tomcat在ubuntu环境下配置开机自启动

查了好多资料 终于总结了个靠谱的方法
tomcat目录下的bin目录中有个catalina.sh,该脚本是tomcat的启动脚本，startup.sh 和 shutdown.sh都是通过调用该脚本启动的。
复制一份catalina.sh进行编辑，将改文件头部改为

#!/bin/bash

### BEGIN INIT INFO
# Provides:          XXX
# Required-Start:
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start XXX daemon at boot time
# Description:       Start XXX daemon at boot time
### END INIT INFO

JAVA_HOME=/usr/lib/jvm/java-1.11.0-openjdk-amd64  # 此处为jdk安装目录
CATALINA_HOME=/home/y/soft/apache-tomcat-9.0.62 # tomcat安装目录
CLASSPATH=.:$JAVA_HOME/lib:$CATALINA_HOME/lib

我的catalina.sh修改后为:

#!/bin/bash

### BEGIN INIT INFO
# Provides:          XXX
# Required-Start:
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start XXX daemon at boot time
# Description:       Start XXX daemon at boot time
### END INIT INFO
JAVA_HOME=/usr/lib/jvm/java-1.11.0-openjdk-amd64
CATALINA_HOME=/home/y/soft/apache-tomcat-9.0.62
CLASSPATH=.:$JAVA_HOME/lib:$CATALINA_HOME/lib 
start()
{
	if [ -f $CATALINA_HOME/bin/startup.sh ]
	then
	    echo $"Starting Tomcat"
		$CATALINA_HOME/bin/startup.sh
	    RETVAL=$?
	    echo "OK"
	    return $RETVAL
	fi
}
 
 
stop()
{
	if [ -f $CATALINA_HOME/bin/shutdown.sh ]
	then
	    echo $"Stopping Tomcat"
		$CATALINA_HOME/bin/shutdown.sh
	    RETVAL=$?
	    sleep 3
	    ps -fwwu tomcat | grep apache-tomcat | grep -v grep | grep -v PID | awk '{print $2}'| xargs kill -9
	    echo "OK"
	   return $RETVAL
	fi
}
 
 
case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	restart)
		echo $"Restarting Tomcat"
		$0 stop
		sleep 3
		$0 start
		;;
	*)
		echo $"Usage:$0{start|stop|restart}"
		exit 1
		;;
esac
 
exit $RETVAL

在ubuntu中 通过apt-get安装的软件包默认放在/usr/lib目录下
将修改后的catalina.sh复制到/etc/init.d目录下 改名为 tomcat

sudo cp ./catalina.sh /etc/init.d/tomcat
sudo chmod +x /etc/init.d/tomcat

第二条命令的目的是为了让tomcat可执行

systemctl reload-daemon

重新加载服务配置

service tomcat start

启动tomcat服务测试，执行成功后 访问tomcat测试服务配置是否成功。
成功后接下来配置开机启动
修改/etc/rc.local文件，修改结果为

#!/bin/bash
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
service tomcat start
exit 0

网上说要修改/etc/rc.d目录下的rc.local文件，但是我找不到 只找到了/etc/rc0.d目录 于是在该目录下也放了一份

sudo chmod +x /etc/rc.local
sudo chmod +x /etc/rc0.d/rc.local

给这两个文件加可执行权限

sudo reboot

重启测试，tomcat启动比nginx慢一步 原因还不明白，曾经让我以为配置失败 但是等了一会儿之后 发现配置成功