nginx 负载均衡配置

🧙 Questions

配置nginx负载均衡

☄️ Ideas

安装nginx服务

sudo yum install nginx -y

启动nginx服务

nginx

检测服务： http://39.100.69.110

配置nginx服务

vim /etc/nginx/nginx.conf

推荐都使用内网
负载策略有：
默认为轮询算法，一直轮询
权重法，权重越高负载量越大，weight
IP哈希，ip_hash; 同一客户端的请求总是分配到同一台服务器
最少连接，least_conn;将请求分配给当前活动连接数最少的服务器

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    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  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 4096;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    ######### 配置upstream负载 ###########
    ## weight： 权重分流
    ## max_fails：最大失败次数，标记为不可用
    ## fail_timeout： 标记失败的服务器，在时间内容重新检测，标记为可用
    upstream zhiqingyun_servers {
      server 172.16.215.86:8080 weight=1 max_fails=3 fail_timeout=60s;
      server 172.16.215.85:8080 weight=1 max_fails=3 fail_timeout=60s;
      # 所有节点挂掉后使用
      server 172.16.215.84:8080 backup;
    }
    #####################################

    server {
        listen       80;
        listen       [::]:80;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        error_page 404 /404.html;
        location = /404.html {
        }

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
        }

        ######### 映射根目录 ###########
        location / {
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_pass http://zhiqingyun_servers/;
        }
        ##############################

    }

# Settings for a TLS enabled server.
#
#    server {
#        listen       443 ssl http2;
#        listen       [::]:443 ssl http2;
#        server_name  _;
#        root         /usr/share/nginx/html;
#
#        ssl_certificate "/etc/pki/nginx/server.crt";
#        ssl_certificate_key "/etc/pki/nginx/private/server.key";
#        ssl_session_cache shared:SSL:1m;
#        ssl_session_timeout  10m;
#        ssl_ciphers HIGH:!aNULL:!MD5;
#        ssl_prefer_server_ciphers on;
#
#        # Load configuration files for the default server block.
#        include /etc/nginx/default.d/*.conf;
#
#        error_page 404 /404.html;
#            location = /40x.html {
#        }
#
#        error_page 500 502 503 504 /50x.html;
#            location = /50x.html {
#        }
#    }
}

重点修改

推荐使用内网

upstream zhiqingyun_servers {
  server 172.16.215.86:8080 weight=1 max_fails=1 fail_timeout=60s;
  server 172.16.215.87:8080 weight=1 max_fails=1 fail_timeout=60s;
  # 备份，平时不是访问这个节点，一旦上面两个挂了，就会访问这个节点
  server 172.16.215.83:8080 backup;
}

location / {
  client_max_body_size 100M;
  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_pass http://zhiqingyun_servers/;
}

启动服务

重启服务

nginx -s reload

查看nginx的访问日志

tail -f /var/log/nginx/access.log

🔗 Links

• nginx docs