配置keepalived实现Nginx高可用（单主、双主模式）
一、前置条件：
(1).Http作为后端web服务器：192.168.88.130:80 test.field.com
[[email protected]]# cat /var/www/html/index.html
<h1>Welcometo Http on test.field.com!!</h1>
<p>If yousee this page,test ok. </p>
<p><em>Thankyou!</em></p>
(2).Http作为后端web服务器：192.168.88.129:80 web2.field.com
[root@web2 ~]#cat /var/www/html/index.html
<h1>Welcometo Http on web2.field.com!!</h1>
<p>If yousee this page,test ok. </p>
<p><em>Thankyou!</em></p>
(3).nginx作为负载均衡服务器：192.168.88.130:8080 test.field.com
Nginx配置：实现简单负载均衡
Fascgi配置部分可直接删除
[root@testnginx]# vi nginx.conf
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user[$time_local] "$request" $http_host '
'$status $body_bytes_sent"$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
# proxy_cache_path /cache/nginx/ levels=1:2keys_zone=mycache:32m;
fastcgi_cache_path /cache/fastcgi/levels=1:1 keys_zone=fcgicache:10m inactive=3m max_size=1g;
upstream upservers {
server 192.168.88.129 weight=1;
server 192.168.88.130 weight=1;
}
sendfile on;
#tcp_nopush on;
keepalive_timeout 65;
#gzip on;
include /etc/nginx/conf.d/*.conf;
}
[root@test conf.d]#vi default.conf
server {
listen 8080;
server_name localhost;
add_header X-Via $server_addr;
add_header X-Cache$upstream_cache_status;
#charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main;
location / {
proxy_pass http://upservers/;
}
location /field/ {
# proxy_cache mycache;
# proxy_cache_valid 200 1d;
# proxy_cache_valid 301 302 10m;
# proxy_cache_valid any 1m;
# proxy_cache_use_stale error http_500http_502 http_503 http_504;
proxy_pass http://upservers/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For$proxy_add_x_forwarded_for;
}
location ~* \.(jpg|png|gif)$ {
# proxy_cache mycache;
# proxy_cache_valid 200 1d;
# proxy_cache_valid 301 302 10m;
# proxy_cache_valid any 1m;
# proxy_cache_use_stale error http_500 http_502 http_503 http_504;
proxy_pass http://upservers;
proxy_set_header X-Real-IP $remote_addr;
}
#error_page 404 /404.html;
# redirect server error pages to the staticpage /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
# proxy the PHP scripts to Apache listeningon 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI serverlistening on 127.0.0.1:9000
#
location ~ \.php$ {
# fastcgi_cache off;
#开关fastcgi_cache
fastcgi_cache fcgicache;
#fastcgi_cache：定义使用哪个缓存空间
fastcgi_cache_key $host$request_uri;
#fastcgi_cache_key：定义fastcgi_cache的key，该例中以请求的URI作为缓存的key，Nginx会取这个key的md5作为缓存文件，如果设置了缓存哈希目录，Nginx会从后往前取相应的位数做为目录
fastcgi_cache_min_uses 1;
#fastcgi_cache_min_uses：URL经过多少次请求将被缓存
fastcgi_cache_use_stale error timeout invalid_header http_500;
#fastcgi_cache_use_stale：定义哪些情况下可以使用过期缓存
fastcgi_cache_valid 200 10m;
#fastcgi_cache_valid：定义哪些http头要使用缓存
fastcgi_cache_valid 302 3m;
fastcgi_cache_valid any 1m;
root /usr/share/nginx/html;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
include fastcgi_params;
}
# deny access to .htaccess files, ifApache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
(4).nginx作为负载均衡服务器：192.168.88.131:8080 www.field.com
Nginx配置：实现简单负载均衡
[root@wwwnginx]# vi nginx.conf
upstream upservers {
server 192.168.88.129 weight=1;
server 192.168.88.130 weight=1;
}
[root@wwwnginx]#
[[email protected]]# vi default.conf
location / {
proxy_pass http://upservers/;
}
二、配置keepalived实现Nginx高可用
案例1、配置keepalived实现Nginx高可用
[root@testkeepalived]# service keepalived stop;ssh www 'service keepalived stop'
停止 keepalived：[确定]
停止 keepalived：[确定]
[root@testkeepalived]# service keepalived status;ssh www 'service keepalived status'
keepalived 已停
keepalived 已停
scp到129web服务器，实现免密ssh
[root@test ~]#scp -p .ssh/id_rsa .ssh/authorized_keys web2:/root/.ssh
root@web2'spassword:
id_rsa 100% 1675 1.6KB/s 00:00
authorized_keys 100% 401 0.4KB/s 00:00
[root@test ~]#ssh web2
Last login: SunApr 22 23:45:43 2018 from test.field.com
编辑简单通知脚本
[root@testkeepalived]# vi notify.sh
#!/bin/bash
# Author:MageEdu <[email protected]>
# description:An example of notify script
#
vip=192.168.88.80
contact='root@localhost'
notify() {
mailsubject="`hostname` to be $1: $vipfloating"
mailbody="`date '+%F %H:%M:%S'`: vrrptransition, `hostname` changed to be $1"
echo $mailbody | mail -s"$mailsubject" $contact
}
case"$1" in
master)
notify master
exit 0
;;
backup)
notify backup
exit 0
;;
fault)
notify fault
exit 0
;;
*)
echo 'Usage: `basename $0`{master|backup|fault}'
