Yaml_Ansible_3_list

 List (Array) # Lists start with - (dash + space), Indentation matters

A sequence of items, represented as a list (array) in YAML.

Lists can be defined using either block style (with dashes) or inline style (with square brackets).

List Multiple-items

Simple List (Basic)

servers:

- web1

- web2

- db1

Inline List (Flow Style)

servers: [web1, web2, db1]

Nested List

matrix:

- - 1

- 2

- - 3

- 4

List of Maps (Very Important in Ansible 🚀)

users:

- name: John

age: 25

- name: Alice

age: 30

🔥 How to "call" (access) list of maps

Access full list {{ users }}

Access first item {{ users[0] }}

Access specific value {{ users[0].name }} # 👉 Output: John

Loop through list (Most important 🚀)

- name: Print users

debug:

msg: "{{ item.name }} is {{ item.age }} years old"

loop: "{{ users }}"

List inside Map

employee:

name: John

skills:

- Python

- Ansible

- Docker

👉 Here:

employee → map

skills → list inside the map

Access full list {{ employee.skills }}

Access specific item (index) {{ employee.skills[0] }} #👉 Output: Python

Loop through the list

- name: Print skills

debug:

msg: "{{ item }}"

loop: "{{ employee.skills }}"

Use inside message

- name: Print employee info

debug:

msg: "{{ employee.name }} knows {{ employee.skills[1] }}"

👉 Output: John knows Ansible

Structure How to Access

Map → key map.key

List → index list[0]

Map → List map.list_key[0]