keepalived+Nginx实现主备保障Nginx的高可用。
1、什么是keepalived?
Keepalived是集群管理中保证集群高可用的一个服务软件，用来防止单点故障。
Keepalived的作用是检测web服务器的状态，如果有一台web服务器死机，或工作出现故障，Keepalived将检测到，并将有故障的web服务器从系统中剔除，当web服务器工作正常后Keepalived自动将web服务器加入到服务器群中，这些工作全部自动完成，不需要人工干涉，需要人工做的只是修复故障的web服务器。
2、keepalived工作原理。 keepalived是以VRRP协议为实现基础的，VRRP全称Virtual Router Redundancy Protocol，即虚拟路由冗余协议。 虚拟路由冗余协议，可以认为是实现路由器高可用的协议，即将N台提供相同功能的路由器组成一个路由器组，这个组里面有一个master和多个backup，master上面有一个对外提供服务的vip（VIP = Virtual IP Address，虚拟IP地址，该路由器所在局域网内其他机器的默认路由为该vip），master会发组播，当backup收不到VRRP包时就认为master宕掉了，这时就需要根据VRRP的优先级来选举一个backup当master。这样的话就可以保证路由器的高可用了。 keepalived主要有三个模块，分别是core、check和VRRP。core模块为keepalived的核心，负责主进程的启动、维护以及全局配置文件的加载和解析。check负责健康检查，包括常见的各种检查方式。VRRP模块是来实现VRRP协议的。
3、keepalived+nginx实现主备过程。
3.1、初始状态。
3.2、主机宕机状态。
3.3、主机恢复状态。
4、如何实现keepalived+Nginx高可用环境。
两台nginx，一主一备：192.168.110.142和192.168.110.140。两台tomcat服务器：192.168.110.142、192.168.110.140。
5、开始安装keepalived。
安装环境如何所示(切换到root用户哦)：
1 [root@localhost ~]# yum -y install kernel-devel*
2 [root@localhost ~]# yum -y install openssl-*
3 [root@localhost ~]# yum -y install popt-devel
4 [root@localhost ~]# yum -y install lrzsz
5 [root@localhost ~]# yum -y install openssh-clients
6 [root@localhost ~]# yum -y install libnl libnl-devel popt开始安装keepalived。解压缩如下所示：
1 [root@localhost ~]# ls
2 anaconda-ks.cfg Documents install.log Music Public Videos
3 Desktop Downloads install.log.syslog Pictures Templates zookeeper.out
4 [root@localhost ~]# cd /home/hadoop/package/
5 [root@localhost package]# ls
6 apache-activemq-5.12.0-bin.tar.gz IK Analyzer 2012FF_hf1 keepalived-1.2.15.tar.gz zookeeper-3.4.6.tar.gz
7 apache-activemq-5.12.0-bin.zip IK Analyzer 2012FF_hf1.rar nginx-1.8.0.tar.gz
8 apache-tomcat-7.0.47.tar.gz jdk-7u55-linux-i586.tar.gz solr-4.10.3.tgz.tgz
9 [root@localhost package]# tar -zxvf keepalived-1.2.15.tar.gz -C /home/hadoop/soft/执行配置命令如下所示：
1 [root@localhost soft]# ls
2 apache-activemq-5.12.0 apache-tomcat-7.0.47 jdk1.7.0_55 keepalived-1.2.15 nginx-1.8.0 solr-4.10.3 zookeeper-3.4.6
3 [root@localhost soft]# cd keepalived-1.2.15/
4 [root@localhost keepalived-1.2.15]# ls
5 AUTHOR bin ChangeLog configure configure.in CONTRIBUTORS COPYING doc genhash INSTALL install-sh keepalived keepalived.spec.in
6 [root@localhost keepalived-1.2.15]# ./configure --prefix=/usr/local/keepalived然后进行安装操作和编译操作。如下所示：
1 [root@localhost keepalived-1.2.15]# make
2 [root@localhost keepalived-1.2.15]# make install至此安装成功。
拷贝执行文件。操作如下所示：
1 [root@localhost keepalived-1.2.15]# cd /usr/local/
2 [root@localhost local]# ls
3 bin etc games include keepalived lib libexec nginx sbin share solr solr-cloud src tomcat
4 [root@localhost local]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/将init.d文件拷贝到etc下,加入开机启动项。
1 [root@localhost local]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived将keepalived文件拷贝到etc下，加入网卡配置。
1 [root@localhost local]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/创建keepalived文件夹。
1 [root@localhost local]# mkdir -p /etc/keepalived将keepalived配置文件拷贝到etc下。
1 [root@localhost local]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf添加可执行权限。
[root@localhost local]# chmod +x /etc/init.d/keepalived
[root@localhost local]# ll /etc/init.d/keepalived
-rwxr-xr-x. 1 root root 1308 Oct 1 19:16 /etc/init.d/keepalived加入开机启动。
1 [root@localhost local]# chkconfig --add keepalived #添加时必须保证/etc/init.d/keepalived存在.
