LVS+Keepalived雙主模型的實現

阿新 • • 發佈：2019-01-14

拓撲結構：

Client	LVS1	LVS2	RS1	RS2
192.168.2.1	DIP 192.168.2.128 VIP 192.168.2.198	DIP 192.168.2.129 VIP 192.168.2.199	192.168.2.130	192.168.2.131

實現雙主模型我們需要配置兩個虛擬路由器組，也就是每臺主機需要配置兩段 vrrp_instance，每個虛擬介面配置虛擬IP，LVS1與LVS2的同一組virtual_router_id內互為主備，這裡如果不明白可以檢視VRRP的實現原理或者稍後看配置資訊，RS1與RS2在雙主模式下需要配置兩組路由，當收到來自VIP1的請求交給lo:0的網絡卡處理，收到來自VIP2的請求交給lo:1的網絡卡處理

上配置：

###########################           LVS1配置          ######################### 

yum install nginx -y
echo "對不起，伺服器正在維護..' > /usr/share/nginx/html/index.html
systemctl start nginx

! Configuration File for keepalived

global_defs {           ##對於郵件報警，先簡單配置為本地的郵箱,而且這裡的郵件報警也比較雞肋，後面我們藉助keepalive呼叫指令碼的能力再開發報警或者藉助zabbix這種專業級程式
   notification_email {
         
[email protected]       
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id node1                   ##設定為主機名，唯一
   vrrp_mcast_group4 224.0.0.112     ##組播地址
}

###  配置虛擬IP配置區域 

vrrp_instance VI_1 {
    state MASTER                    #狀態分為MASTER | BACKUP
    interface eno16777736           ##浮動ip繫結在哪一個物理介面
    virtual_router_id 31            ##虛擬路由器id，和另一臺設定為一致
    priority 100                    ##優先順序
    advert_int 1                    ##心跳檢測頻率，預設1s
#    nopreempt                       ##非搶佔模式
    authentication {
        auth_type PASS
        auth_pass f1GDsVH6      ##VRRP組播，和同一組虛擬vip保持一致
    }
    virtual_ipaddress {
        192.168.2.198/24 dev eno16777736 label eno16777736:1    ##設定vip地址
    }

    notify_master "/etc/keepalived/scripts/notify.sh master"      ##狀態變更為master時執行指令碼
    notify_backup "/etc/keepalived/scripts/notify.sh backup"     ##狀態變更為backup時執行指令碼
    notify_fault "/etc/keepalived/scripts/notify.sh fault"     ##狀態發生故障時執行指令碼
}

vrrp_instance VI_2 {
    state BACKUP
    interface eno16777736
    virtual_router_id 32
    priority 98
    advert_int 1
#    nopreempt
    authentication {
        auth_type PASS
        auth_pass f1GDsV78
    }
    virtual_ipaddress {
        192.168.2.199/24 dev eno16777736 label eno16777736:2
    }

    notify_master "/etc/keepalived/scripts/notify.sh master"      ##狀態變更為master時執行指令碼
    notify_backup "/etc/keepalived/scripts/notify.sh backup"     ##狀態變更為backup時執行指令碼
    notify_fault "/etc/keepalived/scripts/notify.sh fault"     ##狀態發生故障時執行指令碼

}

###  LVS規則配置區域
##由於是雙主模型，我們需要配置兩組VIP的叢集，當LVS2宕機時，LVS2虛擬IP漂移到本機，我們需要LVS1上有192.168.2.199的叢集配置，反之LVS2也要配置192.168.2.198的叢集配置

virtual_server 192.168.2.198 80 {
    delay_loop 1
    lb_algo wlc
    lb_kind DR
#   persistence_timeout 300
    protocol TCP
    sorry_server 127.0.0.1 80
  real_server 192.168.2.130 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }

  real_server 192.168.2.131 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }

}

virtual_server 192.168.2.199 80 {
    delay_loop 1
    lb_algo wlc
    lb_kind DR
#   persistence_timeout 300
    protocol TCP
    sorry_server 127.0.0.1 80
  real_server 192.168.2.130 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }

  real_server 192.168.2.131 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }
}

###########################           LVS2配置          #########################
yum install nginx -y
echo "對不起，伺服器正在維護..' > /usr/share/nginx/html/index.html
systemctl start nginx

! Configuration File for keepalived

global_defs {           ##對於郵件報警，先簡單配置為本地的郵箱,而且這裡的郵件報警也比較雞肋，後面我們藉助keepalive呼叫指令碼的能力再開發報警或者藉助zabbix這種專業級程式
   notification_email {
         
[email protected]       
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id node2                   ##設定為主機名，唯一
   vrrp_mcast_group4 224.0.0.112     ##組播地址
}

vrrp_instance VI_1 {
    state BACKUP                    #狀態分為MASTER | BACKUP
    interface eno16777736           ##浮動ip繫結在哪一個物理介面
    virtual_router_id 31            ##虛擬路由器id，和另一臺設定為一致
    priority 98                     ##優先順序
    advert_int 1                    ##心跳檢測頻率，預設1s
#    nopreempt                       ##非搶佔模式
    authentication {
        auth_type PASS
        auth_pass f1GDsVH6      ##VRRP組播，和同一組虛擬vip保持一致
    }
    virtual_ipaddress {
        192.168.2.198/24 dev eno16777736 label eno16777736:1    ##設定vip地址
    }