exit 1
;;
esac
[root@testkeepalived]# ll
总用量 24
-rw-r--r-- 1root root 4564 4月 23 00:05 keepalived.conf
-rw-r--r-- 1root root 3562 4月 22 16:23 keepalived.conf.backup
-rw-r--r-- 1root root 4212 4月 22 23:59 keepalived.conf.backup01
-rw-r--r-- 1root root 619 4月 2300:08 notify.sh
注意修改脚本权限，否则无法下发邮件
[root@test keepalived]# chmod +xnotify.sh
[root@test keepalived]#vi keepalived.conf
! ConfigurationFile for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id test.field.com
vrrp_mcast_group4 224.18.0.200
}
vrrp_scriptchk_maintanance {
script "[[ -f /etc/keepalived/down]] && exit 1 || exit 0"
interval 1
#interval多长时间检查一次
#如果失败返回1权重-2
weight -2
}
vrrp_script chk_nginx {
script "killall -0 nginx &>/dev/null"
interval 1
#interval多长时间检查一次
#如果失败返回1权重-2
weight -5
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 4e78bb3a
}
virtual_ipaddress {
192.168.88.80/16 dev eth0 label eth0:0
}
track_script {
#track_script 调用脚本
chk_nginx
}
notify_master"/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.shbackup"
notify_fault"/etc/keepalived/notify.sh fault"
}
[root@test keepalived]# scpnotify.sh www:/etc/keepalived/
notify.sh 100% 619 0.6KB/s 00:00
[root@test keepalived]# scpkeepalived.conf www:/etc/keepalived/
keepalived.conf
修改备机配置文件 100% 4564 4.5KB/s 00:00
[root@wwwkeepalived]# vi keepalived.conf
! ConfigurationFile for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from root@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id www.field.com
vrrp_mcast_group4 224.18.0.200
}
vrrp_scriptchk_maintanance {
script "[[ -f /etc/keepalived/down]] && exit 1 || exit 0"
interval 1
#interval多长时间检查一次
#如果失败返回1权重-2
weight -2
}
vrrp_scriptchk_nginx {
script "killall -0 nginx &>/dev/null"
interval 1
#interval多长时间检查一次
#如果失败返回1权重-2
weight -5
}
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 4e78bb3a
}
virtual_ipaddress {
192.168.88.80/16 dev eth1label eth1:0
}
track_script {
#track_script 调用脚本
chk_nginx
}
notify_master "/etc/keepalived/notify.shmaster"
notify_backup"/etc/keepalived/notify.sh backup"
notify_fault"/etc/keepalived/notify.sh fault"
}
[root@testkeepalived]# service keepalived start;ssh www 'service keepalived start'
正在启动 keepalived：[确定]
正在启动 keepalived：[确定]
[root@testkeepalived]# service keepalived start;ssh www 'service keepalived start'
正在启动 keepalived：[确定]
正在启动 keepalived：[确定]
[root@testkeepalived]# mail
Heirloom Mailversion 12.4 7/29/08. Type ? for help.
"/var/spool/mail/root":20 messages 1 new 14 unread
......
>N 20root Mon Apr 2323:08 18/687 "test.field.com to be master:192.168.88.80 floating"
& 20
Message 20:
From [email protected] Mon Apr 23 23:08:19 2018
Return-Path: <[email protected]>
X-Original-To: root@localhost
Delivered-To: [email protected]
Date: Mon, 23 Apr 2018 23:08:14 +0800
Subject: test.field.com to be master: 192.168.88.80 floating
User-Agent: Heirloom mailx 12.4 7/29/08
Content-Type: text/plain; charset=us-ascii
From: [email protected] (root)
Status: R
2018-04-2323:08:13: vrrp transition, test.field.com changed to be master
& q
Held 20 messagesin /var/spool/mail/root
You have mail in/var/spool/mail/root
[root@testkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
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:29:4c:04:cc brdff:ff:ff:ff:ff:ff
inet 192.168.88.130/24 brd 192.168.88.255scope global eth0
inet 192.168.88.80/16 scope global eth0:0
inet6 fe80::20c:29ff:fe4c:4cc/64 scope link
valid_lft forever preferred_lft forever
[root@test ~]#tail -f /var/log/keepalived.log
Apr 23 23:08:11test Keepalived[3853]: Starting Keepalived v1.2.13 (03/19,2015)
Apr 23 23:08:11test Keepalived_healthcheckers[3855]: Initializing ipvs 2.6
Apr 23 23:08:11test Keepalived[3854]: Starting Healthcheck child process, pid=3855
Apr 23 23:08:11test Keepalived[3854]: Starting VRRP child process, pid=3856
Apr 23 23:08:11test Keepalived_vrrp[3856]: Netlink reflector reports IP 192.168.88.130 added
Apr 23 23:08:11test Keepalived_vrrp[3856]: Netlink reflector reports IPfe80::20c:29ff:fe4c:4cc added
Apr 23 23:08:11test Keepalived_vrrp[3856]: Registering Kernel netlink reflector
Apr 23 23:08:11test Keepalived_vrrp[3856]: Registering Kernel netlink command channel
Apr 23 23:08:11test Keepalived_vrrp[3856]: Registering gratuitous ARP shared channel
Apr 23 23:08:11test Keepalived_vrrp[3856]: Opening file '/etc/keepalived/keepalived.conf'.
