{"id":19651,"date":"2024-10-26T09:11:58","date_gmt":"2024-10-26T01:11:58","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers\/"},"modified":"2025-04-10T09:15:46","modified_gmt":"2025-04-10T01:15:46","slug":"how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/knowledge\/how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers\/","title":{"rendered":"\u5982\u4f55\u89e3\u51b3\u9999\u6e2f\u670d\u52a1\u5668\u7684 NGINX 502 Bad Gateway \u95ee\u9898\uff1f"},"content":{"rendered":"<p>\u5728<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/hk\/cn2\/\" target=\"_blank\">\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528<\/a>\u73af\u5883\u4e2d\u8fd0\u884c\u65f6\uff0c\u9047\u5230 NGINX \u53cd\u5411\u4ee3\u7406\u8bbe\u7f6e\u4e2d\u7684 502 Bad Gateway \u9519\u8bef\u53ef\u80fd\u4f1a\u4ee4\u4eba\u70e6\u607c\u3002\u672c\u6307\u5357\u5c06\u6df1\u5165\u63a2\u8ba8\u5b9e\u7528\u89e3\u51b3\u65b9\u6848\uff0c\u5e76\u9644\u5e26\u5b9e\u9645\u793a\u4f8b\u548c\u7ecf\u8fc7\u5b9e\u6218\u68c0\u9a8c\u7684\u914d\u7f6e\u3002<\/p>\n<h2><strong>\u7406\u89e3 NGINX \u4e2d\u7684 502 Bad Gateway<\/strong><\/h2>\n<p>502 Bad Gateway \u8868\u793a\u60a8\u7684 NGINX \u670d\u52a1\u5668\u4f5c\u4e3a\u53cd\u5411\u4ee3\u7406\u65e0\u6cd5\u4ece\u4e0a\u6e38\u670d\u52a1\u5668\u83b7\u5f97\u6709\u6548\u54cd\u5e94\u3002\u5728\u9999\u6e2f\u7684\u670d\u52a1\u5668\u73af\u5883\u4e2d\uff0c\u8fd9\u901a\u5e38\u6e90\u4e8e\u7f51\u7edc\u5ef6\u8fdf\u3001\u9632\u706b\u5899\u914d\u7f6e\u6216\u8d44\u6e90\u9650\u5236\u3002<\/p>\n<p>\u5e38\u89c1\u89e6\u53d1\u56e0\u7d20\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4e0a\u6e38\u670d\u52a1\u5668\u5b95\u673a<\/li>\n<li>PHP-FPM \u5957\u63a5\u5b57\u901a\u4fe1\u95ee\u9898<\/li>\n<li>\u5de5\u4f5c\u8fde\u63a5\u6570\u4e0d\u8db3<\/li>\n<li>\u5185\u5b58\u9650\u5236<\/li>\n<li>\u7f51\u7edc\u8d85\u65f6\u8bbe\u7f6e<\/li>\n<\/ul>\n<h2><strong>\u5feb\u901f\u8bca\u65ad\u6b65\u9aa4<\/strong><\/h2>\n<p>\u9996\u5148\uff0c\u68c0\u67e5\u60a8\u7684 NGINX \u670d\u52a1\u72b6\u6001\uff1a<\/p>\n<pre><code>systemctl status nginx\r\ntail -f \/var\/log\/nginx\/error.log<\/code><\/pre>\n<p>\u8ba9\u6211\u4eec\u68c0\u67e5\u60a8\u7684 NGINX \u914d\u7f6e\u4e2d\u7684\u6f5c\u5728\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5178\u578b\u7684\u53cd\u5411\u4ee3\u7406\u8bbe\u7f6e\uff0c\u5e76\u6807\u51fa\u4e86\u5e38\u89c1\u95ee\u9898\uff1a<\/p>\n<pre><code>server {\r\n    listen 80;\r\n    server_name example.com;\r\n\r\n    location \/ {\r\n        proxy_pass http:\/\/backend_server;\r\n        proxy_buffers 16 4k;\r\n        proxy_buffer_size 2k;\r\n        proxy_connect_timeout 300;\r\n        proxy_send_timeout 300;\r\n        proxy_read_timeout 300;\r\n        proxy_busy_buffers_size 64k;\r\n    }\r\n}<\/code><\/pre>\n<h2><strong>\u5e38\u89c1\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6848<\/strong><\/h2>\n<p>1. PHP-FPM \u5957\u63a5\u5b57\u95ee\u9898<\/p>\n<p>\u68c0\u67e5 PHP-FPM \u72b6\u6001\u548c\u5957\u63a5\u5b57\u6743\u9650\uff1a<\/p>\n<pre><code>ls -la \/var\/run\/php-fpm\/php-fpm.sock\r\nsystemctl status php-fpm<\/code><\/pre>\n<p>\u5982\u679c\u7f3a\u5c11\u5957\u63a5\u5b57\u6587\u4ef6\uff0c\u9a8c\u8bc1 PHP-FPM \u914d\u7f6e\uff1a<\/p>\n<pre><code>listen = \/var\/run\/php-fpm\/php-fpm.sock\r\nlisten.owner = nginx\r\nlisten.group = nginx\r\nlisten.mode = 0660<\/code><\/pre>\n<p>2. \u5185\u5b58\u9650\u5236<\/p>\n<p>\u9488\u5bf9\u9999\u6e2f\u670d\u52a1\u5668\u73af\u5883\uff0c\u4f18\u5316\u60a8\u7684\u5185\u5b58\u8bbe\u7f6e\uff1a<\/p>\n<pre><code>worker_processes auto;\r\nworker_rlimit_nofile 65535;\r\nevents {\r\n    worker_connections 65535;\r\n    use epoll;\r\n    multi_accept on;\r\n}<\/code><\/pre>\n<h2><strong>NGINX \u914d\u7f6e\u4f18\u5316<\/strong><\/h2>\n<p>\u5b9e\u65bd\u8fd9\u4e9b\u4ee3\u7406\u8bbe\u7f6e\u4ee5\u63d0\u9ad8\u7a33\u5b9a\u6027\uff1a<\/p>\n<pre><code>http {\r\n    proxy_buffer_size 128k;\r\n    proxy_buffers 4 256k;\r\n    proxy_busy_buffers_size 256k;\r\n    proxy_temp_file_write_size 256k;\r\n    proxy_connect_timeout 300s;\r\n    proxy_send_timeout 300s;\r\n    proxy_read_timeout 300s;\r\n}<\/code><\/pre>\n<h2><strong>\u7cfb\u7edf\u7ea7\u6545\u969c\u6392\u9664<\/strong><\/h2>\n<p>\u4f7f\u7528\u8fd9\u4e9b\u547d\u4ee4\u76d1\u63a7\u7cfb\u7edf\u8d44\u6e90\uff1a<\/p>\n<pre><code># \u68c0\u67e5\u5f53\u524d\u8fde\u63a5\u6570\r\nnetstat -anp | grep :80 | wc -l\r\n\r\n# \u76d1\u63a7\u5b9e\u65f6\u8fde\u63a5\r\nwatch -n1 \"netstat -anp | grep :80 | wc -l\"\r\n\r\n# \u68c0\u67e5\u5185\u5b58\u95ee\u9898\r\nfree -m\r\nvmstat 1<\/code><\/pre>\n<p>\u5728 \/etc\/security\/limits.conf \u4e2d\u8c03\u6574\u7cfb\u7edf\u9650\u5236\uff1a<\/p>\n<pre><code>* soft nofile 65535\r\n* hard nofile 65535\r\nnginx soft nofile 65535\r\nnginx hard nofile 65535<\/code><\/pre>\n<h2><strong>\u9999\u6e2f\u7279\u5b9a\u4f18\u5316<\/strong><\/h2>\n<p>\u5728\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u65f6\uff0c\u9700\u8981\u8003\u8651\u8fd9\u4e9b\u72ec\u7279\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u4e0e\u4e2d\u56fd\u5927\u9646\u7684\u8de8\u5883\u5ef6\u8fdf<\/li>\n<li>\u56fd\u9645\u5e26\u5bbd\u5206\u914d<\/li>\n<li>\u533a\u57df\u9632\u706b\u5899\u914d\u7f6e<\/li>\n<\/ul>\n<p>\u9488\u5bf9\u8de8\u5883\u6d41\u91cf\u4f18\u5316\u60a8\u7684 NGINX \u914d\u7f6e\uff1a<\/p>\n<pre><code>location \/ {\r\n    proxy_pass http:\/\/backend;\r\n    proxy_http_version 1.1;\r\n    proxy_set_header Connection \"\";\r\n    proxy_next_upstream error timeout http_500 http_502 http_503 http_504;\r\n    proxy_next_upstream_tries 3;\r\n    proxy_next_upstream_timeout 10s;\r\n}<\/code><\/pre>\n<h2><strong>\u76d1\u63a7\u548c\u9884\u9632<\/strong><\/h2>\n<p>\u5b9e\u65bd\u6b64\u76d1\u63a7\u914d\u7f6e\uff1a<\/p>\n<pre><code>http {\r\n    log_format upstream_time '$remote_addr - $remote_user [$time_local] '\r\n                            '\"$request\" $status $body_bytes_sent '\r\n                            '\"$http_referer\" \"$http_user_agent\"'\r\n                            'rt=$request_time