Описание:

pod-definition.yaml

apiVersion: v1
kind: Pod 
metadata:
  name: myapp-pod  #string
  labels:
    app: myapp
    anyKey: AnyValue
spec:
  containers: #List/Array
    - name: nginx-container
      image: nginx

Запуск:

kubectl apply -f pod-definition.yaml

Запуск без .yaml описания:

kubectl run myapp-pod --image=nginx