Apr 23 23:08:11test Keepalived_vrrp[3856]: Configuration is using : 66502 Bytes
Apr 23 23:08:11test Keepalived_vrrp[3856]: Using LinkWatch kernel netlink reflector...
Apr 23 23:08:11test Keepalived_vrrp[3856]: VRRP sockpool: [ifindex(2), proto(112), unicast(0),fd(10,11)]
Apr 23 23:08:11test Keepalived_vrrp[3856]: VRRP_Script(chk_nginx) succeeded
Apr 23 23:08:12test Keepalived_vrrp[3856]: VRRP_Instance(VI_1) Transition to MASTER STATE
Apr 23 23:08:12test Keepalived_healthcheckers[3855]: Netlink reflector reports IP 192.168.88.130added
Apr 23 23:08:12test Keepalived_healthcheckers[3855]: Netlink reflector reports IPfe80::20c:29ff:fe4c:4cc added
Apr 23 23:08:12test Keepalived_healthcheckers[3855]: Registering Kernel netlink reflector
Apr 23 23:08:12test Keepalived_healthcheckers[3855]: Registering Kernel netlink commandchannel
Apr 23 23:08:12test Keepalived_healthcheckers[3855]: Opening file'/etc/keepalived/keepalived.conf'.
Apr 23 23:08:12test Keepalived_healthcheckers[3855]: Configuration is using : 7610 Bytes
Apr 23 23:08:13test Keepalived_healthcheckers[3855]: Using LinkWatch kernel netlinkreflector...
Apr 23 23:08:13test Keepalived_vrrp[3856]: VRRP_Instance(VI_1) Entering MASTER STATE
Apr 23 23:08:13test Keepalived_vrrp[3856]: VRRP_Instance(VI_1) setting protocol VIPs.
Apr 23 23:08:13test Keepalived_vrrp[3856]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0for 192.168.88.80
Apr 23 23:08:13test Keepalived_vrrp[3856]: Opening script file /etc/keepalived/notify.sh
Apr 23 23:08:13test Keepalived_healthcheckers[3855]: Netlink reflector reports IP192.168.88.80 added
Apr 23 23:08:18test Keepalived_vrrp[3856]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0for 192.168.88.80
www节点：作为backup节点，不分配VIP
[root@wwwkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen1000
link/ether 00:0c:29:e3:90:19 brdff:ff:ff:ff:ff:ff
inet 192.168.88.131/24 brd 192.168.88.255scope global eth1
inet6 fe80::20c:29ff:fee3:9019/64 scopelink
valid_lft forever preferred_lft forever
[root@www ~]#tail -f /var/log/keepalived.log
Apr 23 23:08:16www Keepalived[3638]: Starting Keepalived v1.2.13 (03/19,2015)
Apr 23 23:08:16www Keepalived[3640]: Starting Healthcheck child process, pid=3641
Apr 23 23:08:16www Keepalived_healthcheckers[3641]: Initializing ipvs 2.6
Apr 23 23:08:16www Keepalived[3640]: Starting VRRP child process, pid=3642
Apr 23 23:08:16www Keepalived_vrrp[3642]: Netlink reflector reports IP 192.168.88.131 added
Apr 23 23:08:16www Keepalived_vrrp[3642]: Netlink reflector reports IPfe80::20c:29ff:fee3:9019 added
Apr 23 23:08:16www Keepalived_vrrp[3642]: Registering Kernel netlink reflector
Apr 23 23:08:16www Keepalived_vrrp[3642]: Registering Kernel netlink command channel
Apr 23 23:08:16www Keepalived_vrrp[3642]: Registering gratuitous ARP shared channel
Apr 23 23:08:16www Keepalived_vrrp[3642]: Opening file '/etc/keepalived/keepalived.conf'.
Apr 23 23:08:16www Keepalived_vrrp[3642]: Configuration is using : 66486 Bytes
Apr 23 23:08:16www Keepalived_vrrp[3642]: Using LinkWatch kernel netlink reflector...
Apr 23 23:08:16www Keepalived_vrrp[3642]: VRRP_Instance(VI_1) Entering BACKUP STATE
Apr 23 23:08:16www Keepalived_vrrp[3642]: Opening script file /etc/keepalived/notify.sh
Apr 23 23:08:16www Keepalived_vrrp[3642]: VRRP sockpool: [ifindex(2), proto(112), unicast(0),fd(10,11)]
Apr 23 23:08:17www Keepalived_vrrp[3642]: VRRP_Script(chk_nginx) succeeded
Apr 23 23:08:18www Keepalived_healthcheckers[3641]: Netlink reflector reports IP192.168.88.131 added
Apr 23 23:08:18www Keepalived_healthcheckers[3641]: Netlink reflector reports IPfe80::20c:29ff:fee3:9019 added
Apr 23 23:08:18www Keepalived_healthcheckers[3641]: Registering Kernel netlink reflector
Apr 23 23:08:18www Keepalived_healthcheckers[3641]: Registering Kernel netlink command channel
Apr 23 23:08:18www Keepalived_healthcheckers[3641]: Opening file'/etc/keepalived/keepalived.conf'.
