How to Setup Java Web Project in the Cloud?

Question

This is the situation: I rented (for a trial period) a cloud server and trying to deploy my application .war on Ubuntu Server. Installed Java 17, MySQL and even launched the app. Application run normally, but works on the localhost and program cannot be accessed by IP address.

Here is my pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.to</groupId>
    <artifactId>NameProject</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>NameProject Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>https://www.NameProject.net</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>17</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
        </dependency>
        <dependency>
            <groupId>org.thymeleaf.extras</groupId>
            <artifactId>thymeleaf-extras-springsecurity5</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.lucene</groupId>
            <artifactId>lucene-core</artifactId>
            <version>9.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.lucene</groupId>
            <artifactId>lucene-queryparser</artifactId>
            <version>9.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.lucene</groupId>
            <artifactId>lucene-analyzers-common</artifactId>
            <version>8.11.2</version>
        </dependency>
        <dependency>
            <groupId>org.imgscalr</groupId>
            <artifactId>imgscalr-lib</artifactId>
            <version>4.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.13.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>com.sun.mail</groupId>
            <artifactId>javax.mail</artifactId>
            <version>1.6.2</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>NameProject</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

There are no other configuration files. Everything is inside the program.

For solve problem accessibility, I tried installing Nginx and make a proxy server from various examples on the Internet.. Unfortunately, I didn't find any working option and after all my tries, the Nginx stopped working completely. Maybe I doing something wrong, but uninstalling and reinstalling does not help... So, my question is quite trivial: How to connect a domain name and make the application available on the internet? How to install and configure Nginx for Spring Boot Application? Maybe it can be done differently (without Nginx)?

Answer 1

If the status Nginx Active: inactive (dead) try to write systemctl unmask nginx.service and then to do restart. Add entry to file /etc/nginx/nginx.conf

http {
…
    server {
        listen 80;
        listen [::]:80;
        server_name domainName.com www.domainName.com;

        location / {
            proxy_pass http://127.0.0.1:8080/; #write real server IP
        }
    }
...
}

If you purchased domain name through Google service, you need to add two DNS records: "A" and "CNAME". Follow Google Domains instructions. For install SSL/HTTPS certificate on Ubuntu, look at the next example on github. And don't forget to install firewall (like "UFW") and close all unnecessary ports.