bundle: set ROLEARN env variable in noobaa subscription

If ROLEARN env variable is set, then pass on that env variable
to noobaa subscription.

Signed-off-by: Nikhil-Ladha <nikhilladha1999@gmail.com>

controllers/subscriptions.go

@@ -19,6 +19,7 @@ package controllers
 import (
 	"context"
 	"fmt"
+	"os"
 
 	"go.uber.org/multierr"
 	corev1 "k8s.io/api/core/v1"
@@ -61,6 +62,10 @@ func CheckExistingSubscriptions(cli client.Client, desiredSubscription *operator
 			// If the config is not set, only then set it to the desired value => allow user to override
 			if actualSub.Spec.Config == nil {
 				actualSub.Spec.Config = desiredSubscription.Spec.Config
+			} else if actualSub.Spec.Config != nil && desiredSubscription.Spec.Config != nil {
+				// Combines the environment variables from both subscriptions.
+				// If actualSub already contains an environment variable, its value will be updated with the value from desiredSubscription.
+				actualSub.Spec.Config.Env = getMergedEnvVars(actualSub.Spec.Config.Env, desiredSubscription.Spec.Config.Env)
 			}
 
 			desiredSubscription = actualSub
@@ -70,6 +75,30 @@ func CheckExistingSubscriptions(cli client.Client, desiredSubscription *operator
 	return desiredSubscription, nil
 }
 
+// getMergedEnvVars updates the env variables in the existing subscription with the desired subscription
+func getMergedEnvVars(existingSub, desiredSub []corev1.EnvVar) []corev1.EnvVar {
+	envMap := make(map[string]string)
+
+	for _, env := range existingSub {
+		envMap[env.Name] = env.Value
+	}
+
+	for _, env := range desiredSub {
+		envMap[env.Name] = env.Value
+	}
+
+	// Convert the map back to a slice
+	var updatedEnvVars []corev1.EnvVar
+	for key, value := range envMap {
+		updatedEnvVars = append(updatedEnvVars, corev1.EnvVar{
+			Name:  key,
+			Value: value,
+		})
+	}
+
+	return updatedEnvVars
+}
+
 func EnsureDesiredSubscription(cli client.Client, desiredSubscription *operatorv1alpha1.Subscription) error {
 
 	var err error
@@ -243,6 +272,18 @@ func GetStorageClusterSubscriptions() []*operatorv1alpha1.Subscription {
 		},
 	}
 
+	roleARN := os.Getenv("ROLEARN")
+	if roleARN != "" {
+		noobaaSubscription.Spec.Config = &operatorv1alpha1.SubscriptionConfig{
+			Env: []corev1.EnvVar{
+				{
+					Name:  "ROLEARN",
+					Value: roleARN,
+				},
+			},
+		}
+	}
+
 	ocsSubscription := &operatorv1alpha1.Subscription{
 		ObjectMeta: metav1.ObjectMeta{
 			Name:      OcsSubscriptionName,