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>

4 files changed, 889 insertions, 0 deletions

diff --git a/src/k8splugin/api/api.go b/src/k8splugin/api/api.go
new file mode 100644
index 00000000..651d9311
--- /dev/null
+++ b/src/k8splugin/api/api.go
@@ -0,0 +1,120 @@
+/*
+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 api
+
+import (
+	"os"
+	"path/filepath"
+	"plugin"
+	"strings"
+
+	"github.com/gorilla/mux"
+	pkgerrors "github.com/pkg/errors"
+
+	"k8splugin/db"
+	"k8splugin/krd"
+)
+
+// CheckEnvVariables checks for required Environment variables
+func CheckEnvVariables() error {
+	envList := []string{"CSAR_DIR", "KUBE_CONFIG_DIR", "DATABASE_TYPE", "DATABASE_IP"}
+	for _, env := range envList {
+		if _, ok := os.LookupEnv(env); !ok {
+			return pkgerrors.New("environment variable " + env + " not set")
+		}
+	}
+
+	return nil
+}
+
+// CheckDatabaseConnection checks if the database is up and running and
+// plugin can talk to it
+func CheckDatabaseConnection() error {
+	err := db.CreateDBClient(os.Getenv("DATABASE_TYPE"))
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	err = db.DBconn.InitializeDatabase()
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	err = db.DBconn.CheckDatabase()
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+	return nil
+}
+
+// LoadPlugins loads all the compiled .so plugins
+func LoadPlugins() error {
+	pluginsDir, ok := os.LookupEnv("PLUGINS_DIR")
+	if !ok {
+		pluginsDir, _ = filepath.Abs(filepath.Dir(os.Args[0]))
+	}
+	err := filepath.Walk(pluginsDir,
+		func(path string, info os.FileInfo, err error) error {
+			if strings.Contains(path, ".so") {
+				p, err := plugin.Open(path)
+				if err != nil {
+					return pkgerrors.Cause(err)
+				}
+
+				krd.LoadedPlugins[info.Name()[:len(info.Name())-3]] = p
+			}
+			return err
+		})
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// CheckInitialSettings is used to check initial settings required to start api
+func CheckInitialSettings() error {
+	err := CheckEnvVariables()
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	err = CheckDatabaseConnection()
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	err = LoadPlugins()
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	return nil
+}
+
+// NewRouter creates a router instance that serves the VNFInstance web methods
+func NewRouter(kubeconfig string) *mux.Router {
+	router := mux.NewRouter()
+
+	vnfInstanceHandler := router.PathPrefix("/v1/vnf_instances").Subrouter()
+	vnfInstanceHandler.HandleFunc("/", CreateHandler).Methods("POST").Name("VNFCreation")
+	vnfInstanceHandler.HandleFunc("/{cloudRegionID}/{namespace}", ListHandler).Methods("GET")
+	vnfInstanceHandler.HandleFunc("/{cloudRegionID}/{namespace}/{externalVNFID}", DeleteHandler).Methods("DELETE")
+	vnfInstanceHandler.HandleFunc("/{cloudRegionID}/{namespace}/{externalVNFID}", GetHandler).Methods("GET")
+
+	// (TODO): Fix update method
+	// vnfInstanceHandler.HandleFunc("/{vnfInstanceId}", UpdateHandler).Methods("PUT")
+
+	return router
+}
diff --git a/src/k8splugin/api/handler.go b/src/k8splugin/api/handler.go
new file mode 100644
index 00000000..27d060aa
--- /dev/null
+++ b/src/k8splugin/api/handler.go
@@ -0,0 +1,377 @@
+/*
+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 api
+
+import (
+	"encoding/json"
+	"errors"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/gorilla/mux"
+	pkgerrors "github.com/pkg/errors"
+	"k8s.io/client-go/kubernetes"
+
+	"k8splugin/csar"
+	"k8splugin/db"
+	"k8splugin/krd"
+)
+
+// GetVNFClient retrieves the client used to communicate with a Kubernetes Cluster
+var GetVNFClient = func(kubeConfigPath string) (kubernetes.Clientset, error) {
+	client, err := krd.GetKubeClient(kubeConfigPath)
+	if err != nil {
+		return client, err
+	}
+	return client, nil
+}
+
+func validateBody(body interface{}) error {
+	switch b := body.(type) {
+	case CreateVnfRequest:
+		if b.CloudRegionID == "" {
