualenv setting
chdir = %(base)
virtualenv = /home/hoge/.anyenv/envs/pyenv/versions/djangoapp/

# socket setting
socket = /etc/uwsgi/sockets/%n.sock
chmod-socket = 666
uid = www-data
gid = www-data

logto = /var/log/uwsgi/%n.log
touch-reload = %(base)/../.uwsgi_reload

processes = 2
threads = 2
vacuum = true

WebSocket側は、http-websocketsの指定だけでいいのかと思ってたら、asyncとugreenの指定が必要でちょっとハマりました

よく見たら、Supported concurrency modelsにしっかり書いてありました

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// Websocket
$ cat /etc/uwsgi/vassals/ws.ini

[uwsgi]
http-websockets = true
async = 100
ugreen = true

# application setting
base = /var/virtualdomains/example.com/websocket/
wsgi-file = ws.py
module = ws:application

# virtualenv setting
chdir = %(base)
virtualenv = /home/hoge/.anyenv/envs/pyenv/versions/djangoapp/

# socket setting
socket = /etc/uwsgi/sockets/%n.sock
chmod-socket = 666
uid = www-data
gid = www-data

logto = /var/log/uwsgi/%n.log
touch-reload = %(base)/../.websocket_reload

Nginxの設定

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// Django
$ cat /etc/nginx/conf.d/django.conf

##
# HTTP server
##
server {
	listen 80;
	server_name		example.com;

    location / { try_files $uri @uwsgi; }
    location @uwsgi {
        include uwsgi_params;
        uwsgi_pass unix:/etc/uwsgi/sockets/djangoapp.sock;
    }
}
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// Websocket
$ cat /etc/nginx/conf.d/ws.conf

##
# Websocket server
##
server {
	listen 80;
	server_name		ws.example.com;

    location / { try_files $uri @uwsgi; }
    location @uwsgi {
        include uwsgi_params;
        uwsgi_pass unix:/etc/uwsgi/sockets/ws.sock;
    }
}

Nginx Proxyの設定

wsプロトコルへの対応（Upgradeヘッダの付与、Nginx 1.3.13以降である事）が必要です

Nginxのプロキシ設定にヘッダ情報を追加します

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$ cat /etc/nginx/conf.d/ws.example.com.conf

##
# Proxy server
##
server {
    client_max_body_size 100M;

    listen 80;
    server_name		ws.example.com;

    location / {
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        // 以下3行を追加
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        proxy_pass	http://xxx.xxx.xxx.xxx;
        break;
    }
}

動かしてみる

あとは、An echo serverのサンプルのままで、単純にオウム返しするだけのスクリプトが動作しました