I. Overview

There is a Spring Cloud jar package, the file name is: RDS.jar. The jdk1.8 version is required, and it needs to be deployed on the Centos 7.5 server. It is best to set it to start automatically!

Two, install jdk

Turn off the firewall

systemctl stop firewalld.service
systemctl disable firewalld.service

Install jdk

Unzip jdk

mkdir /data
tar zxvf jdk-8u211-linux-x64.tar.gz -C /data/

Add environment variables

vi /etc/profile

The inside is as follows:

set java environment
JAVA_HOME=/data/jdk1.8.0_211/
JRE_HOME=/data/jdk1.8.0_211/jre     
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

Reload environment variables

source /etc/profile

View java version

# java -version
java version "1.8.0_211"Java(TM) SE Runtime Environment (build 1.8.0_211-b12)Java HotSpot(TM)64-Bit Server VM (build 25.211-b12, mixed mode)

Start java application

Create application directory

mkdir /data/rds/

Upload RDS.jar to this directory

Start the java application

 java -jar /data/rds/RDS.jar

JVM running for 11.918 appears, indicating that the startup is successful.

Three, package service service

Start script

Let's create a startup script first

vim /etc/init.d/rds

The content is as follows:

#! /bin/bash
#
# auditd        Start jar package
#
# chkconfig:23451188
# description: This is rds project
 
####### jar file path
export PROJECT_HOME=/data/rds/export PROJECT_NAME=RDS
#######

####### Start command
export START="source /etc/profile && cd $PROJECT_HOME;nohup java -jar ${PROJECT_HOME}/${PROJECT_NAME}.jar > output.log 2>&1 &"stop_jar(){for i in $(ps -aux|grep $PROJECT_NAME|grep -v grep|awk '{print $2}');do
  kill -9 $i;
 done
} case"$1"in
start)
  echo "Starting $PROJECT_NAME"
  eval $START
        ;;
 
stop)
  echo "Stop $PROJECT_NAME"
  stop_jar
        ;;
restart)
  echo "Stop $PROJECT_NAME..."
  stop_jar
  echo "Starting $PROJECT_NAME"
  eval $START
        ;;
esac

Package centos7 service

Enter the system directory and create a service file

cd /usr/lib/systemd/system/
vim rds.service

The content is as follows:

[ Unit] 
Description=rds - rds web server 
After=network.target remote-fs.target nss-lookup.target

[ Service] 
Type=forking 
ExecStart=/etc/init.d/rds start
ExecStop=/etc/init.d/rds stop
PrivateTmp=true[Install] 
WantedBy=multi-user.target

Description:

[ The Unit] part is mainly a description of the service, including Description and After, Description is used to describe the service, After is used to describe the service category
[ The Service] part is the key to the service, and is the setting of some specific operating parameters of the service. Here Type=forking is the form of background running, ExecStart is the specific running command of the service, ExecStop is the stop command, and PrivateTmp=True means to assign an independent service to the service. Temporary space, note: the start, restart, and stop commands in the [Service] part all require the use of absolute paths. Using relative paths will cause an error!
[ The Install] part is related to the service installation, which can be set as multi-user

After the service script is written in accordance with the above, it is saved in the /usr/lib/systemd/system directory with 754 permissions
Then execute (modify or add files need to execute the following statement to take effect)

Load configuration

systemctl daemon-reload

Test start command

systemctl restart rds

Check if the java process exists

ps -aux|grep RDS

Set up auto start

systemctl enable rds

Reference link for this article:

https://www.cnblogs.com/lamp01/p/8932740.html

https://www.jianshu.com/p/6753bcc72ead

Centos 7 install jdk and package service service