Tomcat多实例和负载均衡

Tomcat多实例

Tomcat多实例的步骤（理论）

安装好 jdk和安装 tomcat

cd /opt
tar zxvf apache-tomcat-9.0.16.tar.gz
mkdir /usr/local/tomcat
mv apache-tomcat-9.0.16 /usr/local/tomcat/tomcat1
cp -a /usr/local/tomcat/tomcat1 /usr/local/tomcat/tomcat2

配置 tomcat 环境变量

vim /etc/profile.d/tomcat.sh

#tomcat1
export CATALINA_HOME1=/usr/local/tomcat/tomcat1
export CATALINA_BASE1=/usr/local/tomcat/tomcat1
export TOMCAT_HOME1=/usr/local/tomcat/tomcat1

#tomcat2
export CATALINA_HOME2=/usr/local/tomcat/tomcat2
export CATALINA_BASE2=/usr/local/tomcat/tomcat2
export TOMCAT_HOME2=/usr/local/tomcat/tomcat2

source /etc/profile.d/tomcat.sh

修改 tomcat2 中的 server.xml 文件，要求各 tomcat 实例配置不能有重复的端口号

vim /usr/local/tomcat/tomcat2/conf/server.xml

"8006" shutdown="SHUTDOWN">		#22行，修改Server prot，默认为8005 -> 修改为8006
"8081" protocol="HTTP/1.1"		#69行，修改Connector port，HTTP/1.1  默认为8080 -> 修改为8081
"8010" protocol="AJP/1.3" redirectPort="8443" />	#116行，修改Connector port AJP/1.3，默认为8009 -> 修改为8010

修改各 tomcat 实例中的 startup.sh 和 shutdown.sh 文件，添加 tomcat 环境变量

vim /usr/local/tomcat/tomcat1/bin/startup.sh 

# -----------------------------------------------------------------------------
# Start Script for the CATALINA Server
# -----------------------------------------------------------------------------
##添加以下内容
export CATALINA_BASE=$CATALINA_BASE1
export CATALINA_HOME=$CATALINA_HOME1
export TOMCAT_HOME=$TOMCAT_HOME1

---

vim /usr/local/tomcat/tomcat1/bin/shutdown.sh

# -----------------------------------------------------------------------------
# Stop script for the CATALINA Server
# -----------------------------------------------------------------------------
export CATALINA_BASE=$CATALINA_BASE1
export CATALINA_HOME=$CATALINA_HOME1
export TOMCAT_HOME=$TOMCAT_HOME1

---

vim /usr/local/tomcat/tomcat2/bin/startup.sh 

# -----------------------------------------------------------------------------
# Start Script for the CATALINA Server
# -----------------------------------------------------------------------------
export CATALINA_BASE=$CATALINA_BASE2
export CATALINA_HOME=$CATALINA_HOME2
export TOMCAT_HOME=$TOMCAT_HOME2

vim /usr/local/tomcat/tomcat2/bin/shutdown.sh

# -----------------------------------------------------------------------------
# Stop script for the CATALINA Server
# -----------------------------------------------------------------------------
export CATALINA_BASE=$CATALINA_BASE2
export CATALINA_HOME=$CATALINA_HOME2
export TOMCAT_HOME=$TOMCAT_HOME2

---

启动各 tomcat 中的 /bin/startup.sh

/usr/local/tomcat/tomcat1/bin/startup.sh 
/usr/local/tomcat/tomcat2/bin/startup.sh 

netstat -natp | grep java

浏览器访问测试

http://192.168.80.10:8080
http://192.168.80.10:8081

Tomcat多实例的具体实验步骤（实操）

第一步：放入安装关闭防火墙和selinux

第二步：安装JDK并设置环境变量
安装JKD

编写java脚本设置JDK环境变量

运行脚本文件，然后查看jdk版本

第三步：安装tomcat
解压缩tomcat

创建tomcat多实例的目录，并移动复制文件

第四步：配置tomcat环境变量
编写脚本

运行脚本文件

第五步：修改 tomcat2 中的 server.xml 文件，要求各 tomcat 实例配置不能有重复的端口号
修改主配置文件，修改Server prot，默认为8005 -> 修改为8006

修改Connector port，HTTP/1.1 默认为8080 -> 修改为8081

修改Connector port AJP/1.3，默认为8009 -> 修改为8010

第六步：修改各 tomcat 实例中的 startup.sh 和 shutdown.sh 文件，添加 tomcat 环境变量
修改tomcat1的startup.sh

修改tomcat1的shutdown.sh

修改tomcat2的startup.sh

修改tomcat2的shutdown.sh

第七步：启动各 tomcat 中的 /bin/startup.sh

第八步：浏览器中访问测试

Nginx+Tomcat负载均衡、动静分离

Nginx+Tomcat负载均衡、动静分离的步骤（理论）

Nginx 服务器：192.168.80.10:80
Tomcat服务器1：192.168.80.100:80
Tomcat服务器2：192.168.80.101:8080 192.168.80.101:8081

部署Nginx 负载均衡器

systemctl stop firewalld
setenforce 0

yum -y install pcre-devel zlib-devel openssl-devel gcc gcc-c++ make

useradd -M -s /sbin/nologin nginx

cd /opt
tar zxvf nginx-1.12.0.tar.gz -C /opt/

cd nginx-1.12.0/

./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-file-aio --with-http_stub_status_module --with-http_gzip_static_module --with-http_flv_module

make && make install

ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin/

vim /lib/systemd/system/nginx.service

[Unit]
Description=nginx
After=network.target
[Service]
Type=forking
PIDFile=/usr/local/nginx/logs/nginx.pid
ExecStart=/usr/local/nginx/sbin/nginx
ExecrReload=/bin/kill -s HUP $MAINPID
ExecrStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true
[Install]
WantedBy=multi-user.target

chmod 754 /lib/systemd/system/nginx.service
systemctl start nginx.service
systemctl enable nginx.service

部署2台Tomcat 应用服务器

systemctl stop firewalld
setenforce 0

tar zxvf jdk-8u91-linux-x64.tar.gz -C /usr/local/

vim /etc/profile

export JAVA_HOME=/usr/local/jdk1.8.0_91
export JRE_HOME=${
     JAVA_HOME}/jre
export CLASSPATH=.:${
     JAVA_HOME}/lib:${
     JRE_HOME}/lib
export PATH=${
     JAVA_HOME}/bin:$PATH

source /etc/profile

tar zxvf apache-tomcat-8.5.16.tar.gz

mv /opt/apache-tomcat-8.5.16/ /usr/local/tomcat

/usr/local/tomcat/bin/shutdown.sh 
/usr/local/tomcat/bin/startup.sh

netstat -ntap | grep 8080

动静分离配置
Tomcat1 server 配置

mkdir /usr/local/tomcat/webapps/test
vim /usr/local/tomcat/webapps/test/index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>