DevOps Classroom notes 21/Feb/2026

Making playbook work on redhat 10

• Manual steps

sudo dnf update -y
sudo dnf install java-21-openjdk-devel -y 

• Rest of the steps are same the service file contents

[Unit]
Description=Apache Tomcat 10
After=network.target

[Service]
Type=forking

User=tomcat
Group=tomcat

Environment="JAVA_HOME=/usr/lib/jvm/java-17-openjdk"
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

Restart=always

[Install]
WantedBy=multi-user.target

• Refer Here for changes done to create a new playbook for redhat
• Refer Here for changes done to combine both playbooks into one.

Problem: I want to install mongo db

• In Ansible we can make our playbooks reusable and share them within your org or across community.
• This can be acheived with
  • ansible roles
  • ansible collections
• Ansible galaxy has lots of roles and collections available for use.

Lets install mysql using ansible roles

• install role

ansible-galaxy role install geerlingguy.mysql

• Refer Here for the changes done to use role