英文:
Go - get server address from kubeconfig file
问题
基本上，我的kubeconfig文件包含：
apiVersion: v1
clusters:
- cluster:
server: <OAM IP地址> 这就是我想要的
(...)
我想要获取服务器地址。
之前搜索时，我找到了这个解决方案：
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
panic(err.Error())
}
// 创建clientset
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
panic(err.Error())
}
nodes, err := clientset.CoreV1().Nodes().List(metav1.ListOptions{})
if err != nil {
panic(err)
}
nodeip := []corev1.NodeAddress{}
for i := 0; i < len(nodes.Items); i++ {
nodeip = nodes.Items[i].Status.Addresses
fmt.Println(nodeip[0].Address)
}
fmt.Println(nodes.Items[0].Status.Addresses)
但它给我返回的是内部IP，而不是OAM服务器IP（它在Kubernetes配置文件中）。
英文:
Basically, my kubeconfig file has:
apiVersion: v1
clusters:
- cluster:
server: <OAM ip address> this is what I want
(...)
I want to get the server address.
Previously searching , I've found this solution:
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
panic(err.Error())
}
// creates the clientset
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
panic(err.Error())
}
nodes, err := clientset.CoreV1().Nodes().List(metav1.ListOptions{})
if err != nil {
panic(err)
}
nodeip := []corev1.NodeAddress{}
for i := 0; i < len(nodes.Items); i++ {
nodeip = nodes.Items[i].Status.Addresses
fmt.Println(nodeip[0].Address)
}
fmt.Println(nodes.Items[0].Status.Addresses)
But it gives me the Internal IP, not the OAM server IP (which is inside the Kubernetes config file)
答案1
得分: 1
如果你想从kubeconfig文件中获取服务器地址，只需从你的config变量中读取即可：
package main
import (
"flag"
"fmt"
"path/filepath"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/util/homedir"
)
func main() {
var kubeconfig *string
if home := homedir.HomeDir(); home != "" {
kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
} else {
kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
}
flag.Parse()
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
panic(err)
}
fmt.Printf("server: %s\n", config.Host)
}
如果你想知道rest.Config对象上还有哪些可用字段，一个快速的解决方案是使用%+v格式说明符打印出config变量：
fmt.Printf("%+v\n", config)
更多详细信息，请参考参考文档。
英文:
If you want the server address from the kubeconfig file, just read it from your config variable:
package main
import (
"flag"
"fmt"
"path/filepath"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/util/homedir"
)
func main() {
var kubeconfig *string
if home := homedir.HomeDir(); home != "" {
kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
} else {
kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
}
flag.Parse()
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
panic(err)
}
fmt.Printf("server: %s\n", config.Host)
}
If you're curious what other fields are available on the rest.Config object, a quick solution is to print out the config variable using the %+v format specifier:
fmt.Printf("%+v\n", config)
For more details, look at the reference documentation.
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