2 [root@localhost local]# chkconfig keepalived on
3 [root@localhost local]# chkconfig --list #添加完可查询系统服务是否存在.
4 NetworkManager 0:off 1:off 2:on 3:on 4:on 5:on 6:off
5 abrt-ccpp 0:off 1:off 2:off 3:on 4:off 5:on 6:off
6 abrtd 0:off 1:off 2:off 3:on 4:off 5:on 6:off
7 acpid 0:off 1:off 2:on 3:on 4:on 5:on 6:off
8 atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
9 auditd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
10 blk-availability 0:off 1:on 2:on 3:on 4:on 5:on 6:off
11 bluetooth 0:off 1:off 2:off 3:on 4:on 5:on 6:off
12 cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off
13 crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
14 cups 0:off 1:off 2:on 3:on 4:on 5:on 6:off
15 dnsmasq 0:off 1:off 2:off 3:off 4:off 5:off 6:off
16 firstboot 0:off 1:off 2:off 3:on 4:off 5:on 6:off
17 haldaemon 0:off 1:off 2:off 3:on 4:on 5:on 6:off
18 htcacheclean 0:off 1:off 2:off 3:off 4:off 5:off 6:off
19 httpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
20 ip6tables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
21 iptables 0:off 1:off 2:off 3:off 4:off 5:off 6:off
22 irqbalance 0:off 1:off 2:off 3:on 4:on 5:on 6:off
23 kdump 0:off 1:off 2:off 3:on 4:on 5:on 6:off
24 keepalived 0:off 1:off 2:on 3:on 4:on 5:on 6:off
25 lvm2-monitor 0:off 1:on 2:on 3:on 4:on 5:on 6:off
26 mdmonitor 0:off 1:off 2:on 3:on 4:on 5:on 6:off
27 messagebus 0:off 1:off 2:on 3:on 4:on 5:on 6:off
28 netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
29 netfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
30 network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
31 ntpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
32 ntpdate 0:off 1:off 2:off 3:off 4:off 5:off 6:off
33 portreserve 0:off 1:off 2:on 3:on 4:on 5:on 6:off
34 postfix 0:off 1:off 2:on 3:on 4:on 5:on 6:off
35 psacct 0:off 1:off 2:off 3:off 4:off 5:off 6:off
36 quota_nld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
37 rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off
38 restorecond 0:off 1:off 2:off 3:off 4:off 5:off 6:off
39 rngd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
40 rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
41 saslauthd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
42 smartd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
43 snmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
44 snmptrapd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
45 spice-vdagentd 0:off 1:off 2:off 3:off 4:off 5:on 6:off
46 sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
47 sysstat 0:off 1:on 2:on 3:on 4:on 5:on 6:off
48 udev-post 0:off 1:on 2:on 3:on 4:on 5:on 6:off
49 vmware-tools 0:off 1:off 2:on 3:on 4:on 5:on 6:off
50 vmware-tools-thinprint 0:off 1:off 2:on 3:on 4:on 5:on 6:off
51 wdaemon 0:off 1:off 2:off 3:off 4:off 5:off 6:off
52 winbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off
53 wpa_supplicant 0:off 1:off 2:off 3:off 4:off 5:off 6:off
54 [root@localhost local]# 启动keepalived 启动：service keepalived start 停止：service keepalived stop 重启：service keepalived restart
1 [root@localhost local]# service keepalived start
2 Starting keepalived: [ OK ]
