And*_*ejD 6 nginx production-environment supervisord django-channels daphne
我已经创建了一个使用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(我将AWS EC2实例与Ubuntu Server 18.04 LTS一起使用),当使用命令运行时,daphne -b 0.0.0.0 -p 8000 mysite.asgi:application它也可以很好地工作。
但是,我无法使其与Supervisor一起使用。我遵循官方Django Channels文档(https://channels.readthedocs.io/en/latest/deploying.html)的说明,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
}
Run Code Online (Sandbox Code Playgroud)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
Run Code Online (Sandbox Code Playgroud)以这种方式设置后,该网页将无法正常工作(504网关超时)。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'
Run Code Online (Sandbox Code Playgroud)
等等
请注意,在Supervisor命令中,以不同于我之前运行的方式(其他参数集)调用了Daphne进程-除了用于地址和端口的参数外,还有用于套接字和文件描述符的参数(关于此,我不这样做)完全不了解)。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
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编辑:
当我为套接字文件创建空文件时(在Supervisor配置文件中Daphne的命令中存在),即。/run/daphne/daphne0.sock,/run/daphne/daphne1.sock等),则日志文件将说明以下内容:
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.
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问题:这些文件不应该为空吗?它们应该包括什么?
Fabio 的答案是用端点参数替换文件描述符参数,提出了解决此问题的快速解决方法(这似乎是 Daphne 代码中的错误)。
然而,Daphne 存储库中的修复很快就被提交了,因此原始指令可以正常工作。
作为旁注(对于人们仍然遇到我在原始问题中所写的严重监听失败的情况),请确保套接字文件的物理位置(/run/daphne/在我的例子中)是可访问的 - 我花了太多时间只是为了发现简单在目录daphne中创建文件夹/run可以完成这项工作(即使我使用 运行所有内容sudo)...为了预防措施,人们可以考虑将套接字文件重定向到另一个文件夹,例如,/tmp这确实允许在未经许可的情况下创建目录sudo。
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