uct=\"$upstream_connect_time\" '\r\n                            'uht=\"$upstream_header_time\" urt=\"$upstream_response_time\"';\r\n    \r\n    access_log \/var\/log\/nginx\/access.log upstream_time;\r\n}<\/code><\/pre>\n<h2><strong>\u6545\u969c\u6392\u9664\u6e05\u5355<\/strong><\/h2>\n<p>\u8c03\u8bd5 502 \u9519\u8bef\u65f6\uff0c\u8bf7\u9075\u5faa\u8fd9\u4e2a\u7cfb\u7edf\u65b9\u6cd5\uff1a<\/p>\n<pre><code>1. \u68c0\u67e5 NGINX \u548c\u540e\u7aef\u670d\u52a1\uff1a\r\n   systemctl status nginx\r\n   systemctl status php-fpm\r\n\r\n2. \u9a8c\u8bc1\u65e5\u5fd7\uff1a\r\n   tail -f \/var\/log\/nginx\/error.log\r\n   tail -f \/var\/log\/nginx\/access.log\r\n\r\n3. \u6d4b\u8bd5\u540e\u7aef\u8fde\u901a\u6027\uff1a\r\n   curl -I http:\/\/backend_server\r\n\r\n4. \u68c0\u67e5\u5957\u63a5\u5b57\u6743\u9650\uff1a\r\n   ls -la \/var\/run\/php-fpm\/php-fpm.sock<\/code><\/pre>\n<h2><strong>\u5e38\u89c1\u95ee\u9898\u89e3\u7b54<\/strong><\/h2>\n<p>\u95ee\uff1a\u4e3a\u4ec0\u4e48\u6211\u7684 NGINX \u5728\u9ad8\u5cf0\u671f\u4f1a\u8fd4\u56de 502 \u9519\u8bef\uff1f<\/p>\n<p>\u7b54\uff1a\u901a\u5e38\u662f\u7531\u4e8e worker_connections \u9650\u5236\u6216 PHP-FPM \u8fdb\u7a0b\u8017\u5c3d\u5bfc\u81f4\u3002\u8c03\u6574\u8fd9\u4e9b\u8bbe\u7f6e\uff1a<\/p>\n<pre><code>events {\r\n    worker_connections 10240;\r\n}\r\n\r\n# php-fpm.conf\r\npm = dynamic\r\npm.max_children = 50\r\npm.start_servers = 5\r\npm.min_spare_servers = 5\r\npm.max_spare_servers = 35<\/code><\/pre>\n<h2><strong>\u6700\u7ec8\u4f18\u5316\u5efa\u8bae<\/strong><\/h2>\n<p>\u5728\u9999\u6e2f\u670d\u52a1\u5668\u73af\u5883\u4e2d\u5b9e\u65bd\u8fd9\u4e9b\u9ad8\u7ea7\u8c03\u6574\u4ee5\u83b7\u5f97\u6700\u4f73\u6027\u80fd\uff1a<\/p>\n<pre><code>http {\r\n    keepalive_timeout 65;\r\n    keepalive_requests 100;\r\n    \r\n    # FastCGI \u4f18\u5316\r\n    fastcgi_buffering on;\r\n    fastcgi_buffers 16 16k;\r\n    fastcgi_buffer_size 32k;\r\n    \r\n    # Gzip \u8bbe\u7f6e\r\n    gzip on;\r\n    gzip_comp_level 5;\r\n    gzip_types text\/plain text\/css application\/javascript;\r\n}<\/code><\/pre>\n<p>\u8bf7\u8bb0\u4f4f\u5b9a\u671f\u76d1\u63a7\u60a8\u7684 NGINX \u53cd\u5411\u4ee3\u7406\u6027\u80fd\uff0c\u5e76\u6839\u636e\u60a8\u7684\u5177\u4f53\u670d\u52a1\u5668\u9700\u6c42\u8c03\u6574\u914d\u7f6e\u3002\u8fd9\u4e9b\u89e3\u51b3\u65b9\u6848\u7279\u522b\u9002\u7528\u4e8e\u5904\u7406\u8de8\u5883\u6d41\u91cf\u548c\u9ad8\u5e76\u53d1\u573a\u666f\u7684\u9999\u6e2f\u670d\u52a1\u5668\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u8fd0\u884c\u65f6\uff0c\u9047\u5230 NGINX \u53cd\u5411\u4ee3\u7406\u8bbe\u7f6e\u4e2d\u7684 502 Bad Gateway \u9519\u8bef\u53ef\u80fd\u4f1a\u4ee4\u4eba\u70e6\u607c\u3002\u672c\u6307\u5357\u5c06\u6df1\u5165\u63a2\u8ba8\u5b9e\u7528\u89e3\u51b3\u65b9\u6848\uff0c\u5e76\u9644\u5e26\u5b9e\u9645\u793a\u4f8b\u548c\u7ecf\u8fc7\u5b9e\u6218\u68c0\u9a8c\u7684\u914d\u7f6e\u3002 \u7406\u89e3 NGINX \u4e2d\u7684 502 Bad Gateway 502 Bad Gateway \u8868\u793a\u60a8\u7684 NGINX \u670d\u52a1\u5668\u4f5c\u4e3a\u53cd\u5411\u4ee3\u7406\u65e0\u6cd5\u4ece\u4e0a\u6e38\u670d\u52a1\u5668\u83b7\u5f97\u6709\u6548\u54cd\u5e94\u3002\u5728\u9999\u6e2f\u7684\u670d\u52a1\u5668\u73af\u5883\u4e2d\uff0c\u8fd9\u901a\u5e38\u6e90\u4e8e\u7f51\u7edc\u5ef6\u8fdf\u3001\u9632\u706b\u5899\u914d\u7f6e\u6216\u8d44\u6e90\u9650\u5236\u3002 \u5e38\u89c1\u89e6\u53d1\u56e0\u7d20\u5305\u62ec\uff1a \u4e0a\u6e38\u670d\u52a1\u5668\u5b95\u673a PHP-FPM \u5957\u63a5\u5b57\u901a\u4fe1\u95ee\u9898 \u5de5\u4f5c\u8fde\u63a5\u6570\u4e0d\u8db3 \u5185\u5b58\u9650\u5236 \u7f51\u7edc\u8d85\u65f6\u8bbe\u7f6e \u5feb\u901f\u8bca\u65ad\u6b65\u9aa4 \u9996\u5148\uff0c\u68c0\u67e5\u60a8\u7684 NGINX \u670d\u52a1\u72b6\u6001\uff1a systemctl status nginx tail -f \/var\/log\/nginx\/error.log \u8ba9\u6211\u4eec\u68c0\u67e5\u60a8\u7684 NGINX \u914d\u7f6e\u4e2d\u7684\u6f5c\u5728\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5178\u578b\u7684\u53cd\u5411\u4ee3\u7406\u8bbe\u7f6e\uff0c\u5e76\u6807\u51fa\u4e86\u5e38\u89c1\u95ee\u9898\uff1a server { listen 80; server_name example.com; location \/ { proxy_pass http:\/\/backend_server; proxy_buffers 16 4k; proxy_buffer_size 2k; [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-cn\/knowledge\/how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":3,"featured_media":19649,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[80],"tags":[],"class_list":["post-19651","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u89e3\u51b3\u9999\u6e2f\u670d\u52a1\u5668\u7684 NGINX 502 Bad Gateway \u95ee\u9898\uff1f<\/title>\n<meta name=\"description\" content=\"\u638c\u63e1\u5728\u9999\u6e2f\u670d\u52a1\u5668\u4e0a\u89e3\u51b3 NGINX 502 Bad Gateway \u9519\u8bef\u7684\u6280\u5de7\u3002\u5305\u542b\u5b9e\u7528\u7684\u53cd\u5411\u4ee3\u7406\u914d\u7f6e\u548c\u4f18\u5316\u65b9\u6848\u7684\u4ee3\u7801\u793a\u4f8b\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.varidata.com\/zh-cn\/knowledge\/how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5982\u4f55\u89e3\u51b3\u9999\u6e2f\u670d\u52a1\u5668\u7684 NGINX 502 Bad Gateway \u95ee\u9898\uff1f\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.varidata.com\/zh-cn\/knowledge\/how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers\/\" \/>\n<meta property=\"og:site_name\" content=\"Varidata Limited\" \/>\n<meta property=\"article:published_time\" content=\"2024-10-26T01:11:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-10T01:15:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.varidata.com\/wp-content\/uploads\/2024\/10\/var_1026_04.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"611\" \/>\n\t<meta property=\"og:image:height\" content=\"340\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.varidata.com\/zh-cn\/knowledge\/how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.varidata.com\/zh-cn\/knowledge\/how-to-fix-nginx-502-bad-gateway-for-hong-kong-servers\/\"},\"author\":\"Varidata\",\"headline\":\"\u5982\u4f55\u89e3\u51b3\u9999\u6e2f\u670d\u52a1\u5668\u7684 NGINX 502 Bad Gateway 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