3 [root@localhost local]# service keepalived stop
4 Stopping keepalived: [ OK ]
5 [root@localhost local]# service keepalived restart
6 Stopping keepalived: [FAILED]
7 Starting keepalived: [ OK ]
8 [root@localhost local]#6、配置日志文件。
将keepalived日志输出到local0：
[root@localhost ~]# vim /etc/sysconfig/keepalived
1 KEEPALIVED_OPTIONS="-D -d -S 0"在/etc/rsyslog.conf里添加（找一空白行直接添加到里面即可）:
1 [root@localhost ~]# vim /etc/rsyslog.conf
2 # save keepalived.log
3 local0.* /var/log/keepalived.log重新启动keepalived和rsyslog服务：
1 [root@localhost ~]# service rsyslog restart
2 Shutting down system logger: [ OK ]
3 Starting system logger: [ OK ]
4 [root@localhost ~]# service keepalived restart
5 Stopping keepalived: [ OK ]
6 Starting keepalived: [ OK ]
7 [root@localhost ~]#打开防火墙的通讯地址。
1 [root@localhost ~]# 2 [root@localhost ~]# iptables -A INPUT -d 224.0.0.18 -j ACCEPT
3 [root@localhost ~]# /etc/rc.d/init.d/iptables save
4 iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]
5 [root@localhost ~]#至此，一台机器的keepalived全部安装完成，另外一台按照上面安装即可，Nginx之前配过，自己安装一下即可。如果两台机器的Nginx和Keepalived都安装好了呢，接着开始下面的操作。
7、配置keepalived。
现在开始修改主nginx的配置。修改主nginx下/etc/keepalived/keepalived.conf文件。
默认配置如下所示：
1 ! Configuration File for keepalived
2
3 # 全局配置。
4 global_defs {
5 notification_email {
6 # 指定keepalived在发生切换时需要发送email到的对象，一行一个。
7 acassen@firewall.loc
8 failover@firewall.loc
9 sysadmin@firewall.loc
10 }
11 notification_email_from Alexandre.Cassen@firewall.loc # 指定发件人
12 smtp_server 192.168.200.1 # 指定smtp服务器地址
13 smtp_connect_timeout 30 # 指定smtp连接超时时间
14 router_id LVS_DEVEL # 运行keepalived机器的一个标识
15 }
16
17 vrrp_instance VI_1 {
18 state MASTER # 标示状态为MASTER 备份机为BACKUP
19 interface eth0 # 设置实例绑定的网卡
20 virtual_router_id 51 # 同一实例下virtual_router_id必须相同
21 priority 100 # MASTER权重要高于BACKUP,比如BACKUP为99
22 advert_int 1 # MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
23 authentication { # 设置认证
24 auth_type PASS # 主从服务器验证方式
25 auth_pass 1111
26 }
27 virtual_ipaddress { # 设置vip
28 192.168.200.16 # 可以多个虚拟IP，换行即可
29 192.168.200.17
30 192.168.200.18
31 }
32 }
33
34 virtual_server 192.168.200.100 443 {
35 delay_loop 6
36 lb_algo rr
37 lb_kind NAT
38 nat_mask 255.255.255.0
39 persistence_timeout 50
40 protocol TCP
41
42 real_server 192.168.201.100 443 {
43 weight 1
44 SSL_GET {
45 url {
46 path /
47 digest ff20ad2481f97b1754ef3e12ecd3a9cc
48 }
49 url {
50 path /mrtg/
51 digest 9b3a0c85a887a256d6939da88aabd8cd
52 }
53 connect_timeout 3
54 nb_get_retry 3
55 delay_before_retry 3
56 }
57 }
58 }
59
60 virtual_server 10.10.10.2 1358 {
61 delay_loop 6
62 lb_algo rr
63 lb_kind NAT
64 persistence_timeout 50
65 protocol TCP
66
67 sorry_server 192.168.200.200 1358
68
69 real_server 192.168.200.2 1358 {
70 weight 1
71 HTTP_GET {
72 url {
73 path /testurl/test.jsp
74 digest 640205b7b0fc66c1ea91c463fac6334d
75 }
76 url {
77 path /testurl2/test.jsp
78 digest 640205b7b0fc66c1ea91c463fac6334d
79 }
80 url {
81 path /testurl3/test.jsp
82 digest 640205b7b0fc66c1ea91c463fac6334d
83 }
84 connect_timeout 3
85 nb_get_retry 3
86 delay_before_retry 3
87 }
88 }
89
90 real_server 192.168.200.3 1358 {
91 weight 1
92 HTTP_GET {
93 url {
94 path /testurl/test.jsp
95 digest 640205b7b0fc66c1ea91c463fac6334c
