Seed code for k8s multicloud plugin

This patch provides the initial seed code for the multicloud Kubernetes
plugin and also provides the plugin feature to add new Kubernetes
kinds.

Change-Id: Ie5ee414656665070cde2834c4855ac2ebc179a9a
Issue-ID: MULTICLOUD-301
Signed-off-by: Shashank Kumar Shankar <shashank.kumar.shankar@intel.com>
Signed-off-by: Victor Morales <victor.morales@intel.com>

3 files changed, 122 insertions, 0 deletions

diff --git a/src/k8splugin/krd/krd.go b/src/k8splugin/krd/krd.go
new file mode 100644
index 00000000..2d06e104
--- /dev/null
+++ b/src/k8splugin/krd/krd.go
@@ -0,0 +1,44 @@
+/*
+Copyright 2018 Intel Corporation.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package krd
+
+import (
+	"errors"
+
+	pkgerrors "github.com/pkg/errors"
+
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+// GetKubeClient loads the Kubernetes configuation values stored into the local configuration file
+var GetKubeClient = func(configPath string) (kubernetes.Clientset, error) {
+	var clientset *kubernetes.Clientset
+
+	if configPath == "" {
+		return *clientset, errors.New("config not passed and is not found in ~/.kube. ")
+	}
+
+	config, err := clientcmd.BuildConfigFromFlags("", configPath)
+	if err != nil {
+		return kubernetes.Clientset{}, pkgerrors.Wrap(err, "setConfig: Build config from flags raised an error")
+	}
+
+	clientset, err = kubernetes.NewForConfig(config)
+	if err != nil {
+		return *clientset, err
+	}
+
+	return *clientset, nil
+}
diff --git a/src/k8splugin/krd/krd_test.go b/src/k8splugin/krd/krd_test.go
new file mode 100644
index 00000000..7047a74c
--- /dev/null
+++ b/src/k8splugin/krd/krd_test.go
@@ -0,0 +1,34 @@
+/*
+Copyright 2018 Intel Corporation.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package krd
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestGetKubeClient(t *testing.T) {
+	t.Run("Successfully create Kube Client", func(t *testing.T) {
+
+		clientset, err := GetKubeClient("../mock_files/mock_configs/mock_config")
+		if err != nil {
+			t.Fatalf("TestGetKubeClient returned an error (%s)", err)
+		}
+
+		if reflect.TypeOf(clientset).Name() != "Clientset" {
+			t.Fatalf("TestGetKubeClient returned :\n result=%v\n expected=%v", clientset, "Clientset")
+		}
+
+	})
+}
diff --git a/src/k8splugin/krd/plugins.go b/src/k8splugin/krd/plugins.go
new file mode 100644
index 00000000..612e3f6b
--- /dev/null
+++ b/src/k8splugin/krd/plugins.go
@@ -0,0 +1,44 @@
+/*
+Copyright 2018 Intel Corporation.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package krd
+
+import (
+	"plugin"
+
+	appsV1 "k8s.io/api/apps/v1"
+	coreV1 "k8s.io/api/core/v1"
+	"k8s.io/client-go/kubernetes"
+)
+
+// LoadedPlugins stores references to the stored plugins
+var LoadedPlugins = map[string]*plugin.Plugin{}
+
+// KubeResourceClient has the signature methods to create Kubernetes reources
+type KubeResourceClient interface {
+	CreateResource(GenericKubeResourceData, *kubernetes.Clientset) (string, error)
+	ListResources(string, string) (*[]string, error)
+	DeleteResource(string, string, *kubernetes.Clientset) error
+	GetResource(string, string, *kubernetes.Clientset) (string, error)
+}
+
+// GenericKubeResourceData stores all supported Kubernetes plugin types
+type GenericKubeResourceData struct {
+	YamlFilePath  string
+	Namespace     string
+	InternalVNFID string
+
+	// Add additional Kubernetes plugins below kinds
+	DeploymentData *appsV1.Deployment
+	ServiceData    *coreV1.Service
+}