缺少为容差更改Kubernetes部署yaml文档

Question

我在Kubernetes集群中创建了一个变异的准入webhook。api突变webhook为部署YAML增加了容忍度。但是，它显示一个错误Internal error occurred: jsonpatch add operation does not apply: doc is missing path: "/spec/template/spec/tolerations/"

我的Yaml示例文件：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  namespace: webhook
  labels:
    app: nginx 
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  strategy:
    rollingUpdate:
      maxSurge: 100%
      maxUnavailable: 50%
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx
          image: "nginx:1.17"
          imagePullPolicy: Always
          ports:
            - containerPort: 80
              name: nginx

Python代码：

     mutations = []
     mutations.append({"op": "add", "path": "/spec/template/spec/tolerations/" + str(counter),
 "value": {key: t[key]}})

但是，在测试时出现上述错误。请帮帮忙。:(

Answer 1

我看不到整个文件，因此我无法更正它。但是问题出在您的路径上，您可能正在链接一个数组--您必须指定一个索引。当您想要在数组的末尾添加一个元素时，可以像这样使用-1：spec/template/spec/containers/0/env/-1

看一下这个例子

• 缩短的yaml文件：

...
spec:
  template:
    spec:
      containers: # this is an array, there is 0 in the path 
        - name: somename
          image: someimage
          env: # another array, we are putting the element at the end, therefore index is -1
          - name: SOME_VALUE_0
            value: "foo"
          - name: SOME_VALUE_1
            value: "bar"
          # I want to add second env variable SOME_VALUE_2 here
...

• kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
     - ../link/to/your/yaml
patchesJson6902:
     - target:
            ...
       patch: |-
            - op: "add"
              path: "/spec/jobTemplate/spec/template/spec/containers/0/env/-1"
              value: {name: "SOME_VALUE_2", value: "baz"}