96 }
97 url {
98 path /testurl2/test.jsp
99 digest 640205b7b0fc66c1ea91c463fac6334c
100 }
101 connect_timeout 3
102 nb_get_retry 3
103 delay_before_retry 3
104 }
105 }
106 }
107
108 virtual_server 10.10.10.3 1358 {
109 delay_loop 3
110 lb_algo rr
111 lb_kind NAT
112 nat_mask 255.255.255.0
113 persistence_timeout 50
114 protocol TCP
115
116 real_server 192.168.200.4 1358 {
117 weight 1
118 HTTP_GET {
119 url {
120 path /testurl/test.jsp
121 digest 640205b7b0fc66c1ea91c463fac6334d
122 }
123 url {
124 path /testurl2/test.jsp
125 digest 640205b7b0fc66c1ea91c463fac6334d
126 }
127 url {
128 path /testurl3/test.jsp
129 digest 640205b7b0fc66c1ea91c463fac6334d
130 }
131 connect_timeout 3
132 nb_get_retry 3
133 delay_before_retry 3
134 }
135 }
136
137 real_server 192.168.200.5 1358 {
138 weight 1
139 HTTP_GET {
140 url {
141 path /testurl/test.jsp
142 digest 640205b7b0fc66c1ea91c463fac6334d
143 }
144 url {
145 path /testurl2/test.jsp
146 digest 640205b7b0fc66c1ea91c463fac6334d
147 }
148 url {
149 path /testurl3/test.jsp
150 digest 640205b7b0fc66c1ea91c463fac6334d
151 }
152 connect_timeout 3
153 nb_get_retry 3
154 delay_before_retry 3
155 }
156 }
157 }主机的Nginx配置如下所示，主机的Keepalived配置如下所示：
分别在主机和备份机加上一个虚拟主机的。主机的配置如下所示：记得拷贝html目录，名称重命名为html-hhh。
1 server {
2 listen 192.168.110.142:80; # 相同的端口号80
3 server_name www.hhh.com;
4
5 location / {
6 root html-hhh; # http://www.baidu.com/访问的是这个目录html-baidu下面的index.html，没有index.html就访问index.htm。如果都咩有就访问错误页面
7 index index.html index.htm;
8 }
9 # redirect server error pages to the static page /50x.html
10 error_page 500 502 503 504 /50x.html;
11 location = /50x.html {
12 root html-hhh;
13 }
14
15 } 1 ! Configuration File for keepalived
2
3 global_defs {
4 notification_email { # 指定keepalived在发生切换时需要发送email到的对象，一行一个
5 1748741328@qq.com
6 # acassen@firewall.loc
7 # failover@firewall.loc
8 # sysadmin@firewall.loc
9 }
10 notification_email_from Alexandre.Cassen@firewall.loc # 指定发件人
11 # smtp_server 192.168.200.1 # 指定smtp服务器地址
12 smtp_server 192.168.110.2
13 smtp_connect_timeout 30 # 指定smtp连接超时时间
14 router_id LVS_DEVEL # 运行keepalived机器的一个标识
15 }
16
17 vrrp_instance VI_1 {
18 state MASTER # 标示状态为MASTER 备份机为BACKUP
19 interface eth0 # 设置实例绑定的网卡
20 virtual_router_id 51 # 同一实例下virtual_router_id必须相同
21 priority 100 # MASTER权重要高于BACKUP 比如BACKUP为99
22 advert_int 1 # MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
23 authentication { # 设置认证
24 auth_type PASS # 主从服务器验证方式
25 # auth_pass 1111
26 auth_pass 8888
27 }
28 virtual_ipaddress { # 设置vip
29 192.168.110.100 # 可以多个虚拟IP，换行即可
30 # 192.168.200.16
31 # 192.168.200.17
32 # 192.168.200.18
33 }
34 }
35
36 virtual_server 192.168.200.100 443 {
37 delay_loop 6
38 lb_algo rr
39 lb_kind NAT
40 nat_mask 255.255.255.0
41 persistence_timeout 50
42 protocol TCP
43
44 real_server 192.168.201.100 443 {
45 weight 1
46 SSL_GET {
47 url {
48 path /
49 digest ff20ad2481f97b1754ef3e12ecd3a9cc
50 }
51 url {
52 path /mrtg/
53 digest 9b3a0c85a887a256d6939da88aabd8cd
54 }
55 connect_timeout 3
56 nb_get_retry 3
57 delay_before_retry 3
58 }
59 }
60 }
61
62 virtual_server 10.10.10.2 1358 {
63 delay_loop 6
64 lb_algo rr
65 lb_kind NAT
