从 k8s 解析 yaml 配置映射数据

Question

我正在使用以下代码来获取 k8s config map 数据。

这段代码可以正常工作，但是我不确定解组，是否有点冗长，是否有可靠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 data
var cmData map[string]string
e = yaml.Unmarshal([]byte(cm.Data["cm1.yaml"]), &cmData)
if err != nil{
  return errors.New(“error “occurred”)
}

//here i need to read rzr field
appVersion := strings.ReplaceAll(cmData[“rzr”], ".", "-")

这是配置图vs-manifest

apiVersion: v1
kind: ConfigMap
metadata:
  name: vs-manifest
  namespace: ns1
data:
  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")
  }

}