/
client.go
155 lines (143 loc) · 4.66 KB
/
client.go
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package frameworkext
import (
"bytes"
"context"
"io"
"os"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/cli-runtime/pkg/resource"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/restmapper"
"sigs.k8s.io/e2e-framework/klient/decoder"
"sigs.k8s.io/e2e-framework/klient/k8s"
)
// ApplyFiles creates Kubernetes objects contained in manifest file(s), in a manner similar to `kubectl apply -f`
// Multiple objects may be in each manifest file.
// The manifest files are processed in order.
func ApplyFiles(restConfig *rest.Config, manifestFiles ...string) error {
for _, manifestFile := range manifestFiles {
if f, err := os.Open(manifestFile); err != nil {
return err
} else if err := applyManifests(restConfig, f); err != nil {
return err
}
}
return nil
}
// ApplyManifests creates Kubernetes objects contained in manifests, in a manner similar to `kubectl apply -f`
// Multiple objects may be in the manifest data.
func ApplyManifests(restConfig *rest.Config, manifests ...[]byte) error {
return applyManifests(restConfig, bytesSlicesToReaders(manifests...)...)
}
func applyManifests(restConfig *rest.Config, manifests ...io.Reader) error {
for _, manifest := range manifests {
if objs, err := decoder.DecodeAll(context.TODO(), manifest); err != nil {
return err
} else if err := processObjects(restConfig, objs, func(client *resource.Helper, obj k8s.Object) error {
namespace, err := meta.NewAccessor().Namespace(obj)
if err != nil {
return err
}
if namespace == "" {
namespace = "default"
}
_, err = client.Create(namespace, false, obj)
return err
}); err != nil {
return err
}
}
return nil
}
// DeleteFiles deletes Kubernetes objects contained in manifest file(s), in a manner similar to `kubectl delete -f`
// Multiple objects may be in each manifest file.
func DeleteFiles(restConfig *rest.Config, manifestFiles ...string) error {
for _, manifestFile := range manifestFiles {
if f, err := os.Open(manifestFile); err != nil {
return err
} else if err := deleteManifests(restConfig, f); err != nil {
return err
}
}
return nil
}
// DeleteManifests deletes Kubernetes objects contained in manifest(s), in a manner similar to `kubectl delete -f`
// Multiple objects may be in each manifest.
func DeleteManifests(restConfig *rest.Config, manifests ...[]byte) error {
return deleteManifests(restConfig, bytesSlicesToReaders(manifests...)...)
}
func deleteManifests(restConfig *rest.Config, manifests ...io.Reader) error {
for _, manifest := range manifests {
if objs, err := decoder.DecodeAll(context.TODO(), manifest); err != nil {
return err
} else if err := processObjects(restConfig, objs, func(client *resource.Helper, obj k8s.Object) error {
name, err := meta.NewAccessor().Name(obj)
if err != nil {
return err
}
namespace, err := meta.NewAccessor().Namespace(obj)
if err != nil {
return err
}
if namespace == "" {
namespace = "default"
}
_, err = client.Delete(namespace, name)
return err
}); err != nil {
return err
}
}
return nil
}
func bytesSlicesToReaders(byteSlices ...[]byte) []io.Reader {
var readers []io.Reader
for _, b := range byteSlices {
readers = append(readers, bytes.NewReader(b))
}
return readers
}
// processObjects applies a processFunc to each object, supplying it a dynamically-typed client appropriate for the object
func processObjects(restConfig *rest.Config, objs []k8s.Object, processFunc func(client *resource.Helper, obj k8s.Object) error) error {
clientset, err := kubernetes.NewForConfig(restConfig)
if err != nil {
return err
}
groupResources, err := restmapper.GetAPIGroupResources(clientset.Discovery())
if err != nil {
return err
}
rm := restmapper.NewDiscoveryRESTMapper(groupResources)
for _, obj := range objs {
client, err := newResourceHelper(restConfig, rm, obj)
if err != nil {
return err
}
processFunc(client, obj)
}
return nil
}
func newResourceHelper(restConfig *rest.Config, rm meta.RESTMapper, obj runtime.Object) (*resource.Helper, error) {
gvk := obj.GetObjectKind().GroupVersionKind()
gk := schema.GroupKind{Group: gvk.Group, Kind: gvk.Kind}
mapping, err := rm.RESTMapping(gk, gvk.Version)
if err != nil {
return nil, err
}
gv := mapping.GroupVersionKind.GroupVersion()
restConfig.ContentConfig = resource.UnstructuredPlusDefaultContentConfig()
restConfig.GroupVersion = &gv
if len(gv.Group) == 0 {
restConfig.APIPath = "/api"
} else {
restConfig.APIPath = "/apis"
}
restClient, err := rest.RESTClientFor(restConfig)
if err != nil {
return nil, err
}
return resource.NewHelper(restClient, mapping), nil
}