502使用Nginx、Gunicorn和Flask的坏网关

我正在学习将我的Flask应用程序部署到Ubuntu AWS EC2实例上,并遵循 Digital Ocean tutorial . 我现在和现在都遇到了最后一个问题:我启动了Gunicorn,并使用以下命令工作: gunicorn --workers 3 --bind unix:project.sock -m 007 wsgi:app 创建3个工作线程和一个名为 project.sock .

[2018-02-23 17:14:49 +0000]  [INFO] Booting worker with pid: X
[2018-02-23 17:14:49 +0000] [INFO] Booting worker with pid: X
[2018-02-23 17:14:49 +0000]  [INFO] Booting worker with pid: X
Connection initialized.
Connection initialized.
Connection initialized.

但我在尝试让Nginx连接到 项目短袜 来自Gunicorn-a 502 Bad Gateway error .

这是我的 /etc/nginx/sites-available/project 配置:

server {
    listen 80;
    server_name MY_SERVER_DNS;

    location / {
        include proxy_params;
        proxy_pass http://unix:/home/ubuntu/flaskapp_dev/my_project/project.sock;
    }
}

对Nginx错误日志的检查表明,它得到了 Permission denied 尝试连接到我的时出错 项目短袜 :

      2018/02/23 17:26:46 [crit] 10822#10822: *4 connect() to unix:/home/ubuntu/myproject/myproject/myproject.sock failed 
(13: Permission denied) while connecting to upstream, 
        client: CLIENT_IP, server: MY_SERVER_DNS, 
        request: "GET / HTTP/1.1", 
    upstream: "http://unix:/home/ubuntu/myproject/myproject/project.sock:/", host: "MY_SERVER_DNS"

我知道有很多关于这个问题的帖子,但我注意到大多数都是围绕 uwsgi ,我这里不使用。我怀疑这显然是一个许可问题,所以我试着 chmod 711 /home/ubuntu/myproject/project 重新启动nginx,但结果相同 502网关错误 .

这个 closest SO post to my issue appears to be this one ,但没有答案或注释。