Merge "Create appContext and save to etcd"

4 files changed, 338 insertions, 35 deletions

diff --git a/src/orchestrator/pkg/appcontext/appcontext.go b/src/orchestrator/pkg/appcontext/appcontext.go
index d92b1d11..8f7841ac 100644
--- a/src/orchestrator/pkg/appcontext/appcontext.go
+++ b/src/orchestrator/pkg/appcontext/appcontext.go
@@ -22,6 +22,8 @@ import (
 
 	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/rtcontext"
 	pkgerrors "github.com/pkg/errors"
+	//"log"
+	log "github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/logutils"
 )
 
 type AppContext struct {
@@ -81,6 +83,7 @@ func (ac *AppContext) AddApp(handle interface{}, appname string) (interface{}, e
 	if err != nil {
 		return nil, err
 	}
+	log.Info(":: Added app handle ::", log.Fields{"AppHandle":h})
 	return h, nil
 }
 
@@ -93,7 +96,7 @@ func (ac *AppContext) DeleteApp(handle interface{}) error {
 	return nil
 }
 
-//Returns the hanlde for a given app
+//Returns the handle for a given app
 func (ac *AppContext) GetAppHandle(appname string) (interface{}, error) {
 	if appname == "" {
 		return nil, pkgerrors.Errorf("Not a valid run time context app name")
@@ -123,6 +126,7 @@ func (ac *AppContext) AddCluster(handle interface{}, clustername string) (interf
 	if err != nil {
 		return nil, err
 	}
+	log.Info(":: Added cluster handle ::", log.Fields{"ClusterHandler":h})
 	return h, nil
 }
 
@@ -193,11 +197,13 @@ func (ac *AppContext) GetClusterNames(appname string) ([]string, error) {
 }
 
 //Add resource under app and cluster
-func (ac *AppContext) AddResource(handle interface{}, resname string, value interface{}) (interface{}, error) {
+func (ac *AppContext) AddResource(handle interface{}, resname string, value []byte) (interface{}, error) {
 	h, err := ac.rtc.RtcAddResource(handle, resname, value)
 	if err != nil {
 		return nil, err
 	}
+	log.Info(":: Added resource handle ::", log.Fields{"ResourceHandler":h})
+
 	return h, nil
 }
 
@@ -238,7 +244,7 @@ func (ac *AppContext) GetResourceHandle(appname string, clustername string, resn
 }
 
 //Update the resource value usign the given handle
-func (ac *AppContext) UpdateResourceValue(handle interface{}, value interface{}) error {
+func (ac *AppContext) UpdateResourceValue(handle interface{}, value []byte) error {
 	return ac.rtc.RtcUpdateValue(handle, value)
 }
 
@@ -254,6 +260,7 @@ func (ac *AppContext) AddInstruction(handle interface{}, level string, insttype
 	if err != nil {
 		return nil, err
 	}
+	log.Info(":: Added instruction handle ::", log.Fields{"InstructionHandler":h})
 	return h, nil
 }
 
diff --git a/src/orchestrator/pkg/gpic/gpic.go b/src/orchestrator/pkg/gpic/gpic.go
index f02e5352..256d3b41 100644
--- a/src/orchestrator/pkg/gpic/gpic.go
+++ b/src/orchestrator/pkg/gpic/gpic.go
@@ -22,14 +22,14 @@ package gpic
 */
 
 import (
-	"log"
 	ncmmodule "github.com/onap/multicloud-k8s/src/ncm/pkg/module"
 	pkgerrors "github.com/pkg/errors"
+	"log"
 )
 
 // Clusters has 1 field - a list of ClusterNames
 type Clusters struct {
-	ClustersWithName  []ClusterWithName
+	ClustersWithName []ClusterWithName
 }
 
 // ClusterWithName has two fields - ProviderName and ClusterName
@@ -82,7 +82,7 @@ func intentResolverHelper(pn, cn, cln string, clustersWithName []ClusterWithName
 		for _, eachClusterName := range clusterNamesList {
 			eachClusterWithPN := ClusterWithName{pn, eachClusterName}
 			clustersWithName = append(clustersWithName, eachClusterWithPN)
-			log.Printf("Added Cluster: %s ", cln)
+			log.Printf("Added Cluster :: %s through its label: %s ", eachClusterName, cln)
 		}
 	}
 	return clustersWithName, nil
@@ -95,13 +95,13 @@ func IntentResolver(intent IntentStruc) (Clusters, error) {
 
