如何在Helm子图中设置与环境相关的values.yaml? [英] How to set environment related values.yaml in Helm subcharts?

问题描述

我目前正在使用Helm在Kubernetes集群中部署我的应用程序.现在，我还需要能够针对不同的环境修改values.yaml文件中的某些参数.

I am currently deploying my applications in a Kubernetes cluster using Helm. Now I also need to be able to modify some parameter in the values.yaml file for different environments.

对于仅具有一个级别的简单图表，通过具有不同的values-local.yaml和values-prod.yaml并将其添加到helm install标志，例如，这很容易. helm install --values values-local.yaml.

For simple charts with only one level this is easy by having different values-local.yaml and values-prod.yaml and add this to the helm install flag, e.g. helm install --values values-local.yaml.

但是，如果我有第二层子图，这又需要区分多个环境之间的值，则无法设置自定义values.yaml.

But if I have a second layer of subcharts, which also need to distinguish the values between multiple environments, I cannot set a custom values.yaml.

假定以下结构:

| chart
   | Chart.yaml
   | values-local.yaml
   | values-prod.yaml
   | charts
      | foo-app
         | Chart.yaml
         | values-local.yaml
         | values-prod.yaml
         | templates
            | deployments.yaml
            | services.yaml

这将无法正常工作，因为Helm希望子图中出现values.yaml.

This will not work since Helm is expecting a values.yaml in subcharts.

我现在的解决方法是在subchart/values.yaml中具有if-else-construct并将其设置为父values.yaml中的全局变量.

My workaround right now is to have an if-else-construct in the subchart/values.yaml and set this in as a global variable in the parent values.yaml.

*foo-app/values.yaml*
    {{ - if .Values.global.env.local }}
        foo-app:
          replicas: 1
    {{ else if .Values.global.env.dev}}
        foo-app:
          replicas: 2
    {{ end }}

---

parent/values-local.yaml
global:
  env:
   local: true

parent/values-prod.yaml
global:
  env:
   prod: true

但是我希望周围有更好的方法，所以我不需要依赖这些自定义标志.

But I hope there is a better approach around so I do not need to rely on these custom flags.

希望您能在此方面为我提供帮助.

I hope you can help me out on this.

推荐答案

这是我的处理方式(供参考

Here is how I would do it (for reference overriding values):

1. 在子图表(foochart)中，将副本数定义为变量:
   • foochart/values.yaml

1. In your child charts (foochart) define the number of replicas as a variable:
   • foochart/values.yaml

...
replicas: 1
...

• foochart/templates/deployment.yaml

...
spec:
  replicas: {{ .Values.replicas }}
...

1. 然后，在主图表的值文件中:

1. Then, in your main chart's values files:

• values-local.yaml

foochart:
  replicas: 1

• values-prod.yaml

foochart:
  replicas: 2

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