fix: add autoscaling eviction annotation to catalog pods to enable pr…

…oper draining of nodes (#2669)

Signed-off-by: Daniel Sover <dsover@redhat.com>

pkg/controller/registry/reconciler/reconciler.go

@@ -27,6 +27,8 @@ const (
  CatalogPriorityClassKey string = "operatorframework.io/priorityclass"
  // PodHashLabelKey is the key of a label for podspec hash information
  PodHashLabelKey = "olm.pod-spec-hash"
+ //ClusterAutoscalingAnnotation is the annotation that enables the cluster autoscaler to evict catalog pods
+ ClusterAutoscalingAnnotationKey string = "cluster-autoscaler.kubernetes.io/safe-to-evict"
 )
 
 // RegistryEnsurer describes methods for ensuring a registry exists.
@@ -207,6 +209,15 @@ func Pod(source *operatorsv1alpha1.CatalogSource, name string, image string, saN
  }
  labels[PodHashLabelKey] = hashPodSpec(pod.Spec)
  pod.SetLabels(labels)
+
+ // add eviction annotation to enable the cluster autoscaler to evict the pod in order to drain the node
+ // since catalog pods are not backed by a controller, they cannot be evicted by default
+ if annotations == nil {
+ annotations = make(map[string]string)
+ }
+ annotations[ClusterAutoscalingAnnotationKey] = "true"
+ pod.SetAnnotations(annotations)
+
  return pod
 }