Apr 23 23:08:18www Keepalived_healthcheckers[3641]: Configuration is using : 7594 Bytes
Apr 23 23:08:19www Keepalived_healthcheckers[3641]: Using LinkWatch kernel netlinkreflector...
测试1：主备机Nginx均正常
.Windows7访问http://192.168.88.80:8080/
页面在【Welcome to Http on web2.field.com!!】和【Welcome to Http on test2.field.com!!】之间跳转
.test机用curl访问http://192.168.88.80:8080/，会依次连接192.168.88.129:80和192.168.88.130:80
[root@testkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on web2.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@testkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on test.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@testkeepalived]#
测试2、关闭test机nginx服务
[root@testkeepalived]# service nginx stop
停止 nginx：[确定]
[root@test keepalived]#ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
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 qlen1000
link/ether 00:0c:29:4c:04:cc brdff:ff:ff:ff:ff:ff
inet 192.168.88.130/24 brd 192.168.88.255scope global eth0
inet6fe80::20c:29ff:fe4c:4cc/64 scope link
valid_lft forever preferred_lft forever
You have newmail in /var/spool/mail/root
观察主节点IP可以发现，master节点： Netlink reflector reports IP 192.168.88.80removed
[root@test ~]#tail -f /var/log/keepalived.log
Apr 23 23:32:53 test Keepalived_vrrp[3856]:VRRP_Script(chk_nginx) failed
Apr 23 23:32:55 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) Received higher prio advert
Apr 23 23:32:55 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) Entering BACKUP STATE
Apr 23 23:32:55 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) removing protocol VIPs.
Apr 23 23:32:55 test Keepalived_vrrp[3856]: Opening scriptfile /etc/keepalived/notify.sh
Apr 23 23:32:55 test Keepalived_healthcheckers[3855]: Netlinkreflector reports IP 192.168.88.80 removed
www节点，主节点关闭Nginx，VIP流转到backup节点
[root@wwwkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen1000
link/ether 00:0c:29:e3:90:19 brdff:ff:ff:ff:ff:ff
inet 192.168.88.131/24 brd 192.168.88.255scope global eth1
inet192.168.88.80/16 scope global eth1:0
inet6 fe80::20c:29ff:fee3:9019/64 scopelink
valid_lft forever preferred_lft forever
观察备节点IP可以发现，VIP流转到backup节点：Netlink reflector reports IP 192.168.88.80added
[root@www ~]#tail -f /var/log/keepalived.log
Apr 23 23:32:55 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) forcing a new MASTER election
Apr 23 23:32:55 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) forcing a new MASTER election
Apr 23 23:32:56 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) Transition to MASTER STATE
Apr 23 23:32:57 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) Entering MASTER STATE
Apr 23 23:32:57 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) setting protocol VIPs.
Apr 23 23:32:57 www Keepalived_healthcheckers[3641]: Netlinkreflector reports IP 192.168.88.80 added
Apr 23 23:32:57 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.88.80
Apr 23 23:32:57 www Keepalived_vrrp[3642]: Opening script file/etc/keepalived/notify.sh
Apr 23 23:33:02 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.88.80
测试网页访问：
.Windows7访问http://192.168.88.80:8080/
页面在【Welcome to Http on web2.field.com!!】和【Welcome to Http on test2.field.com!!】之间跳转
.test机用curl访问http://192.168.88.80:8080/，会依次连接192.168.88.129:80和192.168.88.130:80
[root@testkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on test.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@testkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on web2.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@testkeepalived]#
测试3、重启nginx，主节点抢占回vip
[root@testkeepalived]# service nginx start
正在启动 nginx：[确定]
[root@testkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
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 qlen1000
link/ether 00:0c:29:4c:04:cc brdff:ff:ff:ff:ff:ff
inet 192.168.88.130/24 brd 192.168.88.255scope global eth0
inet 192.168.88.80/16 scope global eth0:0
inet6 fe80::20c:29ff:fe4c:4cc/64 scope link
valid_lft forever preferred_lft forever
You have newmail in /var/spool/mail/root
[root@test keepalived]# mail
Heirloom Mailversion 12.4 7/29/08. Type ? for help.
N 22 root Mon Apr 23 23:37 18/687 "test.field.com to be master: 192.168.88.80 floating"
& 22
Message 22:
From [email protected] Mon Apr 23 23:37:31 2018
Return-Path: <[email protected]>
X-Original-To: root@localhost
Delivered-To: [email protected]
Date: Mon, 23 Apr 2018 23:37:31 +0800
Subject: test.field.com to be master: 192.168.88.80 floating
User-Agent: Heirloom mailx 12.4 7/29/08
Content-Type: text/plain; charset=us-ascii
From: [email protected] (root)
Status: R
2018-04-2323:37:31: vrrp transition, test.field.com changed to be master
& q
Held 22 messagesin /var/spool/mail/root
观察主节点IP可以发现，master抢回VIP：Netlink reflector reports IP 192.168.88.80 added
[root@test ~]#tail -f /var/log/keepalived.log
Apr 23 23:37:28 test Keepalived_vrrp[3856]:VRRP_Script(chk_nginx) succeeded
Apr 23 23:37:29 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) forcing a new MASTER election
Apr 23 23:37:29 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) forcing a new MASTER election
Apr 23 23:37:30 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) Transition to MASTER STATE
Apr 23 23:37:31 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) Entering MASTER STATE
Apr 23 23:37:31 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) setting protocol VIPs.