+			werr := pkgerrors.Wrap(errors.New("Invalid/Missing CloudRegionID in POST request"), "CreateVnfRequest bad request")
+			return werr
+		}
+		if b.CsarID == "" {
+			werr := pkgerrors.Wrap(errors.New("Invalid/Missing CsarID in POST request"), "CreateVnfRequest bad request")
+			return werr
+		}
+		if strings.Contains(b.CloudRegionID, "|") || strings.Contains(b.Namespace, "|") {
+			werr := pkgerrors.Wrap(errors.New("Character \"|\" not allowed in CSAR ID"), "CreateVnfRequest bad request")
+			return werr
+		}
+	case UpdateVnfRequest:
+		if b.CloudRegionID == "" || b.CsarID == "" {
+			werr := pkgerrors.Wrap(errors.New("Invalid/Missing Data in PUT request"), "UpdateVnfRequest bad request")
+			return werr
+		}
+	}
+	return nil
+}
+
+// CreateHandler is the POST method creates a new VNF instance resource.
+func CreateHandler(w http.ResponseWriter, r *http.Request) {
+	var resource CreateVnfRequest
+
+	if r.Body == nil {
+		http.Error(w, "Body empty", http.StatusBadRequest)
+		return
+	}
+
+	err := json.NewDecoder(r.Body).Decode(&resource)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+		return
+	}
+
+	err = validateBody(resource)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+		return
+	}
+
+	// (TODO): Read kubeconfig for specific Cloud Region from local file system
+	// if present or download it from AAI
+	// err := DownloadKubeConfigFromAAI(resource.CloudRegionID, os.Getenv("KUBE_CONFIG_DIR")
+	kubeclient, err := GetVNFClient(os.Getenv("KUBE_CONFIG_DIR") + "/" + resource.CloudRegionID)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	/*
+		uuid,
+		{
+			"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
+			"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
+		},
+		nil
+	*/
+	externalVNFID, resourceNameMap, err := csar.CreateVNF(resource.CsarID, resource.CloudRegionID, resource.Namespace, &kubeclient)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Read Kubernetes Data information error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// cloud1-default-uuid
+	internalVNFID := resource.CloudRegionID + "-" + resource.Namespace + "-" + externalVNFID
+
+	// Persist in AAI database.
+	log.Printf("Cloud Region ID: %s, Namespace: %s, VNF ID: %s ", resource.CloudRegionID, resource.Namespace, externalVNFID)
+
+	// TODO: Uncomment when annotations are done
+	// krd.AddNetworkAnnotationsToPod(kubeData, resource.Networks)
+
+	// "{"deployment":<>,"service":<>}"
+	out, err := json.Marshal(resourceNameMap)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Create VNF deployment error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+	serializedResourceNameMap := string(out)
+
+	// key: cloud1-default-uuid
+	// value: "{"deployment":<>,"service":<>}"
+	err = db.DBconn.CreateEntry(internalVNFID, serializedResourceNameMap)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Create VNF deployment error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	resp := CreateVnfResponse{
+		VNFID:         externalVNFID,
+		CloudRegionID: resource.CloudRegionID,
+		Namespace:     resource.Namespace,
+		VNFComponents: resourceNameMap,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusCreated)
+	json.NewEncoder(w).Encode(resp)
+}
+
+// ListHandler the existing VNF instances created in a given Kubernetes cluster
+func ListHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	cloudRegionID := vars["cloudRegionID"]
+	namespace := vars["namespace"]
+	prefix := cloudRegionID + "-" + namespace
+
+	internalVNFIDs, err := db.DBconn.ReadAll(prefix)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Get VNF list error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	if len(internalVNFIDs) == 0 {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+
+	// TODO: There is an edge case where if namespace is passed but is missing some characters
+	// trailing, it will print the result with those excluding characters. This is because of
+	// the way I am trimming the Prefix. This fix is needed.
