django - NGINX 502 错误网关 gunicorn 超时

Question

将数据保存到数据库时弹出 502 bad gateway 错误。

一旦用户登录到 django 应用程序 (OLE 7)。从 ldap 服务器中提取有关该用户的数据并保存在我的本地数据库(postgres)中。配置 nginx、gunicorn 后，它在本地服务器上运行良好，一旦用户登录网站而不是显示检索到的数据，它会显示 502 Bad gateway。我浏览了很多关于这个的 stackoverflow 帖子，有人说增加超时，检查 gunicorn 是否正在运行。我已经尝试了所有这些，但仍然无法正常工作。

nginx.conf

    user  nginx;
worker_processes  2;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
worker_connections  1024;
}
er  nginx;
worker_processes  2;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
  worker_connections  1024;
}


http {
include       /etc/nginx/mime.types;
default_type  application/octet-stream;

log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                  '$status $body_bytes_sent "$http_referer" '
                  '"$http_user_agent" "$http_x_forwarded_for"';

access_log  /var/log/nginx/access.log  main;

sendfile        on;
#tcp_nopush     on;

keepalive_timeout  300;

#gzip  on;
upstream app_server {
    server 10.111.xxx.xxx:8001 fail_timeout=0;
}

server{
 listen 80;
 server_name 10.111.xxx.xxx;
 location = /favicon.ico { access_log off; log_not_found off; }
 location /static/ {root /home/lisa/revcon;}
 location / {
    proxy_set_header Host $http_host;
    proxy_set_header Connection "";
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_pass http://unix:/home/lisa/revcon/revcon.sock;
    proxy_connect_timeout 500s;
    proxy_read_timeout 600s;
}

views.py

 def save_information(request):

associate_id = id_to_numeric(request.user.username)
ldap = Ldap()

associate_details = ldap.search(associate_id=associate_id)[0]

details = UserDetails(
    associate_name=associate_details['name'],
    associate_nbr=associate_id,
    associate_email=associate_details['email'],
   associate_department_id=id_to_numeric(associate_details['department']),
    associate_mgr=associate_details['managerCN'],
    associate_exec=associate_details['execCN'],
    associate_org=associate_details['org'],
    associate_image=img,
    date_of_service=rcm_date,
    title=associate_details['title'],
    client=client,
    lob=lob,
    phone_number=associate_details['mobile'],
)
details.save()
messages.success(request, 'Profile created! ')
return redirect('/?submit=true')

nginx 错误日志如下所示:

2019/05/15 04:01:55 [error] 7602#7602: *1 upstream prematurely closed connection while reading response header from upstream, client: 10.111.044.xxx, server: 10.111.xxx.xxx, request: "POST /save_information HTTP/1.1", upstream: "http://unix:/home/lisa/revcon/revcon.sock:/save_information", host: "10.111.xxx.xxx", referrer: "http://10.111.xxx.xxx/pr/"

unicorn 从“django_session”中选择“django_session”。“session_key”，“django_session”，“session_data”，“django_session”。 expire_date"> '2019-05-15T09:04:53.974657+00:00'::timestamptz); args=('hzy3dsjxfzqxhds6kd5uyteux0gps9d1', datetime.datetime(2019, 5, 15, 9, 4, 53, 974657, tzinfo=))
(0.001) 选择“auth_user”。 ", "auth_user"."last_name", "auth_user"."email", "auth_user"."is_staff", "auth_user"."is_active", "auth_user"."date_joined"FROM "auth_user"WHERE "auth_user". “编号”= 1；参数=(1，)
(0.001) SELECT (1) AS "a"FROM "CollectData_userdetails"WHERE "CollectData_userdetails"."associate_nbr"= '050667' LIMIT 1; args=(u'050667',)
解析模板“CreateUser.html”中的变量“img”时出现异常。
追溯(最近一次通话):
文件“/home/lisa/revcon/env/lib/python2.7/site-packages/django/template/base.py”，第 903 行，在 _resolve_lookup
(bit, current)) # 缺失的属性
VariableDoesNotExist:在 u'[{\'False\': False,\'None\': None,\'True\': True}, {u\'csrf_token\': ,\' 中查找键 [img] 失败user\': >,\'perms\': ,\'DEFAULT_MESSAGE_LEVELS\': {\'DEBUG\': 10,\'INFO\': 20,\'WARNING\': 30,\'SUCCESS\': 25,\'ERROR\': 40},\'messages\': , u\'request\': }, {}, {\'form\': }, {\'block\':\n, ,\n\n\n\n, , , , 关联\'>, , , , , , , , , ,\n\n\t\t\t , ,\\n\\t\\t\\t , ,\\n]>}]'
解析模板“bootstrap4/field.html”中的变量“标签”时出现异常。


它点击了这个 urlurl('save_information', views.save_information, name='save_information'),然后失败。 502 错误。

Answer 1

我想通了。在我服务的/etc/systemd/system/gunicorn 中的 gunicorn.service 文件中。我做了一个改变:增加了超时时间。 gunicorn 的默认超时时间为 30 秒，因此我更新为 120 秒。

[Unit]
Description=gunicorn daemon
After=network.target

[Service]
User=lisa
Group=nginx
Restart=on-failure
WorkingDirectory=/home/lisa/revcon
ExecStart=/home/lisa/revcon/env/bin/gunicorn --**timeout 120** --workers 5 
--bind unix:/home/lisa/revcon/env.sock revcon.wsgi:application

[Install]
WantedBy=multi-user.target
~

它对我来说效果很好。