Linux下搭建keepalive+nginx

 

一、 安裝nginx（略）

二、 安裝keepalive

1. 下載http://www.keepalived.org/download.html
2. 安裝依賴包 yum install –y popt* gcc* openssl* nmap
3. tar fvxz keepalived-1.2.15.tar.gz
4. cd keepalived-1.2.15
5. ./configure –prefix=/usr/local/keepalived
6. make && make installmkdir /etc/keepalived  ##為keepalived創建配置文件目錄，默認配置文件從/etc/keepalived下讀取
7. cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ ##復制keepalived的二進制命令  
8. cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/  ##提供啟動腳本
9. cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ ##keepalived的主
10. cp /usr/local/keepalived/ety/sysconfig/keepalived /usr/sysconfig/

 

三、 配置keepalive

1．  打開配置文件vim /etc/keepalived/keepalived.conf

 

! Configuration File for keepalived

 

global_defs {

   notification_email {

     [e-mail]

     [e-mail]

   }

   notification_email_from [e-mail]

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

}

vrrp_script chk_http_port {

    script "/opt/nginx.sh"  #檢測nginx是否存活腳本位置（下面會有定義腳本名）

    interval 2

    weight 2

}

 

vrrp_instance VI_1 {

    state MASTER # 主   （備用 BACKUP）

    interface eth0       #本機ip網卡名稱

    virtual_router_id 10  # 每組keepalive routeid相同，不同組不能一樣

    mcast_src_ip 192.168.102.79  #本機ip 備機用備機ip

    priority 100  #權重 備機數值要比主的數值小

    advert_int 1  # 檢查間隔

    authentication {

        auth_type PASS

        auth_pass 1111222

    }

track_script {

    chk_http_port  #定義nginx檢測腳本名稱

}

    virtual_ipaddress {

        192.168.102.89  #虛擬ip

    }

}

啟動主備的keepalived驗證

nginx.sh 腳本 備機可以不用定義腳本相關選項

 

#!/bin/sh

# check nginx server status

NGINX=/usr/local/nginx/sbin/nginx

PORT=80

 

nmap localhost -p $PORT | grep "$PORT/tcp open"

#echo $?

if [ $? -ne 0 ];then

    $NGINX -s stop

    $NGINX

    sleep 3

    nmap localhost -p $PORT | grep "$PORT/tcp open"

    [ $? -ne 0 ] && /etc/init.d/keepalived stop

fi

把腳本加上執行權限后放到/opt/目錄下