+
+	var editedList []string
+
+	for _, id := range internalVNFIDs {
+		if len(id) > 0 {
+			editedList = append(editedList, strings.TrimPrefix(id, prefix)[1:])
+		}
+	}
+
+	if len(editedList) == 0 {
+		editedList = append(editedList, "")
+	}
+
+	resp := ListVnfsResponse{
+		VNFs: editedList,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(resp)
+}
+
+// DeleteHandler method terminates an individual VNF instance.
+func DeleteHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	cloudRegionID := vars["cloudRegionID"] // cloud1
+	namespace := vars["namespace"]         // default
+	externalVNFID := vars["externalVNFID"] // uuid
+
+	// cloud1-default-uuid
+	internalVNFID := cloudRegionID + "-" + namespace + "-" + externalVNFID
+
+	// (TODO): Read kubeconfig for specific Cloud Region from local file system
+	// if present or download it from AAI
+	// err := DownloadKubeConfigFromAAI(resource.CloudRegionID, os.Getenv("KUBE_CONFIG_DIR")
+	kubeclient, err := GetVNFClient(os.Getenv("KUBE_CONFIG_DIR") + "/" + cloudRegionID)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// key: cloud1-default-uuid
+	// value: "{"deployment":<>,"service":<>}"
+	serializedResourceNameMap, found, err := db.DBconn.ReadEntry(internalVNFID)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	if found == false {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+
+	/*
+		{
+			"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
+			"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
+		},
+	*/
+	deserializedResourceNameMap := make(map[string][]string)
+	err = json.Unmarshal([]byte(serializedResourceNameMap), &deserializedResourceNameMap)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Delete VNF error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	err = csar.DestroyVNF(deserializedResourceNameMap, namespace, &kubeclient)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Delete VNF error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	err = db.DBconn.DeleteEntry(internalVNFID)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Delete VNF error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusAccepted)
+}
+
+// // UpdateHandler method to update a VNF instance.
+// func UpdateHandler(w http.ResponseWriter, r *http.Request) {
+// 	vars := mux.Vars(r)
+// 	id := vars["vnfInstanceId"]
+
+// 	var resource UpdateVnfRequest
+
+// 	if r.Body == nil {
+// 		http.Error(w, "Body empty", http.StatusBadRequest)
+// 		return
+// 	}
+
+// 	err := json.NewDecoder(r.Body).Decode(&resource)
+// 	if err != nil {
+// 		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+// 		return
+// 	}
+
+// 	err = validateBody(resource)
+// 	if err != nil {
+// 		http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+// 		return
+// 	}
+
+// 	kubeData, err := utils.ReadCSARFromFileSystem(resource.CsarID)
+
+// 	if kubeData.Deployment == nil {
+// 		werr := pkgerrors.Wrap(err, "Update VNF deployment error")
+// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
+// 		return
+// 	}
+// 	kubeData.Deployment.SetUID(types.UID(id))
+
+// 	if err != nil {
+// 		werr := pkgerrors.Wrap(err, "Update VNF deployment information error")
+// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
+// 		return
+// 	}
+
+// 	// (TODO): Read kubeconfig for specific Cloud Region from local file system
+// 	// if present or download it from AAI
+// 	s, err := NewVNFInstanceService("../kubeconfig/config")
+// 	if err != nil {
+// 		http.Error(w, err.Error(), http.StatusInternalServerError)
+// 		return
+// 	}
+
+// 	err = s.Client.UpdateDeployment(kubeData.Deployment, resource.Namespace)
+// 	if err != nil {
+// 		werr := pkgerrors.Wrap(err, "Update VNF error")
+
+// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
+// 		return
+// 	}
+
+// 	resp := UpdateVnfResponse{
+// 		DeploymentID: id,
+// 	}
+
+// 	w.Header().Set("Content-Type", "application/json")
+// 	w.WriteHeader(http.StatusCreated)
+
+// 	err = json.NewEncoder(w).Encode(resp)
+// 	if err != nil {
+// 		werr := pkgerrors.Wrap(err, "Parsing output of new VNF error")
+// 		http.Error(w, werr.Error(), http.StatusInternalServerError)
+// 	}
+// }
+
+// GetHandler retrieves information about a VNF instance by reading an individual VNF instance resource.
