目录

Tomcat多实例配置

1.首先配置Tomcat单实例

2.tomcat多实例配置

1.1复制单实例tomcat

1.2修改端口，以启动多实例。多实例之间端口不能一致

1.3对比文件不同之处

3.启动tomcat

4.检查端口查看是否启动:

5.测试浏览器访问

 二、tomcat反向代理集群

 1、负载均衡器说明

2、配置负载均衡器

3.启动nginx

4.使用命令进行访问测试

5.、在浏览器上进行访问测试

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Tomcat多实例配置

多实例（多进程）：同一个程序启动多次，分为两种情况:

第一种：一台机器跑多个站点；

第二种：一个机器跑一个站点多个实例，配合负载均衡

1.首先配置Tomcat单实例

单实例配置参考博主博客
部署TOMCAT详解-CSDN博客

2.tomcat多实例配置

1.1复制单实例tomcat

[root@java-tomcat1 application]# cp -r tomcat/ tomcat2
[root@java-tomcat1 application]# cp -r tomcat/ tomcat3

1.2修改端口，以启动多实例。多实例之间端口不能一致

[root@java-tomcat1 application]# sed -i 's#8005#8011#;s#8080#8081#' tomcat2/conf/server.xml
[root@java-tomcat1 application]# sed -i 's#8005#8012#;s#8080#8082#' tomcat3/conf/server.xml

1.3对比文件不同之处

[root@java-tomcat1 application]# diff tomcat2/conf/server.xml tomcat3/conf/server.xml

3.启动tomcat

[root@java-tomcat2 application]# cd /data/application/tomcat2/bin/
[root@java-tomcat2 bin]# vim start.sh
#!/bin/bash
#tomcat2
export CATALINA_BASE="/data/application/tomcat2"

case "$1" in

start)
    $CATALINA_BASE/bin/startup.sh
    ;;
stop)
    $CATALINA_BASE/bin/shutdown.sh
esac
[root@java-tomcat2 bin]# chmod +x start
#修改catalina.sh ---添加如下内容
[root@java-tomcat2 bin]# vim catalina.sh
CATALINA_HOME=/data/application/tomcat2  #添加的环境变量注意修改
[root@java-tomcat bin]# cd /data/application/tomcat3/bin/
[root@java-tomcat3 bin]# vim start.sh
#!/bin/bash
#tomcat3
export CATALINA_BASE="/data/application/tomcat3"

case "$1" in

start)
    $CATALINA_BASE/bin/startup.sh 
    ;;
stop)
    $CATALINA_BASE/bin/shutdown.sh
esac
[root@java-tomcat3 bin]# chmod +x start.sh
[root@java-tomcat3 bin]# vim catalina.sh
CATALINA_HOME=/data/application/tomcat3

启动:
[root@java-tomcat2 ~]# /data/application/tomcat2/bin/start.sh start
[root@java-tomcat2 ~]# /data/application/tomcat3/bin/start.sh start

4.检查端口查看是否启动:

[root@java-tomcat1 application]# netstat -lntp | grep java 
tcp6       0      0 127.0.0.1:8011          :::*                    LISTEN      1729/java           
tcp6       0      0 127.0.0.1:8012          :::*                    LISTEN      1783/java           
tcp6       0      0 :::8081                 :::*                    LISTEN      1729/java           
tcp6       0      0 :::8082                 :::*                    LISTEN      1783/java           
tcp6       0      0 :::8019                 :::*                    LISTEN      1729/java           
tcp6       0      0 :::8029                 :::*                    LISTEN      1783/java

5.测试浏览器访问

http://192.168.50.114:8081/

http://192.168.50.114:8082/

 

 二、tomcat反向代理集群

 1、负载均衡器说明

 关闭防火墙和selinux

yum安装nginx
[root@nginx-proxy ~]# cd /etc/yum.repos.d/
[root@nginx-proxy yum.repos.d]# vim nginx.repo
[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=0
enabled=1
[root@nginx-proxy yum.repos.d]# yum install yum-utils -y
[root@nginx-proxy yum.repos.d]# yum install nginx -y

2、配置负载均衡器

备份原配置文件并修改

[root@nginx-proxy ~]# cd /etc/nginx/conf.d/
[root@nginx-proxy conf.d]# cp default.conf default.conf.bak
[root@nginx-proxy conf.d]# mv default.conf tomcat.conf
[root@nginx-proxy conf.d]# vim tomcat.conf
server {
    listen       80;
    server_name  localhost;
    access_log  /var/log/nginx/proxy.access.log  main;

    location / {
       proxy_pass http://testweb;
       proxy_set_header Host $host:$server_port;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }       
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    } 
}
创建upstream配置文件:
[root@nginx-proxy conf.d]# vim upstream.conf
upstream testweb {
	server 192.168.50.114:8081 weight=1 max_fails=1 fail_timeout=2s;
	server 192.168.50.114:8082 weight=1 max_fails=1 fail_timeout=2s;
}

3.启动nginx

[root@nginx-proxy ~]# systemctl start nginx

4.使用命令进行访问测试

使用curl 命令进行测试，tail进行关键字提取

[root@nginx-proxy ~]# curl -s 192.168.50.118 | tail -1 
8082
[root@nginx-proxy ~]# curl -s 192.168.50.118 | tail -1 
8081

5.、在浏览器上进行访问测试

http://192.168.50.118/

http://192.168.50.118/