由于权限不足，nginx 无法连接到我的套接字

Question

我有以下设置来为实例nginx提供uwsgi 服务cgit。

# cat /etc/uwsgi.d/cgit.ini 
[uwsgi]
plugins = cgi

uid = nginx
gid = nginx

socket = /srv/http/cgit/cgit.sock
procname-master = uwsgi cgit
processes = 1
threads = 2
cgi = /srv/http/cgit/htdocs/cgit.cgi

logto = /srv/http/cgit/logs/uwsgi.log

uwsgi 实例运行正常（配置文件中没有任何异常），套接字权限似乎正确，即nginx所有者。我仔细检查了一下，用户nginx是否可以访问目录并查看套接字。

# ls -la /srv/http/cgit
total 20
drwxr-xr-x. 5 nginx nginx 4096 Oct 29 14:09 .
drwxr-xr-x. 3 nginx nginx 4096 Oct 29 12:59 ..
drwxrwxr-x. 6 nginx nginx 4096 Oct 29 14:06 build
srwxr-xr-x. 1 nginx nginx    0 Oct 29 14:28 cgit.sock
drwxr-xr-x. 2 nginx nginx 4096 Oct 29 14:06 htdocs
drwxr-xr-x. 2 nginx nginx 4096 Oct 29 13:54 logs

我的 nginx 配置如下：

user nginx;

worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

events {
    worker_connections 1024;
}

http {
    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;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

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

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }

        location /cgit-web {
            rewrite ^/cgit-web(/.*)$ $1 break;
            root /srv/http/cgit/build;
        }

        location /cgit {
            try_files $uri @cgit;
        }

        location @cgit {
            gzip off;
            include uwsgi_params;
            uwsgi_modifier1 9;
            uwsgi_pass unix:/srv/http/cgit/cgit.sock;
        }

    }
}

用户是nginx，并且套接字文件的路径也正确。现在，尝试访问时/cgit，我在 nginx 的错误日志中发现以下消息：

*6 connect() to unix:/srv/http/cgit/cgit.sock failed (13: Permission denied) while connecting to upstream, client: x.x.x.x, server: _, request: "GET /cgit HTTP/1.1", upstream: "uwsgi://unix:/srv/http/cgit/cgit.sock:", host: "xxx"

我哪些权限弄错了？为什么无法nginx访问套接字？

---

问题出在 SELinux 上。谢谢！