DevOps Classroomnotes 02/Jan/2023

Ansible Contd….

  • Lets try to install tomcat 10 on ubuntu 22.04 Refer Here
  • Ansible WOW (Ways of Working)
    • Ensure your manual steps are working
    • For each step try to find a module which can help expressing desired state.
  • Manual Steps
sudo apt update
sudo apt install openjdk-11-jdk -y
java -version
sudo useradd -m -U -d /opt/tomcat -s /bin/false tomcat
VERSION=10.1.4
wget https://www-eu.apache.org/dist/tomcat/tomcat-10/v${VERSION}/bin/apache-tomcat-${VERSION}.tar.gz -P /tmp
sudo tar -xf /tmp/apache-tomcat-${VERSION}.tar.gz -C /opt/tomcat/
sudo ln -s /opt/tomcat/apache-tomcat-${VERSION} /opt/tomcat/latest
sudo chown -R tomcat: /opt/tomcat
sudo sh -c 'chmod +x /opt/tomcat/latest/bin/*.sh'
sudo nano /etc/systemd/system/tomcat.service
sudo systemctl daemon-reload
sudo systemctl enable --now tomcat
sudo systemctl status tomcat
  • Now for web interface follow the docs Refer Here
    Preview

Ansible Playbook to automate the above steps

  • Refer Here for the changes done to install java
  • Ensure syntax is correct ansible-playbook -i hosts --syntax-check tomcat.yml
  • Execute the playbook
    Preview
  • To enable verbose logging of ansible -v to -vvvv
  • Now we are supposed to create a user called tomcat
    • with home directory in /opt/tomcat
    • with shell /bin/false
    • with group tomcat (same as username)
  • Module in ansible for useradd Refer Here
  • Exercise: try writing the playbook to do the tomcat installation on centos Refer Here

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By continuous learner

devops & cloud enthusiastic learner

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