DevOps Classroomnotes 03/Aug/2022

Ansible contd…

  • In Ansible we can execute the activity by using
    • adhoc command:
      • Can execute any ansible module
      • Good for rare activities
      • history cannot be maintained
    • Playbook: declaring the whole deployment as a yaml file
      • Good for automating activities used multiple times (frequently)
      • Playbook can be version controlled, so we will have history of all of the changes done.

Lets create a file using Ansible

  • Refer Here for the file module
  • Adhoc command:
    • ansible -m <module-name> -a <parameters/arguments> -i <inventory> all
    • module-name => ansible.builtin.file
    • arguments:
      • state argument: touch
      • path: /tmp/1.txt
    • ansible -m ansible.builtin.file -a 'path=/tmp/1.txt state=touch' all
  • Playbook:
- name: learning playbooks
  hosts: all
  become: no
    - name: create a empty file
        path: /tmp/1.txt
        state: touch


Lets Use Ansible to deploy a Java application on Tomcat server

  • Manual Steps
sudo apt update
sudo apt install openjdk-8-jdk -y
sudo apt install tomcat9 -y
sudo cp gameoflife.war /var/lib/tomcat9/webapps/
sudo systemctl restart tomcat9.service
  • Today lets install java using Ansible Playbook
  • For updating and installing java Refer Here
  • Created the ansible playbook Refer Here for the playbook

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