nodeAffinity

标签：node kubectl root k8smaster4 pod ns nodeAffinity

查看路径

[root@k8smaster4 ns]# kubectl explain pod.spec.affinity

Affinity类别

nodeAffinity
podAffinity
podAntiAffinity

编写Yaml文件

[root@k8smaster4 ns]# cat pod-nodeAffinity-demo.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: pod-node-affinity-demo
  namespace: default
  labels:
    app: myapp
    tier: frontend
spec:
  affinity:
    nodeAffinity:
     requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: zon 
            operator: In
            values:
            - foo
            - bar
  containers:
  - name: myapp
    image: docker.io/xianchao/tomcat-8.5-jre8:v1
    imagePullPolicy: IfNotPresent

查看Pod信息

[root@k8smaster4 ns]# kubectl describe pod pod-node-affinity-demo

node添加标签

[root@k8smaster4 ns]# kubectl label node k8snode5 zon=foo

查看node标签

[root@k8smaster4 ns]# kubectl get nodes --show-labels

查看某一个node标签

[root@k8smaster4 ns]# kubectl get node k8snode5 --show-labels

删除某个node标签

[root@k8smaster4 ns]# kubectl label node k8snode5 zon-

软亲和性Yaml

[root@k8smaster4 ns]# cat prefer-nodeAffinity-demo.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: pod-preference-affinity-demo
  namespace: default
  labels:
    app: test
    mysql: test
spec:
  containers:
  - name: myapp
    image: docker.io/xianchao/tomcat-8.5-jre8:v1
    imagePullPolicy: IfNotPresent
  affinity:
    nodeAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
      - preference:
          matchExpressions:
          - key: zone1
            operator: In
            values:
            - foo1
            - bar1
        weight: 10
      - preference:
          matchExpressions:
          - key: zone2
            operator: In
            values:
            - foo2
            - bar2
        weight: 20  

标签：node,kubectl,root,k8smaster4,pod,ns,nodeAffinity
From： https://blog.51cto.com/u_11726705/5991839