+func GetHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	cloudRegionID := vars["cloudRegionID"] // cloud1
+	namespace := vars["namespace"]         // default
+	externalVNFID := vars["externalVNFID"] // uuid
+
+	// cloud1-default-uuid
+	internalVNFID := cloudRegionID + "-" + namespace + "-" + externalVNFID
+
+	// key: cloud1-default-uuid
+	// value: "{"deployment":<>,"service":<>}"
+	serializedResourceNameMap, found, err := db.DBconn.ReadEntry(internalVNFID)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	if found == false {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+
+	/*
+		{
+			"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
+			"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
+		},
+	*/
+	deserializedResourceNameMap := make(map[string][]string)
+	err = json.Unmarshal([]byte(serializedResourceNameMap), &deserializedResourceNameMap)
+	if err != nil {
+		werr := pkgerrors.Wrap(err, "Get VNF error")
+		http.Error(w, werr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	resp := GetVnfResponse{
+		VNFID:         externalVNFID,
+		CloudRegionID: cloudRegionID,
+		Namespace:     namespace,
+		VNFComponents: deserializedResourceNameMap,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(resp)
+}
diff --git a/src/k8splugin/api/handler_test.go b/src/k8splugin/api/handler_test.go
new file mode 100644
index 00000000..df573d94
--- /dev/null
+++ b/src/k8splugin/api/handler_test.go
@@ -0,0 +1,316 @@
+/*
+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 api
+
+import (
+	"bytes"
+	"encoding/json"
+	"k8s.io/client-go/kubernetes"
+	"net/http"
+	"net/http/httptest"
+	"reflect"
+	"testing"
+
+	"k8splugin/csar"
+	"k8splugin/db"
+)
+
+type mockDB struct {
+	db.DatabaseConnection
+}
+
+func (c *mockDB) InitializeDatabase() error {
+	return nil
+}
+
+func (c *mockDB) CheckDatabase() error {
+	return nil
+}
+
+func (c *mockDB) CreateEntry(key string, value string) error {
+	return nil
+}
+
+func (c *mockDB) ReadEntry(key string) (string, bool, error) {
+	str := "{\"deployment\":[\"cloud1-default-uuid-sisedeploy\"],\"service\":[\"cloud1-default-uuid-sisesvc\"]}"
+	return str, true, nil
+}
+
+func (c *mockDB) DeleteEntry(key string) error {
+	return nil
+}
+
+func (c *mockDB) ReadAll(key string) ([]string, error) {
+	returnVal := []string{"cloud1-default-uuid1", "cloud1-default-uuid2"}
+	return returnVal, nil
+}
+
+func executeRequest(req *http.Request) *httptest.ResponseRecorder {
+	router := NewRouter("")
+	recorder := httptest.NewRecorder()
+	router.ServeHTTP(recorder, req)
+
+	return recorder
+}
+
+func checkResponseCode(t *testing.T, expected, actual int) {
+	if expected != actual {
+		t.Errorf("Expected response code %d. Got %d\n", expected, actual)
+	}
+}
+
+func TestVNFInstanceCreation(t *testing.T) {
+	t.Run("Succesful create a VNF", func(t *testing.T) {
+		payload := []byte(`{
+			"cloud_region_id": "region1",
+			"namespace": "test",
+			"csar_id": "UUID-1",
+			"oof_parameters": [{
+				"key1": "value1",
+				"key2": "value2",
+				"key3": {}
+			}],
+			"network_parameters": {
+				"oam_ip_address": {
+					"connection_point": "string",
+					"ip_address": "string",
+					"workload_name": "string"
+				}
+			}
+		}`)
+
