yaml_Ansible_4_map

 Map Structure

Map refers to Dictionary or Key-Value pair structure,

Map Structured-data

A YAML map (mapping) is basically a key → value structure (like a dictionary in Python or JSON object).

name: Alagarasan

role: DevOps Consultant

experience: 8

👉 Here:

name, role, experience → keys

Values → strings / numbers

- name: Create VM

hosts: localhost

vars:

vm_name: test-vm

vm_cpu: 2

👉 Here:

vars is a map

Inside it → vm_name, vm_cpu are keys

Types of Maps

Inline Map

Block Map

Inline Map

person: {name: Alagarasan, role: DevOps Consultant, experience: 8}

Block Map

person:

name: Alagarasan

role: DevOps Consultant

experience: 8

Access full map

- debug:

var: person

Access individual values

- debug:

msg: "{{ person.name }}"

- debug:

msg: "{{ person.role }}"

🔹 Nested Map (Map inside Map)

Inside map we always have key value pairs. We can have multiple key value pairs inside a map. We can also have a map inside a map which is called nested map.

employee:

name: Alagarasan

role: DevOps Consultant

skills:

primary: Ansible

secondary: AWS

Access nested value

- debug:

msg: "{{ person.address.city }}"

👉 Structure:

employee → parent key

Inside it → another map

Map with list

person:

name: Alagarasan

skills:

- Ansible

- Docker

- Kubernetes

Nested Map + List (Real-world 🔥🔥)

servers:

- name: web01

config:

ip: 192.168.1.10

ports:

- 80

- 443

- name: web02

config:

ip: 192.168.1.11

ports:

- 8080

👉 Access:

{{ servers[0].config.ip }}

{{ servers[0].config.ports[1] }}