第21章：Kubernetes高级调度

1. Node维度

• nodeSelector

• nodeAffinity

  （1）requiredDuringSchedulingIgnoredDuringExecution，和nodeSelector类似，强制（硬）亲和，但功能会比之更加丰富；注意：-nodeSelectorTerms-matchExpressions;
  示例如下：

apiVersion: v1
kind: Pod
metadata:
  name: with-node-affinity
spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: topology.kubernetes.io/zone
            operator: In
            values:
            - antarctica-east1
            - antarctica-west1
  containers:
  - name: with-node-affinity
    image: registry.k8s.io/pause:2.0

（2）preferredDuringSchedulingIgnoredDuringExecution，尽力调度到符合的，但不是强制（软）亲和；注意：-weight-preference-matchExpression;
示例如下：

apiVersion: v1
kind: Pod
metadata:
  name: with-affinity-anti-affinity
spec:
  affinity:
    nodeAffinity:
      preferredDuri