Apr 23 23:37:31 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.88.80
Apr 23 23:37:31 test Keepalived_vrrp[3856]: Opening scriptfile /etc/keepalived/notify.sh
Apr 23 23:37:31 test Keepalived_healthcheckers[3855]: Netlinkreflector reports IP 192.168.88.80 added
Apr 23 23:37:36 test Keepalived_vrrp[3856]:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.88.80
www节点：master节点启动Nginx，backup节点VIP移除
[root@wwwkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen1000
link/ether 00:0c:29:e3:90:19 brdff:ff:ff:ff:ff:ff
inet 192.168.88.131/24 brd 192.168.88.255scope global eth1
inet6 fe80::20c:29ff:fee3:9019/64 scopelink
valid_lft forever preferred_lft forever
You have newmail in /var/spool/mail/root
观察backup节点可以发现，VIP移除：Netlink reflector reports IP 192.168.88.80 removed
[root@www ~]#tail -f /var/log/keepalived.log
Apr 23 23:37:29 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) Received higher prio advert
Apr 23 23:37:29 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) Entering BACKUP STATE
Apr 23 23:37:29 www Keepalived_vrrp[3642]:VRRP_Instance(VI_1) removing protocol VIPs.
Apr 23 23:37:29 www Keepalived_vrrp[3642]: Opening scriptfile /etc/keepalived/notify.sh
Apr 23 23:37:29 www Keepalived_healthcheckers[3641]: Netlinkreflector reports IP 192.168.88.80 removed
三、keepalived实现nginx高可用的双主模型
案例2、配置keepalived实现nginx高可用的双主模型
说明：其基本实现思想为创建两个虚拟路由器，并以两个节点互为主从。
（1）、www节点，编辑keepalived.conf，添加虚拟路由实例VI_2
[root@wwwkeepalived]# vi keepalived.conf
vrrp_instance VI_2 {
state MASTER
interface eth1
virtual_router_id 61
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass Te7UYb3a
}
virtual_ipaddress {
192.168.88.90/16 dev eth1 label eth1:1
}
track_script {
#track_script 调用脚本
chk_nginx
}
notify_master"/etc/keepalived/notify.sh master"
notify_backup"/etc/keepalived/notify.sh backup"
notify_fault"/etc/keepalived/notify.sh fault"
}
（2）、test节点，编辑keepalived.conf，添加虚拟路由实例VI_2
[root@testkeepalived]# vi keepalived.conf
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 61
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass Te7UYb3a
}
virtual_ipaddress {
192.168.88.90/16 dev eth0 label eth0:1
}
track_script {
#track_script 调用脚本
chk_nginx
}
notify_master"/etc/keepalived/notify.sh master"
notify_backup"/etc/keepalived/notify.sh backup"
notify_fault"/etc/keepalived/notify.sh fault"
}
[root@testkeepalived]# service keepalived restart;ssh www 'service keepalived restart'
停止 keepalived：[确定]
正在启动 keepalived：[确定]
停止 keepalived：[确定]
正在启动 keepalived：[确定]
test节点：在虚拟路由实例VI_1中作为master，占有VI_1的VIP：192.168.88.80
[root@testkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
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 qlen1000
link/ether 00:0c:29:4c:04:cc brdff:ff:ff:ff:ff:ff
inet 192.168.88.130/24 brd 192.168.88.255scope global eth0
inet192.168.88.80/16 scope global eth0:0
inet6 fe80::20c:29ff:fe4c:4cc/64 scope link
valid_lft forever preferred_lft forever
[root@testkeepalived]# mail
Heirloom Mailversion 12.4 7/29/08. Type ? for help.
"/var/spool/mail/root":27 messages 3 new 19 unread
N 27 root Mon Apr 23 23:51 18/687 "test.field.com to be master: 192.168.88.80 floating"
& 27
Message 27:
From [email protected] Mon Apr 23 23:51:18 2018
Return-Path: <[email protected]>
X-Original-To: root@localhost
Delivered-To: [email protected]
Date: Mon, 23 Apr 2018 23:51:18 +0800
Subject: test.field.com to be master: 192.168.88.80 floating
User-Agent: Heirloom mailx 12.4 7/29/08
Content-Type: text/plain; charset=us-ascii
From: [email protected] (root)
Status: R
2018-04-2323:51:18: vrrp transition, test.field.com changed to be master
& q
Held 27 messagesin /var/spool/mail/root
You have mail in/var/spool/mail/root
[root@test ~]#tail -f /var/log/keepalived.log
Apr 23 23:51:16test Keepalived[11946]: Stopping Keepalived v1.2.13 (03/19,2015)
Apr 23 23:51:16test Keepalived_vrrp[11948]: VRRP_Instance(VI_1) sending 0 priority
Apr 23 23:51:16test Keepalived_vrrp[11948]: VRRP_Instance(VI_1) removing protocol VIPs.
