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
  tasks:
    - name: create a empty file
      ansible.builtin.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
wget https://referenceapplicationskhaja.s3.us-west-2.amazonaws.com/gameoflife.war
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