    notify_master "/etc/keepalived/scripts/notify.sh master"      ##狀態變更為master時執行指令碼
    notify_backup "/etc/keepalived/scripts/notify.sh backup"     ##狀態變更為backup時執行指令碼
    notify_fault "/etc/keepalived/scripts/notify.sh fault"     ##狀態發生故障時執行指令碼
}

vrrp_instance VI_2 {
    state MASTER
    interface eno16777736
    virtual_router_id 32
    priority 100
    advert_int 1
#    nopreempt
    authentication {
        auth_type PASS
        auth_pass f1GDsV78
    }
    virtual_ipaddress {
        192.168.2.199/24 dev eno16777736 label eno16777736:2
    }

    notify_master "/etc/keepalived/scripts/notify.sh master"      ##狀態變更為master時執行指令碼
    notify_backup "/etc/keepalived/scripts/notify.sh backup"     ##狀態變更為backup時執行指令碼
    notify_fault "/etc/keepalived/scripts/notify.sh fault"     ##狀態發生故障時執行指令碼
}

virtual_server 192.168.2.198 80 {
    delay_loop 1
    lb_algo wlc
    lb_kind DR
#   persistence_timeout 300
    protocol TCP
    sorry_server 127.0.0.1 80
  real_server 192.168.2.130 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }

  real_server 192.168.2.131 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }

}

virtual_server 192.168.2.199 80 {
    delay_loop 1
    lb_algo wlc
    lb_kind DR
#   persistence_timeout 300
    protocol TCP
    sorry_server 127.0.0.1 80
  real_server 192.168.2.130 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }

  real_server 192.168.2.131 80{
    weight 1
    TCP_CHECK {
            connect_port 80
        connect_timeout 1
            nb_get_retry 2
        delay_before_retry 1
    }
  }
}

########################   RS1配置   ########################
yum install nginx -y
echo "192.168.2.130' > /usr/share/nginx/html/index.html
systemctl start nginx
## 執行指令碼 set_lvs_rs.sh
bash set_lvs_rs.sh start

########################   RS2配置   ########################
yum install nginx -y
echo "192.168.2.131' > /usr/share/nginx/html/index.html
systemctl start nginx
## 執行指令碼 set_lvs_rs.sh
bash set_lvs_rs.sh start

到此LVS+keepalived的雙主模型已經完成，通過測試我們可以得到：
1、DNS輪巡，當LVS1與LVS2無異常時同時正常工作。
2、當LVS1或任意其中一臺宕機時，浮動IP飄逸至另一臺主機，兩個VIP都仍然正常工作
3、當NGINX任意一臺TCP 80埠4層檢測不正常，keepalived自動將其從規則刪除，反之自動新增
4、當NGINX同時全部宕機，keepalived臨時提供sorry server
5、當vip發生變更keepalived將自動傳送郵件通知管理員

set_lvs_rs.sh 指令碼內容：

#!/bin/bash
#
vip1='192.168.2.198'
vip2='192.168.2.199'
mask='255.255.255.255'

case $1 in
start)
    echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
    echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
    echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce

    ifconfig lo:0 $vip1 netmask $mask broadcast $vip1 up
    ifconfig lo:1 $vip2 netmask $mask broadcast $vip2 up
    route add -host $vip1 dev lo:0
    route add -host $vip2 dev lo:1
    ;;
stop)
    ifconfig lo:0 down
    ifconfig lo:1 down

    echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
    echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
    echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce

    ;;
*)
    echo "Usage $(basename $0) start|stop"
    exit 1
    ;;
esac

notify.sh指令碼內容：

[[email protected] scripts]# cat notify.sh 
#!/bin/bash
#
contact='[email protected]'

notify() {
        local mailsubject="$(hostname) to be $1, vip floating"
        local mailbody="$(date +'%F %T'): vrrp transition, $(hostname) changed to be $1"
        echo "$mailbody" | mail -s "$mailsubject" $contact
}

case $1 in
master)
        notify master
        ;;
backup)
        notify backup
        ;;
fault)
        notify fault
        ;;
*)
        echo "Usage: $(basename $0) {master|backup|fault}"
        exit 1
        ;;
esac

LVS+Keepalived雙主模型的實現

LVS+Keepalived雙主模型的實現

keepalived雙主模式實現nginx高可用及LNAMMP架構

Nginx+Keepalived雙主架構實現

實現雙例項（lvs+keepalived）【雙主模型】

LVS/NAT雙主 + keepalived負載均衡實現

Linux環境下實現keepalive支援的LVS高可用性和NGINX的單主模型雙主模型高可用

keepalived + lvs + nginx 雙主配置案例 (2)

Keepalived單雙主模型配置

keepalived高可用nginx/htttpd,雙主模型

實現雙主模型NGINX架構

keepalived+雙主實現數據庫的高可用

[轉] Haproxy、Keepalived雙主高可用負載均衡

MySQL keepalived 雙主.md

LVS+keepalived+nginx+tomcat部署實現

數據庫之 Mysql的主主同步（雙主模型）

LVS+Keepalived+Mysql+主備數據庫架構

LVS+Keepalived+Mysql+主主數據庫架構[2臺]

keepalive單主雙主模型的配置

MaridDB主從復制，雙主模型，半同步的配置

Mysql5.7.22+Keepalived雙主互備高可用集群

LVS+Keepalived雙主模型的實現

相關推薦