Apr 23 23:51:16test Keepalived_healthcheckers[11947]: Netlink reflector reports IP192.168.88.80 removed
Apr 23 23:51:16test Keepalived[12478]: Starting Keepalived v1.2.13 (03/19,2015)
Apr 23 23:51:16test Keepalived[12479]: Starting Healthcheck child process, pid=12480
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Initializing ipvs 2.6
Apr 23 23:51:16test Keepalived[12479]: Starting VRRP child process, pid=12481
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Netlink reflector reports IP192.168.88.130 added
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Netlink reflector reports IPfe80::20c:29ff:fe4c:4cc added
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Registering Kernel netlink reflector
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Registering Kernel netlink commandchannel
Apr 23 23:51:16test Keepalived_vrrp[12481]: Netlink reflector reports IP 192.168.88.130 added
Apr 23 23:51:16test Keepalived_vrrp[12481]: Netlink reflector reports IPfe80::20c:29ff:fe4c:4cc added
Apr 23 23:51:16test Keepalived_vrrp[12481]: Registering Kernel netlink reflector
Apr 23 23:51:16test Keepalived_vrrp[12481]: Registering Kernel netlink command channel
Apr 23 23:51:16test Keepalived_vrrp[12481]: Registering gratuitous ARP shared channel
Apr 23 23:51:16test Keepalived_vrrp[12481]: Opening file '/etc/keepalived/keepalived.conf'.
Apr 23 23:51:16test Keepalived_vrrp[12481]: Configuration is using : 71723 Bytes
Apr 23 23:51:16test Keepalived_vrrp[12481]: Using LinkWatch kernel netlink reflector...
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Opening file'/etc/keepalived/keepalived.conf'.
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Configuration is using : 7940 Bytes
Apr 23 23:51:16test Keepalived_healthcheckers[12480]: Using LinkWatch kernel netlinkreflector...
Apr 23 23:51:16test Keepalived_vrrp[12481]: VRRP_Instance(VI_2) Entering BACKUP STATE
Apr 23 23:51:16test Keepalived_vrrp[12481]: Opening script file /etc/keepalived/notify.sh
Apr 23 23:51:16test Keepalived_vrrp[12481]: VRRP sockpool: [ifindex(2), proto(112),unicast(0), fd(10,11)]
Apr 23 23:51:16test Keepalived_vrrp[12481]: VRRP_Script(chk_nginx) succeeded
Apr 23 23:51:17test Keepalived_vrrp[12481]: VRRP_Instance(VI_2) Transition to MASTER STATE
Apr 23 23:51:17test Keepalived_vrrp[12481]: VRRP_Instance(VI_2) Received higher prio advert
Apr 23 23:51:17test Keepalived_vrrp[12481]: VRRP_Instance(VI_2) Entering BACKUP STATE
Apr 23 23:51:17test Keepalived_vrrp[12481]: Opening script file /etc/keepalived/notify.sh
Apr 23 23:51:17test Keepalived_vrrp[12481]: VRRP_Instance(VI_1) Transition to MASTER STATE
Apr 23 23:51:18test Keepalived_vrrp[12481]: VRRP_Instance(VI_1) Entering MASTER STATE
Apr 23 23:51:18test Keepalived_vrrp[12481]: VRRP_Instance(VI_1) setting protocol VIPs.
Apr 23 23:51:18test Keepalived_healthcheckers[12480]: Netlink reflector reports IP192.168.88.80 added
Apr 23 23:51:18test Keepalived_vrrp[12481]: VRRP_Instance(VI_1) Sending gratuitous ARPs oneth0 for 192.168.88.80
Apr 23 23:51:18test Keepalived_vrrp[12481]: Opening script file /etc/keepalived/notify.sh
Apr 23 23:51:23test Keepalived_vrrp[12481]: VRRP_Instance(VI_1) Sending gratuitous ARPs oneth0 for 192.168.88.80
www节点：在虚拟路由实例VI_2中作为master，占有VI_2的VIP：192.168.88.90
[root@wwwkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen1000
link/ether 00:0c:29:e3:90:19 brdff:ff:ff:ff:ff:ff
inet 192.168.88.131/24 brd 192.168.88.255scope global eth1
inet192.168.88.90/16 scope global eth1:1
inet6 fe80::20c:29ff:fee3:9019/64 scopelink
valid_lft forever preferred_lft forever
You have newmail in /var/spool/mail/root
[root@wwwkeepalived]# mail
Heirloom Mailversion 12.4 7/29/08. Type ? for help.
