将 generateName 用于由 helm 安装的 yaml 文件

Question

我有 upload.yaml 文件上传脚本到 mongo，我用 helm 打包。

apiVersion: batch/v1
kind: Job
metadata:
  generateName: upload-strategy-to-mongo-v2
spec:
  parallelism: 1
  completions: 1
  template:
    metadata:
      name: upload-strategy-to-mongo
    spec:
      volumes:
      - name: upload-strategy-to-mongo-scripts-volume
        configMap:
          name: upload-strategy-to-mongo-scripts-v3
      containers:
      - name: upload-strategy-to-mongo
        image: mongo
        env:
        - name: MONGODB_URI
          value: @@@@
        - name: MONGODB_USERNAME
          valueFrom:
            secretKeyRef:
              name: mongodb-user
              key: @@@@
        - name: MONGODB_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mongodb-user
              key: @@@@@
        volumeMounts:
          - mountPath: /scripts
            name: upload-strategy-to-mongo-scripts-volume
        command: ["mongo"]
        args:
          - $(MONGODB_URI)/ravnml
          - --username
          - $(MONGODB_USERNAME)
          - --password
          - $(MONGODB_PASSWORD)
          - --authenticationDatabase
          - admin
          - /scripts/upload.js
      restartPolicy: Never
---
apiVersion: v1
kind: ConfigMap
metadata:
  creationTimestamp: null
  name:  upload-strategy-to-mongo-scripts-v3
data:
  upload.js: |
    // Read the object from file and parse it
    var data = cat('/scripts/strategy.json');
    var obj = JSON.parse(data);

    // Upsert strategy
    print(db.strategy.find());
    db.strategy.replaceOne(
        { name : obj.name },
          obj,
        { upsert: true }
    )
    print(db.strategy.find());
  strategy.json: {{ .Files.Get "strategy.json" | quote }}

现在我每次安装时都使用 generateName 生成自定义名称。我需要安装多个包并且我要求名称是动态的。

错误当我使用 helm install <name> <tar.gz file> -n <namespace> 安装此脚本时，出现以下错误

Error: rendered manifests contain a resource that already exists. Unable to continue with install: could not get information about the resource: resource name may not be empty

但如果我不使用 generateName，我也可以安装。有什么想法吗？

我查看了各种资源，但它们似乎没有回答如何通过 helm 安装。参考资料看起来： https://github.com/kubernetes/kubernetes/issues/44501; https://zknill.io/posts/kubernetes-generated-names/

Answer 1

这似乎是一个已知问题。 Helm 不适用于 generateName。对于唯一名称，您可以使用 Helm's build in properties，例如 Revision 或 Name。参考以下link：

https://github.com/helm/helm/issues/3348#issuecomment-482369133

将 generateName 用于由 helm 安装的 yaml 文件

using generateName for yaml file to be installed by helm

kubernetes

kubectl

kubernetes-helm

kubernetes-pod