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YAML
What is YAML?
YAML (YAML Ain't Markup Language) is a human-readable data serialization language used to store and configure data.
It is commonly used for configuration files in DevOps tools and applications.
YAML is easy to read and write compared to formats like XML or JSON.
YAML is a human-readable data serialization language used mainly for configuration files in DevOps tools and applications.
Definition:-
History of YAML
YAML was first released in 2001 by:
-
Clark Evans
-
Ingy döt Net
-
Oren Ben-Kiki
The goal was to create a simple, readable configuration language.
Purpose of YAML
1️⃣ Store configuration settings
2️⃣ Define automation workflows
3️⃣ Configure DevOps pipelines
4️⃣ Manage infrastructure and applications
Where YAML is Used
YAML is widely used in DevOps tools such as:
-
Docker
-
Kubernetes
-
GitHub Actions
-
Ansible
Basic Structure of YAML
YAML uses indentation instead of brackets.
</> YAML
name: Meenal
role: DevOps Engineer
skills:
- Linux
- Docker
- Kubernetes
Explanation:
-
name→ key -
Meenal→ value -
skills→ list of items
YAML File Extension
Common YAML file extensions:
-
.yaml -
.yml
Example:
</> YAML
docker-compose.yml
kubernetes.yaml
Basic YAML Elements
</> YAML
name: DevOps
Key-Value Pair
</> YAML
tools:
- Git
- Docker
- Jenkins
List
Nested Data
</> YAML
student:
name: Rahul
course: DevOps
Real-Time Example
</> YAML
version: "3"
services:
web:
image: nginx
ports:
- "80:80"
This YAML file tells Docker to run a web server using the Nginx image.
ADVANTAGE AND DISADVANTAGE
Advantages of YAML
✔ Easy to read
✔ Human-friendly syntax
✔ Less complex than XML
✔ Widely used in DevOps tools
Disadvantages of YAML
❌ Sensitive to indentation
❌ Large files can become complex
YAML
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