Centos7-LVS叢集-NAT配置
1.準備環境。
1)克隆 四臺虛擬機器 pc10, lvs20, web30,web40.
分別設定好IP 192.168.4.10,192.168.4.20(192.168.2.20),192.168.2.30,192.168.2.40.
10位客戶機,20為轉發和排程機,需設定兩張網絡卡eth0和eth1,30和40為web伺服器。
2)每臺機器上的firewalld和selinux都關掉。
3)web30和40上都安裝httpd 並開啟服務:
#yum -y install httpd
#systemctl start httpd
4)lvs20上開啟IP轉發:
# vim /etc/sysctl.conf
將以下內容新增進去
#net.ipv4.ip_forward = 1
安裝ipvsadm:
#yum -y install ipvsadm
然後啟動ipvsadm
#systemctl start ipvsadm
如果啟動不成功可以執行以下命令:
#ipvsadm --save > /etc/sysconfig/ipvsadm
5)web30和web40上指定閘道器為192.168.2.20
route add default gw 192.168.2.20
pc10上指定閘道器為192.168.4.20
2. 配置ipvsadm
在lvs20上操作;
1)新增虛擬服務
[[email protected] ~]# ipvsadm -A -t 192.168.4.20:80 -s rr
[[email protected] ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.4.20:80 rr
2)新增 realserver web30&40
[[email protected] ~]# ipvsadm -a -t 192.168.4.20:80 -r 192.168.2.30:80 -m
[[email protected] ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.4.20:80 rr
-> 192.168.2.30:80 Masq 1 0 0
[[email protected] ~]# ipvsadm -a -t 192.168.4.20:80 -r 192.168.2.40:80 -m
[[email protected] ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.4.20:80 rr
-> 192.168.2.30:80 Masq 1 0 0
-> 192.168.2.40:80 Masq 1 0 0
3)儲存策略
[[email protected] ~]# ipvsadm-save
-A -t 192.168.4.20:http -s rr
-a -t 192.168.4.20:http -r 192.168.2.30:http -m -w 1
-a -t 192.168.4.20:http -r 192.168.2.40:http -m -w 1
3.測試 ,pc10上進行測試
安裝elinks
[[email protected] ~]# yum -y install elinks
使用elinks測試 lvs20分發效果
[[email protected] ~]# elinks --dump http://192.168.4.20/test.html
web40
[[email protected] ~]# elinks --dump http://192.168.4.20/test.html
web30
可以在分發機器上檢視連線資訊彙總
[[email protected] ~]# ipvsadm -Ln --stats
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Conns InPkts OutPkts InBytes OutBytes
-> RemoteAddress:Port
TCP 192.168.4.20:80 8 48 33 3800 4332
-> 192.168.2.30:80 4 24 17 1900 2192
-> 192.168.2.40:80 4 24 16 1900 2140
改權重值: -e -w
[[email protected] ~]# ipvsadm -e -t 192.168.4.20:80 -r 192.168.2.40:80 -w 3
[[email protected] ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.4.20:80 rr
-> 192.168.2.30:80 Masq 1 0 0
-> 192.168.2.40:80 Route 3 0 0
改排程演算法: -E -m NAT模式 -g DR模式 -i TUN模式
[[email protected] ~]# ipvsadm -E -t 192.168.4.20:80 -s wrr
刪除realserver: -d
[[email protected] ~]# ipvsadm -d -t 192.168.4.20:80 -r 192.168.2.30:80
[[email protected] ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.4.20:80 wrr
-> 192.168.2.40:80 Route 3 0 0
清空虛擬服務: -C
[[email protected] ~]# ipvsadm -C
[[email protected] ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn