Kubectl补丁：是否可以在一次补丁执行中将多个值添加到数组中 [英] kubectl patch: Is it possible to add multiple values to an array within a sinlge patch execution

问题描述

我尝试使用kubectl patch将另外两个值添加到Kubernetes部署的参数列表中。我已经检查了官方记录的(https://kubernetes.io/docs/tasks/manage-kubernetes-objects/update-api-object-kubectl-patch/)变体，但未能一次追加多个值。

假设以下是简单的部署：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: test
spec:
  replicas: 1
  selector:
    matchLabels:
      name: test
  template:
    metadata:
      labels:
        name: test
      name: test
    spec:
      containers:
      - image: alpine
        name: test
        command:
        - echo
        args:
        - my
        - text

现在，我想将其他值追加到args部分。这一次只适用于一个值：

添加单个附加值

kubectl patch deployments.apps test --type=json -p='[{"op": "add", "path": "/spec/t
emplate/spec/containers/0/args/-", "value": "additional" }]'

这行得通，我只剩下以下几点：

...
        args:
        - my
        - text
        - additional

但是运行包含一组值的修补程序时会出现错误：

# running:
k patch deployments.apps test --type=json -p='[{"op": "add", "path": "/spec/template/spec/containers/0/args/-", "value": ["additional","text"] }]'

# results in:
The request is invalid: patch: Invalid value: "...": v1.Deployment.Spec: v1.DeploymentSpec.Template: v1.PodTemplateSpec.Spec: v1.PodSpec.Containers: []v1.Container: v1.Container.Args: []string: ReadString: expects " or n, but found [, error found in #10 byte of ...|itional",["additiona|..., bigger context ...|{"containers":[{"args":["my","text","additional",["additional","text"]],"command":["echo"],"image":"|...

有没有人知道在不覆盖整个args数组的情况下，通过一个补丁命令向数组添加多个值的方法？感谢您的帮助。

推荐答案

下面使用单个补丁，但不太干：

kubectl patch deployment <deployment-name> -n <namespace> --type "json" -p '[
{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"arg-1"},
{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"arg-2"},
{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"arg-3"}]'

我一直在为cert-manager执行类似的操作，以实现全自动TLS：

kubectl patch deployment cert-manager -n cert-manager --type "json" -p '[
{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"--default-issuer-name=letsencrypt-prod"},
{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"--default-issuer-kind=ClusterIssuer"},
{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"--default-issuer-group=cert-manager.io"}]'

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