nginx做负载均衡+keepalived(做主备)

部署Nginx

一，安装nginx依赖:
 查看是否已经安装
 rpm -qa |grep gcc
 rpm -qa |grep openssl-devel
 rpm -qa |grep pcre-devel
 rpm -qa |grep zib-devel

安装：
 yum -y install 上面的依赖

二，安装nginx

./configuration
make
make install

Configuration summary
  + using system PCRE library
  + OpenSSL library is not used
  + md5: using system crypto library
  + sha1: using system crypto library
  + using system zlib library

nginx path prefix: "/usr/local/nginx"
  nginx binary file: "/usr/local/nginx/sbin/nginx"
  nginx configuration prefix: "/usr/local/nginx/conf"
  nginx configuration file: "/usr/local/nginx/conf/nginx.conf"
  nginx pid file: "/usr/local/nginx/logs/nginx.pid"
  nginx error log file: "/usr/local/nginx/logs/error.log"
  nginx http access log file: "/usr/local/nginx/logs/access.log"
  nginx http client request body temporary files: "client_body_temp"
  nginx http proxy temporary files: "proxy_temp"
  nginx http fastcgi temporary files: "fastcgi_temp"
  nginx http uwsgi temporary files: "uwsgi_temp"
  nginx http scgi temporary files: "scgi_temp"

/usr/local/nginx/conf/
上传已经配置好的proxy.conf&&nginx.conf

nginx.conf:

#user  nobody;
worker_processes  9;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
error_log  logs/error.log  error;

pid        logs/nginx.pid;

events {
    worker_connections  8000;
}

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

    #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  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    upstream myserver{
           #ip_hash;
    server 192.168.1.201:9276;
    server 192.168.1.201:9277;
    server 192.168.1.202:9276;
    }

    server {
        listen       9288;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
        proxy_pass http://myserver;
        proxy_next_upstream http_500 http_503 error timeout invalid_header;
        include /usr/local/nginx/conf/proxy.conf;
            #root   html;
            #index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }

    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

红色表示需要根据实际修改的地方！

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_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;

启动：
/usr/local/nginx/sbin/nginx

检查配置文件(修改后是否正确)
/usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf

主从备份：keepalived

tar zxvf keepalived-1.2.7.tar.gz
cd keepalived-1.2.7
./configure
make
make install

cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/sbin/keepalived /usr/sbin/

配置:

/etc/keepalived/keepalived.conf

主：

! Configuration File for keepalived

global_defs {
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 78
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

   virtual_ipaddress {
        192.168.1.233
        #192.168.1.234
    }
}
#    delay_loop 2
#    lb_algo rr
#    lb_kind DR
#    nat_mask 255.255.255.0
#    persistence_timeout 1
#    protocol TCP

#    real_server 192.168.1.204 9496 {
#        weight 1
#        TCP_CHECK {
#            connect_timeout 2
#            nb_get_retry 2
#            delay_before_retry 2
#        }
#    }
#}

从：

! Configuration File for keepalived

global_defs {
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 78
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

   virtual_ipaddress {
        192.168.1.233
        #192.168.1.234
    }
}
#    delay_loop 2
#    lb_algo rr
#    lb_kind DR
#    nat_mask 255.255.255.0
#    persistence_timeout 1
#    protocol TCP

#    real_server 192.168.1.204 9496 {
#        weight 1
#        TCP_CHECK {
#            connect_timeout 2
#            nb_get_retry 2
#            delay_before_retry 2
#        }
#    }
#}

/etc/init.d/keepalived start
/etc/init.d/keepalived stop

加入启动服务

echo "/usr/local/nginx/sbin/nginx" >> /etc/rc.local

echo "/etc/init.d/keepalived start" >> /etc/rc.local

这里上传已经好的配置文件：

下载