vip: 10.110.200.200
nginx1（keepalived）： 10.110.200.201
nignx2（keepalived）: 10.110.200.202
tomcat1: 10.110.200.203
tomcat2: 10.110.200.204
关闭selinux，firewalld，iptables（iptables -F）
一、安装好tomcat：
A、安装2台tomcat服务器：
1、安装jdk
yum -y install tomcat -y
yum -y install tomcat-webapps.noarch tomcat-admin-webapps.noarch -y
yum install -y tomcat-docs-webapp.noarch tomcat-javadoc -y
2、创建java超链接 ln -s /usr/local/java1.8 /usr/local/java
3、 导入环境变量
vi /etc/profile
JAVA_HOME=/usr/local/java
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME PATH
CATALINA_HOME=/usr/local/tomcat
export CATALINA_HOME
4、tomcat 开机启动
在/usr/lib/systemd/system目录下增加tomcat9文件，内容如下：[Unit]
Description=Tomcat
After=syslog.target network.target remote-fs.target nss-lookup.target
[Service]
Type=oneshot
ExecStart=/usr/local/tomcat/tomcat9/bin/startup.sh
ExecStop=/usr/local/tomcat/tomcat9/bin/shutdown.sh
ExecReload=/bin/kill -s HUP $MAINPID
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target
如何修改tomcat的默认端口
在web.xml文件中，有一段如下：
将port "8080"改成80端口
新版本的tomcat修改 server.xml 的8080
如何修改tomcat的默认路径
cd /var/lib/tomcat/webapps
或者cd /usr/share/tomcat/webapps
mkdir myjsp
在server.xml文件中，有一段如下：
如何修改tomcat的默认首页
在web.xml文件中，有一段如下：
在
B、安装2台nginx+keepalived服务器：
1、nginx1-2:
yum install nginx keepalived -y
2、nginx1(keepalived):
vim /etc/keepalived/keepalved.conf
vrrp_script check_nginx{
script "/etc/keepalived/check_nginx.sh"
interval 2
weight 5
user root
}
vrrp_instance VI_1 {
state MASTER
interface eth0
mcast_src_ip 10.110.200.201
virtual_router_id 51
preempt
priority 120
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
check_nginx
}
virtual_ipaddress {
10.110.200.200
}
}
vim /etc/keepalived/check_nginx.sh
#!/bin/bash
count=0
for (( k=0; k<2; k++ ))
do
check_code=$( curl --connect-timeout 3 -sL -w "%{http_code}\n" http://localhost -o /dev/null )
if [ "$check_code" != "200" ]; then
count=count+1
continue
echo $count
else
count=0
break
echo "break"
fi
done
if [ "$count" != "0" ]; then
systemctl stop keepalived
echo "keepalived is stoped"
exit 1
else
exit 0
fi
-
nginx2(keepalived):
vim /etc/keepalived/keepalved.confvrrp_script check_nginx{
script "/etc/keepalived/check_nginx.sh"
interval 2
weight -5
user root
enable_script_security
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
mcast_src_ip 10.110.200.202
virtual_router_id 51
preempt
priority 120
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
check_nginx
}
virtual_ipaddress {
10.110.200.200
}
}
vim /etc/keepalived/check_nginx.sh
#!/bin/bash
count=0
for (( k=0; k<2; k++ ))
do
check_code=$( curl --connect-timeout 3 -sL -w "%{http_code}\n" http://localhost -o /dev/null )
if [ "$check_code" != "200" ]; then
count=count+1
continue
echo $count
else
count=0
break
echo "break"
fi
done
if [ "$count" != "0" ]; then
systemctl stop keepalived
echo "keepalived is stoped"
exit 1
else
exit 0
fi
C、配置nginx负债均衡让8080转发给80端口:
upstream backend {
ip_hash;
server 10.1.1.1:8000 down;
server 10.1.1.2:8080 weight=10 max_fails=3 fail_timeout=10s;
server 10.1.1.3:6801 weight=20 max_fails=3 fail_timeout=10s;
}
server{
listen 80;
server_name www.test.com;
location / {
proxy_pass http://backend;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_redirect default;
root html;
index index.jsp;
}
}
以上代码必须放在http{} 内，如果你的nginx.conf调用了子配置文件 www.conf，那 include /etc/nginx/conf.d/web.conf; 必须放在nginx.conf的http{} 内。
**
D、