如何从.kube/config中设置的当前上下文中获取名称空间 [英] How to get namespace from current-context set in .kube/config
问题描述
我正在尝试以编程方式从〜/.kube/config中获取当前上下文的名称空间Go.
I am trying to get programmatically in Go, the namespace of the current-context from ~/.kube/config.
到目前为止,我尝试过的是来自以下模块:
So far what I tried is from these modules:
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/kubernetes"
kubeconfig := filepath.Join(
os.Getenv("HOME"), ".kube", "config",
)
config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
if err != nil {
log.Fatal(err)
}
fmt.Printf("Namespace: %s\n", config.Namespace())
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
log.Fatal(err)
}
但是仍然不知道clientset是否可以给我我想要的名称空间.从这个线程: 如何获取in的当前名称空间-集群去Kubernetes客户端
But still no clue if clientset can give me the namespace I am looking for. From this thread: How to get current namespace of an in-cluster go Kubernetes client
它说了一些要做的事情: kubeconfig.Namespace()
It says something of this to be done: kubeconfig.Namespace()
推荐答案
我找到了使用NewDefaultClientConfigLoadingRules
然后加载规则的解决方案.如果您的配置可以使用默认的客户端配置加载规则进行加载,则此方法有效.
I found a solution using NewDefaultClientConfigLoadingRules
and then loading the rules. This works if your config is loadable with the default client config loading rules.
示例:
package main
import (
"github.com/davecgh/go-spew/spew"
"k8s.io/client-go/tools/clientcmd"
)
func main() {
clientCfg, err := clientcmd.NewDefaultClientConfigLoadingRules().Load()
spew.Dump(clientCfg, err)
}
为您提供 https://godoc.org/k8s.io/client-go/tools/clientcmd/api#Config ,其中包含当前上下文及其名称空间.
Gives you a https://godoc.org/k8s.io/client-go/tools/clientcmd/api#Config which contains the current context including its namespace.
Contexts: (map[string]*api.Context) (len=1) {
(string) (len=17) "xxx.xxxxx.xxx": (*api.Context)(0xc0001b2b40)({
LocationOfOrigin: (string) (len=30) "/path/to/.kube/config",
Cluster: (string) (len=17) "xxx.xxxxx.xxx",
AuthInfo: (string) (len=29) "xxxx@xxxx.com",
Namespace: (string) (len=7) "default",
Extensions: (map[string]runtime.Object) {
}
})
},
CurrentContext: (string) (len=17) "xxx.xxxxx.xxx",
供您参考,ClientConfigLoadingRules
是具有不同属性的结构,用于告诉cliclient从何处加载配置.默认值将使用KUBECONFIG
环境变量中Precedence
字段中的路径.
For your information, ClientConfigLoadingRules
is a structure with different properties to tell the cliclient where to load the config from. The default one will use the path in your KUBECONFIG
environment variable in the Precedence
field.
(*clientcmd.ClientConfigLoadingRules)(0xc0000a31d0)({
ExplicitPath: (string) "",
Precedence: ([]string) (len=1 cap=1) {
(string) (len=30) "/path/to/.kube/config"
},
MigrationRules: (map[string]string) (len=1) {
(string) (len=30) "/path/to/.kube/config": (string) (len=35) "/path/to/.kube/.kubeconfig"
},
DoNotResolvePaths: (bool) false,
DefaultClientConfig: (clientcmd.ClientConfig) <nil>
})
这篇关于如何从.kube/config中设置的当前上下文中获取名称空间的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!