LVS-DR三种不同实现方式

╰+攻爆jí腚メ 2022-01-11 09:25 220阅读 0赞

# LVS-DR三种不同实现方式 #

## 1.VIP和DIP在同一网段的实现 ##

网络拓扑图  
![LVS-DR三种不同实现方式][LVS-DR]

### 配置环境 ###

配置Client网关指向route的RIP1

[root@client ~]# route -n
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
    0.0.0.0         172.22.27.20    0.0.0.0         UG    100    0        0 ens33
    172.22.0.0      0.0.0.0         255.255.0.0     U     100    0        0 ens33

route上开启路由间转发

[root@route ~]# echo 1 > /proc/sys/net/ipv4/ip_forward

### VS操作 ###

在director上将网关指向route的RIP2

[root@director ~]# route -n
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
    0.0.0.0         192.168.153.10  0.0.0.0         UG    100    0        0 ens33
    192.168.153.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33

执行脚本配置VS

[root@director ~]# bash lvs_dr_vs.sh start
    The VS Server is Ready!

脚本内容

#!/bin/bash
    vip='192.168.153.50'
    iface='lo:1'
    mask='255.255.255.255'
    port='80'
    rs1='192.168.153.30'
    rs2='192.168.153.40'
    scheduler='wrr'
    type='-g'
    rpm -q ipvsadm &> /dev/null || yum -y install ipvsadm &> /dev/null
    
    case $1 in
    start)
        ifconfig $iface $vip netmask $mask #broadcast $vip up
        iptables -F
    
        ipvsadm -A -t ${vip}:${port} -s $scheduler
        ipvsadm -a -t ${vip}:${port} -r ${rs1} $type -w 1
        ipvsadm -a -t ${vip}:${port} -r ${rs2} $type -w 1
        echo "The VS Server is Ready!"
        ;;
    stop)
        ipvsadm -C
        ifconfig $iface down
        echo "The VS Server is Canceled!"
        ;;
    *)
        echo "Usage: $(basename $0) start|stop"
        exit 1
        ;;
    esac

### RS操作 ###

分别在两台RS上将网关指向route的RIP2

[root@rs1 ~]# route -n
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
    0.0.0.0         192.168.153.10  0.0.0.0         UG    100    0        0 ens33
    192.168.153.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33

在RS端执行lvs配置脚本

[root@rs1 ~]# bash lvs_dr_rs.sh start
    The httpd Server is Ready!
    The RS Server is Ready!

脚本内容

#!/bin/bash
    vip=192.168.153.50
    mask='255.255.255.255'
    dev=lo:1
    rpm -q httpd &> /dev/null || yum -y install httpd &>/dev/null
    service httpd start &> /dev/null && echo "The httpd Server is Ready!"
    echo "<h1>`hostname`</h1>" > /var/www/html/index.html
    
    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 $dev $vip netmask $mask #broadcast $vip up
        #route add -host $vip dev $dev
        echo "The RS Server is Ready!"
        ;;
    stop)
        ifconfig $dev 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 "The RS Server is Canceled!"
        ;;
    *)
        echo "Usage: $(basename $0) start|stop"
        exit 1
        ;;
    esac

### 测试 ###

[root@client ~]# curl 192.168.153.50
    <h1>rs2</h1>
    [root@client ~]# curl 192.168.153.50
    <h1>rs1</h1>

--------------------

## 2.VIP和DIP不在同一网段 ##

网络拓扑图  
![LVS-DR三种不同实现方式][LVS-DR 1]

### 配置环境 ###

配置Client网关指向route的RIP1

route上开启路由间转发

[root@route ~]# echo 1 > /proc/sys/net/ipv4/ip_forward

在route上绑定一个IP用来接收RS的相应报文

[root@route ~]# ip a a 192.168.100.100/24 dev ens37

### VS端操作 ###

在director上将网关指向route的RIP2

执行脚本配置VS

[root@director ~]# bash lvs_dr_vs.sh start
    The VS Server is Ready!

脚本内容

#!/bin/bash
    vip='192.168.100.50'
    iface='lo:1'
    mask='255.255.255.255'
    port='80'
    rs1='192.168.153.30'
    rs2='192.168.153.40'
    scheduler='wrr'
    type='-g'
    rpm -q ipvsadm &> /dev/null || yum -y install ipvsadm &> /dev/null
    
    case $1 in
    start)
        ifconfig $iface $vip netmask $mask #broadcast $vip up
        iptables -F
    
        ipvsadm -A -t ${vip}:${port} -s $scheduler
        ipvsadm -a -t ${vip}:${port} -r ${rs1} $type -w 1
        ipvsadm -a -t ${vip}:${port} -r ${rs2} $type -w 1
        echo "The VS Server is Ready!"
        ;;
    stop)
        ipvsadm -C
        ifconfig $iface down
        echo "The VS Server is Canceled!"
        ;;
    *)
        echo "Usage: $(basename $0) start|stop"
        exit 1
        ;;
    esac

### RS操作 ###

分别在两台RS上将网关指向route的RIP2

在RS端执行lvs配置脚本

[root@rs1 ~]# bash lvs_dr_rs.sh start
    The httpd Server is Ready!
    The RS Server is Ready!

