Tomcat---多实例

多实例

作用：

多实例运行不同的应用（类似虚拟主机）

多实例运行相同的应用（实现负载均衡，支持高并发处理，session问题）

 

tomcat单机多实例配置

Tomcat：/usr/local/tomcat/{bin,lib}  

 

instans1: /usr/local/tomcat/instans1/{conf,logs,temp,work,webapps} 8081 

instans2: /usr/local/tomcat/instans2/{conf,logs,temp,work,webapps} 8082 

instans3: /usr/local/tomcat/instans3/{conf,logs,temp,work,webapps} 8083  

 

webapps: /webapps/ROOT 

 

1. Tomcat安装<略>

2. 配置多实例目录

# tree -d -L 3 /usr/local/tomcat/

/usr/local/tomcat/

├── bin

├── lib 

├── instance1 

│   ├── conf 

│   ├── logs

│   ├── temp

│   ├── webapps

│   └── work 

├├── instance2 

│   ├── conf 

│   ├── logs 

│   ├── temp 

│   ├── webapps

│   └── work 

├── instance3    

     ├── conf    

     ├── logs    

     ├── temp    

     ├── webapps    

     └── work

3. 配置实例server.xml

# vim /usr/local/tomcat/instance1/conf/server.xml 

# vim /usr/local/tomcat/instance1/conf/server.xml
<!-- <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> --> 
<Server port="8091" shutdown="SHUTDOWN">  
<Connector port="8081" protocol="HTTP/1.1"  
        connectionTimeout="20000"  
        redirectPort="8443" />  
<Host name="localhost" appBase="/webapps"  
        unpackWARs="true" autoDeploy="true">

 

4. 写启动脚本

# vim /usr/local/tomcat/instance1/tomcat-instance1.sh

 

#!/bin/bash
#instance1
export CATALINA_HOME="/usr/local/tomcat"
export CATALINA_BASE="/usr/local/tomcat/instance1"
case "$1" in
start)
    $CATALINA_HOME/bin/startup.sh;;
stop)
    $CATALINA_HOME/bin/shutdown.sh;;
restart)
    $CATALINA_HOME/bin/shutdown.sh
    sleep 3
    $CATALINA_HOME/bin/startup.sh;;
esac

 

5. 启动测试

# /usr/local/tomcat/instans1/tomcat-instance1.sh start 

# /usr/local/tomcat/instans2/tomcat-instance2.sh start

# /usr/local/tomcat/instans2/tomcat-instance3.sh start

# netstat -tanp |grep 80 

tcp 0 0 :::8081 :::* LISTEN 1587/java 

tcp 0 0 :::8082 :::* LISTEN 1560/java 

tcp 0 0 :::8083 :::* LISTEN 1752/java 

tcp 0 0 ::ffff:127.0.0.1:8091 :::* LISTEN 1587/java 

tcp 0 0 ::ffff:127.0.0.1:8092 :::* LISTEN 1560/java 

tcp 0 0 ::ffff:127.0.0.1:8093 :::* LISTEN 1752/java 

tcp 0 0 :::8009 :::* LISTEN 1560/java

思考将三个启动脚本合一？？？

/bin/startup.sh 脚本