YAML Cheat Sheet¶

# Mapping
key: value

# List
items:
  - one
  - two

# Nested mapping
web:
  hosts:
    web01:
      ansible_host: 10.0.1.10

# List of mappings
users:
  - { name: deploy, groups: sudo }
  - { name: appuser, groups: docker }

# Literal block scalar — preserves newlines exactly
motd: |
  Line one.
  Line two.

# Folded block scalar — joins lines with spaces
description: >
  This becomes
  one single line.

# Anchor and alias — reuse a block
defaults: &defaults
  retries: 3
  timeout: 30

web_settings:
  <<: *defaults
  port: 80