Apache-Tomcat---v10.1.24

Tomcat is widely used as it acts as a bridge between web servers and Java-based applications.

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Note

I performed the integration via Terminal -> SSH on a Linux ( CentOS ) VPS.

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Step 1:

Access your server via SSH.

ssh -p port_number username@hostname

Important

Replace

• "port_number" with the actual port for SSH.
• "username" with the actual username.
• "hostname" with the actual hostname.

Step 2:

Ensure your system is up to date.

sudo yum update -y

Step 3:

Install Java.

sudo yum install java-11-openjdk-devel -y

Important

You can install any desired version.

Verify the Java version.

java -version

Step 4:

Download and Install Apache Tomcat.

cd /tmp

curl -O https://downloads.apache.org/tomcat/tomcat-10/v10.1.0/bin/apache-tomcat-10.1.24.tar.gz

sudo mkdir /opt/tomcat

sudo tar xf apache-tomcat-10.1.24.tar.gz -C /opt/tomcat --strip-components=1

Step 5:

Ensure that the correct permissions are set.

sudo chmod -R 755 /opt/tomcat

Step 6:

Create a Tomcat User.

sudo groupadd user

Important

Replace 'user' with the desired username.

sudo useradd -M -s /bin/nologin -g user -d /opt/tomcat user

Important

Replace 'user' with the chosen username.

Step 7:

Create a Systemd Service File.

[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking
User=tomcat
Group=tomcat

Environment="JAVA_HOME=/usr/lib/jvm/jre"
Environment="CATALINA_PID=/opt/tomcat/temp/tomcat.pid"
Environment="CATALINA_HOME=/opt/tomcat"
Environment="CATALINA_BASE=/opt/tomcat"
Environment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC"
Environment="JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom"

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

[Install]
WantedBy=multi-user.target

Step 8:

Reload Systemd Manager Configuration.

sudo systemctl daemon-reload

Start Tomcat.

sudo systemctl start tomcat

Enable Tomcat Service to Start on Boot.

sudo systemctl enable tomcat

Step 9:

Open a specific Port (per your preference) in the Firewall settings.

sudo firewall-cmd --zone=public --permanent --add-port=8080/tcp

Important

Replace '8080' with the desired port.

Reload settings.

sudo firewall-cmd --reload

Step 10

Edit the server.xml file located in the conf directory.

sudo nano /opt/tomcat/conf/server.xml

Ensure the following is present:

<?xml version="1.0" encoding="UTF-8"?>
<Server port={"8005"} shutdown="SHUTDOWN">
    <Service name="Catalina">
        <Connector port={"yourPort"} protocol="HTTP/1.1"
                   connectionTimeout="20000"
                   redirectPort={"8443"} />
        <Engine name="Catalina" defaultHost={"yourHostnameOrIP"}>
            <Host name={"yourHostnameOrIP"} appBase="webapps"
                  unpackWARs="true" autoDeploy="true">
                <!-- You can add additional configurations here if needed -->
            </Host>
        </Engine>
    </Service>
</Server>

Note

Replace the values in "{}" with the desired data.

Step 11:

Edit Tomcat Users Configuration File.

sudo nano /opt/tomcat/conf/tomcat-users.xml

Add the following lines inside.

<role rolename="manager-gui"/>
<role rolename="admin-gui"/>
<user username="admin" password="password" roles="manager-gui,admin-gui"/>

Important

Replace the username and password if you don't want to get rekt.

Restart.

sudo systemctl restart tomcat

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Configure Apache HTTP to act as a reverse proxy for Tomcat.

Edit the Apache HTTP Server configuration file.

sudo nano /etc/httpd/conf/httpd.conf

Add the following lines:

<VirtualHost *:80>
    ServerName example.com
    ServerAlias www.example.com

    ProxyPass / https://yourHostnameOrIp:port/
    ProxyPassReverse / https://yourHostnameOrIp:port/

</VirtualHost>

Check your custom domain.

Deploy an app.

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That's it for now! I hope you find this documentation useful.