解析来自 k8s 的 yaml 配置映射数据

Question

我使用以下代码获取 k8s 配置映射数据。这个代码正在工作，但是我不确定关于unmarshal，它是否有点冗长，是否有一种强大的方法来实现这一点？cm, e := c.Kubernetes.CoreV1().ConfigMaps(“ns1”).Get(“vs-manifest”, metav1.GetOptions{})if e != nil {    return errors.New(“error “occurred”)}//here I want to get the datavar cmData map[string]stringe = yaml.Unmarshal([]byte(cm.Data["cm1.yaml"]), &cmData)if err != nil{  return errors.New(“error “occurred”)}//here i need to read rzr fieldappVersion := strings.ReplaceAll(cmData[“rzr”], ".", "-")这是配置映射vs-manifestapiVersion: v1kind: ConfigMapmetadata:  name: vs-manifest  namespace: ns1data:  cm1.yaml: |    version: 1.5    repo: milestones    rzr: 1.0005.044

Answer 1

一些修改建议：

// Once you have the configMap, check whether cm1.yaml file exist or not?

var cmFile string 

if value, ok:= cm.Data["cm1.yaml"]; ok {

  cmFile = value

}

// while unmarshal-ing yaml files, use map[string]interface

// otherwise error may occur.

// Case:

//| a:

//|   b: value

//|   c: 

//|     d: value2

cmData := make(map[string]interface{})

err := yaml.Unmarshal([]byte(cmFile), cmData)

if err != nil {

  return errors.New("error occurred")

}

var apiVersion string

// Check whether the "rzr" exist or not

if value, ok := cmData["rzr"]; ok {

  // convert the value from interface to string

  // using type assertion.

  stringValue, valid := value.(string)

  // if successfully converted to string

  if valid {

    apiVersion = strings.ReplaceAll(stringValue, ".", "-")

  } else {

    return errors.New("failed to convert")

  }

}