问504 NGINX反向代理上的网关超时，即使容器已打开

EN

# wildfly.example.com
upstream wildfly.example.com {
                                # Cannot connect to network of this container
                                server 172.17.0.5:8080 weight=100 max_fails=5 fail_timeout=5;
}
server {
        server_name wildfly.example.com;
        listen 80 ;
        access_log /var/log/nginx/access.log vhost;
        # Do not HTTPS redirect Let'sEncrypt ACME challenge
        location /.well-known/acme-challenge/ {
                auth_basic off;
                allow all;
                root /usr/share/nginx/html;
                try_files $uri =404;
                break;
        }
        location / {
                return 301 https://$host$request_uri;
        }
}
server {
        server_name wildfly.example.com;
        listen 443 ssl http2 ;
        access_log /var/log/nginx/access.log vhost;
        ssl_session_timeout 5m;
        ssl_session_cache shared:SSL:50m;
        ssl_session_tickets off;
        ssl_certificate /etc/nginx/certs/wildfly.example.com.crt;
        ssl_certificate_key /etc/nginx/certs/wildfly.example.com.key;
        ssl_dhparam /etc/nginx/certs/wildfly.example.com.dhparam.pem;
        ssl_stapling on;
        ssl_stapling_verify on;
        ssl_trusted_certificate /etc/nginx/certs/wildfly.example.com.chain.pem;
        add_header Strict-Transport-Security "max-age=31536000" always;
        include /etc/nginx/vhost.d/default;
        location / {
                proxy_pass http://wildfly.example.com;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $server_addr:$server_port;
                proxy_set_header X-Real-IP $remote_addr;
        }
}

2020/06/04 14:14:37 [error] 22247#22247: *6228 upstream timed out (110: Connection timed out) while connecting to upstream, client: IPHERE, server: wildfly.example.com, request: "GET / HTTP/2.0", upstream: "http://172.17.0.5:8080/", host: "wildfly.example.com"