{"id":5069,"date":"2026-11-01T10:52:40","date_gmt":"2026-11-01T10:52:40","guid":{"rendered":"https:\/\/zynoo.com\/blog\/502-bad-gateway-nginx\/"},"modified":"2026-11-01T16:25:51","modified_gmt":"2026-11-01T16:25:51","slug":"502-bad-gateway-nginx","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/zh\/502-bad-gateway-nginx\/","title":{"rendered":"\u5982\u4f55\u4fee\u590d Nginx 502 \u7f51\u5173\u9519\u8bef\uff08\u5206\u6b65\u6307\u5357\uff09"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\" id=\"h-\"><strong>Nginx 502 \u7f51\u5173\u9519\u8bef<\/strong>\u901a\u5e38\u610f\u5473\u7740 Nginx \u672a\u80fd\u4ece\u4e0a\u6e38\u670d\u52a1\u5668\uff08\u5982 PHP-FPM\u3001Node.js \u6216\u5176\u4ed6\u540e\u7aef\u5e94\u7528\uff09\u6536\u5230\u6709\u6548\u54cd\u5e94\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u6700\u5e38\u89c1\u7684\u539f\u56e0\u5305\u62ec\u5e94\u7528\u670d\u52a1\u5df2\u505c\u6b62\u3001\u4e0a\u6e38\u7aef\u53e3\u6216\u5957\u63a5\u5b57\u914d\u7f6e\u9519\u8bef\uff0c\u4ee5\u53ca\u540e\u7aef\u8fdb\u7a0b\u5d29\u6e83\u6216\u610f\u5916\u5173\u95ed\u8fde\u63a5\u3002<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>\u9996\u5148\u68c0\u67e5 Nginx \u9519\u8bef\u65e5\u5fd7\u3002<\/strong>\u65e5\u5fd7\u901a\u5e38\u80fd\u660e\u786e\u6307\u51fa\u8fde\u63a5\u5931\u8d25\u7684\u539f\u56e0\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u672c\u6307\u5357\u4ecb\u7ecd\u8fd0\u884c Nginx \u7684 Linux \u670d\u52a1\u5668\u4e0a\u6392\u67e5\u95ee\u9898\u7684\u4e03\u4e2a\u5b9e\u7528\u6b65\u9aa4\u3002<\/p>\n\n<h2 id=\"h-what-causes-a-502-bad-gateway-error-in-nginx\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nginx_502_%E7%BD%91%E5%85%B3%E9%94%99%E8%AF%AF%E7%9A%84%E5%8E%9F%E5%9B%A0%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F\"><\/span>Nginx 502 \u7f51\u5173\u9519\u8bef\u7684\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Nginx \u901a\u5e38\u5145\u5f53\u53cd\u5411\u4ee3\u7406\uff0c\u5c06\u8bf7\u6c42\u8f6c\u53d1\u7ed9\u540e\u7aef\u5e94\u7528\uff0c\u518d\u5c06\u5176\u54cd\u5e94\u8fd4\u56de\u7ed9\u8bbf\u95ee\u8005\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4e0a\u6e38\u670d\u52a1\u672a\u80fd\u6b63\u786e\u54cd\u5e94\uff0cNginx \u53ef\u80fd\u8fd4\u56de HTTP \u72b6\u6001\u7801 502\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5e38\u89c1\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n\n<ul class=\"wp-block-list\">\n<li>\u540e\u7aef\u670d\u52a1\u505c\u6b62\u6216\u5d29\u6e83\u3002<\/li>\n\n\n\n<li>\u4e0a\u6e38 IP \u5730\u5740\u3001\u7aef\u53e3\u6216 Unix \u5957\u63a5\u5b57\u914d\u7f6e\u9519\u8bef\u3002<\/li>\n\n\n\n<li>PHP-FPM \u6216\u5e94\u7528\u8fdb\u7a0b\u53d1\u751f\u6545\u969c\u3002<\/li>\n\n\n\n<li>\u5957\u63a5\u5b57\u8bbf\u95ee\u6743\u9650\u5b58\u5728\u95ee\u9898\u3002<\/li>\n\n\n\n<li>\u5185\u5b58\u6216\u78c1\u76d8\u7a7a\u95f4\u4e0d\u8db3\u3002<\/li>\n\n\n\n<li>\u4e0a\u6e38\u8fde\u63a5\u65e0\u6548\u6216\u8fc7\u65e9\u5173\u95ed\u3002<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u68c0\u67e5\u6b65\u9aa4\u4ee5\u60a8\u62e5\u6709 