// Namespace implements KubeConfig
func (config DirectClientConfig) Namespace() (string, error) {
if err := config.ConfirmUsable(); err != nil {
return "", err
}
configContext := config.getContext()
if len(configContext.Namespace) != 0 {
return configContext.Namespace, nil
}
if len(configContext.NamespacePath) != 0 {
nsInfo, err := kubectl.LoadNamespaceInfo(configContext.NamespacePath)
if err != nil {
return "", err
}
return nsInfo.Namespace, nil
}
// if nothing was specified, try the default file
nsInfo, err := kubectl.LoadNamespaceInfo(os.Getenv("HOME") + "/.kubernetes_ns")
if err != nil {
return "", err
}
return nsInfo.Namespace, nil
}
func NewCmdNamespace(out io.Writer) *cobra.Command {
cmd := &cobra.Command{
Use: "namespace [<namespace>]",
Short: "Set and view the current Kubernetes namespace",
Long: `Set and view the current Kubernetes namespace scope for command line requests.
A Kubernetes namespace subdivides the cluster into groups of logically related pods, services, and replication controllers.
Examples:
$ kubectl namespace
Using namespace default
$ kubectl namespace other
Set current namespace to other`,
Run: func(cmd *cobra.Command, args []string) {
nsPath := GetFlagString(cmd, "ns-path")
var err error
var ns *kubectl.NamespaceInfo
switch len(args) {
case 0:
ns, err = kubectl.LoadNamespaceInfo(nsPath)
fmt.Printf("Using namespace %s\n", ns.Namespace)
case 1:
ns = &kubectl.NamespaceInfo{Namespace: args[0]}
err = kubectl.SaveNamespaceInfo(nsPath, ns)
fmt.Printf("Set current namespace to %s\n", ns.Namespace)
default:
usageError(cmd, "kubectl namespace [<namespace>]")
}
checkErr(err)
},
}
return cmd
}
func getKubeNamespace(cmd *cobra.Command) string {
result := api.NamespaceDefault
if ns := GetFlagString(cmd, "namespace"); len(ns) > 0 {
result = ns
glog.V(2).Infof("Using namespace from -ns flag")
} else {
nsPath := GetFlagString(cmd, "ns-path")
nsInfo, err := kubectl.LoadNamespaceInfo(nsPath)
if err != nil {
glog.Fatalf("Error loading current namespace: %v", err)
}
result = nsInfo.Namespace
}
glog.V(2).Infof("Using namespace %s", result)
return result
}