 	for _, eachAllOf := range intent.AllOfArray {
 		clustersWithName, err = intentResolverHelper(eachAllOf.ProviderName, eachAllOf.ClusterName, eachAllOf.ClusterLabelName, clustersWithName)
-		if err!=nil {
+		if err != nil {
 			return Clusters{}, pkgerrors.Wrap(err, "intentResolverHelper error")
 		}
 		if len(eachAllOf.AnyOfArray) > 0 {
 			for _, eachAnyOf := range eachAllOf.AnyOfArray {
 				clustersWithName, err = intentResolverHelper(eachAnyOf.ProviderName, eachAnyOf.ClusterName, eachAnyOf.ClusterLabelName, clustersWithName)
-				if err!=nil {
+				if err != nil {
 					return Clusters{}, pkgerrors.Wrap(err, "intentResolverHelper error")
 				}
 			}
@@ -110,7 +110,7 @@ func IntentResolver(intent IntentStruc) (Clusters, error) {
 	if len(intent.AnyOfArray) > 0 {
 		for _, eachAnyOf := range intent.AnyOfArray {
 			clustersWithName, err = intentResolverHelper(eachAnyOf.ProviderName, eachAnyOf.ClusterName, eachAnyOf.ClusterLabelName, clustersWithName)
-			if err!=nil {
+			if err != nil {
 				return Clusters{}, pkgerrors.Wrap(err, "intentResolverHelper error")
 			}
 		}
diff --git a/src/orchestrator/pkg/module/instantiation.go b/src/orchestrator/pkg/module/instantiation.go
index 56021547..58706ef6 100644
--- a/src/orchestrator/pkg/module/instantiation.go
+++ b/src/orchestrator/pkg/module/instantiation.go
@@ -17,15 +17,17 @@
 package module
 
 import (
+	"encoding/base64"
 	"fmt"
-
+	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/appcontext"
 	gpic "github.com/onap/multicloud-k8s/src/orchestrator/pkg/gpic"
-
-	"encoding/base64"
-
+	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/db"
+	"github.com/onap/multicloud-k8s/src/orchestrator/utils"
 	"github.com/onap/multicloud-k8s/src/orchestrator/utils/helm"
 	pkgerrors "github.com/pkg/errors"
-	"log"
+	"io/ioutil"
+	//"log"
+	log "github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/logutils"
 )
 
 // ManifestFileName is the name given to the manifest file in the profile package
@@ -34,10 +36,29 @@ const ManifestFileName = "manifest.yaml"
 // GenericPlacementIntentName denotes the generic placement intent name
 const GenericPlacementIntentName = "generic-placement-intent"
 
+// SEPARATOR used while creating clusternames to store in etcd
+const SEPARATOR = "+"
+
 // InstantiationClient implements the InstantiationManager
 type InstantiationClient struct {
-	storeName   string
-	tagMetaData string
+	db InstantiationClientDbInfo
+}
+
+/*
+InstantiationKey used in storing the contextid in the momgodb
+It consists of
+GenericPlacementIntentName,
+ProjectName,
+CompositeAppName,
+CompositeAppVersion,
+DeploymentIntentGroup
+*/
+type InstantiationKey struct {
+	IntentName            string
+	Project               string
+	CompositeApp          string
+	Version               string
+	DeploymentIntentGroup string
 }
 
 // InstantiationManager is an interface which exposes the
@@ -47,11 +68,19 @@ type InstantiationManager interface {
 	Instantiate(p string, ca string, v string, di string) error
 }
 
+// InstantiationClientDbInfo consists of storeName and tagContext
+type InstantiationClientDbInfo struct {
+	storeName  string // name of the mongodb collection to use for Instantiationclient documents
+	tagContext string // attribute key name for context object in App Context
+}
+
 // NewInstantiationClient returns an instance of InstantiationClient
 func NewInstantiationClient() *InstantiationClient {
 	return &InstantiationClient{
-		storeName:   "orchestrator",
-		tagMetaData: "instantiation",
+		db: InstantiationClientDbInfo{
+			storeName:  "orchestrator",
+			tagContext: "contextid",
+		},
 	}
 }
 
@@ -70,10 +99,10 @@ func getOverrideValuesByAppName(ov []OverrideValues, a string) map[string]string
 }
 
