duanniu3385 2016-01-27 10:59
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从Kubernetes类型生成YAML清单

I'm looking into writing a tool that generates Kubernetes definitions programatically for our project.

I've found that the API types in Kubernetes can be found in k8s.io/kubernetes/pkg/api. I would like to output YAML based on these types.

Given an object like this:

ns := &api.Namespace{
    ObjectMeta: api.ObjectMeta{
        Name: "test",
    },
}

What's the best way to generate the YAML output expected by kubectl create?

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  • duannaoye0732 2016-01-27 15:16
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    Found it, for future reference, here's what you might want to do:

    package main
    
    import (
        "os"
    
        "k8s.io/kubernetes/pkg/api/unversioned"
        "k8s.io/kubernetes/pkg/api/v1"
        "k8s.io/kubernetes/pkg/runtime/serializer/json"
    )
    
    func main() {
        ns := &v1.Namespace{
            TypeMeta: unversioned.TypeMeta{
                Kind:       "Namespace",
                APIVersion: "v1",
            },
    
            ObjectMeta: v1.ObjectMeta{
                Name: "test",
            },
        }
    
        e := json.NewYAMLSerializer(json.DefaultMetaFactory, nil, nil)
    
        err := e.EncodeToStream(ns, os.Stdout)
        if err != nil {
            panic(err)
        }
    }
    

    This might not be the best practice (better suggestions welcome), but it does the job.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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