nginx - 为 Daphne 配置 Supervisor(Django channel )

Question

我创建了一个带有 Django Channels 的 Web 应用程序，在尝试使用 Supervisor 系统进行设置时遇到了问题。

首先，该应用程序在本地运行良好。

远程(我使用带有 Ubuntu Server 18.04 LTS 的 AWS EC2 实例)，当使用命令 daphne -b 0.0.0.0 -p 8000 mysite.asgi:application 运行时它也运作良好。

但是，我不能让它与主管一起工作。我按照官方 Django Channels 文档( https://channels.readthedocs.io/en/latest/deploying.html )的说明进行操作，因此我有:

nginx配置文件:

upstream channels-backend {
    server localhost:8000;
}

server {
    server_name www.example.com;

    keepalive_timeout 5;
    client_max_body_size 1m;

    access_log /home/ubuntu/django_app/logs/nginx-access.log;
    error_log /home/ubuntu/django_app/logs/nginx-error.log;

    location /static/ {
        alias /home/ubuntu/django_app/mysite/staticfiles/;
    }

    location / {
        try_files $uri @proxy_to_app;
    }

    location @proxy_to_app {
        proxy_pass http://channels-backend;

        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        proxy_redirect off;
        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_set_header X-Forwarded-Host $server_name;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/www.example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/www.example.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

server {
    listen 80;
    server_name www.example.com;

    if ($host = www.example.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    return 404; # managed by Certbot
}

主管配置文件:

[fcgi-program:asgi]

socket=tcp://localhost:8000

directory=/home/ubuntu/django_app/mysite

command=/home/ubuntu/django_app/venv/bin/daphne -u /run/daphne/daphne%(process_num)d.sock --fd 0 --access-log - --proxy-headers mysite.asgi:application

numprocs=4

process_name=asgi%(process_num)d

autostart=true
autorestart=true

stdout_logfile=/home/ubuntu/django_app/logs/supervisor_log.log
redirect_stderr=true

以这种方式设置时，网页不起作用(504 Gateway Time-out)。在主管日志文件中，我看到:

2018-11-14 14:48:21,511 INFO     Starting server at fd:fileno=0, unix:/run/daphne/daphne0.sock
2018-11-14 14:48:21,516 INFO     HTTP/2 support enabled
2018-11-14 14:48:21,517 INFO     Configuring endpoint fd:fileno=0
2018-11-14 14:48:22,015 INFO     Listening on TCP address 127.0.0.1:8000
2018-11-14 14:48:22,025 INFO     Configuring endpoint unix:/run/daphne/daphne0.sock
2018-11-14 14:48:22,026 CRITICAL Listen failure: [Errno 2] No such file or directory: '1416' -> b'/run/daphne/daphne0.sock.lock'
2018-11-14 14:48:22,091 INFO     Starting server at fd:fileno=0, unix:/run/daphne/daphne2.sock
2018-11-14 14:48:22,096 INFO     HTTP/2 support enabled
2018-11-14 14:48:22,097 INFO     Configuring endpoint fd:fileno=0
2018-11-14 14:48:22,135 INFO     Starting server at fd:fileno=0, unix:/run/daphne/daphne3.sock
2018-11-14 14:48:22,152 INFO     HTTP/2 support enabled
2018-11-14 14:48:22,153 INFO     Configuring endpoint fd:fileno=0
2018-11-14 14:48:22,237 INFO     Listening on TCP address 127.0.0.1:8000
2018-11-14 14:48:22,241 INFO     Listening on TCP address 127.0.0.1:8000
2018-11-14 14:48:22,242 INFO     Configuring endpoint unix:/run/daphne/daphne3.sock
2018-11-14 14:48:22,242 CRITICAL Listen failure: [Errno 2] No such file or directory: '1419' -> b'/run/daphne/daphne3.sock.lock'
2018-11-14 14:48:22,252 INFO     Configuring endpoint unix:/run/daphne/daphne2.sock
2018-11-14 14:48:22,252 CRITICAL Listen failure: [Errno 2] No such file or directory: '1420' -> b'/run/daphne/daphne2.sock.lock'

等等。

请注意，在 Supervisor 命令中，Daphne 进程以另一种方式调用(使用其他参数集)而不是我之前运行它 - 而不是地址和端口参数，有套接字和文件描述符的参数(我不知道这些参数)知道很多)。我怀疑这是遇到错误的原因。

任何帮助或建议将不胜感激。

相关软件包版本:

channels==2.1.2
channels-redis==2.2.1
daphne==2.2.1
Django==2.1.2

编辑:

当我为套接字文件创建空文件时(它们存在于 Supervisor 配置文件中的 Daphne 命令中)，即。 /run/daphne/daphne0.sock , /run/daphne/daphne1.sock等，然后日志文件声明如下:

2018-11-15 10:24:38,289 INFO     Starting server at fd:fileno=0, unix:/run/daphne/daphne0.sock
2018-11-15 10:24:38,290 INFO     HTTP/2 support enabled
2018-11-15 10:24:38,280 INFO     Configuring endpoint fd:fileno=0
2018-11-15 10:24:38,458 INFO     Listening on TCP address 127.0.0.1:8000
2018-11-15 10:24:38,475 INFO     Configuring endpoint unix:/run/daphne/daphne0.sock
2018-11-15 10:24:38,476 CRITICAL Listen failure: Couldn't listen on any:b'/run/daphne/daphne0.sock': [Errno 98] Address already in use.

问题:这些文件不应该是空的吗？他们应该包括什么？

Answer 1

在主管 ASGI 配置文件中，在以下行中
command=/home/ubuntu/django_app/venv/bin/daphne -u /run/daphne/daphne%(process_num)d.sock --fd 0 --access-log - --proxy-headers mysite.asgi:application
替换 --fd 0与 --endpoint fd:fileno=0 .

问题:https://github.com/django/daphne/issues/234