ubuntu16.04 部署配置LVS主从

实验环境---ubuntu16.04

四台机器：10.211.55.13—55.16

• 具体实验环境配置如下：

  10.211.55.102  LVS_VIP

  10.211.55.13  LVS_MASTER

  10.211.55.14  LVS_SALVE

  10.211.55.15  WEB1

  10.211.55.16  WEB2

安装LVS与Keepalived

55.13（lvs master）做如下操作：

sudo apt install ipvsadm

sudo ipvsadm

 

sudo apt install keepalived -y

 

注意：配置文件目录/etc/keepalived/keepalived.conf，默认并没有配置文件，需要手动创建。

parallels@parallels-vm:~$ cat /etc/keepalived/keepalived.conf 

 

global_defs { 

 

    notification_email {  

 

        test@sina.com  

 

    }  

 

    notification_email_from admin@test.com 

 

    smtp_server 127.0.0.1 

 

    smtp_connect_timeout 30 

 

    router_id proxy1

 

} 

 

 

 

vrrp_instance VI_1 { 

 

    state MASTER 

 

    interface enp0s5

 

 

    virtual_router_id 70 

 

    priority 90

 

    advert_int 1 

 

    authentication { 

 

        auth_type PASS 

 

        auth_pass 1111 

 

    } 

 

    virtual_ipaddress { 

 

        10.211.55.102 

 

    } 

 

} 

 

 

 

virtual_server 10.211.55.102 8080 { 

 

    delay_loop 6 

 

    lb_algo rr  

 

    lb_kind DR 

 

    nat_mask 255.255.255.0 

 

    persistence_timeout 50 

 

    protocol TCP 

 

 

 

    real_server 10.211.55.15 8080 { 

 

        weight 1 

 

        TCP_CHECK { 

 

            connect_timeout 3 

 

            nb_get_retry 3 

 

            delay_before_retry 3 

 

        } 

 

    } 

 

 

 

    real_server 10.211.55.16 8080 { 

 

        weight 1 

 

        TCP_CHECK { 

 

            connect_timeout 3 

 

            nb_get_retry 3 

 

            delay_before_retry 3 

 

        } 

 

    } 

 

}

 

致此，master keepalived配置完毕.

打开ip forward功能：文件/etc/sysctl.conf

打开后修改里面“net.ipv4.ip_forward = 1”

执行如下命令使设置生效：

sudo sysctl -p

 

 

55.14（lvs slave）做如下操作：

sudo apt install ipvsadm

sudo ipvsadm

 

sudo apt install keepalived -y

 

注意：配置文件目录/etc/keepalived/keepalived.conf，默认并没有配置文件，需要手动创建。

parallels@parallels-vm:~$ cat /etc/keepalived/keepalived.conf 

 

bal_defs { 

 

    notification_email {  

 

        test@sina.com  

 

    }  

 

    notification_email_from admin@test.com 

 

    smtp_server 127.0.0.1 

 

    smtp_connect_timeout 30 

 

    router_id proxy2

 

} 

 

 

 

vrrp_instance VI_2 { 

 

    state SLAVE

 

    interface enp0s5 

 

    virtual_router_id 70 

 

    priority 50

 

    advert_int 1 

 

    authentication { 

 

        auth_type PASS 

 

        auth_pass 1111 

 

    } 

 

    virtual_ipaddress { 

 

        10.211.55.102 

 

    } 

 

} 

 

 

 

virtual_server 10.211.55.102 8080 { 

 

    delay_loop 6 

 

    lb_algo rr  

 

    lb_kind DR 

 

    nat_mask 255.255.255.0 

 

    persistence_timeout 50 

 

    protocol TCP 

 

 

 

    real_server 10.211.55.15 8080 { 

 

        weight 1 

 

        TCP_CHECK { 

 

            connect_timeout 3 

 

            nb_get_retry 3 

 

            delay_before_retry 3 

 

        } 

 

    } 

 

 

 

    real_server 10.211.55.16 8080 { 

 

        weight 1 

 

        TCP_CHECK { 

 

            connect_timeout 3 

 

            nb_get_retry 3 

 

            delay_before_retry 3 

 

        } 

 

    } 

 

}

打开ip forward功能：文件/etc/sysctl.conf

打开后修改里面“net.ipv4.ip_forward = 1”

