利用systemd 实现 tomcat 多实例

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环境: CentOS 7 x86_64

1、安装jdk

1	rpm -ivh jdk-8u60-linux-x64.rpm

2、创建普通用户

1 2	getent group tomcat || groupadd -r tomcat getent passwd tomcat || useradd -r -d /opt -s /bin/nologin tomcat

3、下载tomcat 7

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cd /opt wget http://mirrors.ustc.edu.cn/apach ... omcat-7.0.64.tar.gz tar zxvf apache-tomcat-7.0.64.tar.gz mv apache-tomcat-7.0.64 tomcat01 chown -R tomcat:tomcat tomcat01 tar zxvf apache-tomcat-7.0.64.tar.gz mv apache-tomcat-7.0.64 tomcat02 chown -R tomcat:tomcat tomcat02

两个实例同时监听8080端口必然会产生冲突，所以必须修改.

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sed -i 's/8080/8081/g' /opt/tomcat01/conf/server.xml sed -i 's/8005/8001/g' /opt/tomcat01/conf/server.xml sed -i 's/8080/8082/g' /opt/tomcat02/conf/server.xml sed -i 's/8005/8002/g' /opt/tomcat02/conf/server.xml

AJP通常用不上，这里统一关闭

1 2	sed -i '/8009/d' /opt/tomcat01/conf/server.xml sed -i '/8009/d' /opt/tomcat01/conf/server.xml

tomcat在Linux 下默认工作模式是bio,性能非常低,建议使用apr或者nio，
这里改为nio,即非阻塞IO,性能比较好。

1 2	sed -i.bak 's#HTTP/1.1#org.apache.coyote.http11.Http11NioProtocol#' /opt/tomcat01/conf/server.xml sed -i.bak 's#HTTP/1.1#org.apache.coyote.http11.Http11NioProtocol#' /opt/tomcat02/conf/server.xml

3、创建启动文件

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cd /usr/lib/systemd/system cat >tomcat01.service <<EOF [Unit] Description=Apache Tomcat 8 After=network.target [Service] Type=oneshot ExecStart=/opt/tomcat01/bin/startup.sh ExecStop=/opt/tomcat01/bin/shutdown.sh RemainAfterExit=yes User=tomcat Group=tomcat [Install] WantedBy=multi-user.target EOF

tomcat02同理

1	sed 's/tomcat01/tomcat02/g' tomcat01.service > tomcat02.service

4、启动服务

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systemctl enable tomcat01 systemctl enable tomcat02 systemctl start tomcat01 systemctl start tomcat02

5、查看进程

1	ps aux |grep tomcat