 /*
-FindGenericPlacementIntent takes in projectName, CompositeAppName, CompositeAppVersion, DeploymentIntentName
+findGenericPlacementIntent takes in projectName, CompositeAppName, CompositeAppVersion, DeploymentIntentName
 and returns the name of the genericPlacementIntentName. Returns empty value if string not found.
 */
-func FindGenericPlacementIntent(p, ca, v, di string) (string, error) {
+func findGenericPlacementIntent(p, ca, v, di string) (string, error) {
 	var gi string
 	var found bool
 	iList, err := NewIntentClient().GetAllIntents(p, ca, v, di)
@@ -82,7 +111,7 @@ func FindGenericPlacementIntent(p, ca, v, di string) (string, error) {
 	}
 	for _, eachMap := range iList.ListOfIntents {
 		if gi, found := eachMap[GenericPlacementIntentName]; found {
-			log.Printf("::Name of the generic-placement-intent:: %s", gi)
+			log.Info(":: Name of the generic-placement-intent ::", log.Fields{"GenPlmtIntent":gi})
 			return gi, err
 		}
 	}
@@ -97,7 +126,8 @@ func FindGenericPlacementIntent(p, ca, v, di string) (string, error) {
 //It takes in arguments - appName, project, compositeAppName, releaseName, compositeProfileName, array of override values
 func GetSortedTemplateForApp(appName, p, ca, v, rName, cp string, overrideValues []OverrideValues) ([]helm.KubernetesResourceTemplate, error) {
 
-	log.Println("Processing App.. ", appName)
+
+	log.Info(":: Processing App ::", log.Fields{"appName":appName})
 
 	var sortedTemplates []helm.KubernetesResourceTemplate
 
@@ -109,7 +139,8 @@ func GetSortedTemplateForApp(appName, p, ca, v, rName, cp string, overrideValues
 	if err != nil {
 		return sortedTemplates, pkgerrors.Wrap(err, "Fail to convert to byte array")
 	}
-	log.Println("Got the app content..")
+
+	log.Info(":: Got the app content.. ::", log.Fields{"appName":appName})
 
 	appPC, err := NewAppProfileClient().GetAppProfileContentByApp(p, ca, v, cp, appName)
 	if err != nil {
@@ -120,7 +151,7 @@ func GetSortedTemplateForApp(appName, p, ca, v, rName, cp string, overrideValues
 		return sortedTemplates, pkgerrors.Wrap(err, "Fail to convert to byte array")
 	}
 
-	log.Println("Got the app Profile content ...")
+	log.Info(":: Got the app Profile content .. ::", log.Fields{"appName":appName})
 
 	overrideValuesOfApp := getOverrideValuesByAppName(overrideValues, appName)
 	//Convert override values from map to array of strings of the following format
@@ -137,12 +168,111 @@ func GetSortedTemplateForApp(appName, p, ca, v, rName, cp string, overrideValues
 		appProfileContent, overrideValuesOfAppStr,
 		appName)
 
-	log.Printf("The len of the sortedTemplates :: %d", len(sortedTemplates))
+	log.Info(":: Total no. of sorted templates ::", log.Fields{"len(sortedTemplates):":len(sortedTemplates)})
 