执行如下命令使设置生效：

sysctl -p

接下来开启keepalived服务：LVS MASTER.    LVS  SLAVE都要操作如下：55.13  55.14

sudo systemctl start keepalived.service

查看keepalived进程：

[root@lvs keepalived-1.2.7]# sudo ps aux|grep keepalived

root     18485  0.0  0.0  42164   972 ?        Ss   11:43   0:00 keepalived -D

root     18486  0.0  0.2  46464  2376 ?        S    11:43   0:00 keepalived -D

root     18487  0.0  0.1  46340  1740 ?        S    11:43   0:00 keepalived -D

去master查看虚拟ip是否加上：注意如果虚拟ip没有自动加上，请重启下keepalived服务。虚拟ip :55.102(自定义)

parallels@parallels-vm:~$ ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: enp0s5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:1c:42:41:65:f6 brd ff:ff:ff:ff:ff:ff

inet 10.211.55.13/24 brd 10.211.55.255 scope global dynamic enp0s5

valid_lft 1117sec preferred_lft 1117sec

inet 10.211.55.102/32 scope global enp0s5

valid_lft forever preferred_lft forever

inet6 fdb2:2c26:f4e4:0:2d91:9984:fe45:63ca/64 scope global temporary dynamic

valid_lft 602038sec preferred_lft 83527sec

inet6 fdb2:2c26:f4e4:0:e00e:d6:1c91:3bea/64 scope global mngtmpaddr noprefixroute dynamic

valid_lft 2591853sec preferred_lft 604653sec

inet6 fe80::5806:a54:e63b:90c0/64 scope link

valid_lft forever preferred_lft forever

上述显示55.102虚拟ip加上了！

接下里配置部署两台web服务器:

配置部署10.211.55.15 web1:

配置虚拟IP启动脚本:

parallels@parallels-vm:~$ pwd

/home/parallels

parallels@parallels-vm:~$ cat realserver.sh

#Written by :NetSeek http://www.linuxtone.org

VIP=10.211.55.102

. /lib/init/vars.sh

. /lib/lsb/init-functions

case "$1" in

start)

ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP

/sbin/route add -host $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)

ifconfig lo:0 down

route del $VIP >/dev/null 2>&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

配置部署tomcat：

sudo apt-get install tomcat7 -y

启动tomcat服务：

sudo systemctl start tomcat7.service

为了测试负载均衡，我们将这个页面改下，以更好的标识这个网页是本服务器的

Tomcat7安装目录位于/usr/share/tomcat7，所以我们要编辑tomcat下的webapps/ROOT/index.html这个文件。

parallels@parallels-vm:/usr/share/tomcat7-root/default_root$ pwd

/usr/share/tomcat7-root/default_root

删掉此目录的index.html文件：sudo rm -f index.html

重新创建此目录的index.html文件，内容如下：

Sudo  touch /usr/share/tomcat7-root/default_root/index.html

parallels@parallels-vm:/usr/share/tomcat7-root/default_root$ cat index.html

web1 10.211.55.15

启动虚拟IP的脚本：

sudo sh realserver.sh start

去LVS_MASTER服务器的终端查看下ipvsadm，查看WEB1(55.15)服务器加到集群里:

sudo ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  10.211.55.102:8080 rr persistent 50

-> 10.211.55.15:8080             Route   1      0          0

上述可见：55.15已经加进来了！

此时我们访问网页http://10.211.55.15:8080，出现界面显示web1 10.211.55.15；或者使用命令行测试转发情况都可以查看。

配置部署10.211.55.16 web2:

配置虚拟IP启动脚本:

parallels@parallels-vm:~$ pwd

/home/parallels

parallels@parallels-vm:~$ cat realserver.sh

#Written by :NetSeek http://www.linuxtone.org

VIP=10.211.55.102

. /lib/init/vars.sh

. /lib/lsb/init-functions

case "$1" in

start)

ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP

/sbin/route add -host $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)

ifconfig lo:0 down

route del $VIP >/dev/null 2>&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

配置部署tomcat：

sudo apt-get install tomcat7 -y

启动tomcat服务：

sudo systemctl start tomcat7.service

为了测试负载均衡，我们将这个页面改下，以更好的标识这个网页是本服务器的

Tomcat7安装目录位于/usr/share/tomcat7，所以我们要编辑tomcat下的webapps/ROOT/index.html这个文件。

parallels@parallels-vm:/usr/share/tomcat7-root/default_root$ pwd

/usr/share/tomcat7-root/default_root

删掉此目录的index.html文件：sudo rm -f index.html

重新创建此目录的index.html文件，内容如下：

Sudo  touch /usr/share/tomcat7-root/default_root/index.html

parallels@parallels-vm:/usr/share/tomcat7-root/default_root$ cat index.html

Web2  10.211.55.16

启动虚拟IP的脚本：

sudo sh realserver.sh start

去LVS_MASTER服务器的终端查看下ipvsadm，查看WEB2服务器加到集群里:

sudo ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  10.211.55.102:8080 rr persistent 50

-> 10.211.55.15:8080            Route   1      0          0

-> 10.211.55.16:8080            Route   1      0          0

上述55.15 55.16两台web都已经加进来了

最后客户端测试：

浏览器输入：vip地址即10.211.55.102:8080

停掉其中一台keepalived，服务正常访问!