CentOS 安装 tomcat 并设置 开机自启动

要在CentOS上安装Tomcat并设置开机自启，请按照以下步骤操作：

1. 安装Java环境，因为Tomcat是一个基于Java的应用服务器。

sudo yum install java-1.8.0-openjdk-devel

2. 添加Tomcat用户

sudo useradd -r -m -U -d /opt/tomcat -s /bin/false tomcat

3. 下载并安装Tomcat

wget https://downloads.apache.org/tomcat/tomcat-9/v9.0.62/bin/apache-tomcat-9.0.62.tar.gz
sudo tar xf apache-tomcat-9.0.62.tar.gz -C /opt/tomcat
sudo ln -s /opt/tomcat/apache-tomcat-9.0.62 /opt/tomcat/latest
sudo chown -RH tomcat:tomcat /opt/tomcat/latest
sudo sh -c 'chmod +x /opt/tomcat/latest/bin/*.sh'

4. 创建systemd服务文件

创建一个名为tomcat.service的文件：

sudo nano /etc/systemd/system/tomcat.service

添加以下内容：

[Unit]
Description=Tomcat 9 servlet container
After=network.target
 
[Service]
Type=forking
 
User=tomcat
Group=tomcat
 
Environment="JAVA_HOME=/usr/lib/jvm/jre"
Environment="CATALINA_PID=/opt/tomcat/latest/temp/tomcat.pid"
Environment="CATALINA_HOME=/opt/tomcat/latest"
Environment="CATALINA_BASE=/opt/tomcat/latest"
Environment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC"
Environment="JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom"
 
ExecStart=/opt/tomcat/latest/bin/startup.sh
ExecStop=/opt/tomcat/latest/bin/shutdown.sh
 
[Install]
WantedBy=multi-user.target

5. 重新加载systemd以读取新的服务文件，启用并启动Tomcat服务：

sudo systemctl daemon-reload
sudo systemctl enable tomcat
sudo systemctl start tomcat

6. 验证Tomcat是否正在运行：

sudo systemctl status tomcat

或者在浏览器中访问 http://your_server_ip:8080 来检查Tomcat是否安装并运行正常。