Linux record -Nginx + Tomcat load balancing configuration

Nginx configuration and load balancing strategies:

Polling (default)

Advantages: simple
drawback: not considering processing capacity of each server
configuration example as follows:
upstream www.xxx.com {
# required by the load server list
server www.xxx.com:8080;
server www.xxx.com:9080;
}
weight, more strategies to use
advantages: the different considerations for each server processing power, high-performance machines which give the right to which high weight machine
configuration examples are as follows:
upstream www.xxx.com {
# need to load the server list, weight represents the weight, weight defaults to 1, if a plurality of weights arranged nodes, compare the relative value
Server www.xxx.com:8080 weight = 15;
Server www.xxx.com:9080 weight = 10;
}
IP the hash
advantages : one and the same user can always access the same server
drawback: the ip hash does not necessarily mean
a configuration example as follows:
upstream www.xxx.com {
ip_hash;
# required by the load server list
server www.xxx.com:8080;
server WWW. xxx.com:9080;
}
URL the hash (third-party plug-ins)
Advantages: can achieve the same service to access the same server, which is based on load url
Cons: ip hash and the same, not necessarily the average request, the request url frequent requests to the same server based on url hash assignment
configuration examples are as follows (required pre-installed plug-in)
upstream www.xxx.com {
# required by the load server list
server www.xxx.com:8080;
server www.xxx.com:9080;
; the hash $ REQUEST_URI
}
Fair (third-party plug-ins)
press: characteristics the response time of the server side is preferentially allocated to an allocation request, the response time is short,
a configuration example as follows (need to install plug)
upstream www.xxx.com {
# required by the load server list
server www.xxx.com:8080;
server www.xxx .com: 9080;
Fair;
}
Some load-balancing parameters of Introduction:

upstream www.xxx.com {
ip_hash;
# 需要负载的server列表
server www.xxx.com:8080 down; # down表示当前的server暂时不参与负载
server www.xxx.com:9080 weight=2; # weight默认值为1，weight的值越大，负载的权重就越大
server www.xxx.com:7080 backup; # 其他所有的非backup机器，在down掉或者很忙的时候，才请求backup机器，也就是一个备用机器
server www.xxx.com:6080;
}

1.安装两个tomcat实例

要修改8005  8080  8009三个端口   以免冲突

修改index.jsp分别加入<h2>I 'm 8088</h2>   <h2>I 'm 8089</h2>

启动服务：sh startup.sh

2.配置nginx

nginx.conf

user nobody nobody;
worker_processes 2;
#error_log /usr/local/nginx/logs/nginx_error.log crit;
#pid /usr/local/nginx/logs/nginx.pid;
worker_rlimit_nofile 51200;
events
{
    use epoll;
    worker_connections 6000;
}
http
{
    include mime.types;
    default_type application/octet-stream;
    server_names_hash_bucket_size 3526;
    server_names_hash_max_size 4096;
    log_format combined_realip '$remote_addr $http_x_forwarded_for [$time_local]'
    ' $host "$request_uri" $status'
    ' "$http_referer" "$http_user_agent"';
    sendfile on;
    tcp_nopush on;
    keepalive_timeout 30;
    client_header_timeout 3m;
    client_body_timeout 3m;
    send_timeout 3m;
    connection_pool_size 256;
    client_header_buffer_size 1k;
    large_client_header_buffers 8 4k;
    request_pool_size 4k;
    output_buffers 4 32k;
    postpone_output 1460;
    client_max_body_size 10m;
    client_body_buffer_size 256k;
    #client_body_temp_path /usr/local/nginx/client_body_temp;
    #proxy_temp_path /usr/local/nginx/proxy_temp;
    #fastcgi_temp_path /usr/local/nginx/fastcgi_temp;
    fastcgi_intercept_errors on;
    tcp_nodelay on;
    gzip on;
    gzip_min_length 1k;
    gzip_buffers 4 8k;
    gzip_comp_level 5;
    gzip_http_version 1.1;
    gzip_types text/plain application/x-javascript text/css text/htm 
    application/xml;
    add_header Access-Control-Allow-Origin *;
    include /etc/nginx/conf.d/*.conf;
}

vim /etc/nginx/conf.d/tomcat.conf

upstream 192.168.66.128 {
        server 192.168.66.128:8088 weight=1;
        server 192.168.66.128:8089 weight=3;
}

server {
    listen       80;
    autoindex on;
    server_name  _;
    access_log /usr/local/nginx/logs/access.log combined;
    index index.html index.htm index.jsp;
    root         /usr/share/nginx/html/;

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

    location / {
        proxy_pass http://192.168.66.128;
        add_header Access-Control-Allow-Origin *;
    }
    error_page 404 /404.html;
        location = /40x.html {
    }

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

nginx -t 检测配置是否正确

启动服务   nginx

查看端口是否监听

lsof  -i:80

lsof  -i:89

然后浏览器输入

192.168.66.128

 

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