+		data := map[string][]string{
+			"deployment": []string{"cloud1-default-uuid-sisedeploy"},
+			"service":    []string{"cloud1-default-uuid-sisesvc"},
+		}
+
+		expected := &CreateVnfResponse{
+			VNFID:         "test_UUID",
+			CloudRegionID: "region1",
+			Namespace:     "test",
+			VNFComponents: data,
+		}
+
+		var result CreateVnfResponse
+
+		req, _ := http.NewRequest("POST", "/v1/vnf_instances/", bytes.NewBuffer(payload))
+
+		GetVNFClient = func(configPath string) (kubernetes.Clientset, error) {
+			return kubernetes.Clientset{}, nil
+		}
+
+		csar.CreateVNF = func(id string, r string, n string, kubeclient *kubernetes.Clientset) (string, map[string][]string, error) {
+			return "externaluuid", data, nil
+		}
+
+		db.DBconn = &mockDB{}
+
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusCreated, response.Code)
+
+		err := json.NewDecoder(response.Body).Decode(&result)
+		if err != nil {
+			t.Fatalf("TestVNFInstanceCreation returned:\n result=%v\n expected=%v", err, expected.VNFComponents)
+		}
+	})
+	t.Run("Missing body failure", func(t *testing.T) {
+		req, _ := http.NewRequest("POST", "/v1/vnf_instances/", nil)
+		response := executeRequest(req)
+
+		checkResponseCode(t, http.StatusBadRequest, response.Code)
+	})
+	t.Run("Invalid JSON request format", func(t *testing.T) {
+		payload := []byte("invalid")
+		req, _ := http.NewRequest("POST", "/v1/vnf_instances/", bytes.NewBuffer(payload))
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusUnprocessableEntity, response.Code)
+	})
+	t.Run("Missing parameter failure", func(t *testing.T) {
+		payload := []byte(`{
+			"csar_id": "testID",
+			"oof_parameters": {
+				"key_values": {
+					"key1": "value1",
+					"key2": "value2"
+				}
+			},
+			"vnf_instance_name": "test",
+			"vnf_instance_description": "vRouter_test_description"
+		}`)
+		req, _ := http.NewRequest("POST", "/v1/vnf_instances/", bytes.NewBuffer(payload))
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusUnprocessableEntity, response.Code)
+	})
+}
+
+func TestVNFInstancesRetrieval(t *testing.T) {
+	t.Run("Succesful get a list of VNF", func(t *testing.T) {
+		expected := &ListVnfsResponse{
+			VNFs: []string{"uuid1", "uuid2"},
+		}
+		var result ListVnfsResponse
+
+		req, _ := http.NewRequest("GET", "/v1/vnf_instances/cloud1/default", nil)
+
+		db.DBconn = &mockDB{}
+
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusOK, response.Code)
+
+		err := json.NewDecoder(response.Body).Decode(&result)
+		if err != nil {
+			t.Fatalf("TestVNFInstancesRetrieval returned:\n result=%v\n expected=list", err)
+		}
+		if !reflect.DeepEqual(*expected, result) {
+			t.Fatalf("TestVNFInstancesRetrieval returned:\n result=%v\n expected=%v", result, *expected)
+		}
+	})
+	t.Run("Get empty list", func(t *testing.T) {
+		req, _ := http.NewRequest("GET", "/v1/vnf_instances/cloudregion1/testnamespace", nil)
+		db.DBconn = &mockDB{}
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusOK, response.Code)
+	})
+}
+
+func TestVNFInstanceDeletion(t *testing.T) {
+	t.Run("Succesful delete a VNF", func(t *testing.T) {
+		req, _ := http.NewRequest("DELETE", "/v1/vnf_instances/cloudregion1/testnamespace/1", nil)
+
+		GetVNFClient = func(configPath string) (kubernetes.Clientset, error) {
+			return kubernetes.Clientset{}, nil
+		}
+
+		csar.DestroyVNF = func(d map[string][]string, n string, kubeclient *kubernetes.Clientset) error {
+			return nil
+		}
+
+		db.DBconn = &mockDB{}
+
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusAccepted, response.Code)
+
+		if result := response.Body.String(); result != "" {
+			t.Fatalf("TestVNFInstanceDeletion returned:\n result=%v\n expected=%v", result, "")
+		}
+	})
+	// t.Run("Malformed delete request", func(t *testing.T) {
+	// 	req, _ := http.NewRequest("DELETE", "/v1/vnf_instances/foo", nil)
+	// 	response := executeRqequest(req)
+	// 	checkResponseCode(t, http.StatusBadRequest, response.Code)
+	// })
+}
+
+// TODO: Update this test when the UpdateVNF endpoint is fixed.
+/*
+func TestVNFInstanceUpdate(t *testing.T) {
+	t.Run("Succesful update a VNF", func(t *testing.T) {
+		payload := []byte(`{
+			"cloud_region_id": "region1",
+			"csar_id": "UUID-1",
+			"oof_parameters": [{
+				"key1": "value1",
+				"key2": "value2",
+				"key3": {}
+			}],
+			"network_parameters": {
+				"oam_ip_address": {
+					"connection_point": "string",
+					"ip_address": "string",
+					"workload_name": "string"
+				}
+			}
+		}`)
+		expected := &UpdateVnfResponse{
+			DeploymentID: "1",
+		}
+
+		var result UpdateVnfResponse
+
+		req, _ := http.NewRequest("PUT", "/v1/vnf_instances/1", bytes.NewBuffer(payload))
+
+		GetVNFClient = func(configPath string) (krd.VNFInstanceClientInterface, error) {
+			return &mockClient{
+				update: func() error {
+					return nil
+				},
+			}, nil
+		}
+		utils.ReadCSARFromFileSystem = func(csarID string) (*krd.KubernetesData, error) {
+			kubeData := &krd.KubernetesData{
+				Deployment: &appsV1.Deployment{},
+				Service:    &coreV1.Service{},
+			}
+			return kubeData, nil
+		}
+
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusCreated, response.Code)
+
+		err := json.NewDecoder(response.Body).Decode(&result)
+		if err != nil {
+			t.Fatalf("TestVNFInstanceUpdate returned:\n result=%v\n expected=%v", err, expected.DeploymentID)
+		}
+
+		if result.DeploymentID != expected.DeploymentID {
+			t.Fatalf("TestVNFInstanceUpdate returned:\n result=%v\n expected=%v", result.DeploymentID, expected.DeploymentID)
+		}
+	})
+}
+*/
+
+func TestVNFInstanceRetrieval(t *testing.T) {
+	t.Run("Succesful get a VNF", func(t *testing.T) {
+
+		data := map[string][]string{
+			"deployment": []string{"cloud1-default-uuid-sisedeploy"},
+			"service":    []string{"cloud1-default-uuid-sisesvc"},
+		}
+
+		expected := GetVnfResponse{
+			VNFID:         "1",
+			CloudRegionID: "cloud1",
+			Namespace:     "default",
+			VNFComponents: data,
+		}
+
+		req, _ := http.NewRequest("GET", "/v1/vnf_instances/cloud1/default/1", nil)
+
+		GetVNFClient = func(configPath string) (kubernetes.Clientset, error) {
+			return kubernetes.Clientset{}, nil
+		}
+
+		db.DBconn = &mockDB{}
+
+		response := executeRequest(req)
+		checkResponseCode(t, http.StatusOK, response.Code)
+
+		var result GetVnfResponse
+
+		err := json.NewDecoder(response.Body).Decode(&result)
+		if err != nil {
+			t.Fatalf("TestVNFInstanceRetrieval returned:\n result=%v\n expected=%v", err, expected)