SSH \u8bbf\u95ee\u6743\u9650\u548c Linux \u670d\u52a1\u5668\u7ba1\u7406\u6743\u9650\u4e3a\u524d\u63d0\u3002<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><strong>\u5982\u679c\u60a8\u4e0d\u719f\u6089\u5982\u4f55\u8bbf\u95ee\u8fdc\u7a0b\u670d\u52a1\u5668\uff0c<\/strong>\u8bf7\u5148\u9605\u8bfb\u6211\u4eec\u7684<a href=\"https:\/\/zynoo.com\/blog\/zh\/ssh-commands\/\">SSH \u547d\u4ee4\u5165\u95e8\u6307\u5357<\/a>\uff0c\u518d\u7ee7\u7eed\u64cd\u4f5c\u3002<\/p>\n<\/div>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/what-cause-502-Bad-Gateway-Nginx-1024x576.webp\" alt=\"Nginx 502 &#x7F51;&#x5173;&#x9519;&#x8BEF;&#x7684;&#x539F;&#x56E0;\" class=\"wp-image-5037\" srcset=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/what-cause-502-Bad-Gateway-Nginx-1024x576.webp 1024w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/what-cause-502-Bad-Gateway-Nginx-300x169.webp 300w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/what-cause-502-Bad-Gateway-Nginx-768x432.webp 768w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/what-cause-502-Bad-Gateway-Nginx-1536x864.webp 1536w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/what-cause-502-Bad-Gateway-Nginx.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 id=\"h-1-check-the-nginx-error-logs\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_%E6%A3%80%E6%9F%A5_Nginx_%E9%94%99%E8%AF%AF%E6%97%A5%E5%BF%97\"><\/span>1. \u68c0\u67e5 Nginx \u9519\u8bef\u65e5\u5fd7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u67e5\u770b Nginx \u9519\u8bef\u65e5\u5fd7\u901a\u5e38\u662f\u627e\u51fa 502 \u9519\u8bef\u539f\u56e0\u6700\u5feb\u7684\u65b9\u6cd5\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7 SSH \u8fde\u63a5\u5230\u670d\u52a1\u5668\u5e76\u8fd0\u884c\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo tail -n 50 \/var\/log\/nginx\/error.log<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4f1a\u663e\u793a\u6700\u65b0\u7684 50 \u6761\u65e5\u5fd7\u8bb0\u5f55\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u8981\u5b9e\u65f6\u6392\u67e5\u95ee\u9898\uff0c\u8bf7\u4f7f\u7528\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo tail -f \/var\/log\/nginx\/error.log<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u91cd\u65b0\u52a0\u8f7d\u51fa\u73b0\u95ee\u9898\u7684\u7f51\u9875\uff0c\u5e76\u7559\u610f\u65b0\u51fa\u73b0\u7684\u65e5\u5fd7\u6d88\u606f\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>\u65e5\u5fd7\u6d88\u606f<\/th><th>\u53ef\u80fd\u7684\u95ee\u9898<\/th><\/tr><tr><td><code>connect() failed (111: Connection refused)<\/code><\/td><td>\u540e\u7aef\u672a\u63a5\u53d7\u8fde\u63a5<\/td><\/tr><tr><td><code>No such file or directory<\/code><\/td><td>\u914d\u7f6e\u7684\u4e0a\u6e38\u5957\u63a5\u5b57\u4e0d\u5b58\u5728<\/td><\/tr><tr><td><code>Permission denied<\/code><\/td><td>Nginx \u65e0\u6cd5\u8bbf\u95ee\u5957\u63a5\u5b57\u6216\u8d44\u6e90<\/td><\/tr><tr><td><code>upstream prematurely closed connection<\/code><\/td><td>\u540e\u7aef\u610f\u5916\u5173\u95ed\u4e86\u8fde\u63a5<\/td><\/tr><tr><td><code>upstream sent invalid header<\/code><\/td><td>\u540e\u7aef\u8fd4\u56de\u7684\u54cd\u5e94\u6807\u5934\u683c\u5f0f\u4e0d\u6b63\u786e<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u60a8\u7684\u6258\u7ba1\u73af\u5883\u53ef\u80fd\u4f7f\u7528\u4e0d\u540c\u7684\u65e5\u5fd7\u8def\u5f84\u3002<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>\u5728\u786e\u5b9a\u53ef\u80fd\u7684\u539f\u56e0\u4e4b\u524d\uff0c\u4e0d\u8981\u66f4\u6539 Nginx \u8bbe\u7f6e\u3002<\/strong><\/p>\n\n<h2 id=\"h-2-check-whether-the-backend-service-is-running\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_%E6%A3%80%E6%9F%A5%E5%90%8E%E7%AB%AF%E6%9C%8D%E5%8A%A1%E6%98%AF%E5%90%A6%E6%AD%A3%E5%9C%A8%E8%BF%90%E8%A1%8C\"><\/span>2. \u68c0\u67e5\u540e\u7aef\u670d\u52a1\u662f\u5426\u6b63\u5728\u8fd0\u884c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">502 \u9519\u8bef\u901a\u5e38\u662f\u56e0\u4e3a Nginx \u540e\u9762\u7684\u5e94\u7528\u5df2\u505c\u6b62\u8fd0\u884c\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u7531 systemd \u7ba1\u7406\u7684\u5e94\u7528\u670d\u52a1\uff0c\u8fd0\u884c\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo systemctl status myapp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5c06 <code>myapp<\/code> \u66ff\u6362\u4e3a\u5b9e\u9645\u7684\u670d\u52a1\u540d\u79f0\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u4f7f\u7528 PHP-FPM \u7684 PHP \u5e94\u7528\uff0c\u670d\u52a1\u540d\u79f0\u53ef\u80fd\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo systemctl status php8.3-fpm<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5df2\u5b89\u88c5\u7684 PHP \u7248\u672c\u548c\u670d\u52a1\u540d\u79f0\u53ef\u80fd\u6709\u6240\u4e0d\u540c\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u670d\u52a1\u8fd0\u884c\u5931\u8d25\uff0c\u8bf7\u67e5\u770b\u5176\u65e5\u5fd7\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo journalctl -u myapp -n 50<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u68c0\u67e5\u662f\u5426\u5b58\u5728\u5d29\u6e83\u3001\u4f9d\u8d56\u9879\u7f3a\u5931\u3001\u914d\u7f6e\u9519\u8bef\u6216\u4e0e\u5185\u5b58\u6709\u5173\u7684\u6545\u969c\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u53ea\u6709\u5728\u786e\u5b9a\u5e76\u89e3\u51b3\u6839\u672c\u95ee\u9898\u540e\uff0c\u624d\u91cd\u542f\u670d\u52a1\u3002<\/p>\n\n<h2 id=\"h-3-verify-the-upstream-port-or-socket\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_%E6%A0%B8%E5%AF%B9%E4%B8%8A%E6%B8%B8%E7%AB%AF%E5%8F%A3%E6%88%96%E5%A5%97%E6%8E%A5%E5%AD%97\"><\/span>3. \u6838\u5bf9\u4e0a\u6e38\u7aef\u53e3\u6216\u5957\u63a5\u5b57<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Nginx \u5fc5\u987b\u5c06\u8bf7\u6c42\u8f6c\u53d1\u5230\u6b63\u786e\u7684\u540e\u7aef\u5730\u5740\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff0c\u53cd\u5411\u4ee3\u7406\u914d\u7f6e\u4e2d\u53ef\u80fd\u5305\u542b\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>location \/ {\n    proxy_pass http:\/\/127.0.0.1:3000;\n}<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8868\u793a Nginx \u4f1a\u5c06\u8bf7\u6c42\u8f6c\u53d1\u7ed9\u76d1\u542c 3000 \u7aef\u53e3\u7684 HTTP \u5e94\u7528\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u68c0\u67e5\u662f\u5426\u6709\u8fdb\u7a0b\u6b63\u5728\u76d1\u542c\u8be5\u7aef\u53e3\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ss -ltnp | grep ':3000'<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u60a8\u4e5f\u53ef\u4ee5\u76f4\u63a5\u6d4b\u8bd5 HTTP \u540e\u7aef\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>curl -i http:\/\/127.0.0.1:3000\/<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u540e\u7aef\u4e0d\u53ef\u7528\uff0c\u5e94\u5148\u68c0\u67e5\u5176\u670d\u52a1\u914d\u7f6e\uff0c\u518d\u8003\u8651\u66f4\u6539 Nginx \u914d\u7f6e\u3002<\/p>\n\n<h3 id=\"h-check-php-fpm-sockets\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A3%80%E6%9F%A5_PHP-FPM_%E5%A5%97%E6%8E%A5%E5%AD%97\"><\/span>\u68c0\u67e5 PHP-FPM \u5957\u63a5\u5b57<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">PHP-FPM \u901a\u5e38\u4f7f\u7528 Unix \u5957\u63a5\u5b57\u6216 TCP \u7aef\u53e3\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">Nginx \u914d\u7f6e\u4e2d\u53ef\u80fd\u5305\u542b\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>fastcgi_pass unix:\/run\/php\/php8.3-fpm.sock;<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u68c0\u67e5\u914d\u7f6e\u7684\u5957\u63a5\u5b57\u662f\u5426\u5b58\u5728\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>ls -l \/run\/php\/<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5957\u63a5\u5b57\u8def\u5f84\u5fc5\u987b\u4e0e PHP-FPM \u8fdb\u7a0b\u6c60\u7684 <code>listen<\/code> \u8bbe\u7f6e\u4e00\u81f4\uff0c\u800c\u4e14 Nginx \u5fc5\u987b\u5177\u6709\u8fde\u63a5\u6743\u9650\u3002<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>\u91cd\u8981\u63d0\u793a\uff1a<\/strong><code>proxy_pass<\/code> \u7528\u4e8e HTTP \u4e0a\u6e38\u670d\u52a1\uff0c\u800c <code>fastcgi_pass<\/code> \u7528\u4e8e PHP-FPM \u7b49 <a href=\"https:\/\/en.wikipedia.org\/wiki\/FastCGI\">FastCGI<\/a> \u670d\u52a1\u3002\u4e24\u8005\u4e0d\u80fd\u4e92\u6362\u3002<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><strong>\u5982\u679c\u60a8\u662f\u9996\u6b21\u914d\u7f6e Nginx\uff0c\u8bf7\u786e\u4fdd proxy_pass \u6307\u5411\u6b63\u786e\u7684\u540e\u7aef\u5730\u5740\u3002<\/strong>\u6211\u4eec\u7684<a href=\"https:\/\/zynoo.com\/blog\/zh\/nginx-reverse-proxy-ubuntu\/\">Ubuntu \u4e0a\u7684 Nginx \u53cd\u5411\u4ee3\u7406\u6559\u7a0b<\/a>\u4ecb\u7ecd\u4e86\u5982\u4f55\u8bbe\u7f6e\u8bf7\u6c42\u8f6c\u53d1\u3001\u6d4b\u8bd5\u914d\u7f6e\u5e76\u542f\u7528 HTTPS\u3002<\/p>\n<\/div>\n\n<h2 