Use a standard Go project layout

This project wasn't following some Standard Go Project Layout
guidelines(https://github.com/golang-standards/project-layout). This
change pretends to organize the source code and following those
guidelines.

Change-Id: I61085ac20f28069cede013f83034bed06892d87c
Signed-off-by: Victor Morales <victor.morales@intel.com>
Issue-ID: MULTICLOUD-301

4 files changed, 409 insertions, 0 deletions

diff --git a/src/k8splugin/internal/app/client.go b/src/k8splugin/internal/app/client.go
new file mode 100644
index 00000000..3555afdd
--- /dev/null
+++ b/src/k8splugin/internal/app/client.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 app
+
+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/internal/app/client_test.go b/src/k8splugin/internal/app/client_test.go
new file mode 100644
index 00000000..9d892633
--- /dev/null
+++ b/src/k8splugin/internal/app/client_test.go
@@ -0,0 +1,36 @@
+// +build unit
+
+/*
+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 app
+
+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/internal/app/vnfhelper.go b/src/k8splugin/internal/app/vnfhelper.go
new file mode 100644
index 00000000..3deb9f21
--- /dev/null
+++ b/src/k8splugin/internal/app/vnfhelper.go
@@ -0,0 +1,196 @@
+/*
+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 app
+
+import (
+	"encoding/hex"
+	"io/ioutil"
+	"log"
+	"math/rand"
+	"os"
+
+	"k8s.io/client-go/kubernetes"
+
+	pkgerrors "github.com/pkg/errors"
+	yaml "gopkg.in/yaml.v2"
+
+	utils "k8splugin/internal"
+)
+
+func generateExternalVNFID() string {
+	b := make([]byte, 2)
+	rand.Read(b)
+	return hex.EncodeToString(b)
+}
+
+func ensuresNamespace(namespace string, kubeclient kubernetes.Interface) error {
+	namespacePlugin, ok := utils.LoadedPlugins["namespace"]
+	if !ok {
+		return pkgerrors.New("No plugin for namespace resource found")
+	}
+
+	symGetNamespaceFunc, err := namespacePlugin.Lookup("Get")
+	if err != nil {
+		return pkgerrors.Wrap(err, "Error fetching get namespace function")
+	}
+
+	ns, err := symGetNamespaceFunc.(func(string, string, kubernetes.Interface) (string, error))(
+		namespace, namespace, kubeclient)
+	if err != nil {
+		return pkgerrors.Wrap(err, "An error ocurred during the get namespace execution")
+	}
+
+	if ns == "" {
+		log.Println("Creating " + namespace + " namespace")
+		symGetNamespaceFunc, err := namespacePlugin.Lookup("Create")
+		if err != nil {
+			return pkgerrors.Wrap(err, "Error fetching create namespace plugin")
+		}
+		namespaceResource := &utils.ResourceData{
+			Namespace: namespace,
+		}
+
+		_, err = symGetNamespaceFunc.(func(*utils.ResourceData, kubernetes.Interface) (string, error))(
+			namespaceResource, kubeclient)
+		if err != nil {
+			return pkgerrors.Wrap(err, "Error creating "+namespace+" namespace")
+		}
+	}
+	return nil
+}
+
+// CreateVNF reads the CSAR files from the files system and creates them one by one
+var CreateVNF = func(csarID string, cloudRegionID string, namespace string, kubeclient *kubernetes.Clientset) (string, map[string][]string, error) {
+	if err := ensuresNamespace(namespace, kubeclient); err != nil {
+		return "", nil, pkgerrors.Wrap(err, "Error while ensuring namespace: "+namespace)
+	}
+	externalVNFID := generateExternalVNFID()
+	internalVNFID := cloudRegionID + "-" + namespace + "-" + externalVNFID
+
+	csarDirPath := os.Getenv("CSAR_DIR") + "/" + csarID
+	metadataYAMLPath := csarDirPath + "/metadata.yaml"
+
+	log.Println("Reading " + metadataYAMLPath + " file")
+	metadataFile, err := ReadMetadataFile(metadataYAMLPath)
