DevOps Classroomnotes 06/Oct/2023

YAML

• This is data representation language which uses name values

<name>: <value>

• YAML is inspired from python, so indentation’s become mandatory
• YAML files generally have .yaml or .yml as extensions
• Lets categorize data
  • Scalar/Simple
    • text
    • number
    • boolean
  • Complex
    • list/array
    • map/dictionary/object
• Refer Here for YAML syntax

---
name: test
mobile: '999999999'
email: test@test.com
CareerObjective: |
  A motivated individual with in-depth knowledge of languages 
  and development tools, seeking a position in a growth-oriented 
  company where I can use my skills to the advantage of the 
  company while having the scope to develop my own skills.
ProfessionalSummary:
  - Involved in designing CI/CD pipleines
  - Hands on experience in Develpoing Ansible playbooks
Skills:
  os:
    - windows
    - linux
  cm:
    - Ansible
  container:
    - Docker
Work experience:
  - company: xyz limited
    duration: Dec 2021 - present
    designation: DevOps Engineer
    RandR:
      - Ensuring Pipelines are healthy
      - Developing playbooks
  - company: abc limited
    duration: Dec 2019 - Dec 2021
    designation: DevOps Engineer
    RandR:
      - Ensuring Pipelines are healthy
      - Developing playbooks

• Basic structure of Ansible playbook

---
- name: <name of playbook - text>
  hosts: <where to execute-text>
  become: <need sudo permissions -bool>
  tasks: # <list of task>
  - name: Ensure apache is at the latest version # name of task
    ansible.builtin.yum: # module name
      name: httpd # module arguments
      state: latest # state

• Ansible Playbook structure
  

Lets create a simple playbook

• Goal: create a file @ /tmp/1.txt
• manual:

touch /tmp/1.txt

• where to execute: all machines
• Approximate playbook

---
- name: create file play
  become: false
  hosts: all
  tasks:
    - name: create file
      ansible.builtin.file:
        path: '/tmp/1.txt'
        state: file