"/var/spool/mail/root":50 messages 4 new 42 unread
N 50 root Mon Apr 23 23:51 18/680 "www.field.com to be master: 192.168.88.90 floating"
& 50
Message 50:
From [email protected] Mon Apr 23 23:51:18 2018
Return-Path: <[email protected]>
X-Original-To: root@localhost
Delivered-To: [email protected]
Date: Mon, 23 Apr 2018 23:51:18 +0800
Subject: www.field.com to be master: 192.168.88.90 floating
User-Agent: Heirloom mailx 12.4 7/29/08
Content-Type: text/plain; charset=us-ascii
From: [email protected] (root)
Status: R
2018-04-2323:51:18: vrrp transition, www.field.com changed to be master
& q
Held 50 messagesin /var/spool/mail/root
[root@www ~]# tail -f /var/log/keepalived.log
Apr 23 23:51:16www Keepalived_vrrp[11512]: VRRP_Instance(VI_2) sending 0 priority
Apr 23 23:51:16www Keepalived[11510]: Stopping Keepalived v1.2.13 (03/19,2015)
Apr 23 23:51:16www Keepalived_vrrp[11512]: VRRP_Instance(VI_2) removing protocol VIPs.
Apr 23 23:51:16www Keepalived[12042]: Starting Keepalived v1.2.13 (03/19,2015)
Apr 23 23:51:16www Keepalived[12043]: Starting Healthcheck child process, pid=12044
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Initializing ipvs 2.6
Apr 23 23:51:16www Keepalived[12043]: Starting VRRP child process, pid=12045
Apr 23 23:51:16www Keepalived_vrrp[12045]: Netlink reflector reports IP 192.168.88.131 added
Apr 23 23:51:16www Keepalived_vrrp[12045]: Netlink reflector reports IPfe80::20c:29ff:fee3:9019 added
Apr 23 23:51:16www Keepalived_vrrp[12045]: Registering Kernel netlink reflector
Apr 23 23:51:16www Keepalived_vrrp[12045]: Registering Kernel netlink command channel
Apr 23 23:51:16www Keepalived_vrrp[12045]: Registering gratuitous ARP shared channel
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Netlink reflector reports IP192.168.88.131 added
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Netlink reflector reports IPfe80::20c:29ff:fee3:9019 added
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Registering Kernel netlink reflector
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Registering Kernel netlink commandchannel
Apr 23 23:51:16www Keepalived_vrrp[12045]: Opening file '/etc/keepalived/keepalived.conf'.
Apr 23 23:51:16www Keepalived_vrrp[12045]: Configuration is using : 71709 Bytes
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Opening file '/etc/keepalived/keepalived.conf'.
Apr 23 23:51:16www Keepalived_vrrp[12045]: Using LinkWatch kernel netlink reflector...
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Configuration is using : 7926 Bytes
Apr 23 23:51:16www Keepalived_healthcheckers[12044]: Using LinkWatch kernel netlinkreflector...
Apr 23 23:51:16www Keepalived_vrrp[12045]: VRRP_Instance(VI_1) Entering BACKUP STATE
Apr 23 23:51:16www Keepalived_vrrp[12045]: Opening script file /etc/keepalived/notify.sh
Apr 23 23:51:16www Keepalived_vrrp[12045]: VRRP sockpool: [ifindex(2), proto(112), unicast(0),fd(10,11)]
Apr 23 23:51:17www Keepalived_vrrp[12045]: VRRP_Script(chk_nginx) succeeded
Apr 23 23:51:17www Keepalived_vrrp[12045]: VRRP_Instance(VI_2) Transition to MASTER STATE
Apr 23 23:51:17www Keepalived_vrrp[12045]: VRRP_Instance(VI_2) Received lower prio advert,forcing new election
Apr 23 23:51:18www Keepalived_vrrp[12045]: VRRP_Instance(VI_2) Entering MASTER STATE
Apr 23 23:51:18www Keepalived_vrrp[12045]: VRRP_Instance(VI_2) setting protocol VIPs.
Apr 23 23:51:18www Keepalived_healthcheckers[12044]: Netlink reflector reports IP192.168.88.90 added
Apr 23 23:51:18www Keepalived_vrrp[12045]: VRRP_Instance(VI_2) Sending gratuitous ARPs on eth1for 192.168.88.90
Apr 23 23:51:18www Keepalived_vrrp[12045]: Opening script file /etc/keepalived/notify.sh
Apr 23 23:51:23www Keepalived_vrrp[12045]: VRRP_Instance(VI_2) Sending gratuitous ARPs on eth1for 192.168.88.90
测试1：主备机nginx均正常
.Windows7访问http://192.168.88.80:8080/和 http://192.168.88.90:8080/
页面在【Welcome to Http on web2.field.com!!】和【Welcome to Http on test2.field.com!!】之间跳转
.www机用curl访问http://192.168.88.80:8080/，会依次连接192.168.88.129:80和192.168.88.130:80
[root@testkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on web2.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@testkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on test.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@test keepalived]#curl http://192.168.88.90:8080/
<h1>Welcome to Http on web2.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@testkeepalived]# curl http://192.168.88.90:8080/
<h1>Welcome to Http on test.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@testkeepalived]#
测试2、一台机关闭nginx，访问两个虚拟IP地址，仍能正常访问。
[root@wwwkeepalived]# service nginx stop
停止 nginx：[确定]
[root@wwwkeepalived]# mail
>N 51root Mon Apr 2323:55 18/680 "www.field.com to be backup:192.168.88.90 floating"
& 51
Message 51:
From [email protected] Mon Apr 23 23:55:47 2018
Return-Path: <[email protected]>
X-Original-To: root@localhost
Delivered-To: [email protected]
Date: Mon, 23 Apr 2018 23:55:47 +0800
Subject: www.field.com to be backup: 192.168.88.90 floating
User-Agent: Heirloom mailx 12.4 7/29/08
Content-Type: text/plain; charset=us-ascii
From: [email protected] (root)
Status: R
2018-04-2323:55:47: vrrp transition, www.field.com changed to be backup
& q
Held 51 messagesin /var/spool/mail/root
[root@www keepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1:<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen1000
link/ether 00:0c:29:e3:90:19 brdff:ff:ff:ff:ff:ff
inet 192.168.88.131/24 brd 192.168.88.255scope global eth1
inet6 fe80::20c:29ff:fee3:9019/64 scopelink
valid_lft forever preferred_lft forever
[root@www ~]# tail -f /var/log/keepalived.log
Apr 23 23:55:46 www Keepalived_vrrp[12045]:VRRP_Script(chk_nginx) failed
Apr 23 23:55:47 www Keepalived_vrrp[12045]:VRRP_Instance(VI_2) Received higher prio advert
Apr 23 23:55:47 www Keepalived_vrrp[12045]:VRRP_Instance(VI_2) Entering BACKUP STATE
Apr 23 23:55:47 www Keepalived_vrrp[12045]:VRRP_Instance(VI_2) removing protocol VIPs.
