search
HomeOperation and MaintenanceNginxHow to solve nginx 503 Service Temporarily Unavailable error

Recently, the 503 service temporarily unavailable error often appears after the website is refreshed. Sometimes it is possible. I think of the recent restriction on the number of single IP visits in nginx.conf (limit_req_zone $binary_remote_addr zone=allips:20m rate=20r/s; ) After enlarging this number and refreshing, the problem is solved. (I also changed this to a larger limit_req zone=allips burst=50 nodelay; ) In order to confirm the problem, I repeatedly changed the number and tested it and found that the problem is indeed here. There is a problem if this number is set too small. I found through fiddler that the web page needs to be refreshed because the js, css, and images referenced on the page are all counted as one connection. Therefore, this limit may be exceeded with a single page refresh. If this limit is exceeded, a 503 service temporarily unavailable message will be displayed.

Attach nginx.conf

#user nobody;
worker_processes 1;
#worker_rlimit_nofile 100000; 
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
 
#pid    logs/nginx.pid;
 
events {
  worker_connections 1024;
}
 
http {
  include    mime.types;
  default_type application/octet-stream;
 
##cache##
 proxy_connect_timeout 5;
 proxy_read_timeout 60;
 proxy_send_timeout 5;
 proxy_buffer_size 16k;
 proxy_buffers 4 64k;
 proxy_busy_buffers_size 128k;
 proxy_temp_file_write_size 128k;
 proxy_temp_path /home/temp_dir;
 proxy_cache_path /usr/local/nginx/cache levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;
 ##end##
#limit per ip per second access times 10 
limit_req_zone $binary_remote_addr zone=allips:20m rate=20r/s;
 
  #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 logs/access.log main;
 
  sendfile    on;
  #tcp_nopush   on;
 
  #keepalive_timeout 0;
  keepalive_timeout 65;
 
  #gzip on;
upstream myweb80{
  ip_hash;
  server 192.168.3.105:80;
  server 192.168.3.103:80;
}
 
upstream myweb8080{
  ip_hash;
  server 192.168.3.222:10080;
  #server 192.168.3.103:8080;
 } 
upstream myweb10086{
  ip_hash;
  server 192.168.3.102:10086;
  server 192.168.3.108:10086;
 } 
upstream myweb443{
  ip_hash;
  server 192.168.3.105:443;
  server 192.168.3.103:443;
 } 
 
  # another virtual host using mix of ip-, name-, and port-based configuration
  #
  server {
    listen    80;
    allow  218.17.158.2;
allow 127.0.0.0/24;
allow 192.168.0.0/16;
allow 58.251.130.1;
allow 183.239.167.3;
allow 61.145.164.1;
deny  all;
server_name myweb.com;
    location / {
        proxy_pass http://myweb80;
proxy_set_header x-real-ip $remote_addr;
limit_req zone=allips burst=50 nodelay;  
    }
  }
 
  server {
    listen    8080;
allow  218.17.158.2;
allow 127.0.0.0/24;
allow 192.168.0.0/16;
allow 58.251.130.1;
allow 183.239.167.3;
allow 61.145.164.1;
deny  all;
    location / {
        proxy_pass http://myweb8080;
proxy_set_header x-real-ip $remote_addr;
limit_req zone=allips burst=50 nodelay;  
    }
  }
 
# https server
  #
  server {
    listen    10086 ssl;
    server_name localhost;
allow  218.17.158.2;
allow 127.0.0.0/24;
allow 192.168.0.0/16;
allow 58.251.130.1;
allow 183.239.167.3;
allow 61.145.164.1;
#deny  all;
    ssl_certificate   ssl/1_www.myweb.com_bundle.crt;
    ssl_certificate_key ssl/2_www.myweb.com.key;
 
  #  ssl_session_cache  shared:ssl:1m;
  #  ssl_session_timeout 5m;
 
  #  ssl_ciphers high:!anull:!md5;
  #  ssl_prefer_server_ciphers on;
 
    location / { 
   proxy_pass https:// myweb10086; 
   #roft html; 
   #index index.html index.htm; 
    } 
  }
 
  服务器{ 
    listen 443 ssl; 
    server_name localhost;
 
    ssl_certificate ssl / 1_www.myweb.com_bundle.crt; 
    ssl_certificate_key ssl / 2_www.myweb.com.key;
 
