Step by step, do the following:
Installing Java JDK 17 or 21 However, a reasonably recent (LTS) release is recommended.
Ensure software-properties-common is installed.
sudo apt install software-properties-common
Install Amazon Corretto 21
wget -O - https://apt.corretto.aws/corretto.key | sudo gpg --dearmor -o /usr/share/keyrings/corretto-keyring.gpg && \
echo "deb [signed-by=/usr/share/keyrings/corretto-keyring.gpg] https://apt.corretto.aws stable main" | sudo tee /etc/apt/sources.list.d/corretto.list
sudo apt-get update; sudo apt-get install -y java-21-amazon-corretto-jdk
java -version
Installing NGINX
sudo apt install nginx
sudo systemctl status nginx
sudo systemctl restart nginx
Be shore you stop apache2 & allow OpenSSH and nginx ports throw UFW
sudo ufw allow OpenSSH
sudo ufw allow in "Nginx Full"
sudo ufw enable
sudo ufw status
install unzip and zip too
sudo apt install unzip zip
Installing the Spring Boot CLI
# Install sdkman The Software Development Kit Manager
curl -s "https://get.sdkman.io" | bash
# Install springboot CLI
sdk install springboot
# Note: if you get sdk not found, do the following
nano ~/.bashrc
## Add this line in the end of file
export PATH=$PATH:/usr/local/sdkman/bin
## Finally
source ~/.bashrc
sdk install springboot
## Then we can init new project like this
spring version
spring init --list
spring init --build=maven --java-version=21 --dependencies=web,data-jpa --packaging=jar app-name.zip
Install Maven
wget https://dlcdn.apache.org/maven/maven-3/3.9.6/binaries/apache-maven-3.9.6-bin.tar.gz
tar -xvf apache-maven-3.9.6-bin.tar.gz
mv apache-maven-3.9.6 /opt/
# Setting M2_HOME and Path Variables
M2_HOME='/opt/apache-maven-3.9.6'
PATH="$M2_HOME/bin:$PATH"
export PATH
# Show the mvn version
mvn -version
Build the jar file
java -jar build/libs/app-name-0.0.1-SNAPSHOT.jar
Creating an Init Script for the Spring Boot Application
Do nano /etc/systemd/system/helloworld.service and add the content:
[Unit]
Description=Spring Boot app-name
After=syslog.target
After=network.target[Service]
User=username
Type=simple
[Service]
ExecStart=/usr/bin/java -jar /home/userdir/app-name/build/libs/app-name-0.0.1-SNAPSHOT.jar
Restart=always
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=appname
[Install]
WantedBy=multi-user.target
start the service
sudo systemctl start appname
Configuring a Reverse Proxy for the Spring Boot Application
server {
listen 80;
listen [::]:80;
server_name example.com;
location / {
proxy_pass http://localhost:8080/;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Port $server_port;
}
}
sudo ln -s /etc/nginx/sites-available/appname.conf /etc/nginx/sites-enabled/
# Unlink the default
sudo unlink /etc/nginx/sites-enabled/default
# Test the conf
sudo nginx -t
# Restart nginx
sudo systemctl restart nginx
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