k8s: NodeAffinity之优先调度策略和必须条件满足的调度策略

apiVersion: v1
kind: Pod
metadata:
   name: with-node-affinity
   labels:
      app: node-affinity-pod
spec:
   containers:
     - name: nginx
       image: nginx
   affinity:
      nodeAffinity:
         preferredDuringSchedulingIgnoredDuringExecution:
           - weight: 1
             preference:
               matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                     - i-1ykfhwu2

将pod 优先调度到hostname 为i-1ykfhwu2的node,如果不满足，也可以调度

apiVersion: v1
kind: Pod
metadata:
   name: with-node-affinity
   labels:
      app: node-affinity-pod
spec:
   containers:
     - name: nginx
       image: nginx
   affinity:
      nodeAffinity:
         requiredDuringSchedulingIgnoredDuringExecution:
             nodeSelectorTerms:
             - matchExpressions:
                 - key: kubernetes.io/hostname
                   operator: In
                   values:
                     - i-1ykfhwu2

这个配置是要求必须调度到hostname 为i-1ykfhwu2的结点，如果不存在，则pod会处于pending状态