id=\"h-4-check-server-memory-and-disk-space\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_%E6%A3%80%E6%9F%A5%E6%9C%8D%E5%8A%A1%E5%99%A8%E5%86%85%E5%AD%98%E5%92%8C%E7%A3%81%E7%9B%98%E7%A9%BA%E9%97%B4\"><\/span>4. \u68c0\u67e5\u670d\u52a1\u5668\u5185\u5b58\u548c\u78c1\u76d8\u7a7a\u95f4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u5f53\u670d\u52a1\u5668\u8d44\u6e90\u8017\u5c3d\u65f6\uff0c\u540e\u7aef\u5e94\u7528\u53ef\u80fd\u5d29\u6e83\u6216\u505c\u6b62\u54cd\u5e94\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u68c0\u67e5\u5185\u5b58\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u68c0\u67e5\u78c1\u76d8\u7a7a\u95f4\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>df -h<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u68c0\u67e5\u6b63\u5728\u8fd0\u884c\u7684\u8fdb\u7a0b\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>top<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5e94\u7528\u56e0\u5185\u5b58\u538b\u529b\u800c\u88ab\u7ec8\u6b62\uff0c\u60a8\u53ef\u80fd\u4f1a\u5728\u7cfb\u7edf\u65e5\u5fd7\u4e2d\u627e\u5230\u76f8\u5173\u6d88\u606f\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo journalctl -k --since \"1 hour ago\"<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u67e5\u627e\u5185\u5b58\u4e0d\u8db3\u4e8b\u4ef6\u6216\u8fdb\u7a0b\u7ec8\u6b62\u6d88\u606f\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u78c1\u76d8\u7a7a\u95f4\u5df2\u8017\u5c3d\uff0c\u8bf7\u5148\u67e5\u660e\u7a7a\u95f4\u88ab\u54ea\u4e9b\u5185\u5bb9\u5360\u7528\uff0c\u518d\u5220\u9664\u6587\u4ef6\u3002<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><strong>\u5982\u9700\u4e86\u89e3\u5176\u4ed6\u76d1\u63a7\u547d\u4ee4\uff0c<\/strong>\u8bf7\u53c2\u9605\u6211\u4eec\u7684<a href=\"https:\/\/zynoo.com\/blog\/zh\/linux-commands-for-server-management\/\">\u670d\u52a1\u5668\u7ba1\u7406\u5fc5\u5907 Linux \u547d\u4ee4<\/a>\u3002<\/p>\n<\/div>\n\n<h2 id=\"h-5-check-socket-permissions-and-application-logs\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_%E6%A3%80%E6%9F%A5%E5%A5%97%E6%8E%A5%E5%AD%97%E6%9D%83%E9%99%90%E5%92%8C%E5%BA%94%E7%94%A8%E6%97%A5%E5%BF%97\"><\/span>5. \u68c0\u67e5\u5957\u63a5\u5b57\u6743\u9650\u548c\u5e94\u7528\u65e5\u5fd7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u6709\u65f6\u540e\u7aef\u867d\u7136\u6b63\u5728\u8fd0\u884c\uff0cNginx \u5374\u65e0\u6cd5\u4e0e\u4e4b\u901a\u4fe1\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e Unix \u5957\u63a5\u5b57\uff0c\u8bf7\u68c0\u67e5\u5176\u6240\u6709\u8005\u548c\u6743\u9650\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>ls -l \/run\/php\/<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u65e5\u5fd7\u62a5\u544a\u6743\u9650\u9519\u8bef\uff0c\u8fd8\u5e94\u68c0\u67e5\u901a\u5f80\u5957\u63a5\u5b57\u7684\u5404\u7ea7\u76ee\u5f55\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u6b63\u786e\u7684\u6743\u9650\u53d6\u51b3\u4e8e Nginx \u5de5\u4f5c\u8fdb\u7a0b\u7528\u6237\u548c\u540e\u7aef\u670d\u52a1\u7684\u914d\u7f6e\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u907f\u514d\u8bbe\u7f6e <code>chmod 777<\/code> \u8fd9\u6837\u7684\u5bbd\u6cdb\u6743\u9650\u3002\u5e94\u8c03\u6574\u76f8\u5173\u670d\u52a1\u6216\u8fdb\u7a0b\u6c60\u7684\u914d\u7f6e\uff0c\u8ba9\u83b7\u5f97\u6388\u6743\u7684\u8fdb\u7a0b\u80fd\u591f\u8bbf\u95ee\u5957\u63a5\u5b57\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u9519\u8bef\u65e5\u5fd7\u663e\u793a\u4e0a\u6e38\u8fc7\u65e9\u5173\u95ed\u8fde\u63a5\uff0c\u8bf7\u68c0\u67e5\u540e\u7aef\u5e94\u7528\u7684\u65e5\u5fd7\uff0c\u67e5\u627e\u5d29\u6e83\u3001\u5f02\u5e38\u6216\u8bf7\u6c42\u5931\u8d25\u7684\u8bb0\u5f55\u3002<\/p>\n\n<h2 id=\"h-6-test-your-nginx-configuration\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_%E6%B5%8B%E8%AF%95_Nginx_%E9%85%8D%E7%BD%AE\"><\/span>6. \u6d4b\u8bd5 Nginx \u914d\u7f6e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u4ee3\u7406\u8bbe\u7f6e\u9519\u8bef\u6216\u914d\u7f6e\u53d8\u66f4\u4e5f\u53ef\u80fd\u4e2d\u65ad\u4e0e\u4e0a\u6e38\u670d\u52a1\u7684\u901a\u4fe1\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5e94\u7528\u66f4\u6539\u524d\uff0c\u8bf7\u9a8c\u8bc1 Nginx \u914d\u7f6e\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo nginx -t<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6d4b\u8bd5\u901a\u8fc7\uff0c\u8bf7\u91cd\u65b0\u52a0\u8f7d Nginx\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo systemctl reload nginx<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u91cd\u65b0\u52a0\u8f7d\u53ef\u4ee5\u5e94\u7528\u6709\u6548\u7684\u914d\u7f6e\u66f4\u6539\uff0c\u800c\u4e0d\u5fc5\u91cd\u542f\u670d\u52a1\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6d4b\u8bd5\u5931\u8d25\uff0c\u8bf7\u5148\u4fee\u6b63\u62a5\u544a\u7684\u914d\u7f6e\u9519\u8bef\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u4e0d\u8981\u76f2\u76ee\u589e\u52a0\u4ee3\u7406\u8d85\u65f6\u65f6\u95f4\u6216\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e9b\u8c03\u6574\u65e0\u6cd5\u89e3\u51b3\u540e\u7aef\u670d\u52a1\u505c\u6b62\u3001\u5957\u63a5\u5b57\u914d\u7f6e\u9519\u8bef\u6216\u8fde\u63a5\u88ab\u62d2\u7edd\u7684\u95ee\u9898\u3002<\/p>\n\n<h2 id=\"h-7-confirm-that-the-502-error-is-fixed\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_%E7%A1%AE%E8%AE%A4_502_%E9%94%99%E8%AF%AF%E5%B7%B2%E4%BF%AE%E5%A4%8D\"><\/span>7. \u786e\u8ba4 502 \u9519\u8bef\u5df2\u4fee\u590d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u89e3\u51b3\u6839\u672c\u95ee\u9898\u540e\uff0c\u6d4b\u8bd5\u53d7\u5f71\u54cd\u7684 URL\uff1a<\/p>\n\n<pre class=\"wp-block-code\"><code>curl -I https:\/\/example.com<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u5c06 <code>example.com<\/code> \u66ff\u6362\u4e3a\u60a8\u7684\u5b9e\u9645\u57df\u540d\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6c42\u6210\u529f\u65f6\u901a\u5e38\u4f1a\u8fd4\u56de <code>200 OK<\/code> \u7b49\u9002\u5f53\u7684 HTTP \u72b6\u6001\uff0c\u4f46\u91cd\u5b9a\u5411\u548c\u5176\u4ed6\u6709\u6548\u54cd\u5e94\u53ef\u80fd\u8fd4\u56de\u4e0d\u540c\u7684\u72b6\u6001\u7801\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6\u5728\u6d4f\u89c8\u5668\u4e2d\u6253\u5f00\u7f51\u7ad9\uff0c\u5e76\u518d\u6b21\u67e5\u770b Nginx \u9519\u8bef\u65e5\u5fd7\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u9519\u8bef\u5728\u9ad8\u8d1f\u8f7d\u4e0b\u518d\u6b21\u51fa\u73b0\uff0c\u8bf7\u5728\u590d\u73b0\u95ee\u9898\u7684\u540c\u65f6\u76d1\u63a7\u540e\u7aef\u670d\u52a1\u548c\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5\u3002<\/p>\n\n<h2 id=\"h-how-to-prevent-nginx-502-errors\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%A6%82%E4%BD%95%E9%A2%84%E9%98%B2_Nginx_502_%E9%94%99%E8%AF%AF\"><\/span>\u5982\u4f55\u9884\u9632 Nginx 502 \u9519\u8bef<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u5e76\u975e\u6240\u6709\u540e\u7aef\u6545\u969c\u90fd\u80fd\u9884\u9632\uff0c\u4f46\u826f\u597d\u7684\u670d\u52a1\u5668\u7ba1\u7406\u53ef\u4ee5\u51cf\u5c11\u672c\u53ef\u907f\u514d\u7684\u670d\u52a1\u4e2d\u65ad\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li>\u76d1\u63a7 Nginx \u548c\u540e\u7aef\u670d\u52a1\u7684\u8fd0\u884c\u72b6\u6001\u3002<\/li>\n\n\n\n<li>\u90e8\u7f72\u540e\u67e5\u770b\u5e94\u7528\u65e5\u5fd7\u3002<\/li>\n\n\n\n<li>\u914d\u7f6e\u9002\u5f53\u7684\u670d\u52a1\u6062\u590d\u7b56\u7565\u3002<\/li>\n\n\n\n<li>\u76d1\u63a7\u5185\u5b58\u3001\u5b58\u50a8\u7a7a\u95f4\u548c\u8fde\u63a5\u7684\u4f7f\u7528\u60c5\u51b5\u3002<\/li>\n\n\n\n<li>\u5e94\u7528\u914d\u7f6e\u66f4\u6539\u524d\u5148\u8fdb\u884c\u9a8c\u8bc1\u3002<\/li>\n\n\n\n<li>\u5728\u901a\u8fc7 Nginx \u8f6c\u53d1\u6d41\u91cf\u4e4b\u524d\uff0c\u5148\u76f4\u63a5\u6d4b\u8bd5\u5e94\u7528\u3002<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5e94\u7528\u9700\u8981\u66f4\u591a\u8d44\u6e90\uff0c\u8bf7\u5148\u6d4b\u91cf\u5b9e\u9645\u4f7f\u7528\u91cf\uff0c\u518d\u51b3\u5b9a\u662f\u5426\u5347\u7ea7\u670d\u52a1\u5668\u914d\u7f6e\u3002<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\">502 \u9519\u8bef\u8868\u793a\u4e0a\u6e38\u670d\u52a1\u5668\u8fd4\u56de\u4e86\u65e0\u6548\u54cd\u5e94\uff0c\u800c<strong>504 \u9519\u8bef<\/strong>\u5219\u8868\u793a\u4e0a\u6e38\u670d\u52a1\u5668\u54cd\u5e94\u65f6\u95f4\u8fc7\u957f\u3002\u5982\u679c\u60a8\u9047\u5230\u7684\u662f\u540e\u8005\uff0c\u8bf7\u53c2\u9605\u6211\u4eec\u7684<a href=\"https:\/\/zynoo.com\/blog\/zh\/504-gateway-timeout\/\">504 \u7f51\u5173\u8d85\u65f6\u9519\u8bef\u4fee\u590d\u6307\u5357<\/a>\uff0c\u6392\u67e5\u5e94\u7528\u54cd\u5e94\u7f13\u6162\u3001\u670d\u52a1\u5668\u8d44\u6e90\u548c\u4ee3\u7406\u8d85\u65f6\u8bbe\u7f6e\u7b49\u95ee\u9898\u3002<\/p>\n<\/div>\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98\"><\/span>\u5e38\u89c1\u95ee\u9898<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1793529208055\"><strong class=\"schema-faq-question\">Nginx \u4e2d\u7684 502 \u7f51\u5173\u9519\u8bef\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/strong> <p class=\"schema-faq-answer\">\u8fd9\u8868\u793a\u5145\u5f53\u7f51\u5173\u6216\u4ee3\u7406\u7684 