Debian 7 (wheezy)上配置LVS + keepalived

angle4

最近測試LVS+Keepalived, 正好才這里找些資料，就把自己的配置過程也分享下。

直接從 http://ox0spy.github.io/debian/2 ... epalived-on-debian/ 負責過來的，CU上格式不太好。

準備機器
LVS_MASTER - 172.16.8.129
LVS_BACKUP - 172.16.8.130
WEB_APP_SERVER_1 - 172.16.8.131
WEB_APP_SERVER_2 - 172.16.8.132
注:

virtual server: 172.16.8.252 (非真實機器, 只需要在web app server上配下這個IP)
所有機器都安裝的Debian 7.5 (wheezy)
安裝軟件
LVS_MASTER上安裝配置LVS和keepalived
$ ssh LVS_MASTER
$ sudo apt-get install ipvsadm keepalived
配置LVS
$ cat /etc/default/ipvsadm
# ipvsadm

# if you want to start ipvsadm on boot set this to true
AUTO="false"

# daemon method (none|master|backup)
DAEMON="master"

# use interface (eth0,eth1...)
IFACE="eth0"

# syncid to use
SYNCID="1"
配置keepalived
$ cat /etc/keepalived/keepalived.conf
global_defs {
   router_id LVS_MASTER   #BACKUP上修改為LVS_BACKUP
}

vrrp_instance VI_1 {
    state MASTER          #BACKUP上修改為BACKUP
    interface eth0
    virtual_router_id 51  #與備機的id必須一致
    priority 100          #BACKUP上修改為80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        172.16.8.252     #virtual server
    }
}

virtual_server 172.16.8.252 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    #lb_kind NAT
    #persistence_timeout 5
    protocol TCP

    real_server 172.16.8.131 80 {
        weight 3
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }

    real_server 172.16.8.132 80 {
        weight 3
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
}
LVS_BACKUP上安裝配置LVS和keepalived
$ ssh LVS_BACKUP
$ sudo apt-get install ipvsadm keepalived
配置LVS
$ cat /etc/default/ipvsadm
# ipvsadm

# if you want to start ipvsadm on boot set this to true
AUTO="false"

# daemon method (none|master|backup)
DAEMON="backup"

# use interface (eth0,eth1...)
IFACE="eth0"

# syncid to use
SYNCID="1"
配置keepalived
$ cat /etc/keepalived/keepalived.conf
global_defs {
   router_id LVS_BACKUP #BACKUP上修改為LVS_BACKUP
}

vrrp_instance VI_1 {
    state BACKUP          #BACKUP上修改為BACKUP
    interface eth0
    virtual_router_id 51  #與備機的id必須一致
    priority 80           #BACKUP上修改為80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        172.16.8.252     #virtual server
    }
}

virtual_server 172.16.8.252 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    #lb_kind NAT
    #persistence_timeout 5
    protocol TCP

    real_server 172.16.8.131 80 {
        weight 3
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }

    real_server 172.16.8.132 80 {
        weight 3
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
}
配置WEB_APP_SERVER_1
安裝nginx
$ ssh WEB_APP_SERVER_1
$ sudo apt-get install nginx
$ sudo bash -c 'echo "Web App Server 1" > /usr/share/nginx/www/index.html'
配置IP
$ sudo ifconfig eth0:0 172.16.8.252 netmask 255.255.255.255 up
修改配置文件 （上面的配置重啟后需要重新輸入命令）

$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
auto eth0
auto eth0:0

iface lo inet loopback

# The primary network interface
allow-hotplug eth0
#iface eth0 inet dhcp
iface eth0 inet static
        address 172.16.8.131
        netmask 255.255.255.0
        gateway 172.16.8.2

iface eth0:0 inet static
        address 172.16.8.252
        netmask 255.255.255.255
        gateway 172.16.8.2
配置WEB_APP_SERVER_2
安裝nginx
$ ssh WEB_APP_SERVER_2
$ sudo apt-get install nginx
$ sudo bash -c 'echo "Web App Server 2" > /usr/share/nginx/www/index.html'
配置IP
$ sudo ifconfig eth0:0 172.16.8.252 netmask 255.255.255.255 up
修改配置文件 （上面的配置重啟后需要重新輸入命令）

$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
auto eth0
auto eth0:0

iface lo inet loopback

# The primary network interface
allow-hotplug eth0
#iface eth0 inet dhcp
iface eth0 inet static
        address 172.16.8.132
        netmask 255.255.255.0
        gateway 172.16.8.2

iface eth0:0 inet static
        address 172.16.8.252
        netmask 255.255.255.255
        gateway 172.16.8.2
啟動LVS, keepalived
$ ssh LVS_MASTER
$ sudo service ipvsadm restart
$ sudo service keepalived restart
$ ssh LVS_BACKUP
$ sudo service ipvsadm restart
$ sudo service keepalived restart
測試
查看服務(wù)器狀態(tài)
$ while true; do curl 172.16.8.252; curl 172.16.8.252; sleep 1; done
Web App Server 1
Web App Server 2
Web App Server 1
Web App Server 2
...
$ ssh LVS_MASTER
$ sudo ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddressort Scheduler Flags
  -> RemoteAddressort           Forward Weight ActiveConn InActConn
TCP  172.16.8.252:80 rr
  -> 172.16.8.131:80              Route   3      0          29
  -> 172.16.8.132:80              Route   3      0          30
將WEB_APP_SERVER_1的nginx進程結(jié)束，查看效果
$ ssh WEB_APP_SERVER_1
$ sudo service nginx stop
$ while true; do curl 172.16.8.252; curl 172.16.8.252; sleep 1; done
curl: (7) couldn't connect to host
Web App Server 2
curl: (7) couldn't connect to host
Web App Server 2
curl: (7) couldn't connect to host
Web App Server 2
Web App Server 2
Web App Server 2
Web App Server 2
...
$ sudo ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddressort Scheduler Flags
  -> RemoteAddressort           Forward Weight ActiveConn InActConn
TCP  172.16.8.252:80 rr
  -> 172.16.8.132:80              Route   3      0          114
$ ssh WEB_APP_SERVER_1
$ sudo service nginx stop
$ while true; do curl 172.16.8.252; curl 172.16.8.252; sleep 1; done
Web App Server 1
Web App Server 2
Web App Server 1
Web App Server 2
...
將LVS_MASTER關(guān)閉，查看請求web app server的結(jié)果
$ ssh LVS_MASTER
$ sudo shutdown -h now
$ while true; do curl 172.16.8.252; curl 172.16.8.252; sleep 1; done
Web App Server 1
Web App Server 2
Web App Server 1
Web App Server 2
...

niao5929

好貼一定要頂�。。�！