DevOps Classroom Series – 04/Jun/2021

Attributes

• An attribute is a specific detail about node, Attributes are use by chef to understand

  • The current state of node

• Attributes are defined by

  • The nodes as saved on the chef infra server
  • Attributes passed via JSON file Refer Here for understanding JSON and yaml formats
  • Cookbook
  • Roles
  • Environments

• Refer Here for the lamp server cookbook with attributes

• Refer Here for the correction.

Scenario: Tomcat

• Refer Here for installing tomcat on ubuntu 18.04
• Make a note of all the manual steps
• Create a ubuntu 18 VM and execute the manual steps to verify if they are working
• Manual Steps
  1. sudo apt update
  2. sudo apt-cache search openjdk
  3. sudo apt install openjdk-8-jdk -y
  4. java -version
  5. sudo groupadd tomcat
  6. sudo useradd -s /bin/false -g tomcat -d /opt/tomcat tomcat
  7. cd /tmp/
  8. wget https://mirrors.estointernet.in/apache/tomcat/tomcat-9/v9.0.46/bin/apache-tomcat-9.0.46.tar.gz
  9. sudo mkdir /opt/tomcat
  10. sudo tar xzvf apache-tomcat-*tar.gz -C /opt/tomcat –strip-components=1
  11. cd /opt/tomcat
  12. sudo chgrp -R tomcat /opt/tomcat
  13. sudo chmod -R g+r conf
  14. sudo chmod g+x conf
  15. sudo chown -R tomcat webapps/ work/ temp/ logs/
  16. sudo nano /etc/systemd/system/tomcat.service
  17. sudo systemctl daemon-reload
  18. sudo systemctl start tomcat
  19. sudo systemctl status tomcat