Complete steps for deploying jar package projects using Shell scripts in Linux

1. Install JDK

Check the computer's operating digits:
uname -ar

2017 x86_64 x86_64 x86_64 GNU/Linux
If it is shown here as 64-bit, download the corresponding 64-bit package

Download address of jdk, it is recommended to download the tar.gz package
www.oracle.com/technetwork…

Now start the official installation of JDK

1. Upload the jdk installation package to /root

jdk-8u131-linux-x64.tar.gz

2. Confirm whether the system has already installed JDK

rpm -qa|grep jdk

rpm -e --nodeps software name //If it is checked that it is installed, execute the uninstall command

3. Unzip the jdk installation package to the specified directory

tar -xvf jdk-8u131-linux-x64.tar.gz -C /usr/local/

4. Enter the decompression directory

cd /usr/local

5. Modify the jdk folder name

mv jdk1.8.0_131 jdk

6. Configure environment variables

Modify the environment variable configuration file:

vi /etc/profile

Press i to enter edit mode

Jump to the last line and add the following content. Please note that the JDK here should be consistent with the path where you installed JDK.

#java runtime setting
export JAVA_HOME=/usr/local/jdk
export CLASSPATH=$JAVA_HOME/lib:.
export PATH=$JAVA_HOME/bin:$PATH

Press ESC and enter :wq to save and exit

7. Reload environment configuration

source /etc/profile

8. Test whether JDK installation is ok

java -version

9. Write hello.java

vi Hello.java

class Hello{
	public static void main(String[] args){
	System.out.println("hello,java");
	}
}

Then press ESC :wq to exit

vi /etc/profile i write

javac Hello.java

2. Deploy jar package

1. Create data, then create a test directory, and create related folders and files according to the following structure

The directory structure is:

Place the main jar package under app, such as myjar, and the following is the content of the related restart.sh:

#!/bin/bash

base_home='/data/test'
app_name='myjar'

pid=`ps -ef|grep ${app_name}|grep -v grep|grep -v restart|awk '{print$2}'`
if [ -n "${pid}" ] ;then
 kill -9 ${pid}
 sleep 10
fi

gclog_file=$base_home/log/gc.log
dump_dir=$base_home/heapdump
errorlogs_dir=$base_home/log

java -Xmx1g -Xms1g -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:GCLogFileSize=128M -XX:NumberOfGCLogFiles=1 -Xloggc:${gclog_file} -XX:HeapDumpPath=${dump_dir} -jar $base_home/app/${app_name}.jar --spring.config.location=$base_home/config/application.yml >> $base_home/log/${app_name}_$(date +'%Y%m%d').log &

It should be noted here that {app_name}.jar may contain the following errors:

Error: Unable to access jarfile /app/myjar.jar

Here you may need to change to an absolute path, as follows:

/datat/test/app/${app_name}.jar

Access the relevant path: (modify here according to the relevant port of your jar

http://ip:8080/

View the log path:

cd /log
Here, the log file with the name and date of the relevant jar package will be displayed, such as: myjar_20190530.log

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