目录

一、环境

二、配置tomcat

三、配置nfs共享

四、配置nginx

1、两台都需要折磨配置

2、在http下面插入这两条信息

 五、配置keepalived

1、安装

2、重新启动一下keepalived查看IP

六、验证双机热备

1、查看调度器备的IP，ip漂移说明keepalived生效

 2、访问静态页面

3、 访问动态页面

---

一、环境

三台主机分别为

192.168.28.3 tomcat

192.168.28.4  nfs

192.168.28.5 tomcat

192.168.28.6 nginx，keepalived

192.168.28.7 nginx，keepalived

二、配置tomcat

两台tomcat配置把解压包拖进主机解压移动

tar xf apache-tomcat-8.5.16.tar.gz tar xf apache-tomcat-8.5.16.tar.gz mv apache-tomcat-8.5.16 /usr/local/tomcatmv apache-tomcat-8.5.16 /usr/local/tomcatln -s /usr/local/tomcat/bin/startup.sh /usr/bin/qd1ln -s /usr/local/tomcat/bin/shutdown.sh /usr/bin/tz1

###创建挂载目录
/usr/local/tomcat
mkdir webapps1
###修改tomcat的访问目录
vim /usr/local/tomcat/conf/server.xml
###修改host字段插入
<Context path="" docBase="/usr/local/tomcat/webapps1" />

三、配置nfs共享

mkdir /opt/web1mkdir /opt/web2vim /etc/exportssystemctl restart nfsexportfs

##安装nfs服务

yum -y install nfs

##创建共享目录

mkdir /opt/web1

mkdir /opt/web2

##配置nfs的配置文件vim /etc/exports

 systemctl restart nfs

 回到两台Tomcat的上查看共享目录

[root@localhost tomcat]# mkdir webapps1showmount -e 192.168.28.4mount 192.168.28.4:opt/web2 /usr/local/tomcat/webapps1echo tomcat2 > webapps1/index.jspqd1

##查看挂载情况

df

###分别书写测试页面

echo tomcat1 > webapps1/index.jsp

echo tomcat2 > webapps1/index.jsp

##启动Tomcat

qd1

qd0

##查看端口

netstat -anptu |grep java

测试页面

四、配置nginx

1、两台都需要折磨配置

192.168.28.6

192.168.28.7

#安装
yum -y install epel-release.noarch yum -y install nginxvim /etc/nginx/nginx.conf

2、在http下面插入这两条信息

 在server字段插入下方这句话

 启动nginx

 访问一下测试页面

 查看调度器

 五、配置keepalived

1、安装

192.168.28.6

192.168.28.7

 yum -y install keepalivedvim /etc/keepalived/keepalived.conf systemctl restart keepalived.service scp /etc/keepalived/keepalived.conf 192.168.28.7:/etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs {notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 192.168.200.1smtp_connect_timeout 30router_id LVS_DEVEL            ###从的编号要改动一下 LVS_DEVEL1vrrp_skip_check_adv_addr#vrrp_strictvrrp_garp_interval 0vrrp_gna_interval 0
}vrrp_instance VI_1 {state MASTER                  ###从改为BACKUPinterface ens33               ###网卡名virtual_router_id 51priority 100                  ###从的优先级要比主低advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.28.200          ###VIP用来访问的虚拟IP}
}
virtual_server 192.168.28.200 8080 {       ###vip对应的真是IP 在下面delay_loop 6lb_algo rr persistence_timeout 50protocol TCPreal_server 192.168.28.3 8080 {        ###这是Tomcat服务器的IPweight 1HTTP_GET {url { path /testurl/test.jsp}
url { path /testurl2/test.jsp}url { path /testurl3/test.jsp}connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.28.5 8080 {       ###这是Tomcat服务器的IPweight 1HTTP_GET {url { path /testurl/test.jsp}url { path /testurl2/test.jsp
}connect_timeout 3nb_get_retry 3delay_before_retry 3}}
}

2、重新启动一下keepalived查看IP

systemctl restart keepalived.service ip a

VIP页面访问测试

静态页面

 动态页面

六、验证双机热备

模拟调度器主宕机systemctl  stop keepalived，使用调度器备访问

1、查看调度器备的IP，ip漂移说明keepalived生效

 2、访问静态页面

3、 访问动态页面