pod亲和性

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

首个运行Pod的Yaml

[root@k8smaster4 ns]# cat pod-required-affinity-demo-1.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: pod-first
  labels:
    app2: myapp2
    tier: frontend
spec:
  containers:
  - name: myapp
    image: docker.io/xianchao/tomcat-8.5-jre8:v1
    imagePullPolicy: IfNotPresent
  nodeName: k8snode5

亲和性运行Pod的Yaml

[root@k8smaster4 ns]# cat pod-required-affinity-demo-2.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: pod-second
  labels:
    app: backend
    tier: db
spec:
  containers:
  - name: busybox
    image: docker.io/library/busybox:1.28
    imagePullPolicy: IfNotPresent
    command: ["sh","-c","sleep 3600"]
  affinity:
    podAffinity: 
      requiredDuringSchedulingIgnoredDuringExecution:
      - labelSelector:
          matchExpressions:
          - key: app2
            operator: In
            values:
            - myapp2
        topologyKey: disk