delete env SYSTEM_NAMESPACE FROM operator.

pkg/operator/operator.go

@@ -44,7 +44,6 @@ import (
 
 	"sigs.k8s.io/karpenter/pkg/cloudprovider"
 	"sigs.k8s.io/karpenter/pkg/events"
-	"sigs.k8s.io/karpenter/pkg/utils/env"
 
 	"sigs.k8s.io/karpenter/pkg/metrics"
 
@@ -113,22 +112,6 @@ type Operator struct {
 func NewOperator() (context.Context, *Operator) {
 	// Root Context
 	ctx := signals.NewContext()
-	sysnsKey := "SYSTEM_NAMESPACE"
-	systemNamespace := env.WithDefaultString(sysnsKey, "")
-	if systemNamespace == "" {
-		panic(fmt.Sprintf(`The environment variable %q is not set
-
-		If this is a process running on Kubernetes, then it should be using the downward
-		API to initialize this variable via:
-		
-			env:
-			- name: %s
-			valueFrom:
-				fieldRef:
-				fieldPath: metadata.namespace
-		`, sysnsKey, sysnsKey))
-	}
-	ctx = knativeinjection.WithNamespaceScope(ctx, systemNamespace)
 
 	// Options
 	ctx = injection.WithOptionsOrDie(ctx, options.Injectables...)
@@ -169,7 +152,6 @@ func NewOperator() (context.Context, *Operator) {
 		LeaderElection:                !options.FromContext(ctx).DisableLeaderElection,
 		LeaderElectionID:              "karpenter-leader-election",
 		LeaderElectionResourceLock:    resourcelock.LeasesResourceLock,
-		LeaderElectionNamespace:       systemNamespace,
 		LeaderElectionReleaseOnCancel: true,
 		Metrics: server.Options{
 			BindAddress: fmt.Sprintf(":%d", options.FromContext(ctx).MetricsPort),