k8s创建pod-affinity亲和性时报错解决办法

1.如下报错

Error from server (BadRequest): error when creating
“pod-required-affinity-demo-2.yaml”: Pod in version “v1” cannot be
handled as a Pod: json: cannot unmarshal string into Go struct field
LabelSelectorRequirement.spec.affinity.podAffinity.requiredDuringSchedulingIgnoredDuringExecution.labelSelector.matchExpressions.values
of type []string

查看yaml文件

apiVersion: v1
kind: Pod
metadata:name: pod-secondlabels:app: backendtier: db
spec:containers:- name: busyboximage: busybox:latestimagePullPolicy: IfNotPresentcommand: ["sh","-c","sleep 3600"]affinity:podAffinity:requiredDuringSchedulingIgnoredDuringExecution:- labelSelector:matchExpressions:- key: app2operator: Invalues: myapp2topologyKey: kubernetes.io/hostname

问题报错说明spec.affinity.podAffinity.requiredDuringSchedulingIgnoredDuringExecution.labelSelector.matchExpressions.values这里格式错误，查看该字段用法

[root@master1 ~]# kubectl explain pod.spec.affinity.podAffinity.requiredDuringSchedulingIgnoredDuringExecution.labelSelector.matchExpressions
KIND:     Pod
VERSION:  v1RESOURCE: matchExpressions <[]Object>DESCRIPTION:matchExpressions is a list of label selector requirements. The requirementsare ANDed.A label selector requirement is a selector that contains values, a key, andan operator that relates the key and values.FIELDS:key	<string> -required-key is the label key that the selector applies to.operator	<string> -required-operator represents a key's relationship to a set of values. Validoperators are In, NotIn, Exists and DoesNotExist.values	<[]string>values is an array of string values. If the operator is In or NotIn, thevalues array must be non-empty. If the operator is Exists or DoesNotExist,the values array must be empty. This array is replaced during a strategicmerge patch.您在 /var/spool/mail/root 中有新邮件

values is an array of string values.
values是字符串值的数组

可以将values字段值改为下面两个形式都可以，测试都能创建pod成功running

  - key: app2operator: Invalues: - myapp2
topologyKey: kubernetes.io/hostname

  - key: app2operator: Invalues: ["myapp2"]
topologyKey: kubernetes.io/hostname