66 persistence_timeout 50
67 protocol TCP
68
69 sorry_server 192.168.200.200 1358
70
71 real_server 192.168.200.2 1358 {
72 weight 1
73 HTTP_GET {
74 url {
75 path /testurl/test.jsp
76 digest 640205b7b0fc66c1ea91c463fac6334d
77 }
78 url {
79 path /testurl2/test.jsp
80 digest 640205b7b0fc66c1ea91c463fac6334d
81 }
82 url {
83 path /testurl3/test.jsp
84 digest 640205b7b0fc66c1ea91c463fac6334d
85 }
86 connect_timeout 3
87 nb_get_retry 3
88 delay_before_retry 3
89 }
90 }
91
92 real_server 192.168.200.3 1358 {
93 weight 1
94 HTTP_GET {
95 url {
96 path /testurl/test.jsp
97 digest 640205b7b0fc66c1ea91c463fac6334c
98 }
99 url {
100 path /testurl2/test.jsp
101 digest 640205b7b0fc66c1ea91c463fac6334c
102 }
103 connect_timeout 3
104 nb_get_retry 3
105 delay_before_retry 3
106 }
107 }
108 }
109
110 virtual_server 10.10.10.3 1358 {
111 delay_loop 3
112 lb_algo rr
113 lb_kind NAT
114 nat_mask 255.255.255.0
115 persistence_timeout 50
116 protocol TCP
117
118 real_server 192.168.200.4 1358 {
119 weight 1
120 HTTP_GET {
121 url {
122 path /testurl/test.jsp
123 digest 640205b7b0fc66c1ea91c463fac6334d
124 }
125 url {
126 path /testurl2/test.jsp
127 digest 640205b7b0fc66c1ea91c463fac6334d
128 }
129 url {
130 path /testurl3/test.jsp
131 digest 640205b7b0fc66c1ea91c463fac6334d
132 }
133 connect_timeout 3
134 nb_get_retry 3
135 delay_before_retry 3
136 }
137 }
138
139 real_server 192.168.200.5 1358 {
140 weight 1
141 HTTP_GET {
142 url {
143 path /testurl/test.jsp
144 digest 640205b7b0fc66c1ea91c463fac6334d
145 }
146 url {
147 path /testurl2/test.jsp
148 digest 640205b7b0fc66c1ea91c463fac6334d
149 }
150 url {
151 path /testurl3/test.jsp
152 digest 640205b7b0fc66c1ea91c463fac6334d
153 }
154 connect_timeout 3
155 nb_get_retry 3
156 delay_before_retry 3
157 }
158 }
159 }备份机的Nginx配置和Keepalived配置如下所示：
修改备nginx下/etc/keepalived/keepalived.conf文件 配置备nginx时需要注意：需要修改state为BACKUP , priority比MASTER低，virtual_router_id和master的值一致。
1 server {
2 listen 192.168.110.140:80; # 相同的端口号80
3 server_name www.hhh.com;
4
5 location / {
6 root html-hhh; # http://www.baidu.com/访问的是这个目录html-baidu下面的index.html，没有index.html就访问index.htm。如果都咩有就访问错误页面
7 index index.html index.htm;
8 }
9 # redirect server error pages to the static page /50x.html
10 error_page 500 502 503 504 /50x.html;
11 location = /50x.html {
12 root html-hhh;
13 }
14
15 } 1 ! Configuration File for keepalived
2
3 global_defs {
4 notification_email { # 指定keepalived在发生切换时需要发送email到的对象，一行一个
5 1748741328@qq.com
6 # acassen@firewall.loc
7 # failover@firewall.loc
8 # sysadmin@firewall.loc
9 }
10 notification_email_from Alexandre.Cassen@firewall.loc # 指定发件人
11 # smtp_server 192.168.200.1 # 指定smtp服务器地址
12 smtp_server 192.168.110.2
13 smtp_connect_timeout 30 # 指定smtp连接超时时间
14 router_id LVS_DEVEL # 运行keepalived机器的一个标识
15 }
16
17 vrrp_instance VI_1 {
18 state BACKUP # 标示状态,备份机为BACKUP
19 interface eth0 # 设置实例绑定的网卡
20 virtual_router_id 51 # 同一实例下virtual_router_id必须相同
21 priority 99 # MASTER权重要高于BACKUP 比如BACKUP为99
22 advert_int 1 # MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
23 authentication { # 设置认证
24 auth_type PASS # 主从服务器验证方式
25 # auth_pass 1111
26 auth_pass 8888
27 }