+	if err != nil {
+		return "", nil, pkgerrors.Wrap(err, "Error while reading Metadata File: "+metadataYAMLPath)
+	}
+
+	var path string
+	resourceYAMLNameMap := make(map[string][]string)
+	// Iterates over the resources defined in the metadata file to create kubernetes resources
+	log.Println(string(len(metadataFile.ResourceTypePathMap)) + " resource(s) type(s) to be processed")
+	for resource, fileNames := range metadataFile.ResourceTypePathMap {
+		log.Println("Processing items of " + string(resource) + " resource")
+		var resourcesCreated []string
+		for _, filename := range fileNames {
+			path = csarDirPath + "/" + filename
+
+			if _, err := os.Stat(path); os.IsNotExist(err) {
+				return "", nil, pkgerrors.New("File " + path + "does not exists")
+			}
+			log.Println("Processing file: " + path)
+
+			genericKubeData := &utils.ResourceData{
+				YamlFilePath: path,
+				Namespace:    namespace,
+				VnfId:        internalVNFID,
+			}
+
+			typePlugin, ok := utils.LoadedPlugins[resource]
+			if !ok {
+				return "", nil, pkgerrors.New("No plugin for resource " + resource + " found")
+			}
+
+			symCreateResourceFunc, err := typePlugin.Lookup("Create")
+			if err != nil {
+				return "", nil, pkgerrors.Wrap(err, "Error fetching "+resource+" plugin")
+			}
+
+			internalResourceName, err := symCreateResourceFunc.(func(*utils.ResourceData, kubernetes.Interface) (string, error))(
+				genericKubeData, kubeclient)
+			if err != nil {
+				return "", nil, pkgerrors.Wrap(err, "Error in plugin "+resource+" plugin")
+			}
+			log.Print(internalResourceName + " succesful resource created")
+			resourcesCreated = append(resourcesCreated, internalResourceName)
+		}
+		resourceYAMLNameMap[resource] = resourcesCreated
+	}
+
+	return externalVNFID, resourceYAMLNameMap, nil
+}
+
+// DestroyVNF deletes VNFs based on data passed
+var DestroyVNF = func(data map[string][]string, namespace string, kubeclient *kubernetes.Clientset) error {
+	/* data:
+	{
+		"deployment": ["cloud1-default-uuid-sisedeploy1", "cloud1-default-uuid-sisedeploy2", ... ]
+		"service": ["cloud1-default-uuid-sisesvc1", "cloud1-default-uuid-sisesvc2", ... ]
+	},
+	*/
+
+	for resourceName, resourceList := range data {
+		typePlugin, ok := utils.LoadedPlugins[resourceName]
+		if !ok {
+			return pkgerrors.New("No plugin for resource " + resourceName + " found")
+		}
+
+		symDeleteResourceFunc, err := typePlugin.Lookup("Delete")
+		if err != nil {
+			return pkgerrors.Wrap(err, "Error fetching "+resourceName+" plugin")
+		}
+
+		for _, resourceName := range resourceList {
+
+			log.Println("Deleting resource: " + resourceName)
+
+			err = symDeleteResourceFunc.(func(string, string, kubernetes.Interface) error)(
+				resourceName, namespace, kubeclient)
+			if err != nil {
+				return pkgerrors.Wrap(err, "Error destroying "+resourceName)
+			}
+		}
+	}
+
+	return nil
+}
+
+// MetadataFile stores the metadata of execution
+type MetadataFile struct {
+	ResourceTypePathMap map[string][]string `yaml:"resources"`
+}
+
+// ReadMetadataFile reads the metadata yaml to return the order or reads
+var ReadMetadataFile = func(path string) (MetadataFile, error) {
+	var metadataFile MetadataFile
+
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		return metadataFile, pkgerrors.Wrap(err, "Metadata YAML file does not exist")
+	}
+
+	log.Println("Reading metadata YAML: " + path)
+	yamlFile, err := ioutil.ReadFile(path)
+	if err != nil {
+		return metadataFile, pkgerrors.Wrap(err, "Metadata YAML file read error")
+	}
+
