centos6.5安装nginx+keepalived实现高可用负载均衡

lb01 192.168.56.50 nginx主负载均衡器

lb02 192.168.56.51 nginx辅负载均衡器

web01 192.168.56.52 apache web01服务器

web02 192.168.56.53 apache web02服务器

防火墙和selinux都关闭，主机之间时间同步

chkconfig iptables off

yum -y install gcc gcc-c++ make

yum -y install wget

yum -y install pcre-devel

yum -y install openssl-devel

yum -y install popt-devel

wget http://nginx.org/download/nginx-1.6.2.tar.gz
wget http://keepalived.org/software/keepalived-1.2.18.tar.gz
安装配置nginx的反向代理

useradd -s /sbin/nologin -M nginx

./configure --user=nginx --group=nginx --prefix=/application/nginx-1.6.2 --with-http_stub_status_module --with-http_ssl_module --with-http_realip_module

make && make install

创建软连接

ln -s /application/nginx-1.6.2/ /application/nginx

检查语法

/application/nginx/sbin/nginx -t

启动nginx

/application/nginx/sbin/nginx

/application/nginx/sbin/nginx -s reload

检查nginx端口

netstat -lntup|grep nginx

lsof -i :80

curl 192.168.56.50

[root@lb01 conf]# cat /application/nginx/conf/nginx.conf

error_log logs/error.log error;

worker_processes 4;

events {

worker_connections 1024;

use epoll;

}

http {

server_tokens off;

gzip on;

gzip_min_length 1k;

gzip_buffers 4 32k;

gzip_comp_level 3;

gzip_types text/css text/xml application/javascript;

gzip_vary on;

include mime.types;

default_type application/octet-stream;

sendfile on;

keepalive_timeout 65;

log_format main '$remote_addr - $remote_user [$time_local] "$request" '

'$status $body_bytes_sent "$http_referer" '

'"$http_user_agent" "$http_x_forwarded_for"';

include extra/upstream01.conf;

}

[root@lb01 extra]# cat /application/nginx/conf/extra/proxy.conf

proxy_redirect off;

proxy_set_header Host $host;

proxy_set_header X-Real-IP $remote_addr;

proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

client_max_body_size 50m;

client_body_buffer_size 256k;

proxy_connect_timeout 30;

proxy_send_timeout 30;

proxy_read_timeout 60;

proxy_buffer_size 4k;

proxy_buffers 4 32k;

proxy_busy_buffers_size 64k;

proxy_temp_file_write_size 64k;

proxy_next_upstream error timeout invalid_header http_500 http_503 http_404;

proxy_max_temp_file_size 128m;

proxy_store on;

proxy_store_access user:rw group:rw all:r;

#proxy_temp_path /dev/shm/nginx_proxy;

#proxy_temp_path /data2/nginx_cache;

[root@lb01 extra]# cat /application/nginx/conf/extra/upstream01.conf

upstream blog_real_servers {

server 192.168.56.52:80 weight=5;

server 192.168.56.53:80 weight=5;

}

server {

listen 80;

server_name blog.etiantian.org;

location / {

proxy_pass http://blog_real_servers;
}

}

安装配置keepalived

mkdir /application

tar -xvf keepalived-1.2.18.tar.gz

cd keepalived-1.2.18

./configure --prefix=/application/keepalived

make && make install

cp /application/keepalived/sbin/keepalived /usr/sbin/

cp /application/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

cp /application/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

ip add

/etc/init.d/keepalived start