lvs+http+centos7.3安装
准备工作
环境:
centos7.3 + ipvsadm1.2.1 + httpd+lvs地址规划:
DR server 虚拟网卡 VIP (Director Server)
centos128 ens33:0 192.168.44.77
RS server 网卡 IP 虚拟网卡 VIP (Real Server)
centos129 ens33 192.168.44.129 lo:0 192.168.44.77
centos130 ens33 192.168.44.130 lo:0 192.168.44.77安装软件：
yun -y install httpd ipvsadm*所有Director Server需要安装ipvsadm，
Real Server 只需要执行配置脚本.
- 创建一个连接文件，其命令为：
ln –sv /usr/src/kernels/3.10.0-514.21.1.el7.x86_64 /usr/src/linux注意一定要与当前的运行的内核相一致
检验安装ipvsadm是否被正确安装
1. 执行ipvsadm，输出如上表第二列底三行所示。
2. 检查当前加载的内核模块，看是否存在 ip_vs 模块
[root@localhost ~]# lsmod|grep ip_vs
[root@centos128 3.10.0-514.21.1.el7.x86_64]# lsmod|grep ip_vs
ip_vs 141092 0
nf_conntrack 111302 6 ip_vs,nf_nat,nf_nat_ipv4,xt_conntrack,nf_nat_masquerade_ipv4,nf_conntrack_ipv4
libcrc32c 12644 3 xfs,ip_vs,dm_persistent_data一、配置及验证Director Server
lvsDR.sh 脚本用于开启和关闭lvs服务
[root@centos128 ~]# cat lvsDR.sh
#!/bin/bash
VIP=192.168.44.77 #虚拟ip（供用户访问的ip）
RIP1=192.168.44.129 #真实服务器(real server)ip
RIP2=192.168.44.130 #真实服务器(real server)ip
PORT=80 #端口
case "$1" in
start)
echo "start config LVS Director Server..."
ifconfig ens33:0 $VIP broadcast $VIP netmask 255.255.255.255 up
route add -host $VIP dev ens33:0
echo "1">/proc/sys/net/ipv4/ip_forward
ipvsadm -C
#ipvsadm -A -t $VIP:$PORT -s rr 120
ipvsadm -A -t $VIP:$PORT -s rr -p 5
ipvsadm -a -t $VIP:$PORT -r $RIP2:$PORT -g -w 1 #添加real server，多个可配置多条
ipvsadm -a -t $VIP:$PORT -r $RIP1:$PORT -g -w 1 #添加real server，多个可配置多条
ipvsadm
echo "config LVS Director Server success!"
;;
stop)
echo "shut down LVS Director Server"
echo "0">/proc/sys/net/ipv4/ip_forward
ipvsadm -C
ifconfig ens33:0 down
echo "shut down LVS Director Server success!"
;;
*)
echo "usage:$0 {start|stop}"
exit 1
esac执行./lvsDR.sh ，查看执行完的状态
[root@centos128 ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
[root@centos128 ~]# ./lvsDR.sh
usage:./lvsDR.sh {start|stop}
[root@centos128 ~]# ./lvsDR.sh start
start config LVS Director Server...
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP centos128:http rr persistent 5
-> centos129:http Route 1 0 0
-> centos130:http Route 1 0 0
config LVS Director Server success!二、配置及验证Real Server
lvsRS.sh 此脚本配置Real Server
[root@centos129 ~]# cat lvsRS.sh
#!/bin/bash
VIP=192.168.44.77 #virtual ip ( for user acces)
case "$1" in
start)
echo "start config lvs Real Server..."
ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
route add -host $VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "config lvs Real Server success!"
;;
stop)
echo "shutting down lvs Real server..."
ifconfig lo:0 down
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "shut down lvs Real server success!"
;;
*)
echo "usage:$0 {start|stop}"
exit 1
esac查看网卡状态
[root@centos129 ~]# 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:e6:b5:68 brd ff:ff:ff:ff:ff:ff
inet 192.168.44.129/24 brd 192.168.44.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fee6:b568/64 scope link
valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 02:42:7e:42:92:ab brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 scope global docker0
valid_lft forever preferred_lft forever
[root@centos129 ~]# 运行脚本lvsRS.sh
[root@centos129 ~]# ./lvsRS.sh start
start config lvs Real Server...
config lvs Real Server success!
[root@centos129 ~]# 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 192.168.44.77/32 brd 192.168.44.77 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:e6:b5:68 brd ff:ff:ff:ff:ff:ff
inet 192.168.44.129/24 brd 192.168.44.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fee6:b568/64 scope link
valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 02:42:7e:42:92:ab brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 scope global docker0
valid_lft forever preferred_lft forever配置http
在RS server的centos129上配置http
[root@centos129 ~]# systemctl start httpd
[root@centos129 html]# cat /var/www/html/index.html
129在RS server的centos130上配置http
[root@centos130 ~]# systemctl start httpd
[root@centos130 html]# cat /var/www/html/index.html
130查看用ipvsadm -L -n
ipvsadm
IP Virtual Server version x.x.x (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
FWM 99 rr persistent 3600
第二总超时时间用ipvsadm –set tcp tcpfin udp设置，比如
ipvsadm –set 1 2 1
表示tcp空闲等待时间为120 秒
客户端关闭链接等待时间为20秒
udp空闲等待为100秒
测试如下
