解决nginx 503 Service Temporarily Unavailable方法示例

  #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;       }     }   }