Nginx \u6536\u5230\u4e86\u4e0a\u6e38\u670d\u52a1\u5668\u7684\u65e0\u6548\u54cd\u5e94\u3002\u539f\u56e0\u901a\u5e38\u662f\u540e\u7aef\u670d\u52a1\u5df2\u505c\u6b62\uff0c\u6216\u4e0a\u6e38\u8fde\u63a5\u51fa\u73b0\u95ee\u9898\u3002<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793529240063\"><strong class=\"schema-faq-question\">\u91cd\u542f Nginx \u80fd\u4fee\u590d 502 \u9519\u8bef\u5417\uff1f<\/strong> <p class=\"schema-faq-answer\">\u4e0d\u4e00\u5b9a\u3002\u91cd\u542f\u6216\u91cd\u65b0\u52a0\u8f7d Nginx \u65e0\u6cd5\u89e3\u51b3\u5e94\u7528\u4e0d\u53ef\u7528\u3001\u540e\u7aef\u7aef\u53e3\u914d\u7f6e\u9519\u8bef\u6216 PHP-FPM \u5957\u63a5\u5b57\u7f3a\u5931\u7684\u95ee\u9898\u3002<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793529252450\"><strong class=\"schema-faq-question\">HTTP 502 \u548c HTTP 504 \u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/strong> <p class=\"schema-faq-answer\">502 \u9519\u8bef\u8868\u793a\u4e0a\u6e38\u670d\u52a1\u5668\u8fd4\u56de\u4e86\u65e0\u6548\u54cd\u5e94\uff0c\u800c 504 \u9519\u8bef\u8868\u793a\u7f51\u5173\u672a\u80fd\u5728\u8d85\u65f6\u65f6\u95f4\u5185\u6536\u5230\u4e0a\u6e38\u670d\u52a1\u5668\u7684\u54cd\u5e94\u3002<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793529289265\"><strong class=\"schema-faq-question\">\u5185\u5b58\u4e0d\u8db3\u4f1a\u5bfc\u81f4 502 \u7f51\u5173\u9519\u8bef\u5417\uff1f<\/strong> <p class=\"schema-faq-answer\">\u4f1a\u3002\u5185\u5b58\u8017\u5c3d\u53ef\u80fd\u5bfc\u81f4\u540e\u7aef\u8fdb\u7a0b\u5d29\u6e83\u6216\u88ab\u7ec8\u6b62\uff0c\u4f7f Nginx \u65e0\u6cd5\u4e0e\u5176\u901a\u4fe1\u3002<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793529308749\"><strong class=\"schema-faq-question\">502 \u9519\u8bef\u603b\u662f\u7531 Nginx \u5f15\u8d77\u7684\u5417\uff1f<\/strong> <p class=\"schema-faq-answer\">\u4e0d\u662f\u3002\u5176\u4ed6\u7f51\u5173\u3001\u4ee3\u7406\u3001CDN \u548c\u8d1f\u8f7d\u5747\u8861\u5668\u4e5f\u53ef\u80fd\u8fd4\u56de HTTP 502 \u9519\u8bef\u3002<\/p> <\/div> <\/div>\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%80%BB%E7%BB%93\"><\/span>\u603b\u7ed3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">\u8981\u4fee\u590d <strong>Nginx 502 \u7f51\u5173\u9519\u8bef<\/strong>\uff0c\u9996\u5148\u9700\u8981\u67e5\u660e\u4e0a\u6e38\u5e94\u7528\u672a\u80fd\u6b63\u786e\u54cd\u5e94\u7684\u539f\u56e0\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u5148\u68c0\u67e5 Nginx \u9519\u8bef\u65e5\u5fd7\uff0c\u786e\u8ba4\u540e\u7aef\u670d\u52a1\u6b63\u5728\u8fd0\u884c\uff0c\u5e76\u6838\u5bf9\u914d\u7f6e\u7684\u7aef\u53e3\u6216\u5957\u63a5\u5b57\u3002\u7136\u540e\u6392\u67e5\u8d44\u6e90\u9650\u5236\u3001\u6743\u9650\u548c\u5e94\u7528\u6545\u969c\u3002<\/p>\n\n<p 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[&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":5070,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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