Deploy a Spring boot application

• Spring boot application can be deployed in two ways
  • as an application
  • as a service
• Download Jar file Refer Here
• As an applicaton
  • Install openjdk 17 sudo apt install openjdk-17-jdk
  • run the application java -jar spring-petclinic-3.3.0-SNAPSHOT.jar
  • This application will be hosted on port 8080
• As a service:
  • Refer Here for an article to run spring boot as a service
  • Lets create a user spc with homedirectory as /var/lib/spc => sudo useradd -d '/var/lib/spc' -m -s '/bin/sh' spc
  • Download the jar file into /var/lib/spc => sudo wget -P /var/lib/spc/ https://referenceappslt.s3.ap-south-1.amazonaws.com/spring-petclinic-3.3.0-SNAPSHOT.jar
  • change ownership sudo chown spc:spc spring-petclinic-3.3.0-SNAPSHOT.jar
  • Now create a service file in the following location /usr/lib/systemd/system/spc.service
    “`
    [Unit]
    Description=A Spring Boot application
    After=syslog.target

  [Service]
  User=spc
  ExecStart=/usr/bin/java -jar /var/lib/spc/spring-petclinic-3.3.0-SNAPSHOT.jar SuccessExitStatus=143

  [Install]
  WantedBy=multi-user.target
  ``
* Relaod the daemonsudo systemctl daemon-reload`
  * Enable and start the spc service

Ansible Playbook for deploying spring petclinic

• Ubuntu: Initially lets focus on running this playbook on ubuntu
• Refer Here for the playbook written in the class to automate the deployment of spring petclinic