YAML Basics for Kubernetes

Step-01: Comments & Key Value Pairs¶

Space after colon is mandatory to differentiate key and value

# Defining simple key value pairs
name: kalyan
age: 23
city: Hyderabad

Step-02: Dictionary / Map¶

Set of properties grouped together after an item
Equal amount of blank space required for all the items under a dictionary
```
person:
  name: kalyan
  age: 23
  city: Hyderabad
```

Step-03: Array / Lists¶

Dash indicates an element of an array

person: # Dictionary
  name: kalyan
  age: 23
  city: Hyderabad
  hobbies: # List  
    - cycling
    - cookines
  hobbies: [cycling, cooking]   # List with a differnt notation

Step-04: Multiple Lists¶

Dash indicates an element of an array

person: # Dictionary
  name: kalyan
  age: 23
  city: Hyderabad
  hobbies: # List  
    - cycling
    - cooking
  hobbies: [cycling, cooking]   # List with a differnt notation  
  friends: # Multiple Lists
    - name: friend1
      age: 22
    - name: friend2
      age: 25

Step-05: Sample Pod Tempalte for Reference¶

apiVersion: v1 # String
kind: Pod  # String
metadata: # Dictionary
  name: myapp-pod
  labels: # Dictionary 
    app: myapp         
spec:
  containers: # List
    - name: myapp
      image: stacksimplify/kubenginx:1.0.0
      ports: # Multiple Lists
        - containerPort: 80
          protocol: "TCP"
        - containerPort: 81
          protocol: "TCP"