 	return sortedTemplates, err
 }
 
-// Instantiate methods takes in project
+// resource consists of name of reource
+type resource struct {
+	name        string
+	filecontent []byte
+}
+
+// getResources shall take in the sorted templates and output the resources
+// which consists of name(name+kind) and filecontent
+func getResources(st []helm.KubernetesResourceTemplate) ([]resource, error) {
+	var resources []resource
+	for _, t := range st {
+		yamlStruct, err := utils.ExtractYamlParameters(t.FilePath)
+		yamlFile, err := ioutil.ReadFile(t.FilePath)
+		if err != nil {
+			return nil, pkgerrors.Wrap(err, "Failed to get the resources..")
+		}
+		n := yamlStruct.Metadata.Name + SEPARATOR + yamlStruct.Kind
+
+		resources = append(resources, resource{name: n, filecontent: yamlFile})
+
+		log.Info(":: Added resource into resource-order ::", log.Fields{"ResourceName":n})
+	}
+	return resources, nil
+}
+
+func addResourcesToCluster(ct appcontext.AppContext, ch interface{}, resources []resource, resourceOrder []string) error {
+	for _, resource := range resources {
+
+		resourceOrder = append(resourceOrder, resource.name)
+		_, err := ct.AddResource(ch, resource.name, resource.filecontent)
+		if err != nil {
+			cleanuperr := ct.DeleteCompositeApp()
+			if cleanuperr != nil {
+				log.Info(":: Error Cleaning up AppContext after add resource failure ::", log.Fields{"Resource":resource.name, "Error":cleanuperr.Error})
+			}
+			return pkgerrors.Wrapf(err, "Error adding resource ::%s to AppContext", resource.name)
+		}
+		_, err = ct.AddInstruction(ch, "resource", "order", resourceOrder)
+		if err != nil {
+			cleanuperr := ct.DeleteCompositeApp()
+			if cleanuperr != nil {
+				log.Info(":: Error Cleaning up AppContext after add instruction failure ::", log.Fields{"Resource":resource.name, "Error":cleanuperr.Error})
+			}
+			return pkgerrors.Wrapf(err, "Error adding instruction for resource ::%s to AppContext", resource.name)
+		}
+	}
+	return nil
+}
+
+func addClustersToAppContext(l gpic.Clusters, ct appcontext.AppContext, appHandle interface{}, resources []resource) error {
+	for _, c := range l.ClustersWithName {
+		p := c.ProviderName
+		n := c.ClusterName
+		var resourceOrder []string
+		clusterhandle, err := ct.AddCluster(appHandle, p+SEPARATOR+n)
+		if err != nil {
+			cleanuperr := ct.DeleteCompositeApp()
+			if cleanuperr != nil {
+				log.Info(":: Error Cleaning up AppContext after add cluster failure ::", log.Fields{"cluster-provider":p, "cluster-name":n, "Error":cleanuperr.Error})
+			}
+			return pkgerrors.Wrapf(err, "Error adding Cluster(provider::%s and name::%s) to AppContext", p, n)
+		}
+
+		err = addResourcesToCluster(ct, clusterhandle, resources, resourceOrder)
+		if err != nil {
+			return pkgerrors.Wrapf(err, "Error adding Resources to Cluster(provider::%s and name::%s) to AppContext", p, n)
+		}
+	}
+	return nil
+}
+
+/*
+verifyResources method is just to check if the resource handles are correctly saved.
+*/
+
+func verifyResources(l gpic.Clusters, ct appcontext.AppContext, resources []resource, appName string) error {
+	for _, c := range l.ClustersWithName {
+		p := c.ProviderName
+		n := c.ClusterName
+		cn := p + SEPARATOR + n
+		for _, res := range resources {
+
+			rh, err := ct.GetResourceHandle(appName, cn, res.name)
+			if err != nil {
+				return pkgerrors.Wrapf(err, "Error getting resoure handle for resource :: %s, app:: %s, cluster :: %s", appName, res.name, cn)
+			}
+			log.Info(":: GetResourceHandle ::", log.Fields{"ResourceHandler":rh, "appName":appName, "Cluster": cn, "Resource":res.name})
+
+		}
+
+	}
+
+	return nil
+}
+
+/*
+Instantiate methods takes in projectName, compositeAppName, compositeAppVersion,
+DeploymentIntentName. This method is responsible for template resolution, intent
+resolution, creation and saving of context for saving into etcd.
+*/
 func (c InstantiationClient) Instantiate(p string, ca string, v string, di string) error {
 
 	dIGrp, err := NewDeploymentIntentGroupClient().GetDeploymentIntentGroup(di, p, ca, v)
@@ -153,36 +283,102 @@ func (c InstantiationClient) Instantiate(p string, ca string, v string, di strin
 	overrideValues := dIGrp.Spec.OverrideValuesObj
 	cp := dIGrp.Spec.Profile
 
-	gIntent, err := FindGenericPlacementIntent(p, ca, v, di)
+	gIntent, err := findGenericPlacementIntent(p, ca, v, di)
 	if err != nil {
 		return err
 	}
-	log.Printf("The name of the GenPlacIntent:: %s", gIntent)
 
