Node Selector, Node Affinity

Node Selector

• Pod가 특정 노드에서만 작동하도록 하는 것.
• 복잡한 요구 사항이 있으면 Node Selector로는 구현 불가 

apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
spec:
  containers:
  - name: data-processor
    image: data-processor
  nodeSelector:
    size: Large //label

 

Node Affinity

• Node Selector와 달리 특정 노드에 특정 Pod를 할당하는 것을 제한 가능 

apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
spec:
  containers:
  - name: data-processor
    image: data-processor
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoreDuringExecution:
      	nodeSelectorTerms:
        - matchExpressions:
          - key: size
            operator: In
            values:
            - Large
            - Medium

apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
spec:
  containers:
  - name: data-processor
    image: data-processor
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoreDuringExecution:
      	nodeSelectorTerms:
        - matchExpressions:
          - key: size
            operator: NotIn
            values:
            - Small

• Node Affinity Types
  • requiredDuringSchedulingIgnoredDuringExecution
  • preferDuringSchedulingIgnoredDuringExecution
  • requiredDuringSchedulingRequiredDuringExecution