+		}
+
+		if !reflect.DeepEqual(expected, result) {
+			t.Fatalf("TestVNFInstanceRetrieval returned:\n result=%v\n expected=%v", result, expected)
+		}
+	})
+	t.Run("VNF not found", func(t *testing.T) {
+		req, _ := http.NewRequest("GET", "/v1/vnf_instances/cloudregion1/testnamespace/1", nil)
+		response := executeRequest(req)
+
+		checkResponseCode(t, http.StatusOK, response.Code)
+	})
+}
diff --git a/src/k8splugin/api/model.go b/src/k8splugin/api/model.go
new file mode 100644
index 00000000..0e4863c4
--- /dev/null
+++ b/src/k8splugin/api/model.go
@@ -0,0 +1,76 @@
+/*
+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 api
+
+// CreateVnfRequest contains the VNF creation request parameters
+type CreateVnfRequest struct {
+	CloudRegionID string                   `json:"cloud_region_id"`
+	CsarID        string                   `json:"csar_id"`
+	OOFParams     []map[string]interface{} `json:"oof_parameters"`
+	NetworkParams NetworkParameters        `json:"network_parameters"`
+	Namespace     string                   `json:"namespace"`
+	Name          string                   `json:"vnf_instance_name"`
+	Description   string                   `json:"vnf_instance_description"`
+}
+
+// CreateVnfResponse contains the VNF creation response parameters
+type CreateVnfResponse struct {
+	VNFID         string              `json:"vnf_id"`
+	CloudRegionID string              `json:"cloud_region_id"`
+	Namespace     string              `json:"namespace"`
+	VNFComponents map[string][]string `json:"vnf_components"`
+}
+
+// ListVnfsResponse contains the list of VNFs response parameters
+type ListVnfsResponse struct {
+	VNFs []string `json:"vnf_id_list"`
+}
+
+// NetworkParameters contains the networking info required by the VNF instance
+type NetworkParameters struct {
+	OAMI OAMIPParams `json:"oam_ip_address"`
+	// Add other network parameters if necessary.
+}
+
+// OAMIPParams contains the management networking info required by the VNF instance
+type OAMIPParams struct {
+	ConnectionPoint string `json:"connection_point"`
+	IPAddress       string `json:"ip_address"`
+	WorkLoadName    string `json:"workload_name"`
+}
+
+// UpdateVnfRequest contains the VNF creation parameters
+type UpdateVnfRequest struct {
+	CloudRegionID string                   `json:"cloud_region_id"`
+	CsarID        string                   `json:"csar_id"`
+	OOFParams     []map[string]interface{} `json:"oof_parameters"`
+	NetworkParams NetworkParameters        `json:"network_parameters"`
+	Namespace     string                   `json:"namespace"`
+	Name          string                   `json:"vnf_instance_name"`
+	Description   string                   `json:"vnf_instance_description"`
+}
+
+// UpdateVnfResponse contains the VNF update response parameters
+type UpdateVnfResponse struct {
+	DeploymentID string `json:"vnf_id"`
+	Name         string `json:"name"`
+}
+
+// GetVnfResponse returns information about a specific VNF instance
+type GetVnfResponse struct {
+	VNFID         string              `json:"vnf_id"`
+	CloudRegionID string              `json:"cloud_region_id"`
+	Namespace     string              `json:"namespace"`
+	VNFComponents map[string][]string `json:"vnf_components"`
+}