nginx配置负载均衡，nginx负载均衡

文章由LinuxBoy分享于2019-06-01 05:06:14热评（17）

nginx配置负载均衡，nginx负载均衡

创建用户组

groupadd nginx
useradd -g nginx nginx

便捷文件

vim /usr/local/nginx/conf/nginx.conf

user nginx nginx;

worker_processes 2;

error_log /usr/local/nginx/logs/nginx_error.log crit;

pid /usr/local/nginx/logs/nginx.pid;

#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;

events
{
use epoll;
worker_connections 65535;

}

http
{
include mime.types;
default_type application/octet-stream;

charset utf-8;

server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 300m;

sendfile on;
tcp_nopush     on;

keepalive_timeout 60;

tcp_nodelay on;

client_body_buffer_size 512k;
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;

gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;

#注：proxy_temp_path和proxy_cache_path指定的路径必须在同一分区
proxy_temp_path   /usr/local/www/proxy_temp_dir;
#设置Web缓存区名称为cache_one，内存缓存空间大小为200MB，1天没有被访问的内容自动清除，硬盘缓存空间大小为30GB。
proxy_cache_path /usr/local/www/proxy_cache_dir levels=1:2   keys_zone=cache_one:200m inactive=1d max_size=30g;

upstream backend_server {
    server   127.0.0.1:8080 weight=1 max_fails=2 fail_timeout=30s;
    server   127.0.0.1:9090 weight=1 max_fails=2 fail_timeout=30s;
    ip_hash;
}

server
{
    listen       80;
    server_name localhost;
    index index.html index.htm;
    root /usr/local/www/web/ROOT;

    location /
    {
         #如果后端的服务器返回502、504、执行超时等错误，自动将请求转发到upstream负载均衡池中的另一台服务器，实现故障转移。
         proxy_next_upstream http_502 http_504 error timeout invalid_header;
         proxy_cache cache_one;
         #对不同的HTTP状态码设置不同的缓存时间
         proxy_cache_valid 200 304 12h;
         #以域名、URI、参数组合成Web缓存的Key值，Nginx根据Key值哈希，存储缓存内容到二级缓存目录内
         proxy_cache_key $host$uri$is_args$args;
         proxy_set_header Host $host;
         proxy_set_header X-Forwarded-For $remote_addr;
         proxy_pass http://backend_server;
         expires      1d;
    }

    #用于清除缓存，假设一个URL为http://192.168.8.42/test.txt，通过访问http://192.168.8.42/purge/test.txt就可以清除该URL的缓存。
    location ~ /purge(/.*)
    {
     #设置只允许指定的IP或IP段才可以清除URL缓存。
     allow            127.0.0.1;
     allow            192.168.0.0/16;
     deny            all;
     proxy_cache_purge    cache_one   $host$1$is_args$args;
    }

    #扩展名以.php、.jsp、.cgi结尾的动态应用程序不缓存。
    location ~ .*\.(php|jsp|cgi)?$
    {
         proxy_set_header Host $host;
         proxy_set_header X-Forwarded-For $remote_addr;
         proxy_pass http://backend_server;
    }

access_log off;
}
}

创建缓存文件夹
#mkdir /usr/local/www/proxy_temp_dir
#mkdir /usr/local/www/proxy_cache_dir

启动NGINX
/usr/local/nginx/sbin/nginx
关闭NGINX
/usr/local/nginx/sbin/nginx -s stop
重启NGINX
/usr/local/nginx/sbin/nginx -s relo

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nginx配置负载均衡，nginx负载均衡