+	err = yaml.Unmarshal(yamlFile, &metadataFile)
+	if err != nil {
+		return metadataFile, pkgerrors.Wrap(err, "Metadata YAML file unmarshal error")
+	}
+	log.Printf("metadata:\n%v", metadataFile)
+
+	return metadataFile, nil
+}
diff --git a/src/k8splugin/internal/app/vnfhelper_test.go b/src/k8splugin/internal/app/vnfhelper_test.go
new file mode 100644
index 00000000..81bea627
--- /dev/null
+++ b/src/k8splugin/internal/app/vnfhelper_test.go
@@ -0,0 +1,133 @@
+// +build integration
+
+/*
+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 app
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+	"plugin"
+	"testing"
+
+	yaml "gopkg.in/yaml.v2"
+	"k8s.io/client-go/kubernetes"
+
+	pkgerrors "github.com/pkg/errors"
+
+	utils "k8splugin/internal"
+)
+
+func LoadMockPlugins(krdLoadedPlugins *map[string]*plugin.Plugin) error {
+	if _, err := os.Stat("../../mock_files/mock_plugins/mockplugin.so"); os.IsNotExist(err) {
+		return pkgerrors.New("mockplugin.so does not exist. Please compile mockplugin.go to generate")
+	}
+
+	mockPlugin, err := plugin.Open("../../mock_files/mock_plugins/mockplugin.so")
+	if err != nil {
+		return pkgerrors.Cause(err)
+	}
+
+	(*krdLoadedPlugins)["namespace"] = mockPlugin
+	(*krdLoadedPlugins)["deployment"] = mockPlugin
+	(*krdLoadedPlugins)["service"] = mockPlugin
+
+	return nil
+}
+
+func TestCreateVNF(t *testing.T) {
+	oldkrdPluginData := utils.LoadedPlugins
+	oldReadMetadataFile := ReadMetadataFile
+
+	defer func() {
+		utils.LoadedPlugins = oldkrdPluginData
+		ReadMetadataFile = oldReadMetadataFile
+	}()
+
+	err := LoadMockPlugins(&utils.LoadedPlugins)
+	if err != nil {
+		t.Fatalf("TestCreateVNF returned an error (%s)", err)
+	}
+
+	ReadMetadataFile = func(yamlFilePath string) (MetadataFile, error) {
+		var seqFile MetadataFile
+
+		if _, err := os.Stat(yamlFilePath); err == nil {
+			rawBytes, err := ioutil.ReadFile("../../mock_files/mock_yamls/metadata.yaml")
+			if err != nil {
+				return seqFile, pkgerrors.Wrap(err, "Metadata YAML file read error")
+			}
+
+			err = yaml.Unmarshal(rawBytes, &seqFile)
+			if err != nil {
+				return seqFile, pkgerrors.Wrap(err, "Metadata YAML file unmarshall error")
+			}
+		}
+
+		return seqFile, nil
+	}
+
+	kubeclient := kubernetes.Clientset{}
+
+	t.Run("Successfully create VNF", func(t *testing.T) {
+		externaluuid, data, err := CreateVNF("uuid", "cloudregion1", "test", &kubeclient)
+		if err != nil {
+			t.Fatalf("TestCreateVNF returned an error (%s)", err)
+		}
+
+		log.Println(externaluuid)
+
+		if data == nil {
+			t.Fatalf("TestCreateVNF returned empty data (%s)", data)
+		}
+	})
+
+}
+
+func TestDeleteVNF(t *testing.T) {
+	oldkrdPluginData := utils.LoadedPlugins
+
+	defer func() {
+		utils.LoadedPlugins = oldkrdPluginData
+	}()
+
+	err := LoadMockPlugins(&utils.LoadedPlugins)
+	if err != nil {
+		t.Fatalf("TestCreateVNF returned an error (%s)", err)
+	}
+
+	kubeclient := kubernetes.Clientset{}
+
+	t.Run("Successfully delete VNF", func(t *testing.T) {
+		data := map[string][]string{
+			"deployment": []string{"cloud1-default-uuid-sisedeploy"},
+			"service":    []string{"cloud1-default-uuid-sisesvc"},
+		}
+
+		err := DestroyVNF(data, "test", &kubeclient)
+		if err != nil {
+			t.Fatalf("TestCreateVNF returned an error (%s)", err)
+		}
+	})
+}
+
+func TestReadMetadataFile(t *testing.T) {
+	t.Run("Successfully read Metadata YAML file", func(t *testing.T) {
+		_, err := ReadMetadataFile("../../mock_files//mock_yamls/metadata.yaml")
+		if err != nil {
+			t.Fatalf("TestReadMetadataFile returned an error (%s)", err)
+		}
+	})
+}