Apr 23 23:55:47 www Keepalived_vrrp[12045]: Opening scriptfile /etc/keepalived/notify.sh
Apr 23 23:55:47 www Keepalived_healthcheckers[12044]: Netlinkreflector reports IP 192.168.88.90 removed
test节点：www节点关闭Nginx，VIP192.168.88.80会流转到该主机backup节点
[root@testkeepalived]# ip addr list
1: lo:<LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
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 qlen1000
link/ether 00:0c:29:4c:04:cc brdff:ff:ff:ff:ff:ff
inet 192.168.88.130/24 brd 192.168.88.255scope global eth0
inet192.168.88.80/16 scope global eth0:0
inet192.168.88.90/16 scope global secondary eth0:1
inet6 fe80::20c:29ff:fe4c:4cc/64 scope link
valid_lft forever preferred_lft forever
[root@testkeepalived]# mail
>N 28root Mon Apr 2323:55 18/687 "test.field.com to be master:192.168.88.80 floating"
& 28
Message 28:
From [email protected] Mon Apr 23 23:55:49 2018
Return-Path: <[email protected]>
X-Original-To: root@localhost
Delivered-To: [email protected]
Date: Mon, 23 Apr 2018 23:55:49 +0800
Subject: test.field.com to be master: 192.168.88.90 floating
User-Agent: Heirloom mailx 12.4 7/29/08
Content-Type: text/plain; charset=us-ascii
From: [email protected] (root)
Status: R
2018-04-2323:55:49: vrrp transition, test.field.com changed to be master
& q
Held 28 messagesin /var/spool/mail/root
[root@test ~]#tail -f /var/log/keepalived.log
Apr 23 23:55:47 test Keepalived_vrrp[12481]:VRRP_Instance(VI_2) forcing a new MASTER election
Apr 23 23:55:47 test Keepalived_vrrp[12481]:VRRP_Instance(VI_2) forcing a new MASTER election
Apr 23 23:55:48 test Keepalived_vrrp[12481]:VRRP_Instance(VI_2) Transition to MASTER STATE
Apr 23 23:55:49 test Keepalived_vrrp[12481]:VRRP_Instance(VI_2) Entering MASTER STATE
Apr 23 23:55:49 test Keepalived_vrrp[12481]:VRRP_Instance(VI_2) setting protocol VIPs.
Apr 23 23:55:49 test Keepalived_vrrp[12481]:VRRP_Instance(VI_2) Sending gratuitous ARPs on eth0 for 192.168.88.90
Apr 23 23:55:49 test Keepalived_healthcheckers[12480]:Netlink reflector reports IP 192.168.88.90 added
Apr 23 23:55:49 test Keepalived_vrrp[12481]: Opening scriptfile /etc/keepalived/notify.sh
Apr 23 23:55:54 test Keepalived_vrrp[12481]:VRRP_Instance(VI_2) Sending gratuitous ARPs on eth0 for 192.168.88.90
.Windows7访问http://192.168.88.80:8080/和 http://192.168.88.90:8080/
页面在【Welcome to Http on web2.field.com!!】和【Welcome to Http on test2.field.com!!】之间跳转
.www机用curl访问http://192.168.88.80:8080/，和http://192.168.88.90:8080/
会依次连接192.168.88.129:80和192.168.88.130:80
[root@wwwkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on test.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@wwwkeepalived]# curl http://192.168.88.80:8080/
<h1>Welcome to Http on web2.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@wwwkeepalived]# curl http://192.168.88.90:8080/
<h1>Welcome to Http on test.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>
[root@wwwkeepalived]# curl http://192.168.88.90:8080/
<h1>Welcome to Http on web2.field.com!!</h1>
<p>If you see this page,test ok. </p>
<p><em>Thank you!</em></p>