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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)

    $ nginx -v
    nginx/1.6.2

• uWSGI (Emperor)

    $ 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)

    $ 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

// 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

// 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

// 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;
    }
}

// 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

    $ 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