查看容器的metadata.ownerReferences

由控制器生成的Pod都有一个metadata.ownerReferences ,该字段用于标识该Pod从属于哪一个ReplicaSet。

用如下配置生成一个RS资源:

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apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: frontend
  labels:
    app: guestbook
    tier: frontend
spec:
  replicas: 3
  selector:
    matchLabels:
      tier: frontend
  template:
    metadata:
      labels:
        tier: frontend
    spec:
      containers:
      - name: nginx
        image: nginx

使用如下指令进行查看(我实际上使用的是VSCode的插件):

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kubectl get pods frontend-ndlm6 -o yaml
kubectl get pods frontend-ndlm6 -o yaml | grep ownerReferences

相关输出如下:

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metadata:
  labels:
    tier: frontend
  name: frontend-24c4l
  namespace: default
  ownerReferences:
  - apiVersion: apps/v1
    blockOwnerDeletion: true
    controller: true
    kind: ReplicaSet
    name: frontend
    uid: 3bdf82b0-7cb0-401f-9294-00d1b969720d
  resourceVersion: "8089"
  uid: 3e675a1b-2d2c-4a1a-a4d2-ab8daacb6a5c