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
nf_conntrack   ip_vs
libcrc32c   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
nf_conntrack             ip_vs
libcrc32c                 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/ dev eth0 label eth0:0

查看虚拟IP

[root@node1 ~]# ip addr
: lo: <LOOPBACK,UP,LOWER_UP> mtu  qdisc noqueue state UNKNOWN
    link/loopback ::::: brd :::::
    inet 127.0.0.1/ scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::/ scope host
       valid_lft forever preferred_lft forever
: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu  qdisc pfifo_fast state UP qlen
    link/ether :0c::::b8 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.20/ brd 10.0.0.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 10.0.0.28/ scope global secondary eth0:
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe29:39b8/ 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: -s wrr
[root@node1 ~]# ipvsadm -a -t 10.0.0.28: -r 10.0.0.21: -g -w
[root@node1 ~]# ipvsadm -a -t 10.0.0.28: -r 10.0.0.22: -g -w
[root@node1 ~]# ipvsadm -Ln
IP Virtual Server version 1.2. (size=)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.0.0.28: wrr
  -> 10.0.0.21:                 Route
  -> 10.0.0.22:                 Route                       

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