ec2startupscript.sh

#!/bin/bash 
# Update package lists 
sudo apt update 
# Install OpenJDK 17 
sudo apt install -y openjdk-17-jdk 
# Verify the installation
java -version

sudo snap install aws-cli --classic

# Variables 
USER=petclinicapp 
GROUP=petclinicapp 
S3_BUCKET=petclinicapp 
S3_FILE_PATH=petclinicapp-v1.jar 
LOCAL_FILE_PATH=/home/$USER/$S3_FILE_PATH
SERVICE_FILE=/etc/systemd/system/petclinicapp.service


# Create user and group 
sudo groupadd $GROUP
sudo useradd -m -g $GROUP $USER 

# Set permissions for the user's home directory 
sudo mkdir -p /home/$USER/ 
sudo chown $USER:$GROUP /home/$USER/ 

# Download the JAR file from S3 
aws s3 cp s3://$S3_BUCKET/$S3_FILE_PATH $LOCAL_FILE_PATH 
sudo chown $USER:$GROUP $LOCAL_FILE_PATH 

# Create systemd service 
sudo bash -c "cat > $SERVICE_FILE" <<EOL 
[Unit]
Description=Spring Boot Application - Petclinic
After=syslog.target [Service]

[Service]
User=$USER
ExecStart=java -jar $LOCAL_FILE_PATH
SuccessExitStatus=143
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target
EOL
 
#Reload systemd and enable the service 
sudo systemctl daemon-reload 
sudo systemctl enable petclinicapp.service 
sudo systemctl start petclinicapp.service 

echo "Setup complete. The petclinicapp service has been started."