Application source for rendering values (#31)

* Adding option for image pull secret

* aplication templating

* Application source in rendering values

* Nil handling

* Upgraded chart version

* removing unnecessary nil check

charts/overwhelm/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: overwhelm
-version: 1.1.5
+version: 1.1.6
 maintainers:
     - name: "Expedia Group"
       url: "https://github.com/ExpediaGroup/overwhelm"

config/rbac/role.yaml

@@ -38,8 +38,10 @@ rules:
   resources:
   - events
   verbs:
+  - create
   - get
   - list
+  - update
   - watch
 - apiGroups:
   - ""

controllers/application_controller.go

@@ -20,13 +20,14 @@ import (
 	"crypto/sha1"
 	"errors"
 	"fmt"
+	"regexp"
+	"text/template"
+	"time"
+
 	"github.com/fluxcd/pkg/apis/meta"
 	"gopkg.in/yaml.v3"
-	"regexp"
 	"sigs.k8s.io/controller-runtime/pkg/event"
 	"sigs.k8s.io/controller-runtime/pkg/predicate"
-	"text/template"
-	"time"
 
 	"github.com/ExpediaGroup/overwhelm/analyzer"
 	"github.com/fluxcd/helm-controller/api/v2beta1"
@@ -97,7 +98,7 @@ var log logr.Logger
 //+kubebuilder:rbac:groups=core,resources=pods/status,verbs=get;watch
 //+kubebuilder:rbac:groups=apps,resources=deployments,verbs=get;list;watch
 //+kubebuilder:rbac:groups=apps,resources=replicasets,verbs=get;list;watch
-//+kubebuilder:rbac:groups=core,resources=events,verbs=get;list;watch
+//+kubebuilder:rbac:groups=core,resources=events,verbs=get;list;watch;update;create
 
 // Reconcile is part of the main kubernetes reconciliation loop which aims to
 // move the current state of the cluster closer to the desired state.
@@ -396,7 +397,7 @@ func (r *ApplicationReconciler) renderValues(application *v1.Application) error
 		if err != nil {
 			return err
 		}
-		if err = tmpl.Execute(buf, GetPreRenderData()); err != nil {
+		if err = tmpl.Execute(buf, GetPreRenderData(application.GetLabels())); err != nil {
 			return err
 		}
 		values[key] = buf.String()

controllers/generic.go

@@ -1,6 +1,8 @@
 package controllers
 
 import (
+	"strings"
+
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/informers"
@@ -11,7 +13,10 @@ import (
 
 var preRenderData = make(map[string]map[string]string)
 
+const expediaType = "k8s.expediagroup.com"
+
 const ReferenceLabel = "overwhelm.expediagroup.com/render-values-source"
+const ApplicationKey = "application"
 
 func LoadPreRenderData() {
 	labelOptions := informers.WithTweakListOptions(func(opts *metav1.ListOptions) {
@@ -44,6 +49,17 @@ func addToPrerenderData(cm *v1.ConfigMap) {
 	}
 }
 
-func GetPreRenderData() map[string]map[string]string {
+func GetPreRenderData(appLabels map[string]string) map[string]map[string]string {
+	for label, labelValue := range appLabels {
+		if strings.HasPrefix(label, expediaType) {
+			//Initialise the map, even if there is a single label matching criteria
+			if preRenderData[ApplicationKey] == nil {
+				preRenderData[ApplicationKey] = make(map[string]string)
+			}
+			trimmedLabel := strings.Trim(strings.TrimPrefix(label, expediaType), "/")
+			preRenderData[ApplicationKey][trimmedLabel] = labelValue
+		}
+	}
+
 	return preRenderData
 }