脚本内容

#!/bin/bash
    vip=192.168.100.50
    mask='255.255.255.255'
    dev=lo:1
    rpm -q httpd &> /dev/null || yum -y install httpd &>/dev/null
    service httpd start &> /dev/null && echo "The httpd Server is Ready!"
    echo "<h1>`hostname`</h1>" > /var/www/html/index.html
    
    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 $dev $vip netmask $mask #broadcast $vip up
        #route add -host $vip dev $dev
        echo "The RS Server is Ready!"
        ;;
    stop)
        ifconfig $dev 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 "The RS Server is Canceled!"
        ;;
    *)
        echo "Usage: $(basename $0) start|stop"
        exit 1
        ;;
    esac

### 测试 ###

[root@client ~]# curl 192.168.100.50
    <h1>rs2</h1>
    [root@client ~]# curl 192.168.100.50
    <h1>rs1</h1>

--------------------

## 3.VIP和DIP不在同一网段2（route使用一个ip地址） ##

网络拓扑图  
![LVS-DR三种不同实现方式][LVS-DR 2]

### 配置环境 ###

配置Client网关指向route的RIP1

route上开启路由间转发

[root@route ~]# echo 1 > /proc/sys/net/ipv4/ip_forward

在route上配置RIP2

[root@route ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens37
    IPADDR=192.168.100.100
    PREFIX=24

### RS配置 ###

执行RS配置脚本

[root@rs1 ~]# bash lvs_dr_rs.sh start
    The httpd Server is Ready!
    The RS Server is Ready!

脚本内容

#!/bin/bash
    vip=192.168.100.50
    mask='255.255.255.0'
    dev=ens33:1
    rpm -q httpd &> /dev/null || yum -y install httpd &>/dev/null
    service httpd start &> /dev/null && echo "The httpd Server is Ready!"
    echo "<h1>`hostname`</h1>" > /var/www/html/index.html
    
    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 $dev $vip netmask $mask #broadcast $vip up
        #route add -host $vip dev $dev
        echo "The RS Server is Ready!"
        ;;
    stop)
        ifconfig $dev 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 "The RS Server is Canceled!"
        ;;
    *)
        echo "Usage: $(basename $0) start|stop"
        exit 1
        ;;
    esac

将VS的网关指RIP2

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
    0.0.0.0         192.168.100.100 0.0.0.0         UG    0      0        0 ens33
    192.168.100.0   0.0.0.0         255.255.255.0   U     0      0        0 ens33
    192.168.153.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33

### VS配置 ###

为director配置地址

[root@director ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
    IPADDR=192.168.153.20
    PREFIX=24

执行vs配置脚本

[root@director ~]# bash lvs_dr_vs.sh start
    The VS Server is Ready!

脚本内容

#!/bin/bash
    vip='192.168.100.50'
    iface='ens33:1'
    mask='255.255.255.255'
    port='80'
    rs1='192.168.153.30'
    rs2='192.168.153.40'
    scheduler='wrr'
    type='-g'
    rpm -q ipvsadm &> /dev/null || yum -y install ipvsadm &> /dev/null
    
    case $1 in
    start)
        ifconfig $iface $vip netmask $mask #broadcast $vip up
        iptables -F
    
        ipvsadm -A -t ${vip}:${port} -s $scheduler
        ipvsadm -a -t ${vip}:${port} -r ${rs1} $type -w 1
        ipvsadm -a -t ${vip}:${port} -r ${rs2} $type -w 1
        echo "The VS Server is Ready!"
        ;;
    stop)
        ipvsadm -C
        ifconfig $iface down
        echo "The VS Server is Canceled!"
        ;;
    *)
        echo "Usage: $(basename $0) start|stop"
        exit 1
        ;;
    esac

### 测试 ###

[root@client ~]# curl 192.168.100.50
    <h1>rs2</h1>
    [root@client ~]# curl 192.168.100.50
    <h1>rs1</h1>
    [root@client ~]# curl 192.168.100.50
    <h1>rs2</h1>
    [root@client ~]# curl 192.168.100.50
    <h1>rs1</h1>

转载于:https://blog.51cto.com/11886307/2400433

[LVS-DR]: https://s1.51cto.com/images/blog/201905/26/4df6c4f835d92633f3903d5dc327f238.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=
[LVS-DR 1]: https://s1.51cto.com/images/blog/201905/26/396768978c254432b129b4539b2e18ba.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=
[LVS-DR 2]: https://s1.51cto.com/images/blog/201905/26/59c2c8ba47afde3161e5f33331dbfc67.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=