Resolve the helm templates

Resolving the helm templates for each of the apps
in the compositeApp by utilizing the helm libraries
and thus getting the sorted templates with all values
rendered.
This is a subtask of adding instantiation APIs.

Issue-ID: MULTICLOUD-1041
Signed-off-by: Rajamohan Raj <rajamohan.raj@intel.com>
Change-Id: Id4fddda69b5276b2409d835723b11367400ab6ea

1 files changed, 143 insertions, 0 deletions

diff --git a/src/orchestrator/pkg/module/instantiation.go b/src/orchestrator/pkg/module/instantiation.go
new file mode 100644
index 00000000..3c704181
--- /dev/null
+++ b/src/orchestrator/pkg/module/instantiation.go
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2020 Intel Corporation, Inc
+ *
+ * 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 module
+
+import (
+	"fmt"
+	"github.com/onap/multicloud-k8s/src/orchestrator/utils/helm"
+
+	"github.com/onap/multicloud-k8s/src/orchestrator/utils/types"
+	pkgerrors "github.com/pkg/errors"
+
+	"encoding/base64"
+	"log"
+)
+
+// ManifestFileName is the name given to the manifest file in the profile package
+const ManifestFileName = "manifest.yaml"
+
+// InstantiationClient implements the InstantiationManager
+type InstantiationClient struct {
+	storeName   string
+	tagMetaData string
+}
+
+// InstantiationManager is an interface which exposes the
+// InstantiationManager functionalities
+type InstantiationManager interface {
+	//ApproveInstantiation(p string, ca string, v string, di string) (error)
+	Instantiate(p string, ca string, v string, di string) error
+}
+
+// NewInstantiationClient returns an instance of InstantiationClient
+func NewInstantiationClient() *InstantiationClient {
+	return &InstantiationClient{
+		storeName:   "orchestrator",
+		tagMetaData: "instantiation",
+	}
+}
+
+// TODO
+//ApproveInstantiation approves an instantiation
+// func (c InstantiationClient) ApproveInstantiation(p string, ca string, v string, di string) (error){
+// }
+
+func getOverrideValuesByAppName(ov []OverrideValues, a string) map[string]string {
+	for _, eachOverrideVal := range ov {
+		if eachOverrideVal.AppName == a {
+			return eachOverrideVal.ValuesObj
+		}
+	}
+	return map[string]string{}
+}
+
+// GetSortedTemplateForApp returns the sorted templates.
+//It takes in arguments - appName, project, compositeAppName, releaseName, compositeProfileName, array of override values
+func GetSortedTemplateForApp(appName, p, ca, v, rName, cp string, overrideValues []OverrideValues) ([]types.KubernetesResourceTemplate, error) {
+
+	log.Println("Processing App.. ", appName)
+
+	var sortedTemplates []types.KubernetesResourceTemplate
+
+	aC, err := NewAppClient().GetAppContent(appName, p, ca, v)
+	if err != nil {
+		return sortedTemplates, pkgerrors.Wrap(err, fmt.Sprint("Not finding the content of app:: ", appName))
+	}
+	appContent, err := base64.StdEncoding.DecodeString(aC.FileContent)
+	if err != nil {
+		return sortedTemplates, pkgerrors.Wrap(err, "Fail to convert to byte array")
+	}
+	log.Println("Got the app content..")
+
+	appPC, err := NewAppProfileClient().GetAppProfileContentByApp(p, ca, v, cp, appName)
+	if err != nil {
+		return sortedTemplates, pkgerrors.Wrap(err, fmt.Sprintf("Not finding the appProfileContent for:: %s", appName))
+	}
+	appProfileContent, err := base64.StdEncoding.DecodeString(appPC.Profile)
+	if err != nil {
+		return sortedTemplates, pkgerrors.Wrap(err, "Fail to convert to byte array")
+	}
+
+	log.Println("Got the app Profile content ...")
+
+	overrideValuesOfApp := getOverrideValuesByAppName(overrideValues, appName)
+	//Convert override values from map to array of strings of the following format
+	//foo=bar
+	overrideValuesOfAppStr := []string{}
+	if overrideValuesOfApp != nil {
+		for k, v := range overrideValuesOfApp {
+			overrideValuesOfAppStr = append(overrideValuesOfAppStr, k+"="+v)
+		}
+	}
+
+	sortedTemplates, err = helm.NewTemplateClient("", "default", rName,
+		ManifestFileName).Resolve(appContent,
+		appProfileContent, overrideValuesOfAppStr,
+		rName, appName)
+
+	log.Printf("The len of the sortedTemplates :: %d", len(sortedTemplates))
+
+	return sortedTemplates, err
+}
+
+// Instantiate methods takes in project
+func (c InstantiationClient) Instantiate(p string, ca string, v string, di string) error {
+
+	dIGrp, err := NewDeploymentIntentGroupClient().GetDeploymentIntentGroup(di, p, ca, v)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Not finding the deploymentIntentGroup")
+	}
+	rName := dIGrp.Spec.Version //rName is releaseName
+	overrideValues := dIGrp.Spec.OverrideValuesObj
+	cp := dIGrp.Spec.Profile
+
+	log.Printf("dIGrp :: %s, releaseName :: %s and cp :: %s \n", dIGrp.MetaData.Name, rName, cp)
+	allApps, err := NewAppClient().GetApps(p, ca, v)
+	if err != nil {
+		return pkgerrors.Wrap(err, "Not finding the apps")
+	}
+	for _, eachApp := range allApps {
+		sortedTemplates, err := GetSortedTemplateForApp(eachApp.Metadata.Name, p, ca, v, rName, cp, overrideValues)
+		if err != nil {
+			return pkgerrors.Wrap(err, "Unable to get the sorted templates for app")
+		}
+		log.Printf("Resolved all the templates for app :: %s under the compositeApp...", eachApp.Metadata.Name)
+		log.Printf("sortedTemplates :: %v ", sortedTemplates)
+	}
+	log.Printf("Done with instantiation...")
+	return err
+}