生成Kubernetes类型的YAML清单文件。

huangapple
go评论118阅读模式
英文:

Generate YAML manifest from Kubernetes types

问题

我正在研究编写一个工具，用于为我们的项目以编程方式生成 Kubernetes 定义。

我发现 Kubernetes 中的 API 类型可以在 k8s.io/kubernetes/pkg/api 中找到。我想根据这些类型输出 YAML。

给定这样一个对象：

  1. ns := &api.Namespace{
  2.     ObjectMeta: api.ObjectMeta{
  3.         Name: "test",
  4.     },
  5. }

生成符合 kubectl create 预期的 YAML 输出的最佳方法是什么？

英文:

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:

  1. ns := &api.Namespace{
  2.     ObjectMeta: api.ObjectMeta{
  3.         Name: "test",
  4.     },
  5. }

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

答案1

得分: 2

找到了，供参考，以下是你可能想要做的：

  1. package main
  3. import (
  4. 	"os"
  6. 	"k8s.io/kubernetes/pkg/api/unversioned"
  7. 	"k8s.io/kubernetes/pkg/api/v1"
  8. 	"k8s.io/kubernetes/pkg/runtime/serializer/json"
  9. )
  11. func main() {
  12. 	ns := &v1.Namespace{
  13. 		TypeMeta: unversioned.TypeMeta{
  14. 			Kind:       "Namespace",
  15. 			APIVersion: "v1",
  16. 		},
  18. 		ObjectMeta: v1.ObjectMeta{
  19. 			Name: "test",
  20. 		},
  21. 	}
  23. 	e := json.NewYAMLSerializer(json.DefaultMetaFactory, nil, nil)
  25. 	err := e.EncodeToStream(ns, os.Stdout)
  26. 	if err != nil {
  27. 		panic(err)
  28. 	}
  29. }

这可能不是最佳实践（欢迎提出更好的建议），但它能完成工作。

英文:

Found it, for future reference, here's what you might want to do:

  1. package main
  3. import (
  4. 	"os"
  6. 	"k8s.io/kubernetes/pkg/api/unversioned"
  7. 	"k8s.io/kubernetes/pkg/api/v1"
  8. 	"k8s.io/kubernetes/pkg/runtime/serializer/json"
  9. )
  11. func main() {
  12. 	ns := &v1.Namespace{
  13. 		TypeMeta: unversioned.TypeMeta{
  14. 			Kind:       "Namespace",
  15. 			APIVersion: "v1",
  16. 		},
  18. 		ObjectMeta: v1.ObjectMeta{
  19. 			Name: "test",
  20. 		},
  21. 	}
  23. 	e := json.NewYAMLSerializer(json.DefaultMetaFactory, nil, nil)
  25. 	err := e.EncodeToStream(ns, os.Stdout)
  26. 	if err != nil {
  27. 		panic(err)
  28. 	}
  29. }

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

答案2

得分: 2

他们的API已经更新了，所以现在看起来是这样的：

  1. import k8sJson "k8s.io/apimachinery/pkg/runtime/serializer/json"
  2. ...
  3. serializer := k8sJson.NewSerializerWithOptions(
  4. 	k8sJson.DefaultMetaFactory, nil, nil,
  5. 	k8sJson.SerializerOptions{
  6. 		Yaml:   true,
  7. 		Pretty: true,
  8. 		Strict: true,
  9. 	},
  10. )
英文:

Their API has updated, so this is how it looks like:

  1. import k8sJson "k8s.io/apimachinery/pkg/runtime/serializer/json"
  2. ...
  3. serializer := k8sJson.NewSerializerWithOptions(
  4. 	k8sJson.DefaultMetaFactory, nil, nil,
  5. 	k8sJson.SerializerOptions{
  6. 		Yaml:   true,
  7. 		Pretty: true,
  8. 		Strict: true,
  9. 	},
  10. )

答案3

得分: 1

  1. package main
  3. import (
  4. 	"os"
  6. 	v1 "k8s.io/api/core/v1"
  7. 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  8. 	"k8s.io/apimachinery/pkg/runtime/serializer/json"
  9. )
  11. func main() {
  12. 	ns := &v1.Namespace{
  13. 		TypeMeta: metav1.TypeMeta{
  14. 			Kind:       "Namespace",
  15. 			APIVersion: "v1",
  16. 		},
  18. 		ObjectMeta: metav1.ObjectMeta{
  19. 			Name: "test",
  20. 		},
  21. 	}
  23. 	e := json.NewYAMLSerializer(json.DefaultMetaFactory, nil, nil)
  25. 	//err := e.EncodeToStream(ns, os.Stdout)
  26. 	err := e.Encode(ns, os.Stdout)
  27. 	if err != nil {
  28. 		panic(err)
  29. 	}
  30. }
英文: 
  1. package main
  3. import (
  4. 	"os"
  6. 	v1 "k8s.io/api/core/v1"
  7. 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  8. 	"k8s.io/apimachinery/pkg/runtime/serializer/json"
  9. )
  11. func main() {
  12. 	ns := &v1.Namespace{
  13. 		TypeMeta: metav1.TypeMeta{
  14. 			Kind:       "Namespace",
  15. 			APIVersion: "v1",
  16. 		},
  18. 		ObjectMeta: metav1.ObjectMeta{
  19. 			Name: "test",
  20. 		},
  21. 	}
  23. 	e := json.NewYAMLSerializer(json.DefaultMetaFactory, nil, nil)
  25. 	//err := e.EncodeToStream(ns, os.Stdout)
  26. 	err := e.Encode(ns, os.Stdout)
  27. 	if err != nil {
  28. 		panic(err)
  29. 	}
  30. }

huangapple
  • 本文由 发表于 2016年1月27日 18:59:45
  • 转载请务必保留本文链接：https://go.coder-hub.com/35035464.html
  • go
  • kubernetes
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