28 virtual_ipaddress { # 设置vip
29 192.168.110.100 # 可以多个虚拟IP，换行即可
30 # 192.168.200.16
31 # 192.168.200.17
32 # 192.168.200.18
33 }
34 }
35
36 virtual_server 192.168.200.100 443 {
37 delay_loop 6
38 lb_algo rr
39 lb_kind NAT
40 nat_mask 255.255.255.0
41 persistence_timeout 50
42 protocol TCP
43
44 real_server 192.168.201.100 443 {
45 weight 1
46 SSL_GET {
47 url {
48 path /
49 digest ff20ad2481f97b1754ef3e12ecd3a9cc
50 }
51 url {
52 path /mrtg/
53 digest 9b3a0c85a887a256d6939da88aabd8cd
54 }
55 connect_timeout 3
56 nb_get_retry 3
57 delay_before_retry 3
58 }
59 }
60 }
61
62 virtual_server 10.10.10.2 1358 {
63 delay_loop 6
64 lb_algo rr
65 lb_kind NAT
66 persistence_timeout 50
67 protocol TCP
68
69 sorry_server 192.168.200.200 1358
70
71 real_server 192.168.200.2 1358 {
72 weight 1
73 HTTP_GET {
74 url {
75 path /testurl/test.jsp
76 digest 640205b7b0fc66c1ea91c463fac6334d
77 }
78 url {
79 path /testurl2/test.jsp
80 digest 640205b7b0fc66c1ea91c463fac6334d
81 }
82 url {
83 path /testurl3/test.jsp
84 digest 640205b7b0fc66c1ea91c463fac6334d
85 }
86 connect_timeout 3
87 nb_get_retry 3
88 delay_before_retry 3
89 }
90 }
91
92 real_server 192.168.200.3 1358 {
93 weight 1
94 HTTP_GET {
95 url {
96 path /testurl/test.jsp
97 digest 640205b7b0fc66c1ea91c463fac6334c
98 }
99 url {
100 path /testurl2/test.jsp
101 digest 640205b7b0fc66c1ea91c463fac6334c
102 }
103 connect_timeout 3
104 nb_get_retry 3
105 delay_before_retry 3
106 }
107 }
108 }
109
110 virtual_server 10.10.10.3 1358 {
111 delay_loop 3
112 lb_algo rr
113 lb_kind NAT
114 nat_mask 255.255.255.0
115 persistence_timeout 50
116 protocol TCP
117
118 real_server 192.168.200.4 1358 {
119 weight 1
120 HTTP_GET {
121 url {
122 path /testurl/test.jsp
123 digest 640205b7b0fc66c1ea91c463fac6334d
124 }
125 url {
126 path /testurl2/test.jsp
127 digest 640205b7b0fc66c1ea91c463fac6334d
128 }
129 url {
130 path /testurl3/test.jsp
131 digest 640205b7b0fc66c1ea91c463fac6334d
132 }
133 connect_timeout 3
134 nb_get_retry 3
135 delay_before_retry 3
136 }
137 }
138
139 real_server 192.168.200.5 1358 {
140 weight 1
141 HTTP_GET {
142 url {
143 path /testurl/test.jsp
144 digest 640205b7b0fc66c1ea91c463fac6334d
145 }
146 url {
147 path /testurl2/test.jsp
148 digest 640205b7b0fc66c1ea91c463fac6334d
149 }
150 url {
151 path /testurl3/test.jsp
152 digest 640205b7b0fc66c1ea91c463fac6334d
153 }
154 connect_timeout 3
155 nb_get_retry 3
156 delay_before_retry 3
157 }
158 }
159 }8、现在开始测试。主备nginx都启动keepalived及nginx。
8.1、初始状态，查看主nginx的eth0设置：vip绑定在主nginx的eth0上。
查看备nginx的eth0设置：vip没有绑定在备nginx的eth0上。
访问www.hhh.com正常访问。
8.2、主机宕机，将主nginx的keepalived停止或将主nginx关机(相当于模拟宕机)，查看主nginx的eth0：eth0没有绑定vip。
注意：这里模拟的是停止 keepalived进程没有模拟宕机，所以还要将nginx进程也停止表示主nginx服务无法提供。
查看备nginx的eth0：vip已经漂移到备nginx。
访问www.hhh.com正常访问。
8.3、主机恢复，将主nginx的keepalived和nginx都启动。查看主nginx的eth0：查看备nginx的eth0：vip漂移到主nginx。
查看备nginx的eth0：eth0没有绑定vip。
访问：http://www.hhh.com/，正常访问。 注意：主nginx恢复时一定要将nginx也启动（通常nginx启动要加在开机启动中），否则即使vip漂移到主nginx也无法访问。
待续......
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原始发表：2019-10-02 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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