Nginx的连接（）失败（111：连接被拒绝），同时连接到上游

我运行的网站使用Django，Nginx，Gunicorn，Supervisord和fail2ban（只允许ssh，http和https）。 该网站是生活和正常工作，但有一些nginx错误日志条目涉及：

connect() failed (111: Connection refused) while connecting to upstream, client: xxxx, server: www.example.com, request: "GET /example/url/to/get/ HTTP/1.1", upstream: "http://[::1]:8000/example/url/to/get/", host: "www.example.com" upstream server temporarily disabled while connecting to upstream, client: xxxx, server: www.example.com, request: "GET /example/url/to/get/ HTTP/1.1", upstream: "http://[::1]:8000/example/url/to/get/", host: "www.example.com" 

这是我的nginxconfiguration：

 upstream app_server_wsgiapp { server localhost:8000 fail_timeout=0; } server { listen 80; server_name www.example.com; return 301 https://www.example.com$request_uri; } server { server_name www.example.com; listen 443 ssl; if ($host = 'example.com') { return 301 https://www.example.com$request_uri; } ssl_certificate /etc/nginx/example/example.crt; ssl_certificate_key /etc/nginx/example/example.key; ssl_session_timeout 1d; ssl_session_cache shared:SSL:50m; ssl_protocols TLSv1.1 TLSv1.2; ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA- AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM- SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM- SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128- SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256- SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA- AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128- SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256- SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256- SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3- SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES- CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA'; ssl_prefer_server_ciphers on; access_log /var/log/nginx/www.example.com.access.log; error_log /var/log/nginx/www.example.com.error.log info; keepalive_timeout 5; proxy_read_timeout 120s; # nginx serve up static and media files location /static { autoindex on; alias /static/path; } location /media { autoindex on; alias /media/path; } location / { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; if (!-f $request_filename) { proxy_pass http://app_server_wsgiapp; break; } } } 

我在Gunicorn日志中没有任何错误。

就像我说的，该网站正常工作。 但我不想忽略错误日志，以后可能会成为一个更大的问题。

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 upstream app_server_wsgiapp { server 127.0.0.1:8000 fail_timeout=0; }