-	log.Printf("dIGrp :: %s, releaseName :: %s and cp :: %s \n", dIGrp.MetaData.Name, rName, cp)
+	log.Info(":: The name of the GenPlacIntent ::", log.Fields{"GenPlmtIntent":gIntent})
+	log.Info(":: DeploymentIntentGroup, ReleaseName, CompositeProfile ::", log.Fields{"dIGrp":dIGrp.MetaData.Name, "releaseName":rName, "cp":cp})
+
 	allApps, err := NewAppClient().GetApps(p, ca, v)
 	if err != nil {
 		return pkgerrors.Wrap(err, "Not finding the apps")
 	}
+
+	// Make an app context for the compositeApp
+	context := appcontext.AppContext{}
+	ctxval, err := context.InitAppContext()
+	if err != nil {
+		return pkgerrors.Wrap(err, "Error creating AppContext CompositeApp")
+	}
+	compositeHandle, err := context.CreateCompositeApp()
+	if err != nil {
+		return pkgerrors.Wrap(err, "Error creating AppContext")
+	}
+
+	var appOrder []string
+
+	// Add composite app using appContext
 	for _, eachApp := range allApps {
+		appOrder = append(appOrder, eachApp.Metadata.Name)
 		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.Info(":: Resolved all the templates ::", log.Fields{"appName":eachApp.Metadata.Name, "SortedTemplate":sortedTemplates})
+
+		resources, err := getResources(sortedTemplates)
+		if err != nil {
+			return pkgerrors.Wrapf(err, "Unable to get the resources for app :: %s", eachApp.Metadata.Name)
+		}
 
 		specData, err := NewAppIntentClient().GetAllIntentsByApp(eachApp.Metadata.Name, p, ca, v, gIntent)
 		if err != nil {
 			return pkgerrors.Wrap(err, "Unable to get the intents for app")
 		}
-		listOfClusters,err := gpic.IntentResolver(specData.Intent)
-		if err!=nil {
+		listOfClusters, err := gpic.IntentResolver(specData.Intent)
+		if err != nil {
 			return pkgerrors.Wrap(err, "Unable to get the intents resolved for app")
 		}
-		log.Printf("::listOfClusters:: %v", listOfClusters)
 
+		log.Info(":: listOfClusters ::", log.Fields{"listOfClusters":listOfClusters})
+
+		//BEGIN: storing into etcd
+		// Add an app to the app context
+		apphandle, err := context.AddApp(compositeHandle, eachApp.Metadata.Name)
+		if err != nil {
+			cleanuperr := context.DeleteCompositeApp()
+			if cleanuperr != nil {
+				log.Info(":: Error Cleaning up AppContext compositeApp failure ::", log.Fields{"Error":cleanuperr.Error(), "AppName":eachApp.Metadata.Name})
+			}
+			return pkgerrors.Wrap(err, "Error adding App to AppContext")
+		}
+		err = addClustersToAppContext(listOfClusters, context, apphandle, resources)
+		if err != nil {
+			log.Info(":: Error while adding cluster and resources to app ::", log.Fields{"Error":err.Error(), "AppName":eachApp.Metadata.Name})
+		}
+		err = verifyResources(listOfClusters, context, resources, eachApp.Metadata.Name)
+		if err != nil {
+			log.Info(":: Error while verifying resources in app ::", log.Fields{"Error":err.Error(), "AppName":eachApp.Metadata.Name})
+		}
+
+	}
+	context.AddInstruction(compositeHandle, "app", "order", appOrder)
+	//END: storing into etcd
+
+	// BEGIN:: save the context in the orchestrator db record
+	key := InstantiationKey{
+		IntentName:            gIntent,
+		Project:               p,
+		CompositeApp:          ca,
+		Version:               v,
+		DeploymentIntentGroup: di,
+	}
+
+	err = db.DBconn.Insert(c.db.storeName, key, nil, c.db.tagContext, ctxval)
+	if err != nil {
+		cleanuperr := context.DeleteCompositeApp()
+		if cleanuperr != nil {
+
+			log.Info(":: Error Cleaning up AppContext while saving context in the db for GPIntent ::", log.Fields{"Error":cleanuperr.Error(), "GPIntent":gIntent, "DeploymentIntentGroup":di, "CompositeApp":ca, "CompositeAppVersion":v, "Project":p})
+		}
+		return pkgerrors.Wrap(err, "Error adding AppContext to DB")
 	}
-	log.Printf("Done with instantiation...")
+	// END:: save the context in the orchestrator db record
+
+	log.Info(":: Done with instantiation... ::", log.Fields{"CompositeAppName":ca})
 	return err
 }
diff --git a/src/orchestrator/utils/utils.go b/src/orchestrator/utils/utils.go
index 13c78ba4..22ce903b 100644
--- a/src/orchestrator/utils/utils.go
+++ b/src/orchestrator/utils/utils.go
@@ -19,15 +19,105 @@ package utils
 import (
 	"archive/tar"
 	"compress/gzip"
+	"strings"
+
 	"io"
 	"io/ioutil"
+	"log"
 	"os"
 	"path"
 	"path/filepath"
 
 	pkgerrors "github.com/pkg/errors"
+	yaml "gopkg.in/yaml.v3"
 )
 
