From 1652c15cfdfe9ebb3e98ae6dcd9ccac1f2673e42 Mon Sep 17 00:00:00 2001
From: Andrew Block <andy.block@gmail.com>
Date: Thu, 8 Feb 2024 14:58:51 -0600
Subject: [PATCH] Support for accessing resources explicitly in multiple
 namespaces

Signed-off-by: Andrew Block <andy.block@gmail.com>
---
 main.go | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/main.go b/main.go
index 081701ce..ac262f43 100644
--- a/main.go
+++ b/main.go
@@ -18,11 +18,14 @@ package main
 
 import (
 	"flag"
-	v1 "k8s.io/api/core/v1"
 	"os"
-	"sigs.k8s.io/controller-runtime/pkg/client"
+	"strings"
 	"time"
 
+	v1 "k8s.io/api/core/v1"
+	"sigs.k8s.io/controller-runtime/pkg/cache"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
 	userv1 "github.com/openshift/api/user/v1"
 	"github.com/redhat-cop/operator-utils/pkg/util"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -86,7 +89,7 @@ func main() {
 
 	watchNamespace := getWatchNamespace()
 
-	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
+	options := ctrl.Options{
 		Scheme:                     scheme,
 		ClientDisableCacheFor:      []client.Object{&v1.Secret{}},
 		MetricsBindAddress:         metricsAddr,
@@ -99,7 +102,15 @@ func main() {
 		RenewDeadline:              &renewDeadline,
 		RetryPeriod:                &retryPeriod,
 		Namespace:                  watchNamespace,
-	})
+	}
+
+	if strings.Contains(watchNamespace, ",") {
+		setupLog.Info("manager set up with multiple namespaces", "namespaces", watchNamespace)
+		options.Namespace = ""
+		options.NewCache = cache.MultiNamespacedCacheBuilder(strings.Split(watchNamespace, ","))
+	}
+
+	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), options)
 	if err != nil {
 		setupLog.Error(err, "unable to start manager")
 		os.Exit(1)