Linux开机启动Tomcat

1. 需求背景

   Linux重启后要手动执行"startup.sh"启动Tomcat，比较麻烦，想要Linux开机启动Tomcat。
   

2. 开机启动

   #----------------------------------------------------------
   sudo tee /usr/bin/tomcat.sh <<-'EOF'
   #! /bin/bash
   nohup /opt/tomcat/bin/startup.sh > /opt/tomcat/nohup.log &
   EOF
   chmod +x /usr/bin/tomcat.sh
   #----------------------------------------------------------
   sudo tee /etc/systemd/system/tomcat.service <<-'EOF'
   [Unit]
   Description=tomcat
   After=syslog.target network.target
   [Service]
   Environment="JAVA_HOME=/opt/jdk"
   Type=oneshot
   RemainAfterExit=yes
   ExecStart=/usr/bin/tomcat.sh
   [Install]
   WantedBy=multi-user.target
   EOF
   #----------------------------------------------------------
   systemctl enable tomcat
   #----------------------------------------------------------
   
   # 启动tomcat
   systemctl start tomcat
   # 停止tomcat
   systemctl stop tomcat
   # 重启tomcat
   systemctl restart tomcat
   # 查看tomcat状态
   systemctl status tomcat
   

3. 注意事项

   #----------------------------------------------------------
   "tomcat.service"不添加Environment="JAVA_HOME=/opt/jdk"报错如下
   #----------------------------------------------------------
   Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
   At least one of these environment variable is needed to run this program
   #----------------------------------------------------------
   解决方法："startup.sh"首行添加"export JAVA_HOME=/opt/jdk"可解决
   #----------------------------------------------------------