Chap 59. Node Selector

• 한계 : 범위를 줄 수 없다.

# pod-definition.yaml
apiVersion:
kind : Pod
metadata:
	name : myapp-pod
spec:
	containers:
	- name : data-processor
		image : data-processor
	nodeSelector:
		size: Large

Label Nodes

$kubectl label nodes <node-name> <label-key>=<label-value>
$kubectl label nodes ndoe-1 size=Large

Chap 60. Node Affinity(노드 선호도)

• Node Affinity 의 주요 목적은 Pod 가 특정 노드에 호스팅되게하는 것이다.

apiVersion: kind:
metadata:
	name: myapp-pod
spec:
	containers:
		- name: data-processor
			image: data-processor
	affinity:
	  nodeAffinity:
			requiredDuringSchedulingIgnoredDuringExecution:  # when
				nodeSelectorTerms:
					- matchExpressions:
						- key: size 
							operator: In  # 오퍼레이터
							values:
								- Large
								- Midium 

apiVersion: kind:
metadata:
	name: myapp-pod
spec:
	containers:
		- name: data-processor
			image: data-processor
	affinity:
	  nodeAffinity:
			requiredDuringSchedulingIgnoredDuringExecution:  # when
				nodeSelectorTerms:
					- matchExpressions:
						- key: size 
							operator: NotIn  # 오퍼레이터
							values:
								- Small
								

apiVersion: kind:
metadata:
	name: myapp-pod
spec:
	containers:
		- name: data-processor
			image: data-processor
	affinity:
	  nodeAffinity:
			requiredDuringSchedulingIgnoredDuringExecution:  # when
				nodeSelectorTerms:
					- matchExpressions:
						- key: size 
							operator: Exists
						
								

Node Affinity Types