+// ListYamlStruct is applied when the kind is list
+type ListYamlStruct struct {
+	APIVersion string       `yaml:"apiVersion,omitempty"`
+	Kind       string       `yaml:"kind,omitempty"`
+	items      []YamlStruct `yaml:"items,omitempty"`
+}
+
+// YamlStruct represents normal parameters in a manifest file.
+// Over the course of time, Pls add more parameters as and when you require.
+type YamlStruct struct {
+	APIVersion string `yaml:"apiVersion,omitempty"`
+	Kind       string `yaml:"kind,omitempty"`
+	Metadata   struct {
+		Name      string `yaml:"name,omitempty"`
+		Namespace string `yaml:"namespace,omitempty"`
+		Labels    struct {
+			RouterDeisIoRoutable string `yaml:"router.deis.io/routable,omitempty"`
+		} `yaml:"labels"`
+		Annotations struct {
+			RouterDeisIoDomains string `yaml:"router.deis.io/domains,omitempty"`
+		} `yaml:"annotations,omitempty"`
+	} `yaml:"metadata,omitempty"`
+	Spec struct {
+		Type     string `yaml:"type,omitempty"`
+		Selector struct {
+			App string `yaml:"app,omitempty"`
+		} `yaml:"selector,omitempty"`
+		Ports []struct {
+			Name     string `yaml:"name,omitempty"`
+			Port     int    `yaml:"port,omitempty"`
+			NodePort int    `yaml:"nodePort,omitempty"`
+		} `yaml:"ports"`
+	} `yaml:"spec"`
+}
+
+func (y YamlStruct) isValid() bool {
+	if y.APIVersion == "" {
+		log.Printf("apiVersion is missing in manifest file")
+		return false
+	}
+	if y.Kind == "" {
+		log.Printf("kind is missing in manifest file")
+		return false
+	}
+	if y.Metadata.Name == "" {
+		log.Printf("metadata.name is missing in manifest file")
+		return false
+	}
+	return true
+}
+
+// ExtractYamlParameters is a method which takes in the abolute path of a manifest file
+// and returns a struct accordingly
+func ExtractYamlParameters(f string) (YamlStruct, error) {
+	filename, _ := filepath.Abs(f)
+	yamlFile, err := ioutil.ReadFile(filename)
+
+	var yamlStruct YamlStruct
+
+	err = yaml.Unmarshal(yamlFile, &yamlStruct)
+	if err != nil {
+		return YamlStruct{}, pkgerrors.New("Cant unmarshal yaml file ..")
+	}
+
+	/* This is a special case handling when the kind is "List".
+	When the kind is list and the metadata name is empty.
+	We set the metadata name as the file name. For eg:
+	if filename is "/tmp/helm-tmpl-240995533/prometheus/templates/serviceaccount.yaml-0".
+	We set metadata name as "serviceaccount.yaml-0"
+	Usually when the kind is list, the list might contains a list of
+	*/
+	if yamlStruct.Kind == "List" && yamlStruct.Metadata.Name == "" {
+		li := strings.LastIndex(filename, "/")
+		fn := string(filename[li+1:])
+		yamlStruct.Metadata.Name = fn
+		log.Printf("Setting the metadata name as :: %s", fn)
+	}
+	if yamlStruct.isValid() {
+		log.Printf("YAML parameters for file ::%s \n %v", f, yamlStruct)
+		return yamlStruct, nil
+	}
+	log.Printf("YAML file ::%s has errors", f)
+	return YamlStruct{}, pkgerrors.Errorf("Cant extract parameters from yaml file :: %s", filename)
+
+}
+
 //ExtractTarBall provides functionality to extract a tar.gz file
 //into a temporary location for later use.
 //It returns the path to the new location
@@ -114,3 +204,13 @@ func EnsureDirectory(f string) error {
 	}
 	return os.MkdirAll(base, 0755)
 }
+
+// func main() {
+// 	filename := "./test.yaml"
+// 	yamlStruct, err := ExtractYamlParameters(filename)
+// 	if err!=nil {
+// 		log.Print(err)
+// 	}
+// 	fmt.Printf("%s+%s", yamlStruct.Metadata.Name, yamlStruct.Kind)
+// 	fmt.Printf("%v", yamlStruct)
+// }