/
remoteCluster.go
123 lines (104 loc) · 3.86 KB
/
remoteCluster.go
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package stub
import (
"fmt"
"github.com/operator-framework/operator-sdk/pkg/sdk/types"
"github.com/operator-framework/operator-sdk/pkg/util/k8sutil"
"github.com/sirupsen/logrus"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/discovery"
"k8s.io/client-go/discovery/cached"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
)
type RemoteClusterSDK struct {
kubeConfig *rest.Config
cluster *RemoteCluster
clientPool dynamic.ClientPool
restMapper *discovery.DeferredDiscoveryRESTMapper
}
func (r *RemoteClusterSDK) Create(object types.Object, log *logrus.Entry) (err error) {
_, namespace, err := k8sutil.GetNameAndNamespace(object)
if err != nil {
log.Errorf("Failed to get namespace: %v", err)
return err
}
gvk := object.GetObjectKind().GroupVersionKind()
apiVersion, kind := gvk.ToAPIVersionAndKind()
resourceClient, _, err := r.getRemoteResourceClient(apiVersion, kind, namespace)
if err != nil {
return fmt.Errorf("failed to get resource client: %v", err)
}
unstructObj := k8sutil.UnstructuredFromRuntimeObject(object)
unstructObj, err = resourceClient.Create(unstructObj)
if err != nil {
//log.Errorf("Failed to create object: %v", err)
return err
}
// Update the arg object with the result
err = k8sutil.UnstructuredIntoRuntimeObject(unstructObj, object)
if err != nil {
return fmt.Errorf("failed to unmarshal the retrieved data: %v", err)
}
return nil
}
func newRemoteClusterSDK(cluster *RemoteCluster, log *logrus.Entry) (*RemoteClusterSDK, error) {
tlsClientConfig := rest.TLSClientConfig{}
tlsClientConfig.CAData = []byte(cluster.MasterAuth.ClusterCaCertificate)
tlsClientConfig.CertData = []byte(cluster.MasterAuth.ClientCertificate)
tlsClientConfig.KeyData = []byte(cluster.MasterAuth.ClientKey)
kubeConfig := &rest.Config{
Host: cluster.Endpoint,
TLSClientConfig: tlsClientConfig,
Username: cluster.MasterAuth.Username,
Password: cluster.MasterAuth.Password,
}
kubeClient := kubernetes.NewForConfigOrDie(kubeConfig)
cachedDiscoveryClient := cached.NewMemCacheClient(kubeClient.Discovery())
restMapper := discovery.NewDeferredDiscoveryRESTMapper(cachedDiscoveryClient, meta.InterfacesForUnstructured)
restMapper.Reset()
kubeConfig.ContentConfig = dynamic.ContentConfig()
clientPool := dynamic.NewClientPool(kubeConfig, restMapper, dynamic.LegacyAPIPathResolverFunc)
return &RemoteClusterSDK{
kubeConfig: kubeConfig,
clientPool: clientPool,
cluster: cluster,
restMapper: restMapper,
}, nil
}
func apiResource(gvk schema.GroupVersionKind, restMapper *discovery.DeferredDiscoveryRESTMapper) (*v1.APIResource, error) {
mapping, err := restMapper.RESTMapping(gvk.GroupKind(), gvk.Version)
if err != nil {
return nil, fmt.Errorf("failed to get the resource REST mapping for GroupVersionKind(%s): %v", gvk.String(), err)
}
resource := &v1.APIResource{
Name: mapping.Resource,
Namespaced: mapping.Scope == meta.RESTScopeNamespace,
Kind: gvk.Kind,
}
return resource, nil
}
func (r *RemoteClusterSDK) getRemoteResourceClient(apiVersion, kind, namespace string) (dynamic.ResourceInterface, string, error) {
gv, err := schema.ParseGroupVersion(apiVersion)
if err != nil {
return nil, "", fmt.Errorf("failed to parse apiVersion: %v", err)
}
gvk := schema.GroupVersionKind{
Group: gv.Group,
Version: gv.Version,
Kind: kind,
}
client, err := r.clientPool.ClientForGroupVersionKind(gvk)
if err != nil {
return nil, "", fmt.Errorf("failed to get client for GroupVersionKind(%s): %v", gvk.String(), err)
}
resource, err := apiResource(gvk, r.restMapper)
if err != nil {
return nil, "", fmt.Errorf("failed to get resource type: %v", err)
}
pluralName := resource.Name
resourceClient := client.Resource(resource, namespace)
return resourceClient, pluralName, nil
}