LVS 之搭建

部署LVS

10.0.0.20

[root@node1 ~]# yum -y install ipvsadm

进入到 /usr/src 目录查看结果，如果有ip_vs_rr、ip_vs，表示正常 

[root@node1 ~]# cd /usr/src/
[root@node1 src]# lsmod|grep ip_vs
ip_vs 136798 0 
nf_conntrack 105702 1 ip_vs
libcrc32c 12644 2 xfs,ip_vs

如果没有显示加载一下，在此查看

[root@node1 src]# lsmod|grep ip_vs
[root@node1 src]# modprobe  ip_vs 
[root@node1 src]# lsmod|grep ip_vs
ip_vs                 136798  0 
nf_conntrack          105702  1 ip_vs
libcrc32c              12644  2 xfs,ip_vs

添加VIP（虚拟IP），虚拟IP需和实际IP为一个网段

[root@node1 ~]# ip addr add 10.0.0.28/24 dev eth0 label eth0:0

查看虚拟IP

[root@node1 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:29:39:b8 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.20/24 brd 10.0.0.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 10.0.0.28/24 scope global secondary eth0:0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe29:39b8/64 scope link 
       valid_lft forever preferred_lft forever

清空ipvsadm记录

[root@node1 ~]# ipvsadm -C

配置ipvs，并查看

[root@node1 ~]# ipvsadm -A -t 10.0.0.28:80 -s wrr
[root@node1 ~]# ipvsadm -a -t 10.0.0.28:80 -r 10.0.0.21:80 -g -w 1
[root@node1 ~]# ipvsadm -a -t 10.0.0.28:80 -r 10.0.0.22:80 -g -w 1
[root@node1 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.0.0.28:80 wrr
  -> 10.0.0.21:80                 Route   1      0          0         
  -> 10.0.0.22:80                 Route   1      0          0    

加入开机启动

[root@node1 ~]# systemctl enable ipvsadm

Web

绑定虚拟IP(VIP)

[root@node2 ~]# ip addr add 10.0.0.28/32 dev lo label lo:0  每台web都要执行

抑制VIP,防止LVS和RSVIP冲突

[root@node2 ~]# echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
[root@node2 ~]# echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
[root@node2 ~]# echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
[root@node2 ~]# echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce