CentOS7.2安装JDK + Tomcat

1. 下载

通过wget 下载jdk以及tomcat

# cd /home

下载jdk：

# wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz

下载tomcat

# wget http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.16/bin/apache-tomcat-8.5.16.tar.gz

2. 解压
解压下载的jdk，tomcat到/usr/local 目录下

# tar -zxvf apache-tomcat-8.5.16.tar.gz -C /usr/local
# tar -zxvf jdk-8u131-linux-x64.tar.gz -C /usr/local

# cd /usr/local

重命名为jdk8， tomcat8

# mv jdk1.8.0_131 jdk8
# mv apache-tomcat-8.5.16 tomcat8

3. Java环境配置

注：进入profile 之后按 i 键进行编辑，Esc 键进入命令模式输出 :wq! 保存并退出

# vi /etc/profile

在profile文件中添加

export JAVA_HOME=/usr/local/jdk8
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

执行profile让新配置生效

# source /etc/profile

检查是否安装成功

# java -version

java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11,mixed mode)

4. Tomcat环境配置

配置防火墙
查看防火墙是否开启

# systemctl status firewalld

通过systemctl status firewalld查看firewalld状态，发现当前是dead状态，即防火墙未开启。

firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)

通过systemctl start firewalld开启防火墙，没有任何提示即开启成功。

# systemctl start firewalld

再次查看开启状态提示以及开启

firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: active (running) since Tue 2017-06-13 17:03:25 CST; 16s ago
 Main PID: 12686 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─12686 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

关闭防火墙的命令如下：

# systemctl stop firewalld

开启Tomcat默认的8080端口

# firewall-cmd --permanent --zone=public --add-port=8080/tcp
# firewall-cmd --reload

如果还是不能访问，在阿里云的安全组中配置

创建Tomcat 用户

基于安全管理的前提条件下，安装Tomcat前，单独建立系统帐号和组用于运行Tomcat。

首先，创建一个新的tomcat组：

# groupadd tomcat

然后，创建一个新的tomcat用户，指定home目录 /usr/local/tomcat8 ，并将tomcat用户加入tomcat组:

# useradd -M -s /bin/nologin -g tomcat -d /usr/local/tomcat8 tomcat

配置目录的归属

# chown -R tomcat:tomcat /usr/local/tomcat8

建立自启动服务

# vi /etc/systemd/system/tomcat.service

[Unit]
Description=Apache Tomcat 8
After=syslog.target network.target

[Service]
Type=forking
User=tomcat
Group=tomcat

Environment=JAVA_HOME=/usr/local/jdk8
Environment=CATALINA_PID=/usr/local/tomcat8/temp/tomcat.pid
Environment=CATALINA_HOME=/usr/local/tomcat8
Environment=CATALINA_BASE=/usr/local/tomcat8
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/bin/kill -15 $MAINPID

[Install]
WantedBy=multi-user.target

配置自启动服务

# systemctl daemon-reload
# systemctl start tomcat
# systemctl enable tomcat

CentOS7.2安装JDK + Tomcat

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