我之前用asp.net core做了一個網站，在IIS運作良好。
現在我用Nginx修改為centos8。
透過URL該專案在centos8中運作良好http://0.0.0.0:5001
Nginx 用於反向代理伺服器。但是，我透過本地電腦造訪該網站後，卻502 Bad Gateway報錯。
以下是日誌error.log：
2020/01/24 08:47:47 [notice] 1#1: using the "epoll" event method
2020/01/24 08:47:47 [notice] 1#1: nginx/1.17.7
2020/01/24 08:47:47 [notice] 1#1: built by gcc 8.3.0 (Debian 8.3.0-6)
2020/01/24 08:47:47 [notice] 1#1: OS: Linux 4.18.0-147.3.1.el8_1.x86_64
2020/01/24 08:47:47 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2020/01/24 08:47:47 [notice] 1#1: start worker processes
2020/01/24 08:47:47 [notice] 1#1: start worker process 6
2020/01/24 08:47:49 [error] 6#6: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 113.109.81.57, server: www.sealribbon.com, request: "GET / HTTP/1.1", upstream: "http://0.0.0.0:5001/", host: "www.sealribbon.com"
2020/01/24 08:47:50 [error] 6#6: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 113.109.81.57, server: www.sample.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://0.0.0.0:5001/favicon.ico", host: "www.sealribbon.com", referrer: "https://www.sample.com/"
2020/01/24 08:47:59 [info] 6#6: *1 client 113.109.81.57 closed keepalive connection
2020/01/24 08:47:59 [info] 6#6: *2 client closed connection while waiting for request, client: 113.109.81.57, server: 0.0.0.0:443
這是我的nginx.conf：
user root;
worker_processes 1;
error_log /var/log/nginx/error.log info;
worker_rlimit_nofile 1024;
events {
worker_connections 1024;
}
http {
proxy_http_version 1.1;
proxy_connect_timeout 600;
proxy_read_timeout 600;
proxy_send_timeout 600;
client_max_body_size 50m;
include 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;
keepalive_timeout 65;
gzip on;
sendfile on;
gzip_buffers 16 8k;
gzip_comp_level 2;
gzip_http_version 1.1;
gzip_min_length 256;
gzip_proxied any;
gzip_vary on;
gzip_types
text/xml application/xml application/atom+xml application/rss+xml application/xhtml+xml image/svg+xml
text/javascript application/javascript application/x-javascript
text/x-json application/json application/x-web-app-manifest+json
text/css text/plain text/x-component
font/opentype font/ttf application/x-font-ttf application/vnd.ms-fontobject
image/x-icon image/jpeg image/gif image/png;
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}
upstream backend {
server 0.0.0.0;
}
server {
listen 80;
server_name www.sample.com *.sample.com;
return 301 https://$server_name$request_uri;
}
server {
listen 443 ssl;
server_name www.sample.com *.sample.com;
ssl_certificate /etc/nginx/cert/3390293_sample.com.pem;
ssl_certificate_key /etc/nginx/cert/3390293_sample.com.key;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_session_timeout 5m;
location / {
proxy_pass http://0.0.0.0:5001;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_redirect off;
index index.html;
}
}
}
google了一下，類似的問題好像還有很多。
有人說我應該使用setsebool -P httpd_can_network_connect 1
我嘗試過，但問題仍然存在。
我只是個初學者。請告訴我該如何解決？謝謝。
答案1
0.0.0.0不是有效的 IP 位址。輸入您的後端伺服器的正確位址。
答案2
感謝@Gerald Schneider 的幫助。
我修改了這兩段程式碼：upstream backend { server 172.18.92.125:5001; }
代理通行證http://172.18.92.125:5001;
最後，它起作用了。