CentOS6.6環境下佈署LVS+keepalived

時間 2021-02-14

標籤 nginx web 算法 bash 服務器負載均衡 ide oop 測試 spa 欄目 CentOS 简体版

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CentOS6.6 環境下佈署LVS+keepalivednginx

環境：web

操做系統 Centos 6.6 _X64
算法

WEB nginxbash

結構:服務器

         LVS-MASTER：10.6.1.210
         LVS-BACKUP: 10.6.1.211
         LVS-VIP: 192.168.1.214
         Realsever: 10.6.1.212,10.6.1.213負載均衡

一．Keepalived主備服務器配置ide

配置服務器時間同步（全部服務器都須要配置）。oop

yum install -y ntp
ntpdate time.nist.gov測試

crontab –e
00 01 * * * /usr/sbin/ntpdate time.nist.gov>/dev/null 2>&1 spa

安裝LVS和Keepalived (主備機上都須要安裝)

Yum install Ipvsadm keepalived –y

修改keepalived配置文件。

rpm -ql keepalived 查看配置文件全部目錄

[root@master ~]# vi/etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
      test@163.com
   }
   notification_email_from test@163.com
   smtp_server 127.0.0.1
# smtp_connect_timeout 30
   router_id LVS_DEVEL
}

# VIP1
vrrp_instance VI_1 {
    stateMASTER                  #備份服務器上將MASTER改成BACKUP
    interface eth0
    virtual_router_id 51
    priority 100               # 備份服務上將100改成90
    advert_int 5
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.6.1.214
        #(若是有多個VIP，繼續換行填寫.)
    }
}

virtual_server 10.6.1.214 80 {
    delay_loop6                 #(每隔10秒查詢realserver狀態)
    lb_algowlc                 #(lvs 算法)
    lb_kindDR                 #(Direct Route)
    persistence_timeout60        #(同一IP的鏈接60秒內被分配到同一臺realserver)
    protocolTCP               #(用TCP協議檢查realserver狀態)

    real_server 10.6.1.212 80 {
        weight100              #(權重)
        TCP_CHECK {
        connect_timeout10       #(10秒無響應超時)
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
    real_server 192.168.9.213 80 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
     }
}

啓動keepalived服務並加入自啓動列表

[root@master~]# service keepalived start|stop
[root@master ~]# chkconfig keepalived on

複製配置文件到備機上面.

# scp keepalived.conf root@10.6.1.211:/etc/keepalived/

並作相應修改。主要有兩個地方，上面已經用紅色標出。

# VIP1
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 90

二．配置realserver，在realserver上安裝nginx服務和配置nginx文件等，此處省略。

寫執行腳本,本腳本主要做用是忽略ARP廣播。(每臺realserver上都要執行)

[root@web_1~]# vi /root/lvs_real.sh

**********************************************************

#!/bin/bash

SNS_VIP=192.168.1.214
. /etc/rc.d/init.d/functions

case "$1" in
start)
       /sbin/ifconfig lo:0 $SNS_VIP netmask255.255.255.255 broadcast $SNS_VIP
       /sbin/route add -host $SNS_VIP dev lo:0
       echo "1">/proc/sys/net/ipv4/conf/lo/arp_ignore
       echo "2">/proc/sys/net/ipv4/conf/lo/arp_announce
       echo "1">/proc/sys/net/ipv4/conf/all/arp_ignore
       echo "2">/proc/sys/net/ipv4/conf/all/arp_announce
       sysctl -p >/dev/null 2>&1
       echo "RealServer Start OK"

       ;;
stop)
       /sbin/ifconfig lo:0 down
       /sbin/route del $SNS_VIP >/dev/null2>&1
       echo "0">/proc/sys/net/ipv4/conf/lo/arp_ignore
       echo "0">/proc/sys/net/ipv4/conf/lo/arp_announce
       echo "0">/proc/sys/net/ipv4/conf/all/arp_ignore
       echo "0">/proc/sys/net/ipv4/conf/all/arp_announce
       echo "RealServer Stoped"
       ;;
*)
       echo "Usage: $0 {start|stop}"
       exit 1
esac

exit 0