nginx负载均衡

Jun 02 2020

环境：ubuntu
使用框架：flask+nginx

nginx配置路径：
/etc/nginx/sites-enabled/server

主服务器配置

设置backupserver

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upstream backupserver {
         server 主服务器ip:443;
         server 副服务器ip:443;
         keepalive 60;
}

默认https配置

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server {
   listen 443;
   server_name _;
   ssl on;
   ssl_certificate [pem文件路径];
   ssl_certificate_key [key文件路径];
   ssl_session_timeout  5m;
   ssl_protocols  SSLv2 SSLv3 TLSv1 TLSv1.1 TLSv1.2;
   ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
   ssl_prefer_server_ciphers   on;

   location / {
        include uwsgi_params;
        uwsgi_pass unix:[flask sock 文件路径];
   }

}

http配置(http不设置负载均衡)

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server {
  listen 80;
  server_name _;

  location / {
        include uwsgi_params;
        uwsgi_pass unix:[flask sock 文件路径];
   }
}

负载均衡配置

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server {
    listen 443;
    # listen [::]:443 default_server;
    server_name 主服务器域名;
    ssl on;
    ssl_certificate [pem文件路径];
    ssl_certificate_key [key文件路径];
    ssl_session_timeout  5m;
    ssl_protocols  SSLv2 SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    ssl_prefer_server_ciphers   on;
    client_max_body_size 5M;
    location / {
        proxy_pass https://backupserver;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_connect_timeout 75;
        proxy_read_timeout 300;
        proxy_send_timeout 300;
        proxy_buffer_size 64k;
        proxy_buffers   4 64k;
        proxy_busy_buffers_size 128k;
        proxy_temp_file_write_size 128k;
    }
}

副服务器配置

http配置

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server {
    listen 80;
    server_name 副服务器域名;
    return 301 https://副服务器域名$request_uri;
}

https配置

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server {
    listen 443;
    server_name _;
    ssl on;
    ssl_certificate [pem文件路径];
    ssl_certificate_key [key文件路径];
    ssl_session_timeout  5m;
    ssl_protocols  SSLv2 SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    ssl_prefer_server_ciphers   on;
    client_max_body_size 5M;
    location / {
        include uwsgi_params;
        uwsgi_pass unix:[flask sock 文件路径];
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_connect_timeout 75;
        proxy_read_timeout 300;
        proxy_send_timeout 300;
        proxy_buffer_size 64k;
        proxy_buffers   4 64k;
        proxy_busy_buffers_size 128k;
        proxy_temp_file_write_size 128k;
    }

    # 配置无需负载均衡的api
    location /api/dog_classification/recognition {
        proxy_pass https://主服务器域名;
    }
}

至此配置完成，只需两个服务器中的api路径相同即可进行负载均衡，如果不需要负载均衡，则需要在副服务器配置，以免出现404.