YAML

YAML (YAML Ain't Markup Language) (2001) is a human-readable data serialization language.

Basic YAML file example with one record:

# An employee record
martin_smith:
    name: Martin Smith
    job: Developer
    skill: Elite

Basic YAML file example with two record:

# My employee records
# An employee record
- martin_smith:
    name: Martin Smith
    job: Developer
    skill: Elite

# An employee record
- Thomas_Edisson:
    name: Tomas Eddison
    job: Developer
    skill: Basic

Install utilities

• Ubuntu: snap install yq

Activities

1. Write a YAML file and test it with yq: yq r your_new_yaml_file.yml
2. Read 10 YAML tips for people who hate YAML https://www.redhat.com/sysadmin/yaml-tips. (yamllint)
3. Read https://en.wikipedia.org/wiki/Comparison_of_data-serialization_formats
4. Read stackoverflow YAML related questions: https://stackoverflow.com/questions/tagged/yaml?tab=Votes

Related terms

• Linter
• Ansible playbooks examples
• CloudFormation
• YAML provides node anchors (using &) and references (using *)
• to_nice_yaml
• kubectl get nodes -o yaml

See also

• JSON, jq, jid, mlr, JWT, BSON, Miller, Content-type:, application/json, BadJSON, Webhook, jsonc, ndjson, import json, Google Custom Search JSON API, jsonpath, JSON-LD, JSON tree, JSON-RPC
• YAML, TOML, yq, Dhall, YAML anchors, yamllint
• XML, AJAX, libxml2, Expat, XMLHttpRequest (HTR), XXE

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Source: https://en.wikiversity.org/wiki/DevOps/YAML