LVS DR模式搭建
1.準備工作
- DR模式同樣需要三台虛拟機,三台機器隻需要有“公網”IP,但在這種模式下又多了一個VIP。
排程器dir:172.16.111.100
真實伺服器rs1:172.16.111.110
真實伺服器rs2:172.16.111.120
VIP:172.16.111.200
2.DR模式搭建
在dir機器上寫入腳本
[root@garytao-01 ~]# vim /usr/local/sbin/lvs_dr.sh
增加如下腳本内容:
#! /bin/bash
echo 1 > /proc/sys/net/ipv4/ip_forward
ipv=/usr/sbin/ipvsadm
vip=172.16.111.200
rs1=172.16.111.110
rs2=172.16.111.120
#注意這裡的網卡名字
ifdown ens33 #為了不讓網卡設定多次
ifup ens33
ifconfig ens33:2 $vip broadcast $vip netmask 255.255.255.255 up
route add -host $vip dev ens33:2
$ipv -C
$ipv -A -t $vip:80 -s rr
$ipv -a -t $vip:80 -r $rs1:80 -g -w 1
$ipv -a -t $vip:80 -r $rs2:80 -g -w 1
#啟動腳本
[root@garytao-01 ~]# sh /usr/local/sbin/lvs_dr.sh
成功斷開裝置 'ens33'。
成功激活的連接配接(D-Bus 激活路徑:/org/freedesktop/NetworkManager/ActiveConnection/2)
在rs1與rs2上編寫同樣腳本
[root@garytao-02 ~]# vim /usr/local/sbin/lvs_rs.sh
增加如下腳本内容:
#/bin/bash
vip=172.16.111.200
#把vip綁定在lo上,是為了實作rs直接把結果傳回給用戶端
ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up
route add -host $vip lo:0
#以下操作為更改arp核心參數,目的是為了讓rs順利發送mac位址給用戶端
#參考文檔www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.html
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
#啟動腳本
[root@garytao-02 ~]# sh /usr/local/sbin/lvs_rs.sh
#在檢視機器上檢視路由及IP
[root@garytao-02 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.16.111.2 0.0.0.0 UG 100 0 0 ens33
172.16.0.0 0.0.0.0 255.255.0.0 U 100 0 0 ens33
172.16.111.200 0.0.0.0 255.255.255.255 UH 0 0 0 lo
[root@garytao-02 ~]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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
inet 172.16.111.200/32 brd 172.16.111.200 scope global lo:0
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:2c:5f:75 brd ff:ff:ff:ff:ff:ff
inet 172.16.111.110/16 brd 172.16.255.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::b6dc:6aed:f1d0:2f43/64 scope link
valid_lft forever preferred_lft forever
[root@garytao-03 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.16.111.2 0.0.0.0 UG 100 0 0 ens33
172.16.111.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
172.16.111.200 0.0.0.0 255.255.255.255 UH 0 0 0 lo
[root@garytao-03 ~]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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
inet 172.16.111.200/32 brd 172.16.111.200 scope global lo:0
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:84:9e:21 brd ff:ff:ff:ff:ff:ff
inet 172.16.111.120/24 brd 172.16.111.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::5a44:6d44:2313:b46f/64 scope link
valid_lft forever preferred_lft forever
3.浏覽器通路測試
- 浏覽器裡通路172.16.111.200,通路第一次的時候要等一段時間再重新整理,有緩存。
keepalived + LVS
- keepalived内置了ipvsadm的功能,是以不需要再安裝ipvsadm包,也不用編寫和執行那個lvs_dir的腳本。
- 準備三台機器分别為:
2.配置dir機器上的keepalived配置檔案
[root@garytao-01 ~]# vim /etc/keepalived/keepalived.conf
删除之前的配置,增加如下配置内容:
vrrp_instance VI_1 {
#備用伺服器上為 BACKUP
state MASTER
#綁定vip的網卡為ens33,你的網卡和阿銘的可能不一樣,這裡需要你改一下
interface ens33
virtual_router_id 51
#備用伺服器上為90
