我使用Golang client-go库在REST GET、POST级别与Kubernetes API服务器通信,收到的响应不是格式良好的JSON结构,也不是“kind”API对象。
程序片段为:
kubeconfig := filepath.Join(
os.Getenv("HOME"), ".kube", "config",
)
config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
if err != nil {
log.Fatal(err)
}
config.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
groupVersion, _ := schema.ParseGroupVersion("api/v1")
config.GroupVersion = &groupVersion
config.ContentType = "application/json"
config.AcceptContentTypes = "application/json"
exampleRestClient, err := rest.RESTClientFor(config)
if err != nil {
panic(err)
}
var statusCode int
var contentType string
response, err := exampleRestClient.
Get().
Resource("nodes").
Do(context.Background()).
StatusCode(&statusCode).
ContentType(&contentType).
Get()
if err != nil {
panic(err)
}
fmt.Printf("Content-type is %s\n", contentType)
fmt.Printf("Status Code is %d\n", statusCode)
fmt.Printf("Received response %v\n", response)
响应开始为:
Status Code is 200
Received response &NodeList{ListMeta:{ 17299 <nil>},Items:[]Node{Node{ObjectMeta:{dev-cluster-control-plane 7fe038c9-8be6-41a9-9f3f-5900abb0e34b 16922 0 2023-02-19 16:32:44 +0530 IST <nil> <nil> map[beta.kubernetes.io/arch:amd64 beta.kubernetes.io/os:linux kubernetes.io/arch:amd64 kubernetes.io/hostname:dev-cluster-control-plane kubernetes.io/os:linux node-role.kubernetes.io/control-plane: node.kubernetes.io/exclude-from-external-load-balancers:] map[kubeadm.alpha.kubernetes.io/cri-socket:unix:///run/containerd/containerd.sock node.alpha.kubernetes.io/ttl:0 volumes.kubernetes.io/controller-managed-attach-detach:true] [] [] ...
我希望输出与以下命令返回的内容类似:
$ kubectl get --raw /api/v1/nodes
{"kind":"NodeList","apiVersion":"v1","metadata":{"resourceVersion":"17481"},"items":[{"metadata":{"name":"dev-cluster-control-plane","uid":"7fe038c9-8be6-41a9-9f3f-5900abb0e34b","resourceVersion":"17351","creationTimestamp":"2023-02-19T11:02:44Z","labels":{"beta.kubernetes.io/arch":"amd64","beta.kubernetes.io/os":"linux","kubernetes.io/arch":"amd64","kubernetes.io/hostname":"dev-cluster-control-plane","kubernetes.io/os":"linux","node-role.kubernetes.io/control-plane":"","node.kubernetes.io/exclude-from-external-load-balancers":""},"annotations":{"kubeadm.alpha.kubernetes.io/cri-socket":"unix:///run/containerd/containerd.sock","node.alpha.kubernetes.io/ttl":"0" ...
1条答案
按热度按时间xdnvmnnf1#
收到的响应不是格式正确的JSON结构
我想您对
client-go
模块的操作方式感到困惑。来自REST API的响应绝对是一个格式良好的JSON响应,但它被解组到Go语言的数据结构中(如下图所示)。
如果想访问返回的节点,可以使用标准Go语言语法与结果交互:
我希望输出与以下命令返回的内容类似:
为什么?
client-go
绑定返回的数据对Go语言代码很有用,如果你想生成JSON输出,你需要显式地将资源封送为JSON格式: