ubuntu16.04 部署配置LVS主從

實驗環境---ubuntu16.04html

四臺機器：10.211.55.13—55.16linux

具體實驗環境配置以下：web

10.211.55.102 LVS_VIPubuntu

10.211.55.13 LVS_MASTER瀏覽器

10.211.55.14 LVS_SALVEtomcat

10.211.55.15 WEB1服務器

10.211.55.16 WEB2app

安裝LVS與Keepalived

55.13（ lvs master）作以下操做：

sudo apt install ipvsadm

sudo ipvsadm

sudo apt install keepalived -y

注意：配置文件目錄/etc/keepalived/keepalived.conf，默認並無配置文件，須要手動建立。

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配置完畢.

打開ip forward功能：文件/etc/sysctl.conf負載均衡

打開後修改裏面「net.ipv4.ip_forward = 1」webapp

執行以下命令使設置生效：

sudo sysctl -p

55.14（ lvs slave）作以下操做：

sudo apt install ipvsadm

sudo ipvsadm

sudo apt install keepalived -y

注意：配置文件目錄/etc/keepalived/keepalived.conf，默認並無配置文件，須要手動建立。

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

}

打開ip forward功能：文件/etc/sysctl.conf

打開後修改裏面「net.ipv4.ip_forward = 1」

執行以下命令使設置生效：

sysctl -p

接下來開啓keepalived服務：LVS MASTER. LVS SLAVE都要操做以下：55.13 55.14

sudo systemctl start keepalived.service

查看keepalived進程：

[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查看虛擬ip是否加上：注意若是虛擬ip沒有自動加上，請重啓下keepalived服務。虛擬ip :55.102(自定義)

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

上述顯示55.102虛擬ip加上了！

接下里配置部署兩臺web服務器:

配置部署10.211.55.15 web1:

配置虛擬IP啓動腳本:

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

啓動tomcat服務：

sudo systemctl start tomcat7.service

爲了測試負載均衡，咱們將這個頁面改下，以更好的標識這個網頁是本服務器的

Tomcat7安裝目錄位於/usr/share/tomcat7，因此咱們要編輯tomcat下的webapps/ROOT/index.html這個文件。

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

/usr/share/tomcat7-root/default_root

刪掉此目錄的index.html文件：sudo rm -f index.html

從新建立此目錄的index.html文件，內容以下：

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

啓動虛擬IP的腳本：

sudo sh realserver.sh start

去LVS_MASTER服務器的終端查看下ipvsadm，查看WEB1(55.15)服務器加到集羣裏:

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

上述可見：55.15已經加進來了！

此時咱們訪問網頁http://10.211.55.15:8080，出現界面顯示web1 10.211.55.15；或者使用命令行測試轉發狀況均可以查看。

配置部署10.211.55.16 web2:

配置虛擬IP啓動腳本:

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

啓動tomcat服務：

sudo systemctl start tomcat7.service

爲了測試負載均衡，咱們將這個頁面改下，以更好的標識這個網頁是本服務器的

Tomcat7安裝目錄位於/usr/share/tomcat7，因此咱們要編輯tomcat下的webapps/ROOT/index.html這個文件。

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

/usr/share/tomcat7-root/default_root

刪掉此目錄的index.html文件：sudo rm -f index.html

從新建立此目錄的index.html文件，內容以下：

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

啓動虛擬IP的腳本：

sudo sh realserver.sh start

去LVS_MASTER服務器的終端查看下ipvsadm，查看WEB2服務器加到集羣裏:

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 55.16兩臺web都已經加進來了

最後客戶端測試：

瀏覽器輸入：vip地址即10.211.55.102:8080

停掉其中一臺keepalived，服務正常訪問!