DevOps Classroom notes 11/Mar/2025

Ansible contd…

Installing tomcat on ubuntu

To install Apache Tomcat 10 on Ubuntu 24.04, follow these steps:


Step 1: Update System

Ensure your system is up-to-date:

sudo apt update

Step 2: Install Java

Tomcat requires Java. Install OpenJDK:

sudo apt install openjdk-17-jdk -y

Verify the installation:

java -version

Step 3: Create a Dedicated Tomcat User

For security, create a non-root user for Tomcat:

sudo useradd -r -m -U -d /opt/tomcat -s /bin/false tomcat

Step 4: Download Tomcat

Download the latest version of Tomcat 10 from the official website. Replace ` with the latest version number (e.g.,10.1.39`):

cd /tmp
wget https://dlcdn.apache.org/tomcat/tomcat-10/v10.1.39/bin/apache-tomcat-10.1.39.tar.gz

Extract the downloaded file:

sudo tar xzf apache-tomcat-10.1.39.tar.gz -C /opt/tomcat --strip-components=1

Step 5: Set Permissions

Set appropriate ownership and permissions:

sudo chown -R tomcat: /opt/tomcat
sudo chmod +x /opt/tomcat/bin/*.sh

Step 6: Configure Systemd Service

Create a systemd service file for Tomcat:

sudo nano /etc/systemd/system/tomcat.service

Add the following content:

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

[Service]
Type=forking

Environment=JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat

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

User=tomcat
Group=tomcat

[Install]
WantedBy=multi-user.target

Reload systemd to apply changes:

sudo systemctl daemon-reload
sudo systemctl enable tomcat.service
sudo systemctl start tomcat.service

Check the service status:

sudo systemctl status tomcat.service

Step 7: Access Tomcat

Open your browser and navigate to:

http://public-ip:8080/

You should see the default Apache Tomcat page.


This process ensures a secure and functional installation of Apache Tomcat 10 on Ubuntu 24.04[3][5][7].

Citations:
[1] https://www.digitalocean.com/community/tutorials/how-to-install-apache-tomcat-10-on-ubuntu-20-04
[2] https://www.atlantic.net/dedicated-server-hosting/how-to-install-tomcat-10-on-ubuntu-22-04/
[3] https://tecadmin.net/how-to-install-and-configure-tomcat-on-ubuntu-24-04/
[4] https://www.hostinger.com/tutorials/how-to-install-tomcat-on-ubuntu/
[5] https://www.hostmycode.in/tutorials/how-to-install-apache-tomcat-10-on-ubuntu
[6] https://www.digitalocean.com/community/tutorials/install-tomcat-on-linux
[7] https://www.youtube.com/watch?v=pL7A7DWgEzA
[8] https://ubuntuforums.org/showthread.php?t=2498200

Writing Ansible Playbook for the above

  • We have written a playbook which installs java, create a group and system user.
  • It also downloads tomcat but extracts incorrectly Refer Here for the changes

Exercise:

  • Make this playbook extract tomcat into /opt/tomcat directly rather than /opt/tomcat/apache-tomcat-10.1.39
  • Make this playbook comptabile with redhat/centos

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By continuous learner

devops & cloud enthusiastic learner

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