  #ssl_session_cache共享:ssl:1m; 
  #ssl_session_timeout 5m;
 
  #ssl_ciphers high:!anull:!md5; 
  #ssl_prefer_server_ciphers on;
 
    location / { 
   proxy_pass https:// myweb443; 
   #roft html; 
   #roft html; 
   #index index.html index.htm; 
    } 
  } 
}

The above is the detailed content of How to solve nginx 503 Service Temporarily Unavailable error. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:亿速云. If there is any infringement, please contact admin@php.cn delete
内存飙升!记一次nginx拦截爬虫内存飙升!记一次nginx拦截爬虫Mar 30, 2023 pm 04:35 PM

本篇文章给大家带来了关于nginx的相关知识,其中主要介绍了nginx拦截爬虫相关的,感兴趣的朋友下面一起来看一下吧,希望对大家有帮助。

nginx限流模块源码分析nginx限流模块源码分析May 11, 2023 pm 06:16 PM

高并发系统有三把利器:缓存、降级和限流;限流的目的是通过对并发访问/请求进行限速来保护系统,一旦达到限制速率则可以拒绝服务(定向到错误页)、排队等待(秒杀)、降级(返回兜底数据或默认数据);高并发系统常见的限流有:限制总并发数(数据库连接池)、限制瞬时并发数(如nginx的limit_conn模块,用来限制瞬时并发连接数)、限制时间窗口内的平均速率(nginx的limit_req模块,用来限制每秒的平均速率);另外还可以根据网络连接数、网络流量、cpu或内存负载等来限流。1.限流算法最简单粗暴的

nginx+rsync+inotify怎么配置实现负载均衡nginx+rsync+inotify怎么配置实现负载均衡May 11, 2023 pm 03:37 PM

实验环境前端nginx:ip192.168.6.242,对后端的wordpress网站做反向代理实现复杂均衡后端nginx:ip192.168.6.36,192.168.6.205都部署wordpress,并使用相同的数据库1、在后端的两个wordpress上配置rsync+inotify,两服务器都开启rsync服务,并且通过inotify分别向对方同步数据下面配置192.168.6.205这台服务器vim/etc/rsyncd.confuid=nginxgid=nginxport=873ho

nginx php403错误怎么解决nginx php403错误怎么解决Nov 23, 2022 am 09:59 AM

nginx php403错误的解决办法:1、修改文件权限或开启selinux;2、修改php-fpm.conf,加入需要的文件扩展名;3、修改php.ini内容为“cgi.fix_pathinfo = 0”;4、重启php-fpm即可。

如何解决跨域?常见解决方案浅析如何解决跨域?常见解决方案浅析Apr 25, 2023 pm 07:57 PM

跨域是开发中经常会遇到的一个场景,也是面试中经常会讨论的一个问题。掌握常见的跨域解决方案及其背后的原理,不仅可以提高我们的开发效率,还能在面试中表现的更加

nginx部署react刷新404怎么办nginx部署react刷新404怎么办Jan 03, 2023 pm 01:41 PM

nginx部署react刷新404的解决办法:1、修改Nginx配置为“server {listen 80;server_name https://www.xxx.com;location / {root xxx;index index.html index.htm;...}”;2、刷新路由,按当前路径去nginx加载页面即可。

nginx怎么禁止访问phpnginx怎么禁止访问phpNov 22, 2022 am 09:52 AM

nginx禁止访问php的方法:1、配置nginx,禁止解析指定目录下的指定程序;2、将“location ~^/images/.*\.(php|php5|sh|pl|py)${deny all...}”语句放置在server标签内即可。

Linux系统下如何为Nginx安装多版本PHPLinux系统下如何为Nginx安装多版本PHPMay 11, 2023 pm 07:34 PM

linux版本:64位centos6.4nginx版本:nginx1.8.0php版本:php5.5.28&php5.4.44注意假如php5.5是主版本已经安装在/usr/local/php目录下,那么再安装其他版本的php再指定不同安装目录即可。安装php#wgethttp://cn2.php.net/get/php-5.4.44.tar.gz/from/this/mirror#tarzxvfphp-5.4.44.tar.gz#cdphp-5.4.44#./configure--pr

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

Hot Tools

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use