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass aminglinux
}
virtual_ipaddress {
172.16.111.200
}
}
virtual_server 172.16.111.200 80 {
#(每隔10秒查詢realserver狀态)
delay_loop 10
#(lvs 算法)
lb_algo wlc
#(DR模式)
lb_kind DR
#(同一IP的連接配接60秒内被配置設定到同一台realserver)
persistence_timeout 60
#(用TCP協定檢查realserver狀态)
protocol TCP
real_server 172.16.111.110 80 {
#(權重)
weight 100
TCP_CHECK {
#(10秒無響應逾時)
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 172.16.111.120 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
#由于之前執行過LVS的腳本,可能需要做以下操作:
#把之前的ipvsadm規則清空
[root@garytao-01 ~]# ipvsadm -C
#把之前設定的VIP删除掉
[root@garytao-01 ~]# systemctl restart network
#在keepalived的配置檔案中定義的LVS模式為DR模式,是以需要在兩台rs上執行lvs_dr_rr.sh腳本,在上一節設定的腳本。
[root@garytao-01 ~]# sh /usr/local/sbin/lvs_dr_rs.ch
#啟動keepalived
[root@garytao-01 ~]# systemctl start keepalived
[root@garytao-01 ~]# ps aux |grep keep
root 5753 0.0 0.1 120720 1396 ? Ss 19:05 0:00 /usr/sbin/keepalived -D
root 5754 0.0 0.3 122916 3124 ? S 19:05 0:00 /usr/sbin/keepalived -D
root 5755 0.0 0.2 127116 2660 ? S 19:05 0:00 /usr/sbin/keepalived -D
root 5760 0.0 0.0 112680 972 pts/0 R+ 19:06 0:00 grep --color=auto keep
[root@garytao-01 ~]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:09:e5:58 brd ff:ff:ff:ff:ff:ff
inet 172.16.111.100/16 brd 172.16.255.255 scope global ens33
valid_lft forever preferred_lft forever
inet 172.16.111.200/32 brd 172.16.111.200 scope global ens33:2
valid_lft forever preferred_lft forever
inet6 fe80::1ffb:cde1:5f3e:5778/64 scope link
valid_lft forever preferred_lft forever
3: ens38: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:09:e5:6c brd ff:ff:ff:ff:ff:ff
inet 172.16.13.129/24 brd 172.16.13.255 scope global dynamic ens38
valid_lft 1486sec preferred_lft 1486sec
inet6 fe80::1392:1882:3d3d:ad8c/64 scope link
valid_lft forever preferred_lft forever
#使用執行指令ipvsadm -ln測試檢視連接配接數
#停掉120上的nginx後,使用ipvsadm -ln檢視如下
[root@garytao-03 ~]# systemctl stop nginx
[root@garytao-03 ~]# ps aux |grep nginx
root 7020 0.0 0.0 112680 976 pts/0 R+ 19:29 0:00 grep --color=auto nginx
[root@garytao-01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.16.111.200:80 wlc persistent 60
-> 172.16.111.110:80 Route 100 0 0
#關掉keepalived,
[root@garytao-01 ~]# systemctl stop keepalived
[root@garytao-01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
#開啟120上的nginx及keepalived後
[root@garytao-03 ~]# systemctl start nginx
[root@garytao-03 ~]# ps aux |grep nginx
root 7032 0.0 0.0 20500 624 ? Ss 19:32 0:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nobody 7033 0.0 0.3 22944 3208 ? S 19:32 0:00 nginx: worker process
nobody 7034 0.0 0.3 22944 3208 ? S 19:32 0:00 nginx: worker process
root 7036 0.0 0.0 112680 972 pts/0 S+ 19:32 0:00 grep --color=auto nginx
[root@garytao-01 ~]# systemctl start keepalived #dir機器
[root@garytao-01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.16.111.200:80 wlc persistent 60
-> 172.16.111.110:80 Route 100 0 0
-> 172.16.111.120:80 Route 100 0 0