Please open an issue on the client-go repo and link the blog post this came
from.
On Mon, May 14, 2018 at 5:34 AM <holger.prot...@springer.com> wrote:
> Hello, I tried to follow the example of the blog post for the Polymorphic
> scale client, but it fails with:
>
> `panic: unable to get client for StatefulSet.apps: unable to get full
> preferred group-version-resource for StatefulSet.apps: the cache has not
> been filled yet`
>
> ```
> package main
>
> import (
> "flag"
> "fmt"
> "log"
> "os"
> "path/filepath"
>
> "k8s.io/client-go/kubernetes"
> "k8s.io/client-go/tools/clientcmd"
> _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
> "k8s.io/client-go/discovery"
> "k8s.io/client-go/scale"
> "k8s.io/client-go/dynamic"
> "k8s.io/apimachinery/pkg/runtime/schema"
> discocache "k8s.io/client-go/discovery/cached"
> apimeta "k8s.io/apimachinery/pkg/api/meta"
> "k8s.io/client-go/scale/scheme/appsv1beta1"
> )
>
> func main() {
> var ns string
> flag.StringVar(&ns, "namespace", "", "namespace")
>
> // Bootstrap k8s configuration from local Kubernetes config
> file
> kubeconfig := filepath.Join(os.Getenv("HOME"), ".kube", "config")
> log.Println("Using kubeconfig file: ", kubeconfig)
> config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
> if err != nil {
> log.Fatal(err)
> }
>
> // Create an rest client not targeting specific API version
> clientset, err := kubernetes.NewForConfig(config)
> if err != nil {
> log.Fatal(err)
> }
>
> cachedDiscovery :=
> discocache.NewMemCacheClient(clientset.Discovery())
> cachedDiscovery.Fresh()
> restMapper :=
> discovery.NewDeferredDiscoveryRESTMapper(cachedDiscovery,
> apimeta.InterfacesForUnstructured)
> scaleKindResolver :=
> scale.NewDiscoveryScaleKindResolver(clientset.Discovery())
> scaleClient, err := scale.NewForConfig(config, restMapper,
> dynamic.LegacyAPIPathResolverFunc, scaleKindResolver)
>
> scale, err := scaleClient.Scales("default").Get(
> schema.GroupResource{Group: appsv1beta1.GroupName,
> Resource: "StatefulSet"}, "worker")
> if err != nil {
> panic(err.Error())
> }
>
> fmt.Println(scale.Status)
> }
> ```
>
> Not sure whats the problem here? It's because the empty cache, or is my
> GroupResource wrong?
>
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